AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 8, 1997

REGISTRATION NO. 333-


SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM S-4
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933


MCKESSON CORPORATION
(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)


    DELAWARE                      5122                       94-3207296
(STATE OR OTHER            (PRIMARY STANDARD             (I.R.S. EMPLOYER
JURISDICTION OF        INDUSTRIAL CLASSIFICATION        IDENTIFICATION NO.)
INCORPORATION OR              CODE NUMBER)
  ORGANIZATION)

                                MCKESSON PLAZA
                                ONE POST STREET
                        SAN FRANCISCO, CALIFORNIA 94104
                                (415) 983-8300

(ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
REGISTRANT'S EXECUTIVE OFFICES)


NANCY A. MILLER
VICE PRESIDENT AND CORPORATE SECRETARY
MCKESSON CORPORATION
MCKESSON PLAZA, ONE POST STREET
SAN FRANCISCO, CALIFORNIA 94104
(415) 983-8300
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
OF AGENT FOR SERVICE)


COPY TO:

       IVAN D. MEYERSON                         GREGG A. NOEL
     MCKESSON CORPORATION               SKADDEN, ARPS, SLATE, MEAGHER
MCKESSON PLAZA, ONE POST STREET                  & FLOM LLP
SAN FRANCISCO, CALIFORNIA 94104            300 SOUTH GRAND AVENUE
        (415) 983-8300                  LOS ANGELES, CALIFORNIA 90071
                                               (213) 687-5000

                           ----------------

APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE OF THE SECURITIES TO THE PUBLIC: As soon as practicable after the effective date of this Registration Statement.
If any of the Securities being registered on this form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box. [_]

CALCULATION OF REGISTRATION FEE

========================================================================================
                                             PROPOSED       PROPOSED
                                             MAXIMUM        MAXIMUM
                                AMOUNT    OFFERING PRICE   AGGREGATE
  TITLE OF EACH CLASS OF        TO BE      PER SECURITY  OFFERING PRICE    AMOUNT OF
SECURITIES TO BE REGISTERED   REGISTERED      (1)(2)         (1)(2)     REGISTRATION FEE
----------------------------------------------------------------------------------------
 6.60% Exchange Notes due
  March 1, 2000.........     $175,000,000      100%       $175,000,000      $ 53,031
----------------------------------------------------------------------------------------
 6 7/8% Exchange Notes
  due March 1, 2002.....     $175,000,000      100%       $175,000,000      $ 53,031
----------------------------------------------------------------------------------------
 7.65% Exchange
  Debentures due March 1,
  2027..................     $175,000,000      100%       $175,000,000      $ 53,031
----------------------------------------------------------------------------------------
 Total..................     $525,000,000      100%       $175,000,000      $159,093
========================================================================================

(1) Estimated solely for the purposes of computing the registration fee in accordance with Rule 457 of the Securities Act.
(2) Exclusive of accrued interest, if any.


THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(A) OF THE SECURITIES ACT OF 1933, AS AMENDED OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A), MAY DETERMINE.



++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

+INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A         +
+REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE   +
+SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY  +
+OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT        +
+BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR   +
+THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE      +
+SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE    +
+UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF  +
+ANY STATE.                                                                    +

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ SUBJECT TO COMPLETION, DATED JULY 8, 1997 PROSPECTUS OFFERS TO EXCHANGE $175,000,000 6.60% EXCHANGE NOTES DUE MARCH 1, 2000, $175,000,000 6 7/8% EXCHANGE NOTES DUE MARCH 1, 2002 AND $175,000,000 7.65% EXCHANGE DEBENTURES DUE MARCH 1, 2027 OF MCKESSON CORPORATION

THE EXCHANGE OFFERS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME,
ON , 1997, UNLESS EXTENDED.

McKesson Corporation, a Delaware corporation (the "Company" or "McKesson"), is hereby offering (the "Exchange Offers"), upon the terms and subject to the conditions set forth in this Prospectus and the accompanying applicable Letter of Transmittal (the "Letter of Transmittal"), to exchange an aggregate principal amount of up to $525,000,000 of its 6.60% Exchange Notes due March 1, 2000 (the "Exchange Notes due 2000"), 6 7/8% Exchange Notes due March 1, 2002 (the "Exchange Notes due 2002") and 7.65% Exchange Debentures due March 1, 2027 (the "Exchange Debentures due 2027," and with the Exchange Notes due 2000 and the Exchange Notes due 2002, collectively, the "Exchange Notes"), which exchange has been registered under the Securities Act of 1933, as amended (the "Securities Act"), pursuant to a registration statement of which this Prospectus is a part, for its 6.60% Notes due March 1, 2000 (the "Private Notes due 2000," and with the Exchange Notes due 2000, the "Notes due 2000"), 6 7/8% Notes due March 1, 2002 (the "Private Notes due 2002," and with the Exchange Notes due 2002, the "Notes due 2002") and 7.65% Debentures due March 1, 2027 (the "Private Debentures due 2027," and with the Private Notes due 2000 and the Private Notes due 2002, collectively, the "Private Notes"), respectively, which Private Notes were issued on March 11, 1997 (the "Closing Date"). The forms and terms of the Exchange Notes and the corresponding Private Notes are identical in all material respects except that (i) the exchange will have been registered under the Securities Act, and therefore, the Exchange Notes will not bear legends restricting the transfer thereof and (ii) holders of the Exchange Notes will not be entitled to certain rights of holders of the Private Notes ("Holders") under the Registration Rights Agreement (as defined herein), which rights will terminate upon the consummation of the Exchange Offers. The Exchange Notes will evidence the same indebtedness as the corresponding Private Notes (which they replace) and will be entitled to the benefits of an indenture dated as of March 11, 1997 governing the Private Notes and the Exchange Notes (the "Indenture"). The Private Notes and the Exchange Notes are sometimes referred to herein collectively as the "Notes." See "The Exchange Offers" and "Description of Notes."

The Exchange Debentures due 2027 will be, as are the Private Debentures due 2027 (together with the Exchange Debentures due 2027, the "Debentures due 2027"), redeemable as a whole or in part, at the option of the Company, at any time at a redemption price equal to the greater of (i) 100% of their principal amount and (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Yield (as defined herein) plus 12.5 basis points, plus accrued interest to the date of redemption. See "Description of Notes--Optional Redemption."

(Continued on following page)

SEE "RISK FACTORS" BEGINNING ON PAGE 10 FOR A DESCRIPTION OF CERTAIN RISKS TO

BE CONSIDERED BY HOLDERS WHO TENDER THEIR PRIVATE NOTES IN THE EXCHANGE OFFERS.


THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.


The date of this Prospectus is , 1997


(Continued from previous page)

MCKESSON WILL ACCEPT FOR EXCHANGE ANY AND ALL VALIDLY TENDERED PRIVATE NOTES NOT WITHDRAWN PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON 1997, UNLESS ANY OF THE EXCHANGE OFFERS ARE EXTENDED BY MCKESSON IN ITS SOLE DISCRETION (THE "EXPIRATION DATES"). TENDERS OF PRIVATE NOTES MAY BE WITHDRAWN AT ANY TIME PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE APPLICABLE EXPIRATION DATE. THE EXCHANGE OFFERS ARE NOT CONDITIONED UPON ANY MINIMUM PRINCIPAL AMOUNT OF PRIVATE NOTES BEING TENDERED FOR EXCHANGE. PRIVATE NOTES MAY BE TENDERED ONLY IN INTEGRAL MULTIPLES OF $1,000. IN THE EVENT MCKESSON TERMINATES THE EXCHANGE OFFERS AND DOES NOT ACCEPT FOR EXCHANGE ANY PRIVATE NOTES, MCKESSON WILL PROMPTLY RETURN ALL PREVIOUSLY TENDERED PRIVATE NOTES TO THE HOLDERS THEREOF.

Prior to the Exchange Offers, there has been no public market for the Notes. McKesson does not intend to list the Notes on any securities exchange or to seek approval for quotation through any automated quotation system. There can be no assurance that an active market for the Notes will develop. To the extent that a market for the Notes does develop, the market value of the Notes will depend on market conditions (such as yields on alternative investments), general economic conditions, McKesson's financial condition and certain other factors. Such conditions might cause the Notes, to the extent that they are traded, to trade at a significant discount from face value. See "Risk Factors--Absence of Public Market."

The Exchange Notes are being offered hereunder in order to satisfy certain obligations of McKesson contained in the Registration Rights Agreement. See "The Exchange Offers--Consequences of Failure to Exchange" for a discussion of McKesson's belief, based on interpretations by the staff (the "Staff") of the Securities and Exchange Commission (the "Commission") as set forth in no action letters issued to third parties, as to the transferability of the Exchange Notes upon satisfaction of certain conditions. Each broker-dealer that receives Exchange Notes for its own account pursuant to the Exchange Offers must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Notes. See "Plan of Distribution." The Letter of Transmittal states that by so acknowledging and by delivering a prospectus, a broker-dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act. This Prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of Exchange Notes received in exchange for Private Notes acquired by such broker-dealer as a result of market-making activities or other trading activities. McKesson has agreed that, ending on the close of business on the 180th day following the Expiration Date, it will make this Prospectus available to any broker-dealer for use in connection with any such resale. See "Plan of Distribution."

McKesson will not receive any proceeds from, and has agreed to bear the expenses of, the Exchange Offers. No underwriter is being used in connection with the Exchange Offers.

THE EXCHANGE OFFERS ARE NOT BEING MADE TO, NOR WILL MCKESSON ACCEPT SURRENDERS FOR EXCHANGE FROM, HOLDERS OF PRIVATE NOTES IN ANY JURISDICTION IN WHICH THE EXCHANGE OFFERS OR THE ACCEPTANCE THEREOF WOULD NOT BE IN COMPLIANCE WITH THE SECURITIES OR BLUE SKY LAWS OF SUCH JURISDICTION.

2

AVAILABLE INFORMATION

This Prospectus constitutes part of a Registration Statement on Form S-4 (together with all amendments and exhibits thereto, the "Registration Statement") filed by the Company with the Commission under the Securities Act with respect to the Exchange Notes. This Prospectus omits certain of the information contained in the Registration Statement, and reference hereby is made to the Registration Statement and to the exhibits thereto for further information with respect to the Company and the Exchange Notes offered hereby. Any statements contained herein concerning the provisions of any document filed as an exhibit to the Registration Statement or otherwise filed with the Commission or incorporated by reference herein are not necessarily complete, and, in each instance, reference is made to the copy of such document so filed for a more complete description of the matter involved. Each such statement herein is qualified in its entirety by such reference.

The Company is subject to the informational requirements of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance therewith files reports, proxy statements and other information with the Commission. Such reports, proxy statements and other information filed by the Company with the Commission can be inspected and copied at the Commission's Public Reference Room at 450 Fifth Street, N.W., Washington, D.C. 20549, or at the public reference facilities of the regional offices in Chicago and New York. The addresses of these regional offices are as follows: 500 West Madison Street, Suite 1400, Chicago, Illinois 66061, and 7 World Trade Center, 13th Floor, New York, New York 10048. Copies of such material also can be obtained by mail from the Public Reference Section of the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549, upon payment of the fees prescribed by the rules and regulations of the Commission. Reports, proxy statements and other information concerning the Company may also be inspected at the offices of the New York Stock Exchange, Inc. (the "NYSE") at 20 Broad Street, New York, New York 10005 and at the offices of the Pacific Exchange, Inc. at 301 Pine Street, San Francisco, California 94104 and 233 South Beaudry Avenue, Los Angeles, California 90012, on which the Common Stock of the Company is listed. Such material may also be accessed electronically by means of the Commission's home page on the Internet at http://www.sec.gov.

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

There are hereby incorporated by reference in this Prospectus the following documents previously filed or to be filed by the Company with the Commission pursuant to the Exchange Act:

1. Annual Report on Form 10-K for the fiscal year ended March 31, 1997, filed on June 19, 1997 (the "Form 10-K").

2. Current Reports on Form 8-K dated November 22, 1996 (as amended by Amendment No. 1 on Form 8-K/A, filed on January 21, 1997 as further amended by Amendment No. 2 on Form 8-K/A, filed on April 28, 1997), April 7, 1997, June 13, 1997 and June 24, 1997.

All documents filed by the Company pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of this Prospectus and prior to the termination of the offering made hereby shall be deemed to be incorporated by reference in this Prospectus and to be part hereof from the date of filing of such documents. Any statement contained herein or in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Prospectus to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Prospectus.

THIS PROSPECTUS INCORPORATES DOCUMENTS BY REFERENCE WHICH ARE NOT PRESENTED HEREIN OR DELIVERED HEREWITH. THE COMPANY WILL PROVIDE WITHOUT CHARGE TO EACH PERSON, UPON THE WRITTEN OR ORAL REQUEST OF SUCH PERSON, A COPY OF ANY OR ALL OF THE FOREGOING DOCUMENTS INCORPORATED HEREIN BY REFERENCE, OTHER THAN EXHIBITS TO SUCH DOCUMENTS (UNLESS SUCH EXHIBITS ARE SPECIFICALLY INCORPORATED BY REFERENCE INTO SUCH DOCUMENTS). REQUESTS FOR SUCH DOCUMENTS SHALL BE DIRECTED TO NANCY A. MILLER, VICE PRESIDENT AND CORPORATE SECRETARY, MCKESSON CORPORATION, MCKESSON PLAZA, ONE POST STREET, SAN FRANCISCO, CALIFORNIA 94104 (TELEPHONE NUMBER (415) 983-8301). IN ORDER TO INSURE TIMELY DELIVERY OF THE DOCUMENTS, ANY REQUEST SHOULD BE MADE BY 5 BUSINESS DAYS PRIOR TO THE APPLICABLE EXPIRATION DATE.

3

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain of the matters discussed under the captions "Risk Factors," "Financial Review," "The Company" and elsewhere in this Prospectus or in the information incorporated by reference herein may constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and as such may involve known and unknown risks, uncertainties and other factors that may cause the actual results, performance or achievements of McKesson to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Given these uncertainties, prospective investors are cautioned not to place undue reliance on such statements. McKesson also undertakes no obligation to update these forward-looking statements.

4

PROSPECTUS SUMMARY

The following summary does not purport to be complete and is qualified in its entirety by the detailed information appearing elsewhere in the Prospectus or incorporated by reference herein.

THE COMPANY

McKesson is the largest health care supply management company in North America. The Company also develops and manages innovative marketing programs for drug manufacturers and, through McKesson Water Products Company, processes and markets pure drinking water.

The Company's objective is to become the world leader in health care supply and comprehensive pharmaceutical management across the entire supply chain, from manufacturer to patient. In pursuit of this goal, the Company has completed a number of acquisitions in its core health care business. Since late 1995, the Company has acquired General Medical Inc., a leading distributor of medical and surgical supplies to the acute care, physician care and extended care markets, the drug distribution business of FoxMeyer Corporation, Automated Healthcare, Inc., a manufacturer of automated drug dispensing equipment for hospitals, and Ogden BioServices Corporation (now McKesson BioServices Corporation), a provider of support services to government and commercial organizations engaged in drug research and development. For a more complete discussion of the Company and its recent acquisitions, see "The Company."

THE EXCHANGE OFFERS

Securities Offered .........  The Company is offering to exchange pursuant to
                              the Exchange Offers up to (i) $175,000,000
                              principal amount of Exchange Notes due 2000 for
                              $175,000,000 principal amount of Private Notes
                              due 2000, (ii) $175,000,000 principal amount of
                              Exchange Notes due 2002 for $175,000,000
                              principal amount of Private Notes due 2002 and
                              (iii) $175,000,000 principal amount of Exchange
                              Debentures due 2027 for $175,000,000 principal
                              amount of Private Debentures due 2027, all of
                              which have been registered under the Securities
                              Act. The forms and terms of the Exchange Notes
                              and the corresponding Private Notes are identical
                              in all material respects, except for certain
                              transfer restrictions and registration rights
                              relating to the Private Notes and except that
                              Holders of Private Notes of Exchange Offers that
                              have not been consummated by October 22, 1997
                              will be entitled to liquidated damages in an
                              amount equal to 0.25% per annum on the Private
                              Notes held by such Holders. Liquidated damages,
                              if any, will accrue from and including October
                              23, 1997 and will cease to accrue from the
                              consummation of the applicable Exchange Offer.

The Exchange Offers.........  The Exchange Notes are being offered in exchange
                              for a like principal amount of corresponding
                              Private Notes. The issuance of the Exchange Notes
                              is intended to satisfy obligations of the Company
                              contained in the Registration Rights Agreement.
                              The Exchange Notes evidence the same debt as the
                              Private Notes and will be issued, and Holders
                              thereof are entitled to the same benefits as
                              Holders of the Private Notes, under the
                              Indenture. See "The Exchange Offers."

                                       5

Tenders, Expiration Date,
Withdrawals.................  The Exchange Offers will expire at 5:00 p.m., New
                              York City time, on     , 1997, or such later time
                              and date to which any of them may be extended by
                              the Company in its sole discretion. Tenders of
                              Private Notes may be withdrawn at any time prior
                              to 5:00 p.m., New York City time on the
                              applicable Expiration Date. Private Notes not
                              accepted for exchange for any reason will be
                              returned without expense to the tendering holder
                              thereof as promptly as practicable after the
                              expiration or termination of the applicable
                              Exchange Offer. See "The Exchange Offers."

Procedures for Tendering
Private Notes ..............  Brokers, dealers, commercial banks, trust
                              companies and other nominees who hold Private
                              Notes through the Depository Trust Company
                              ("DTC") must effect tenders by book-entry
                              transfer in accordance with DTC's Automated
                              Tender Offer Program ("ATOP"). Beneficial owners
                              of Private Notes registered in the name of a
                              broker, dealer, commercial bank, trust company or
                              other nominee are urged to contact such person
                              promptly if they wish to tender Private Notes
                              pursuant to the Exchange Offers. Tendering
                              Holders of Private Notes that do not use ATOP
                              must complete and sign the applicable Letter of
                              Transmittal (the YELLOW Letter of Transmittal for
                              the Private Notes due 2000, the BLUE Letter of
                              Transmittal for the Private Notes due 2002 and
                              the PINK Letter of Transmittal for the Private
                              Debentures due 2027) in accordance with the
                              instructions contained therein and forward the
                              same by mail, facsimile or hand delivery,
                              together with any other required documents, to
                              the Exchange Agent, either with the certificates
                              of the Private Notes to be tendered or in
                              compliance with the specified procedures for
                              guaranteed delivery of Private Notes. Tendering
                              holders of Private Notes that use ATOP will, by
                              so doing, acknowledge that they are bound by the
                              terms of the applicable Letter of Transmittal.

See "The Exchange Offers--Procedures for Tendering Private Notes."

Letters of Transmittal and certificates representing Private Notes should not be sent to the Company. Such documents should only be sent to the Exchange Agent.

Federal Income Tax

Consequences ...............  The exchange pursuant to the Exchange Offers will
                              not be a taxable transaction for Federal income
                              tax purposes. See "Certain United States Federal
                              Tax Consequences."

Exchange Agent .............  The First National Bank of Chicago is serving as
                              Exchange Agent (the "Exchange Agent") in
                              connection with the Exchange Offers.

6

CONSEQUENCES OF FAILURE TO EXCHANGE PRIVATE NOTES
PURSUANT TO THE EXCHANGE OFFERS AND CERTAIN REQUIREMENTS FOR TRANSFER OF
EXCHANGE NOTES

Holders of Private Notes who do not exchange their Private Notes for the corresponding Exchange Notes pursuant to the Exchange Offers will continue to be subject to the provisions in the Indenture regarding transfer and exchange of the Private Notes and the restrictions on transfer of such Private Notes as set forth in the legend thereon as a consequence of the issuance of the Private Notes pursuant to exemptions from, or in transactions not subject to, the registration requirements of the Securities Act and applicable state securities laws. In general, the Private Notes may not be offered or sold, unless registered under the Securities Act, except pursuant to an exemption from, or in a transaction not subject to, the Securities Act and applicable state securities laws. The Company does not currently anticipate that it will register Private Notes under the Securities Act. See "Description of Notes-- Registration Rights." Based on existing interpretations by the Staff, as set forth in several no-action letters to third parties, and subject to the immediately following sentence, the Company believes that Exchange Notes issued pursuant to the Exchange Offers in exchange for Private Notes may be offered for resale, resold and otherwise transferred by the holders thereof (other than holders who are broker-dealers) without further compliance with the registration and prospectus delivery provisions of the Securities Act. However, any purchaser of Private Notes who is an affiliate of the Company within the meaning of Rule 405 under the Securities Act ("affiliate") or who intends to participate in the Exchange Offers for the purpose of distributing the Exchange Notes, or any broker-dealer who purchased the Private Notes from the Company to resell pursuant to Rule 144A under the Securities Act ("Rule 144A") or any other available exemption under the Securities Act, (i) will not be able to rely on the interpretations of the Staff set forth in the above-mentioned no- action letters, (ii) will not be entitled to tender its Private Notes in the Exchange Offers and (iii) must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any sale or transfer of the Private Notes unless such sale or transfer is made pursuant to an exemption from such requirements. The Company does not intend to request the Commission to consider, and the Commission has not considered, the Exchange Offers in the context of a no-action letter and there can be no assurance that the Staff would make a similar determination with respect to the Exchange Offers as in such other circumstances.

Each Holder of the Private Notes who wishes to exchange the Private Notes for Exchange Notes in the Exchange Offers will be required to represent that (i) it is not an affiliate of the Company, (ii) the Exchange Notes to be received by it were acquired in the ordinary course of its business and (iii) at the time of the Exchange Offers, it has no arrangement with any person to participate in the distribution within the meaning of the Securities Act ("distribution") of the Exchange Notes. Each broker-dealer that receives Exchange Notes for its own account in exchange for Private Notes, where such Private Notes were acquired by such broker-dealer as a result of market-making activities or other trading activities, must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Notes. See "Plan of Distribution." The information set forth above concerning certain interpretations of and positions taken by the Staff is not intended to constitute legal advice, and prospective investors should consult their own legal advisors with respect to such matters.

7

THE EXCHANGE NOTES

The forms and terms of the Exchange Notes and the corresponding Private Notes are identical in all material respects except for certain transfer restrictions and registration rights relating to the Private Notes and except that Holders of Private Notes of Exchange Offers that have not been consummated by October 22, 1997 will be entitled to liquidated damages in an amount equal to 0.25% per annum on the Private Notes held by such Holders. Liquidated damages, if any, will accrue from and including October 23, 1997 and will cease to accrue from the consummation of the applicable Exchange Offer. The Exchange Notes will bear interest from the most recent date to which interest has been paid on the applicable Private Notes or, if no interest has been paid, from March 1, 1997. Accordingly, if the relevant record date for interest payment occurs after the consummation of the applicable Exchange Offer registered holders of such Exchange Notes on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. If, however, the relevant record date for interest payment occurs prior to the consummation of the applicable Exchange Offer registered holders of such Private Notes on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. Holders of Private Notes whose Private Notes are accepted for exchange will not receive any payment in respect of accrued interest on such Private Notes otherwise payable on any interest payment date the record date for which occurs on or after consummation of the Exchange Offers.

Securities Offered .........  Up to (i) $175,000,000 principal amount of
                              Exchange Notes due 2000, (ii) $175,000,000
                              principal amount of Exchange Notes due 2002 and
                              (iii) $175,000,000 principal amount of Exchange
                              Debentures due 2027.

Interest Rates; Payment       Interest on the Exchange Notes due 2000, the
Dates ......................  Exchange Notes due 2002 and the Exchange
                              Debentures due 2027 will accrue at the rates of
                              6.60%, 6 7/8% and 7.65% per annum, respectively,
                              payable semiannually in arrears on March 1 and
                              September 1 of each year, commencing September 1,
                              1997, to the persons in whose name the Exchange
                              Notes are registered at the close of business on
                              the immediately preceding February 15th and
                              August 15th, respectively.

Maturity Dates .............  Exchange Notes due 2000: March 1, 2000.
                              Exchange Notes due 2002: March 1, 2002.
                              Exchange Debentures due 2027: March 1, 2027.

Optional Redemption ........  The Exchange Notes due 2000 and the Exchange
                              Notes due 2002 will not be redeemable prior to
                              maturity. The Exchange Debentures due 2027 will
                              be redeemable as a whole or in part, at the
                              option of the Company, at any time at a
                              redemption price equal to the greater of (i) 100%
                              of their principal amount and (ii) the sum of the
                              present values of the remaining scheduled
                              payments of principal and interest thereon
                              discounted to the date of redemption on a semi-
                              annual basis (assuming a 360-day year consisting
                              of twelve 30-day months) at the Treasury Yield
                              plus 12.5 basis points, plus accrued interest to
                              the date of redemption.

Ranking ....................  The Exchange Notes will constitute unsecured,
                              unsubordinated obligations of the Company.
                              Payment of the principal of and interest on the
                              Exchange Notes will rank pari passu with all
                              other unsecured, unsubordinated debt of the
                              Company. The Exchange Notes will rank pari passu
                              in right of payment to the Private Notes. See
                              "Description of Notes--General."

8

Certain Covenants ..........  The Indenture contains certain covenants,
                              including limitations on the ability of the
                              Company to: (i) incur certain liens; (ii) engage
                              in certain sale and lease-back transactions; or
                              (iii) engage in mergers, consolidations or
                              transfer or lease its assets substantially as an
                              entirety to another person. See "Description of
                              Notes--Certain Covenants of the Company."

Use of Proceeds ............
                              The Company will not receive any proceeds from
                              the Exchange Offers.

Registration Rights ........  Holders of Exchange Notes are not entitled to any
                              registration rights with respect to the Exchange
                              Notes. Pursuant to the Registration Rights
                              Agreement, McKesson agreed to file, at its
                              expense, a registration statement with respect to
                              the Exchange Offers. The Registration Statement
                              of which this Prospectus is a part constitutes
                              the registration statement for the Exchange
                              Offers. See "Description of Notes--Registration
                              Rights."

RISK FACTORS

Prospective holders of Exchange Notes should consider carefully all of the information set forth in this Prospectus and, in particular, should evaluate the specific factors set forth under "Risk Factors" before making a decision to tender their Private Notes in the Exchange Offers.

9

RISK FACTORS

Prospective holders of Exchange Notes should consider carefully all of the information set forth in this Prospectus and, in particular, should evaluate the following risks before making a decision to tender their Private Notes in the Exchange Offers.

CONSEQUENCES OF FAILURE TO EXCHANGE AND REQUIREMENTS FOR TRANSFER OF EXCHANGE NOTES

Holders of Private Notes who do not exchange their Private Notes for corresponding Exchange Notes pursuant to the Exchange Offers will continue to be subject to the provisions in the Indenture regarding transfer and exchange of the Private Notes and the restrictions on transfer of such Private Notes as set forth in the legend thereon as a consequence of the issuance of the Private Notes pursuant to exemptions from, or in transactions not subject to, the registration requirements of the Securities Act and applicable state securities laws. In general, the Private Notes may not be offered or sold, unless registered under the Securities Act, except pursuant to an exemption from, or in a transaction not subject to, the Securities Act and applicable state securities laws. The Company does not currently anticipate that it will register Private Notes under the Securities Act. See "Description of Notes-- Registration Rights." To the extent that Private Notes are tendered and accepted in the Exchange Offers, the trading market for the remaining untendered Private Notes could be adversely affected. Based on existing interpretations by the Staff, as set forth in several no-action letters to third parties, and subject to the immediately following sentence, the Company believes that Exchange Notes issued pursuant to the Exchange Offers in exchange for Private Notes may be offered for resale, resold and otherwise transferred by the holders thereof (other than holders who are broker-dealers) without further compliance with the registration and prospectus delivery provisions of the Securities Act. However, any purchaser of Private Notes who is an affiliate of the Company or who intends to participate in the Exchange Offers for the purpose of distributing the Exchange Notes, or any broker- dealer who purchased the Private Notes from the Company to resell pursuant to Rule 144A or any other available exemption under the Securities Act, (i) will not be able to rely on the interpretations of the Staff set forth in the above-mentioned no-action letters, (ii) will not be entitled to tender its Private Notes in the Exchange Offers and (iii) must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any sale or transfer of the Private Notes unless such sale or transfer is made pursuant to an exemption from such requirements. The Company does not intend to request the Commission to consider, and the Commission has not considered, the Exchange Offers in the context of a no-action letter and there can be no assurance that the Staff would make a similar determination with respect to the Exchange Offers as in such other circumstances.

Each Holder of the Private Notes who wishes to exchange the Private Notes for Exchange Notes in the Exchange Offers will be required to represent that
(i) it is not an affiliate of the Company, (ii) the Exchange Notes to be received by it were acquired in the ordinary course of its business and (iii) at the time of the Exchange Offers, it has no arrangement with any person to participate in the distribution of the Exchange Notes. Each broker-dealer that receives Exchange Notes for its own account pursuant to the Exchange Offers must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Notes. See "Plan of Distribution." The Letters of Transmittal state that by so acknowledging and by delivering a Prospectus, a broker-dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act. This Prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of Exchange Notes received in exchange for Private Notes acquired by such broker-dealer as a result of market-making activities or other trading activities. The Company has agreed that, ending on the close of business on the 180th day following the Expiration Date, it will make this Prospectus available to any broker-dealer for use in connection with any such resale. See "Plan of Distribution."

EXCHANGE OFFERS PROCEDURES

Subject to the conditions set forth under "The Exchange Offers--Certain Conditions to the Exchange Offers," delivery of Exchange Notes in exchange for corresponding Private Notes tendered and accepted for exchange pursuant to the Exchange Offers will be made only after timely receipt by the Exchange Agent of (i) a

10

Book-Entry Confirmation (as defined below) evidencing the tender of such Private Notes through ATOP or (ii) certificates representing such Private Notes, a properly completed and duly executed applicable Letter of Transmittal, with any required signature guarantees, and all other required documents. See "The Exchange Offers--Procedures for Tendering Private Notes." Therefore, Holders of the Private Notes desiring to tender such Private Notes in exchange for corresponding Exchange Notes should allow sufficient time to ensure timely delivery. The Company is under no duty to give notification of defects or irregularities with respect to tenders of Private Notes for exchange. Private Notes that are not tendered or that are tendered but not accepted by the Company for exchange will, following consummation of the Exchange Offers, continue to be subject to the existing restrictions upon transfer thereof under the Securities Act and, upon consummation of the Exchange Offers, certain registration rights under the Registration Rights Agreement will terminate.

RISKS GENERALLY ASSOCIATED WITH ACQUISITIONS

An element of the Company's growth strategy is to pursue strategic acquisitions that either expand or complement the Company's business. Acquisitions involve a number of special risks, including the diversion of management's attention to the assimilation of the operations from other business concerns, difficulties in the integration of operations and systems, the assimilation and retention of the personnel of the acquired companies, challenges in retaining the acquired businesses' customers and potential adverse short-term effects on the Company's operating results. In addition, the Company may require additional debt or equity financing for future acquisitions, which may not be available on terms favorable to the Company, if at all. The inability of the Company to successfully finance, complete and integrate strategic acquisitions in a timely manner could have an adverse impact on the Company's results of operations and its ability to effect a portion of its growth strategy.

CHANGING UNITED STATES HEALTHCARE ENVIRONMENT

In recent years, the healthcare industry has undergone significant change driven by various efforts to reduce costs, including potential national healthcare reform, trends toward managed care, cuts in Medicare, consolidation of pharmaceutical and medical/surgical supply distributors and the development of large, sophisticated purchasing groups. The Company cannot predict whether any healthcare reform efforts will be enacted and what effect or to what extent any such reforms may have on the Company, its practices and products or its customers and suppliers. Changes in governmental support of healthcare services, the method by which such services are delivered, the prices for such services or other legislation or regulations governing such services or mandated benefits may have a material adverse effect on the Company's results of operations.

ABSENCE OF PUBLIC MARKET FOR THE NOTES

The Private Notes were issued on March 11, 1997 to QIBs and are eligible for trading in the Private Offering, Resale and Trading through Automated Linkages (PORTAL) Market, the National Association of Securities Dealers' screenbased, automated market for trading of securities eligible for resale under Rule 144A. To the extent that Private Notes are tendered and accepted in the applicable Exchange Offer, the trading market for the remaining untendered Private Notes could be adversely affected. There is no existing trading market for the Exchange Notes. Although Morgan Stanley & Co. Incorporated, BancAmerica Securities, Inc., Chase Securities Inc. and J.P. Morgan Securities Inc. (collectively, the "Initial Purchasers") have advised the Company that they currently intend to make a market in the Exchange Notes, they are not obligated to do so and may discontinue such market making at any time without notice. In addition, such market making activity will be subject to the limits imposed by the Securities Act and the Exchange Act. Accordingly, there can be no assurance that any market for the Exchange Notes will develop, or, if one does develop, that it will be maintained. If an active market for the Exchange Notes fails to develop or be sustained, the trading price of the Exchange Notes could be materially adversely affected. The Company does not intend to apply for listing or quotation of the Exchange Notes on any securities exchange, stock market or interdealer quotation system.

11

THE COMPANY

McKesson is the largest health care supply management company in North America. The Company also develops and manages innovative marketing programs for drug manufacturers and, through McKesson Water Products Company, processes and markets pure drinking water.

The Company's objective is to become the world leader in health care supply and comprehensive pharmaceutical management across the entire supply chain, from manufacturer to patient. In pursuit of this goal, the Company has completed a number of acquisitions in its core health care business. Since late 1995, the Company has acquired General Medical Inc. ("General Medical"), a leading distributor of medical and surgical supplies to the acute care, physician care and extended care markets, the drug distribution business of FoxMeyer Corporation ("FoxMeyer"), Automated Healthcare, Inc. ("AHI"), a manufacturer of automated drug dispensing equipment for hospitals, and Ogden BioServices Corporation (now "McKesson Bioservices Corporation"), a provider of support services to government and commercial organizations engaged in drug research and development.

The Company conducts its operations through two operating business segments which generated annual sales in fiscal 1997 of $12.9 billion, approximately 98% of which were generated by the Health Care Services segment and approximately 2% of which were generated primarily by McKesson's Water Products (as hereinafter defined) business. In fiscal 1997, operating profits for the Health Care Services business and the Water Products business were $92.8 million (including charges for restructuring, asset impairment, write- off of in-process purchased technology and other operating items of $140.0 million) and $34.6 million (including $7.0 million of charges for asset impairment), respectively.

The principal executive offices of the Company are located at McKesson Plaza, One Post Street, San Francisco, California 94104, and the telephone number is (415) 983-8300.

RECENT ACQUISITIONS AND DISPOSITIONS

McKesson has recently undertaken several initiatives to further focus the Company on its core health care business:

. In March 1997, McKesson disposed of Millbrook Distribution Services Inc. ("Millbrook"), a non-health care business, for an amount on an after-tax basis which approximated Millbrook's book value.

. In February 1997, McKesson acquired General Medical, the largest multi- market distributor of medical and surgical supplies, for $775 million.

. In December 1996, the Company disposed of its 55% equity interest in Armor All Products Corporation ("Armor All"), a non-health care business.

. In November 1996, the Company acquired FoxMeyer out of bankruptcy for approximately $598 million.

. In April 1996, the Company acquired AHI, a business that specializes in centralized robotic pharmaceutical dispensing systems for hospitals, for $65 million.

. In December 1995, the Company acquired McKesson Bioservices Corporation, a business that provides product marketing and support services for the pharmaceutical industry, for approximately $20 million.

MCKESSON HEALTH CARE SERVICES

Through its Health Care Services segment, the Company is the largest distributor of ethical and proprietary drugs and health and beauty care products in North America, generating approximately 73% of the Company's operating profits from continuing operations in fiscal 1997. The Company is the market leader in its core U.S. drug distribution business. U.S. health care operations also include Healthcare Delivery Systems, Inc. ("HDS") and McKesson Bioservices Corporation, through which the Company provides marketing and other support services to drug manufacturers, AHI, a business that specializes in automated pharmaceutical dispensing systems for hospitals,

12

Zee Medical, Inc., a distributor of first-aid products and supplies to industrial and commercial customers and General Medical, the nation's leading supplier of medical-surgical supplies. International operations include Medis Health and Pharmaceutical Services Inc., a wholly-owned subsidiary and the largest drug distributor in Canada, and the Company's 22.7% equity interest in Nadro, S.A. de C.V., the largest drug distributor in Mexico.

The Company's domestic distribution operations supply drugs and health and beauty care products to independent and chain drug stores, hospitals, alternate-site facilities, food stores and mass merchandisers in all 50 states. Using the names "Economost" and "Econolink" and a number of related service marks, the Company has promoted electronic order entry systems and a wide range of computerized merchandising and asset management services for drug retailers and hospitals. The Company also supplies computer-based practice management systems to drug retailers. The Company believes that its financial strength, purchasing leverage, nationwide network of distribution centers, and advanced logistics and information technologies provide competitive advantages to its drug distribution operations. For example, the Company uses Acumax(R), a computerized bar-code scanning system, to track items in its warehouses. Acumax enables the Company to achieve order filling and inventory accuracy levels of more than 99%, ensuring that the right product arrives at the right time and place for both the Company's customers and their patients.

Health Care Services serves three primary customer segments: retail independent pharmacies, retail chains and institutional providers (including hospitals, health care facilities and pharmacy service operators) which represented approximately 37%, 31%, and 32%, respectively, of U.S. Health Care Services revenues in the fourth fiscal quarter of 1997. A fourth customer category is pharmaceutical manufacturers, which is managed by McKesson's Pharmaceutical and Retail Services Business group.

INDEPENDENT PHARMACIES. In addition to distribution services, the Company provides value added services to independent retail pharmacies through management information systems, including inventory management, electronic billing, current pricing and other financial management offerings. In February 1996, McKesson launched the OmniLinkSM centralized pharmacy technology platform and the associated CareMaxSM network of independent pharmacies. The combined offering links independent pharmacies, creating a "virtual chain" for contracting with pharmaceutical suppliers and managed care organizations. As of March 31, 1997, OmniLink had been installed in over 1,800 pharmacies.

OmniLink offers pharmacies streamlined transaction processing through OmniLink's connectivity with managed care organizations, while promoting compliance with managed care formularies and appropriate reimbursement from managed care plans. The service also improves cash flow for pharmacies and enhances pharmacy revenues through programs such as 24-hour advanced funding of third-party reimbursements, prescription refill reminders, patient direct marketing and distribution of coupons and samples for over- the-counter products.

The Company currently has two pharmacy programs for independent pharmacies--Valu-Rite(R), a voluntary cooperative program, and Health Mart(R), a franchise program. Through Valu-Rite, the Company provides its independent U.S. retail drug store customers with a common marketing identity, group advertising, purchasing programs, promotional merchandise and access to a pharmacy provider network. At March 31, 1997, approximately 5,200 stores were participating in the Valu-Rite program. Through Health Mart, acquired as part of FoxMeyer, the Company provides its community pharmacists with a franchise program. Currently, Health Mart has approximately 650 franchisees. Together, Valu-Rite and Health Mart pharmacies comprise approximately 25% of the nation's independent retail pharmacies.

RETAIL CHAINS. Retail drug chains do business with the Company mainly through primary sourcing and secondary sourcing. In primary sourcing, a chain depends on the Company to supply its logistics, warehousing and contract administration functions, much as the Company performs primary distribution for all other retail customers. In secondary sourcing, the Company "backs up" the chains' own warehouses with deliveries on an as- needed basis.

13

INSTITUTIONAL BUSINESS. The Company, through its McKesson Health Systems unit, provides drug distribution services, and related logistics and management information systems support, to the institutional market, which includes hospitals, alternate-sites and integrated health networks. The acquisition of FoxMeyer strengthened the Company's position in the institutional marketplace. Similarly, the acquisition of General Medical further enhanced the Company's competitiveness, particularly in the fast- growing alternate-site segment.

MANUFACTURERS. Pharmaceutical and Retail Services develops innovative marketing and distribution services to build and sustain sales for manufacturers' pharmaceutical products. Through its HDS unit, this group operates integrated systems for specialized delivery of biotech and other high-cost pharmaceutical therapies. These systems manage manufacturer cost and information requirements through financial assistance programs for patients, reimbursement support and patient advocacy programs, product hot- lines, pharmacy-based sampling and physician and patient information programs. These services are also provided to manufacturers on a stand- alone basis outside of integrated service systems. Through McKesson Bioservices Corporation, this group also provides support services to commercial, non-profit and governmental organizations engaged in drug development and biomedical research including biological repository management, clinical trials support and regulatory process management services.

McKesson also provides a key service to drug manufacturers with McKesson Select GenericsSM, an enhancement of the Company's Multi-Source Complete(R) generic drug program which was launched in May 1996. Through the Select Generics program, retail customers have access to a broad line of approximately 1,350 generic items, and single suppliers are chosen for each item, thereby offering to manufacturers the advantage of exclusivity and compliance.

GENERAL MEDICAL ACQUISITION

On February 21, 1997, McKesson acquired General Medical for approximately $775 million, including $347 million for the equity, half in the Company's Common Stock and half in cash, and the assumption of approximately $428 million in debt. The acquisition of General Medical extends the Company's product line to include medical and surgical supplies in addition to the drugs and health and beauty care products it currently distributes. The combination of McKesson and General Medical creates a strong force to address the increasingly complex clinical supply needs of physicians, extended-care facilities and integrated health care networks.

General Medical is the nation's leading supplier of medical-surgical supplies to the full range of alternate-site health care facilities, including physicians and clinics (primary care), long-term care and home-care sites (extended care), and is the third largest distributor of medical-surgical supplies to hospitals.

FOXMEYER ACQUISITION

Prior to its acquisition by the Company, FoxMeyer's drug distribution business was the fourth largest in the United States. The acquisition of FoxMeyer pairs the Company's financial capabilities and information technology expertise with the substantial customer base of FoxMeyer and strengthens the Company's position in all three customer segments (health care institutions, retail independents and retail chains). The acquisition also gives the Company access to new customers and opportunities for consolidation economics, particularly cost reduction and distribution network reconfiguration.

MCKESSON WATER PRODUCTS COMPANY

McKesson Water Products Company ("Water Products") is a leading provider in the $3.4 billion bottled water industry in the United States. It is one of the largest bottled water companies in most of the geographic markets in which it competes. In fiscal 1997, Water Products generated $34.6 million in pretax operating profit, and its operating margin was 13%. Water Products is primarily engaged in the processing and sale of bottled drinking water delivered to more than 530,000 homes and businesses under its Sparkletts(R), Alhambra(R), and Crystal(TM) brands in California, Arizona, Nevada, Oklahoma, Washington, Texas and New Mexico. It also sells packaged water through retail stores.

14

USE OF PROCEEDS

The Company will not receive any cash proceeds from the issuance of the Exchange Notes offered hereby. In consideration for issuing the Exchange Notes as described in this Prospectus, the Company will receive tendered Private Notes in like principal amount, the terms of which are identical in all material respect to those of the Exchange Notes. The Private Notes surrendered in exchange for the Exchange Notes will be retired and cancelled and cannot be reissued. Accordingly, the issuance of the Exchange Notes will not result in any change in the indebtedness of the Company.

15

CAPITALIZATION OF MCKESSON

The following table sets forth short-term borrowings and the total capitalization of McKesson at March 31, 1997. The capitalization table should be read in conjunction with the consolidated financial statements of McKesson, and related notes thereto, which are incorporated by reference from the Form 10-K.

                                                          MARCH 31, 1997
                                                   -----------------------------
                                                          ACTUAL
                                                   ---------------------
                                                      ($ IN MILLIONS,
                                                   EXCEPT SHARE AMOUNTS)
Short-term borrowings............................        $   100.0
                                                         =========
Long-term debt and capital lease obligations
 (including current portion)(1):
  Term debt......................................        $   188.7
  Notes offered hereby...........................            525.0
  Exchangeable subordinated debentures...........            160.4
  Capital lease obligations (2)..................              4.2
  Other..........................................              6.9
                                                         ---------
    Total........................................            885.2
                                                         ---------
McKesson-obligated mandatorily redeemable
 preferred securities of subsidiary grantor trust
 whose sole assets are junior subordinated
 debentures of McKesson..........................            194.8
                                                         ---------
Stockholders' equity:
  Series Preferred stock, $.01 par value,
   100,000,000 shares authorized, no shares
   issued and outstanding........................              --
  Common stock, $.01 par value, 200,000,000
   shares authorized, 46,396,974 shares issued
   and outstanding...............................              0.4
  Additional paid-in capital.....................            408.2
  Other capital..................................            (19.2)
  Retained earnings..............................          1,062.6
  Accumulated translation adjustment.............            (44.6)
  ESOP notes and guarantee.......................           (118.3)
  Treasury common shares, 612,025 shares, at
   cost..........................................            (28.3)
                                                         ---------
    Total stockholders' equity...................          1,260.8
                                                         ---------
      Total Capitalization.......................        $ 2,340.8
                                                         =========


(1) For additional information on long-term debt, see Note 9 of the Financial Notes in the Form 10-K.

(2) For additional information on capital lease obligations and operating lease commitments, see Note 11 of the Financial Notes in the Form 10-K.

16

SELECTED CONSOLIDATED FINANCIAL INFORMATION
OF MCKESSON
(IN MILLIONS, EXCEPT PER SHARE AMOUNTS AND RATIOS)

The selected consolidated financial data of McKesson set forth below at March 31 and for the years then ended have been derived from McKesson's consolidated financial statements which are incorporated by reference from the Form 10-K.

                                         YEAR ENDED MARCH 31,
                             -----------------------------------------------------------
                               1997         1996      1995            1994        1993
                             ---------    --------  --------        --------    --------
INCOME STATEMENT DATA(1)
Revenues(2)................  $12,886.7    $9,953.7  $9,438.7        $8,520.8    $7,991.8
Costs and expenses
 Cost of sales(2)..........   11,849.4     9,038.2   8,630.5(3)      7,737.2     7,214.6
 Selling, distribution and
  administration...........      944.5(4)    674.2     817.2(3)        630.0(5)    620.7
 Interest..................       55.7        44.4      44.5            39.3        47.5
                             ---------    --------  --------        --------    --------
   Total...................   12,849.6     9,756.8   9,492.2         8,406.5     7,882.8
                             ---------    --------  --------        --------    --------
Income (loss) before income
 taxes and dividends on
 preferred securities of
 subsidiary trust..........       37.1       196.9     (53.5)(3)       114.3       109.0
Income taxes...............      (31.3)      (76.2)    (96.6)(6)       (45.0)      (42.2)
                             ---------    --------  --------        --------    --------
Income (loss) before
 dividends on preferred
 securities of subsidiary
 trust.....................        5.8       120.7    (150.1)           69.3        66.8
Dividends on preferred
 securities of subsidiary
 trust.....................       (0.7)
                             ---------    --------  --------        --------    --------
Income (loss) after taxes
 Continuing operations.....        5.1       120.7    (150.1)(3)(6)     69.3(5)     66.8
 Discontinued operations...        8.6        14.7     (23.1)           55.1        47.9
 Discontinued operations--
   Gain on sale/donation of
    Armor All stock(7).....      120.2                   1.0            32.7
   Gain on sale of PCS.....                            576.7
 Extraordinary item--debt
  extinguishment...........                                             (4.2)
 Cumulative effects of
  accounting changes.......                                            (16.7)
                             ---------    --------  --------        --------    --------
Net income (loss)..........  $   133.9    $  135.4  $  404.5        $  136.2    $  114.7
                             =========    ========  ========        ========    ========
Fully diluted earnings
 (loss) per common share
 Continuing operations.....  $    0.13    $   2.59  $  (3.34)       $   1.49    $   1.44
 Discontinued operations...       0.19        0.31     (0.51)           1.25        1.07
 Discontinued operations--
   Gain on sale/donation of
    Armor All stock........       2.66                  0.02            0.74
   Gain on sale of PCS.....                            12.69
 Extraordinary item--debt
  extinguishment...........                                            (0.10)
 Cumulative effects of
  accounting changes.......                                            (0.38)
                             ---------    --------  --------        --------    --------
   Total...................  $    2.98    $   2.90  $   8.86        $   3.00    $   2.51
                             =========    ========  ========        ========    ========
Fully diluted shares.......       45.1        46.7      45.5            44.1        44.8
Primary earnings (loss) per
 common share
 Continuing operations.....  $    0.12    $   2.59  $  (3.52)       $   1.53    $   1.49
 Discontinued operations...       0.19        0.31     (0.53)           1.35        1.20
 Discontinued operations--
   Gain on sale/donation of
    Armor All stock........       2.70                  0.02            0.80
   Gain on sale of PCS.....                            13.23
 Extraordinary item--debt
  extinguishment...........                                            (0.10)
 Cumulative effects of
  accounting changes.......                                            (0.41)
                             ---------    --------  --------        --------    --------
   Total...................  $    3.01    $   2.90  $   9.20        $   3.17    $   2.69
                             =========    ========  ========        ========    ========
Primary shares.............       44.5        46.6      43.6            40.8        40.0
Cash dividends declared per
 common share..............  $    1.00    $   1.00  $   1.34        $   1.66    $   1.60
Ratio of earnings to fixed
 charges (8)...............       1.55x       4.71x    (0.01x)          3.42x       2.97x

17

                                                  MARCH 31,
                                 -----------------------------------------------
                                   1997        1996     1995      1994    1993
                                 --------    -------- --------- -------- -------
BALANCE SHEET DATA (1)
Cash and cash equivalents....... $  124.8(9) $  260.8 $   363.1 $   62.7 $  77.5
Working capital.................  1,123.9       820.5     879.0    301.4   191.4
Total assets....................  5,172.8     3,360.2   3,260.2  2,676.6 2,458.4
Total debt (10).................    985.2       398.3     425.1    499.0   397.6
Stockholders' equity............  1,260.8     1,064.6   1,013.5    678.6   619.4


(1) Restated to reflect the Armor All and Millbrook subsidiaries as discontinued operations.

(2) Reflects the reclassification of sales and cost of sales associated with sales to customers' warehouses to include only the gross margin on such sales in revenues.

(3) Includes $59.4 million in compensation costs (classified in administration expense) related to the sale of PCS, Inc. and $139.5 million in charges for asset impairment, restructuring and other operating items ($35.9 million included in cost of sales and $103.6 million included in administration expense) resulting from the initiation of measures designed to streamline operations and improve productivity in the Company's Health Care Services and Water Products businesses (total of $130.6 million after-tax).

(4) Includes pre-tax charges of $147.0 million ($109.5 million after-tax), including $67.4 million in costs primarily associated with the integration and rationalization of McKesson's distribution operations, systems, program offerings and administrative functions related to the FoxMeyer Acquisition and $24.4 million for receivable reserves and other operating items. In addition, the $147.0 million charge includes $48.2 million for the write-off of in-process technology related to the acquisition of Automated Healthcare, Inc. and a write-down of $7.0 million for certain assets of the Aqua-Vend unit of the McKesson Water Products segment.

(5) Includes $13.4 million ($8.2 million after-tax) for the termination of interest rate swap arrangements.

(6) Includes $107.0 million of income tax expense related to the sale of PCS.

(7) Includes $1.0 million and $0.4 million of income from the contribution of 350,000 and 250,000 shares of Armor All common stock to the McKesson Foundation in fiscal 1995 and 1994, respectively, $32.3 million from the sale of 5,175,000 shares of Armor All common stock to the public in fiscal 1994 and $120.2 million from the sale of the remaining 11,625,000 Armor All shares to The Clorox Company in December 1996.

(8) The ratio of earnings to fixed charges was computed by dividing fixed charges (interest expense including the interest portion of capital and operating leases) into earnings available for fixed charges (income from continuing operations plus taxes on income and fixed charges). The deficiency of earnings to fixed charges for fiscal 1995 totaled $0.7 million. The ratios of earnings to fixed charges excluding the charges described in Notes 3, 4 and 5 would have been 3.75x for fiscal 1997, 4.71x for fiscal 1996, 3.75x for fiscal 1995, 3.70x for fiscal 1994 and 2.97x for fiscal 1993.

(9) Includes $13.2 million of after-tax proceeds from the sale of Armor All shares which were placed in a trust as exchange property for McKesson's exchangeable debentures.

(10) Total debt includes all interest-bearing debt of McKesson and consolidated subsidiaries, including the current portion and capital lease obligations. Amounts related to deferred compensation have been reclassified as other current and non-current liabilities.

18

THE EXCHANGE OFFERS

PURPOSE OF THE EXCHANGE OFFERS

The Private Notes were sold by the Company on the Closing Date to the Initial Purchasers, pursuant to a Placement Agreement entered into by the Company and the Initial Purchasers on March 6, 1997 (the "Placement Agreement"). The Initial Purchasers subsequently sold the Private Notes to QIBs in reliance on Rule 144A. As a condition to the sale of the Private Notes, the Company and the Initial Purchasers entered into the Registration Rights Agreement on March 11, 1997 (the "Registration Rights Agreement"). Pursuant to the Registration Rights Agreement, the Company agreed that, unless the Exchange Offers are not permitted by applicable law or Commission policy, it would file with the Commission a registration statement under the Securities Act with respect to the Exchange Notes within 120 days after the Closing Date and use its reasonable best efforts to cause such registration statement to become effective under the Securities Act within 180 days after the Closing Date. A copy of the Registration Rights Agreement has been filed as an exhibit to the Registration Statement. The Registration Statement is intended to satisfy certain of the Company's obligations under the Registration Rights Agreement and the Placement Agreement.

TERMS OF THE EXCHANGE OFFERS

Promptly after the Registration Statement has been declared effective, the Company will offer Exchange Notes in exchange for surrender of the corresponding Private Notes. The Company will keep the Exchange Offers open for not less than 30 calendar days (or longer if required by applicable law) after the date on which notice of the Exchange Offers is mailed to the holders of the Private Notes. For each Private Note validly tendered to the Company pursuant to the Exchange Offers and not withdrawn by the Holder thereof, the Holder of such Private Note will receive a corresponding Exchange Note having a principal amount equal to the principal amount of such surrendered Private Note. The Exchange Notes will bear interest from the most recent date to which interest has been paid on the applicable Private Notes or, if no interest has been paid, from March 1, 1997. Accordingly, if the relevant record date for interest payment occurs after the consummation of the applicable Exchange Offer registered holders of such Exchange Notes on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. If, however, the relevant record date for interest payment occurs prior to the consummation of the applicable Exchange Offer registered holders of such Private Notes on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. Holders of Private Notes whose Private Notes are accepted for exchange will not receive any payment in respect of accrued interest on such Private Notes otherwise payable on any interest payment date the record date for which occurs on or after consummation of the Exchange Offers. The Exchange Notes evidence the same debt as the corresponding Private Notes and are issued under and are entitled to the same benefits under the Indenture as the Private Notes.

In the event that (i) the Registration Statement is not filed on or prior to the 120th day following the Closing Date, (ii) the Registration Statement is not declared effective by the Commission on or prior to the 180th day following the Closing Date, (iii) the Registration Statement becomes effective, and the Company fails to consummate any of the Exchange Offers on or prior to the 225th day following the Closing Date, (iv) the Shelf Registration Statement (as defined herein) is not declared effective on or prior to the 225th day following the Closing Date or (v) the Shelf Registration Statement with respect to the Private Notes is declared effective but thereafter ceases to be effective or usable under certain circumstances in connection with resales of Private Notes for the period specified in the Registration Rights Agreement (each such event referred to in clauses (i) through (v) above a "Registration Default"), then the Company will pay to each Holder of any applicable Private Notes, accruing from and including the next day following such Registration Default (or if such Registration Default has been cured, from and including the next day following the next Registration Default), liquidated damages in an amount equal to 0.25% per annum of the principal amount of the Private Notes held by such Holder, which provision for liquidated damages will continue until such Registration Default has been cured. Any amounts of Liquidated Damages due pursuant to the foregoing paragraphs will be payable in cash on March 1 and September 1 of each year to the holders of record on the preceding February 15 and August 15, respectively.

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PERIOD FOR TENDERING PRIVATE NOTES

Upon the terms and subject to the conditions set forth in this Prospectus and in the accompanying applicable Letter of Transmittal (which together constitute the Exchange Offers), the Company will accept for exchange Private Notes which are properly tendered on or prior to the Expiration Date and not withdrawn as permitted below. As used herein, the term "Expiration Date" means 5:00 p.m., New York City time, on , 1997; provided, however, that if the Company, in its sole discretion, has extended the period of time for which any of the Exchange Offers are open, the term "Expiration Date" means the latest time and date to which the applicable Exchange Offer is extended.

As of the date of this Prospectus, $175,000,000 aggregate principal amount of the Private Notes due 2000, $175,000,000 aggregate principal amount of the Private Notes due 2002 and $175,000,000 aggregate principal amount of the Private Debentures due 2027 are outstanding. This Prospectus, together with the applicable Letter of Transmittal, is first being sent on or about , 1997, to all holders of Private Notes known to the Company. The Company's obligation to accept Private Notes for exchange pursuant to the Exchange Offers are subject to certain conditions as set forth below under "--Certain Conditions to the Exchange Offers."

The Company expressly reserves the right, at any time or from time to time, to extend the period of time during which any of the Exchange Offers are open, and thereby delay acceptance for exchange of any Private Notes, by giving oral or written notice of such extension to the Holders thereof as described below. During any such extension, all Private Notes previously tendered will remain subject to the Exchange Offers and may be accepted for exchange by the Company. Any Private Notes not accepted for exchange for any reason will be returned without expense to the tendering Holder thereof as promptly as practicable after the expiration or termination of the applicable Exchange Offer.

Private Notes tendered in the Exchange Offers must be in integral multiples of $1,000.

The Company expressly reserves the right to amend or terminate any or all of the Exchange Offers, and not to accept for exchange any Private Notes not therefore accepted for exchange, upon the occurrence of any of the events specified below under "--Certain Conditions to the Exchange Offers." The Company will give oral or written notice of any extension, amendment, non- acceptance or termination to the Holders of the Private Notes as promptly as practicable, such notice in the case of any extension to be issued by means of a press release or other public announcement no later than 9:00 a.m., New York City time, on the next business day after the previously scheduled Expiration Date.

PROCEDURES FOR TENDERING PRIVATE NOTES

The tender to the Company of Private Notes by a Holder thereof as set forth below and the acceptance thereof by the Company will constitute a binding agreement between the tendering Holder and the Company upon the terms and subject to the conditions set forth in this Prospectus and in the accompanying applicable Letter of Transmittal.

Book-Entry Transfer. For purposes of the Exchange Offers, the Exchange Agent will establish an account with respect to the Private Notes at DTC within two business days after the date of this Prospectus. Any tendering financial institution that is a participant in DTC's book-entry transfer facility system must make a book-entry delivery of the Private Notes by causing DTC to transfer such Private Notes into the Exchange Agent's account at DTC in accordance with DTC's ATOP procedure for transfers. Such holder of Private Notes using ATOP should transmit its acceptance to DTC on or prior to the Expiration Date (or comply with the guaranteed delivery procedures set forth below). DTC will verify such acceptance, execute a book-entry transfer of the tendered Private Notes into the Exchange Agent's account at DTC and then send to the Exchange Agent confirmation of such book-entry transfer, including an agent's message confirming that DTC has received an express acknowledgment from such holder that such holder has received and agrees to be bound by the applicable Letter of Transmittal and that the Company may enforce the applicable Letter of Transmittal against such holder (a "Book-Entry Confirmation").

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A beneficial owner of Private Notes that are held by or registered in the name of a broker, dealer, commercial bank, trust company or other nominee or custodian is urged to contact such entity promptly if such beneficial owner wishes to participate in the Exchange Offers.

Certificates. If the tender is not made through ATOP, certificates representing Private Notes, as well as the applicable Letter of Transmittal (or facsimile thereof), properly completed and duly executed, with any required signature guarantees, and any other documents required by the applicable Letter of Transmittal, must be received by the Exchange Agent at its address set forth under "--Exchange Agent" on or prior to the Expiration Date in order for such tender to be effective (or the guaranteed delivery procedures set forth below must be complied with).

If less than all of the Private Notes are tendered, a tendering holder should fill in the amount of Private Notes being tendered in the appropriate box on the applicable Letter of Transmittal. The entire amount of Private Notes delivered to the Exchange Agent will be deemed to have been tendered unless otherwise indicated.

THE METHOD OF DELIVERY OF PRIVATE NOTES, LETTERS OF TRANSMITTAL AND ALL OTHER REQUIRED DOCUMENTS IS AT THE ELECTION AND RISK OF THE HOLDERS. IF SUCH DELIVERY IS BY MAIL, IT IS RECOMMENDED THAT REGISTERED MAIL, PROPERLY INSURED, WITH RETURN RECEIPT REQUESTED, BE USED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ASSURE TIMELY DELIVERY. NO LETTERS OF TRANSMITTAL OR PRIVATE NOTES SHOULD BE SENT TO THE COMPANY.

Signature Guarantees. Signatures on a Letter of Transmittal or a notice of withdrawal, as the case may be, must be guaranteed unless the Private Notes surrendered for exchange pursuant thereto are tendered (i) by a registered holder of the Private Notes who has not completed the box entitled "Special Issuance Instructions" or "Special Delivery Instructions" on such Letter of Transmittal or (ii) for the account of an Eligible Institution (as defined herein). In the event that signatures on a Letter of Transmittal or a notice of withdrawal, as the case may be, are required to be guaranteed, such guarantees must be by a firm which is a member of a registered national securities exchange or a member of the National Association of Securities Dealers, Inc. or by a commercial bank or trust company having an office or correspondent in the United States (collectively, "Eligible Institutions"). If Private Notes are registered in the name of a person other than a signer of a Letter of Transmittal, the Private Notes surrendered for exchange must be endorsed by, or be accompanied by a written instrument or instruments of transfer or exchange, in satisfactory form as determined by the Company in its sole discretion, duly executed by, the registered Holder with the signature thereon guaranteed by an Eligible Institution.

Determination of Validity. All questions as to the validity, form, eligibility (including time of receipt) and acceptance of Private Notes tendered for exchange will be determined by the Company in its sole discretion, which determination shall be final and binding. The Company reserves the absolute right to reject any and all tenders of any particular Private Notes not properly tendered or to not accept any particular Private Notes which acceptance might, in the judgment of the Company or its counsel, be unlawful. The Company also reserves the absolute right to waive any defects or irregularities or conditions of the Exchange Offers as to any particular Private Notes either before or after the Expiration Date (including the right to waive the ineligibility of any Holder who seeks to tender Private Notes in the Exchange Offers). The interpretation of the terms and conditions of the Exchange Offers as to any particular Private Notes either before or after the Expiration Date (including the applicable Letter of Transmittal and the instructions thereto) by the Company shall be final and binding on all parties. Unless waived, any defects or irregularities in connection with tenders of Private Notes for exchange must be cured within such reasonable period of time as the Company shall determine. Neither the Company, the Exchange Agent nor any other person shall be under any duty to give notification of any defect or irregularity with respect to any tender of Private Notes for exchange, nor shall any of them incur any liability for failure to give such notification.

If a Letter of Transmittal is signed by a person or persons other than the registered holder or holders of Private Notes, such Private Notes must be endorsed or accompanied by appropriate powers of attorney, in either case signed exactly as the name or names of the registered holder or holders that appear on the Private Notes.

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If a Letter of Transmittal or any Private Notes or powers of attorney are signed by trustees, executors, administrators, guardians, attorneys-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, such persons should so indicate when signing, and, unless waived by the Company, proper evidence satisfactory to the Company of their authority to so act must be submitted.

By tendering, each Holder of the Private Notes will represent to the Company that, among other things, (i) it is not an affiliate of the Company, (ii) the Exchange Notes to be received by it were acquired in the ordinary course of its business and (iii) at the time of the Exchange Offers, it has no arrangement with any person to participate in the distribution of the Exchange Notes. If any Holder is an affiliate of the Company or intends to participate in the Exchange Offers for the purpose of distributing the Exchange Notes, or any broker-dealer who purchased the Private Notes from the Company to resell pursuant to Rule 144A or any other available exemption under the Securities Act, (i) will not be able to rely on the interpretations of the Staff set forth in the above-mentioned no-action letters, (ii) will not be entitled to tender its Private Notes in the Exchange Offers and (iii) must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any sale or transfer of the Private Notes unless such sale or transfer is made pursuant to an exemption from such requirements. Each broker- dealer that receives Exchange Notes for its own account in exchange for Private Notes, where such Private Notes were acquired by such broker-dealer as a result of market-making activities or other trading activities, must acknowledge that it will deliver a Prospectus in connection with any resale of such Exchange Notes. See "Plan of Distribution." Each Letter of Transmittal states that by so acknowledging and by delivering a prospectus, a broker- dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

ACCEPTANCE OF PRIVATE NOTES FOR EXCHANGE; DELIVERY OF EXCHANGE NOTES

Upon satisfaction or waiver of all of the conditions to the applicable Exchange Offers, the Company will accept, promptly after the applicable Expiration Date, all applicable Private Notes properly tendered and will issue the applicable Exchange Notes promptly after acceptance of such Private Notes. See "--Certain Conditions to the Exchange Offers." For purposes of the Exchange Offers, the Company shall be deemed to have accepted properly tendered Private Notes for exchange when, as and if the Company has given oral or written notice thereof to the Exchange Agent, with written confirmation of any oral notice to be given promptly thereafter.

In all cases, issuance of Exchange Notes for Private Notes that are accepted for exchange pursuant to the Exchange Offers will be made only after timely receipt by the Exchange Agent of (i) a Book-Entry Confirmation with respect to such Private Notes or (ii) certificates for such Private Notes and a properly completed and duly executed applicable Letter of Transmittal (or facsimile thereof), with any required signature guarantees and all other required documents. If any tendered Private Notes are not accepted for any reason set forth in the terms and conditions of the Exchange Offers or if Private Notes are submitted for a greater principal amount than the holder desired to exchange, such unaccepted or non-exchanged Private Notes will be returned without expense to the tendering holder thereof (or, in the case of Private Notes tendered by book-entry transfer into the Exchange Agent's account at DTC pursuant to the book-entry procedures described above, such non-exchanged Private Notes will be credited to an account maintained with DTC) as promptly as practicable after the expiration or termination of the applicable Exchange Offer.

GUARANTEED DELIVERY PROCEDURES

If a registered holder of the Private Notes desires to tender such Private Notes and the Private Notes are not immediately available, or time will not permit such holder's Private Notes or other required documents to reach the Exchange Agent before the applicable Expiration Date, or the procedure for book-entry transfer cannot be completed on a timely basis, a tender may be effected if (i) the tender is made by or through an Eligible Institution, (ii) prior to the applicable Expiration Date, the Exchange Agent receives from such Eligible Institution a properly completed and duly executed Notice of Guaranteed Delivery, substantially in the form provided by the Company (by telegram, telex, facsimile transmission, mail or hand delivery), setting forth the name and address of the holder of Private Notes and the amount of Private Notes tendered, stating that the tender

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is being made thereby and guaranteeing that within three NYSE trading days after the date of execution of the Notice of Guaranteed Delivery, the certificates for all physically tendered Private Notes, in proper form for transfer, or a Book-Entry Confirmation, as the case may be, and any other documents required by the applicable Letter of Transmittal will be deposited by the Eligible Institution with the Exchange Agent, and (iii) (a) a Book- Entry Confirmation or (b) the certificates for all physically tendered Private Notes, in proper form for transfer, and a duly executed applicable Letter of Transmittal (or facsimile thereof) with any required signature guarantees, and all other documents required by such Letter of Transmittal, are received by the Exchange Agent within three NYSE trading days after the date of execution of the Notice of Guaranteed Delivery.

WITHDRAWAL RIGHTS

Tenders of Private Notes may be withdrawn at any time prior to the applicable Expiration Date.

For a withdrawal to be effective, a written notice of withdrawal must be received by telegram, facsimile transaction (receipt confirmed by telephone) or letter to the Exchange Agent at its address as set forth below under "-- Exchange Agent" on or prior to the applicable Expiration Date. Any such notice of withdrawal must specify the name of the person having tendered the Private Notes to be withdrawn, identify the Private Notes to be withdrawn (including the series and the principal amount of such Private Notes), and (where certificates for Private Notes have been transmitted) specify the name in which such Private Notes are registered, if different from that of the withdrawing holder. If certificates for Private Notes have been delivered or otherwise identified to the Exchange Agent, then, prior to the release of such certificates the withdrawing holder must also submit the certificate numbers of the particular certificates to be withdrawn and signed notice of withdrawal with signatures guaranteed by an Eligible Institution unless such holder is an Eligible Institution. If Private Notes have been tendered pursuant to the procedure for book entry transfer described above, any notice of withdrawal must specify the name and number of the account at DTC to be credited with the withdrawn Private Notes and otherwise comply with the procedures of such facility. All questions as to the validity, form and eligibility (including time of receipt) of such notices will be determined by the Company, whose determination shall be final and binding on all parties. Any Private Notes so withdrawn will be deemed not to have been validly tendered for exchange for purposes of the Exchange Offers. Any Private Notes which have been tendered for exchange but which are not exchanged for any reason will be returned to the Holder thereof without cost to such Holder (or, in the case of Private Notes tendered by book-entry transfer into the Exchange Agent's account at DTC pursuant to the book-entry transfer procedures described above, such Private Notes will be credited to an account maintained with DTC for the Private Notes) as soon as practicable after withdrawal, rejection of tender or termination of the applicable Exchange Offer. Properly withdrawn Private Notes may be retendered by following one of the procedures described under "-- Procedures for Tendering Private Notes" above at any time on or prior to the applicable Expiration Date.

CERTAIN CONDITIONS TO THE EXCHANGE OFFERS

Notwithstanding any other provision of the applicable Exchange Offer, the Company shall not be required to accept for exchange, or to issue Exchange Notes in exchange for, any applicable Private Notes and may terminate or amend the applicable Exchange Offer, if at any time before the acceptance of such Private Notes for exchange or the exchange of the applicable Exchange Notes for such Private Notes, any of the following events shall occur:

(a) there shall be threatened, instituted or pending any action or proceeding before, or any injunction, order of decree shall have been issued by, any court or governmental agency or other governmental regulatory or administrative agency or commission with respect to the applicable Exchange Offer; or

(b) such acceptance or issuance would violate applicable law or any applicable interpretation of the Staff of the Commission; or

(c) there shall have occurred (i) any general suspension of or general limitation on prices for, or trading in, securities on any national securities exchange or in the over-the-counter market, (ii) any limitation by any governmental agency or authority which may adversely affect the ability of the Company to complete the transactions contemplated by any of the Exchange Offers, (iii) a declaration of a banking moratorium or

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any suspension of payments in respect of banks in the United States or any limitation by any governmental agency or authority which adversely affects the extension of credit or (iv) a commencement of a war, armed hostilities or other similar international calamity directly or indirectly involving the United States, or, in the case of any of the foregoing existing at the time of the commencement of the Exchange Offers, a material acceleration or worsening thereof; or

(d) any change (or any development involving a prospective change) shall have occurred or be threatened in the business, properties, assets, liabilities, financial condition, operations, results of operations or prospects of the Company and its subsidiaries taken as a whole that, in the sole judgment of the Company, is or may be adverse to the Company, or the Company shall have become aware of facts that, in the sole judgment of the Company, have or may have adverse significance with respect to the value of any of the Private Notes or the Exchange Notes;

which in the sole judgment of the Company in any case, and regardless of the circumstances (including any action by the Company) giving rise to any event described above, prohibits the Company from or makes it inadvisable for the Company to proceed with any of the Exchange Offers and/or with such acceptance for exchange or with such exchange.

The foregoing conditions are for the sole benefit of the Company and may be asserted by the Company regardless of the circumstances giving rise to any such condition or may be waived by the Company in whole or in part at any time and from time to time in its sole discretion. The failure by the Company at any time to exercise any of the foregoing rights shall not be deemed a waiver of any such right and each such right shall be deemed an ongoing right which may be asserted at any time and from time to time.

In addition, the Company will not accept for exchange any Private Notes tendered, and no Exchange Notes will be issued in exchange for any such Private Notes, if at such time any stop order shall be threatened or in effect with respect to the Registration Statement or the qualification of the Indenture under the Trust Indenture Act of 1939, as amended (the "TIA").

EXCHANGE AGENT

The First National Bank of Chicago has been appointed as the Exchange Agent for the Exchange Offers. All executed Letters of Transmittal should be directed to the Exchange Agent as set forth below. Questions and requests for assistance, requests for additional copies of this Prospectus or of the applicable Letter of Transmittal and requests for Notices of Guaranteed Delivery should be directed to the Exchange Agent addressed as follows:

             By Mail:                     By Hand or Overnight Delivery:

  (Registered or Certified Mail
           recommended)

The First National Bank of Chicago      The First National Bank of Chicago
     c/o First Chicago Trust                 c/o First Chicago Trust
       Company of New York                     Company of New York
          14 Wall Street                          14 Wall Street
       8th Floor, Window 2                     8th Floor, Window 2
     New York, New York 10005                New York, New York 10005

Facsimile Transmissions:

(Eligible Institutions Only)

(212) 240-8938

To Confirm by Telephone
or for Information Call:

(212) 240-8801

DELIVERY OF LETTERS OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE OTHER THAN AS SET FORTH ABOVE DOES NOT CONSTITUTE A VALID DELIVERY.

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FEES AND EXPENSES

The Company will not make any payment to brokers, dealers, or others soliciting acceptances of the Exchange Offers.

The Company will pay certain other expenses to be incurred in connection with the Exchange Offers, including the fees and expenses of the Exchange Agent, accounting and certain legal fees.

TRANSFER TAXES

Holders who tender their Private Notes for exchange will not be obligated to pay any transfer taxes in connection therewith, except that Holders who instruct the Company to register Exchange Notes in the name of, or request that Private Notes not tendered or not accepted in the Exchange Offers be returned to, a person other than the registered tendering Holder will be responsible for the payment of any applicable transfer tax thereon.

CONSEQUENCES OF FAILURE TO EXCHANGE

Holders of Private Notes who do not exchange their Private Notes for the corresponding Exchange Notes pursuant to the Exchange Offers will continue to be subject to the provisions in the Indenture regarding transfer and exchange of the Private Notes and the restrictions on transfer of such Private Notes as set forth in the legend thereon as a consequence of the issuance of the Private Notes pursuant to exemptions from, or in transactions not subject to, the registration requirements of the Securities Act and applicable state securities laws. In general, the Private Notes may not be offered or sold, unless registered under the Securities Act, except pursuant to an exemption from, or in a transaction not subject to, the Securities Act and applicable state securities laws. The Company does not currently anticipate that it will register Private Notes under the Securities Act. See "Description of the Notes--Registration Rights." To the extent that Private Notes are tendered and accepted in the Exchange Offers, the trading market for the remaining untendered Private Notes could be adversely affected. Issuance of the Exchange Notes in exchange for Private Notes pursuant to the Exchange Offers will be made only after timely receipt by the Exchange Agent of (i) a Book-Entry Confirmation with respect to such Private Notes or (ii) certificates for such Private Notes and a properly completed and duly executed applicable Letter of Transmittal (or facsimile thereof), with any required signature guarantees and all other required documents. Therefore, Holders of the Private Notes desiring to tender such Private Notes in exchange for corresponding Exchange Notes should allow sufficient time to ensure timely delivery. The Company is under no duty to give notification of defects or irregularities with respect to tenders of Private Notes for exchange. Private Notes that are not tendered or that are tendered but not accepted by the Company for exchange will, following consummation of the applicable Exchange Offer, continue to be subject to the existing restrictions upon transfer thereof under the Securities Act and, upon consummation of the applicable Exchange Offer, certain registration rights under the Registration Rights Agreement will terminate.

Based on existing interpretations by the Staff, as set forth in several no- action letters to third parties, and subject to the immediately following sentence, the Company believes that Exchange Notes issued pursuant to the Exchange Offers in exchange for Private Notes may be offered for resale, resold and otherwise transferred by the holders thereof (other than holders who are broker-dealers) without further compliance with the registration and prospectus delivery provisions of the Securities Act. However, any purchaser of Private Notes who is an affiliate of the Company or who intends to participate in the Exchange Offers for the purpose of distributing the Exchange Notes, or any broker-dealer who purchased the Private Notes from the Company to resell pursuant to Rule 144A or any other available exemption under the Securities Act, (i) will not be able to rely on the interpretations of the Staff set forth in the above-mentioned no-action letters, (ii) will not be entitled to tender its Private Notes in the Exchange Offers and (iii) must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any sale or transfer of the Private Notes unless such sale or transfer is made pursuant to an exemption from such requirements. The Company does not intend to request the Commission to consider, and the Commission has not considered, the Exchange Offers in the context of a no-action letter and there can be no assurance that the Staff would make a similar determination with respect to the Exchange Offers as in such other circumstances.

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Each Holder of the Private Notes who wishes to exchange the Private Notes for Exchange Notes in the Exchange Offers will be required to represent that
(i) it is not an affiliate of the Company, (ii) the Exchange Notes to be received by it were acquired in the ordinary course of its business and (iii) at the time of the Exchange Offers, it has no arrangement with any person to participate in the distribution of the Exchange Notes. Each broker-dealer that receives Exchange Notes for its own account in exchange for Private Notes, where such Private Notes were acquired by such broker-dealer as a result of market-making activities or other trading activities, must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Notes. See "Plan of Distribution."

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DESCRIPTION OF NOTES

The Private Notes were issued and the Exchange Notes will be issued pursuant to an Indenture, dated as of March 11, 1997 (the "Indenture") between the Company and The First National Bank of Chicago, as trustee (the "Trustee"), a copy of which is filed as an exhibit to the Registration Statement of which this Prospectus constitutes a part. Upon the effectiveness of the Registration Statement, the Indenture will be subject to and governed by the TIA. The Private Notes and the Exchange Notes are treated as three series of Notes under the Indenture and holders thereof are entitled to the benefit of the Indenture. Accordingly, unless specifically stated to the contrary, the following description applies equally to all Notes. The following summary of certain provisions of the Indenture and the Notes does not purport to be complete and such summary is subject to the detailed provisions of the Indenture to which reference is hereby made for a full description of such provisions, including the definition of certain terms used herein, and for other information regarding the Notes. Wherever particular sections or defined terms of the Indenture are referred to, such sections or defined terms are incorporated herein by reference as part of the statement made, and the statement is qualified in its entirety by such reference. As used under this caption, the term "Company" means McKesson Corporation and not any of its subsidiaries unless otherwise expressly stated or the context otherwise requires. The forms and terms of the Exchange Notes and the corresponding Private Notes are identical in all material respects, except for certain transfer restrictions and registration rights relating to the Private Notes and except that Holders of Private Notes of Exchange Offers that have not been consummated by October 22, 1997 will be entitled to liquidated damages in an amount equal to 0.25% per annum on the Private Notes held by such Holders. Liquidated damages, if any, will accrue from and including October 23, 1997 and will cease to accrue from the consummation of the applicable Exchange Offer.

GENERAL

The Exchange Notes due 2000 will be unsecured, unsubordinated obligations of the Company limited in aggregate principal amount to $175 million and will mature on March 1, 2000. The Exchange Notes due 2002 will be unsecured, unsubordinated obligations of the Company limited in aggregate principal amount to $175 million and will mature on March 1, 2002. The Exchange Debentures due 2027 will be unsecured, unsubordinated obligations of the Company limited in aggregate principal amount to $175 million and will mature on March 1, 2027.

Payment of the principal of and interest on the Exchange Notes will rank pari passu with all other unsecured, unsubordinated debt of the Company. The Exchange Notes due 2000 and the Exchange Notes due 2002 will not be redeemable prior to maturity and the Exchange Debentures due 2027 will be redeemable in whole or in part at any time at the option of the Company. See "--Optional Redemption." The Exchange Notes will not be entitled to the benefit of any mandatory redemption or sinking fund. The Indenture does not limit the amount of additional indebtedness the Company or any of its subsidiaries may incur. The Indenture does not limit the amount of notes, debentures or other evidences of indebtedness ("Debt Securities") that the Company may issue thereunder and provides that Debt Securities may be issued from time to time in one or more series. As of the date of this Prospectus, no Debt Securities other than the Private Notes are outstanding under the Indenture.

The Exchange Notes will bear interest from March 1, 1997 at the respective rates per annum set forth on the cover page of this Prospectus and such interest will be payable semiannually in arrears on March 1 and September 1 of each year, commencing on September 1, 1997, to the persons in whose names the Exchange Notes are registered at the close of business on the immediately preceding February 15 and August 15, respectively. Interest on the Exchange Notes will accrue from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. Principal of, premium, if any, and interest on the Exchange Notes will be payable, and the transfer of Exchange Notes will be registrable, at the office or agency of the Company to be maintained for such purpose in the Borough of Manhattan, The City of New York, except that, at the option of the Company, interest may be paid by mailing a check to the address of the person entitled thereto as it appears on the Exchange Notes register. Exchange Notes may be presented for exchange at the corporate trust offices of the Trustee. Such services will be provided without charge, other than any tax or other governmental charge payable in connection therewith, but subject to the limitations provided in the Indenture.

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Interest on the Exchange Notes will be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which principal, premium, if any, or interest is payable on the Exchange Notes is not a Business Day (as defined in the Indenture), then payment of the principal, premium, if any, or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of any such delay). The Exchange Notes will be issued in integral multiples of $1,000.

For each Private Note accepted for exchange, the holder of such Private Note will receive a corresponding Exchange Note having a principal amount equal to that of the surrendered Private Note.

BOOK ENTRY; DELIVERY AND FORM

The certificates representing the Exchange Notes will be issued in fully registered form. Except as set forth below, the Exchange Notes will be deposited with, or on behalf of, DTC, and registered in the name of Cede & Co. ("Cede"), as DTC's nominee in the form of one or more global Exchange Note certificates (the "Global Securities") for each of the Exchange Notes due 2000, the Exchange Notes due 2002 and the Exchange Debentures due 2027, respectively.

Except as set forth below, the record ownership of any Global Security may be transferred, in whole or in part, only to DTC, another nominee of DTC or to a successor of DTC or its nominee. Investors may hold their interests in any of the Global Securities directly through DTC, or indirectly through organizations which are participants in DTC ("Participants"). Transfers between Participants will be effected in the ordinary way in accordance with DTC rules and will be settled in immediately available funds.

Investors who are not Participants may beneficially own interests in a Global Security held by DTC only through Participants, including certain banks, brokers, dealers, trust companies and other parties that clear through or maintain a custodial relationship with a Participant, either directly or indirectly, and have indirect access to the DTC system ("Indirect Participants"). So long as Cede, as the nominee of DTC, is the registered owner of any Global Security, Cede for all purposes will be considered the sole holder of such Global Security. Except as provided below, owners of beneficial interests in a Global Security will not be entitled to have certificates registered in their names, will not receive or be entitled to receive physical delivery of certificates in definitive form, and will not be considered the holder thereof.

Neither McKesson nor the Trustee (nor any registrar or paying agent) will have any responsibility for the performance by DTC or its Participants or Indirect Participants of its obligations under the rules and procedures governing, its operations. DTC has advised McKesson that it will take any action permitted to be taken by a holder of Exchange Notes only at the direction of one or more Participants whose accounts are credited with DTC interests in a Global Security.

DTC has advised McKesson as follows: DTC is a limited purpose trust company organized under the laws of the State of New York, a "banking organization" within the meaning of the New York Banking Law, a member of the Federal Reserve System, a "clearing corporation" within the meaning of the New York Uniform Commercial Code and a "clearing agency" registered pursuant to the provisions of Section 17A of the Exchange Act. DTC was created to hold securities for its Participants and to facilitate the clearance and settlement of securities transactions, such as transfers and pledges, among Participants in deposited securities through electronic book-entry changes to accounts of its Participants, thereby eliminating the need for physical movement of securities certificates. Participants include securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations. Certain of such Participants (or their representatives), together with other entities, own DTC. The Rules applicable to DTC and its Participants are on file with the Commission.

Purchases of Exchange Notes under the DTC system must be made by or through Participants, which will receive a credit for the Exchange Notes on DTC's records. The ownership interest of each actual purchaser of

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each Exchange Note (a "Beneficial Owner") is in turn to be recorded on the Participants and Indirect Participants' records. Beneficial Owners will not receive written confirmation from DTC of their purchase, but Beneficial Owners are expected to receive written confirmations providing details of the transaction, as well as periodic statements of their holdings, from the Participant or Indirect Participant through which the Beneficial Owner entered into the transaction. Transfers of ownership interests in the Exchange Notes are to be accomplished by entries made on the books of Participants acting on behalf of Beneficial Owners. Beneficial Owners will not receive certificates representing their ownership interests in Exchange Notes, except in the event that use of the book-entry system for the Exchange Notes is discontinued.

The deposit of Exchange Notes with DTC and their registration in the name of Cede effect no change in beneficial ownership. DTC has no knowledge of the actual Beneficial Owners of the Exchange Notes; DTC's records reflect only the identity of the Participants to whose accounts such Exchange Notes are credited, which may or may not be the Beneficial Owners. The Participants will remain responsible for keeping account of their holdings on behalf of their customers.

The laws of some jurisdictions require that certain purchasers of securities take physical delivery of securities in definitive form. Such laws may impair the ability to transfer beneficial interests in each Global Security.

Conveyance of notices and other communications by DTC to Participants, by Participants to Indirect Participants and by Participants and Indirect Participants to Beneficial Owners will be governed by arrangements among them, subject to any statutory or regulatory requirements that may be in effect from time to time. Redemption notices shall be sent to Cede. If less than all of the Exchange Debentures due 2027 are being redeemed, DTC's practice is to determine by lot the interest of each Participant in the Exchange Debentures due 2027 to be redeemed.

Principal and interest payments on the Exchange Notes will be made to DTC by wire transfer of immediately available funds. DTC's practice is to credit Participants' accounts on the payable date in accordance with their respective holdings shown on DTC's records unless DTC has reason to believe that it will not receive payment on the payable date. Payments by Participants to Beneficial Owners will be governed by standing instructions and customary practices, as is the case with securities held for the accounts of customers in bearer form or registered in "street name," and will be the responsibility of such Participant and not of DTC or McKesson, subject to any statutory or regulatory requirements as may be in effect from time to time. Payment of principal and interest to DTC is the responsibility of McKesson, disbursement of such payments to Participants shall be the responsibility of DTC, and disbursement of such payments to the Beneficial Owners shall be the responsibility of Participants and Indirect Participants. Neither McKesson nor the Trustee will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interests in the Global Securities or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests.

Certificated Notes. DTC may discontinue providing its services as securities depositary with respect to the Exchange Notes at any time by giving reasonable notice to McKesson. In the event that DTC notifies McKesson that it is unwilling or unable to continue as depositary for any Global Security or if at any time DTC ceases to be a clearing agency registered as such under the Exchange Act when DTC is required to be so registered to act as such depositary and no successor depositary shall have been appointed within 90 days of such notification or of McKesson becoming aware of DTC's ceasing to be so registered, as the case may be, certificates for the relevant Exchange Notes will be printed and delivered in exchange for interests in such Global Security. Any Global Security that is exchangeable pursuant to the preceding sentence shall be exchangeable for relevant Exchange Notes registered in such names as DTC shall direct. It is expected that such instructions will be based upon directions received by DTC from its Participants with respect to ownership of beneficial interests in such Global Security.

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McKesson may decide to discontinue use of the system of book-entry transfers through DTC (or a successor securities depository). In that event, certificates representing the Exchange Notes will be printed and delivered.

The information in this section concerning DTC and DTC's book-entry system has been obtained from sources that McKesson believes to be reliable, but McKesson does not take responsibility for the accuracy thereof.

OPTIONAL REDEMPTION

The Debentures due 2027 will be redeemable as a whole or in part, at the option of the Company, at any time at a redemption price equal to the greater of (i) 100% of their principal amount or (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Yield plus 12.5 basis points, plus accrued interest to the date of redemption.

"Treasury Yield" means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date.

"Comparable Treasury Issue" means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term of the Debentures due 2027 that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Debentures due 2027. "Independent Investment Banker" means Morgan Stanley & Co. Incorporated or, if such firm is unwilling or unable to select the Comparable Treasury Issue, an independent investment banking institution of national standing appointed by the Trustee.

"Comparable Treasury Price" means, with respect to any redemption date, (i) the average of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on the third business day preceding such redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal Reserve Bank of New York and designated "Composite 3:30 p.m. Quotations for U.S. Government Securities" or (ii) if such release (or any successor release) is not published or does not contain such prices on such business day, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (B) if the Trustee obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such Quotations. "Reference Treasury Dealer Quotations" means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Trustee, of the bid and asked prices of the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m. on the third business day preceding such redemption date.

"Reference Treasury Dealer" means each of Morgan Stanley & Co. Incorporated, BancAmerica Securities, Inc., Chase Securities Inc. and J.P. Morgan Securities Inc., and their respective successors; provided however, that if any of the foregoing shall cease to be a primary U.S. Government Securities dealer in New York City (a "Primary Treasury Dealer"), the Company shall substitute therefor another Primary Treasury Dealer.

Holders of Debentures due 2027 to be redeemed will receive notice thereof by first-class mail at least 30 and not more than 60 days prior to the date fixed for redemption.

CERTAIN COVENANTS OF THE COMPANY

Definitions. The term "Attributable Debt" shall mean in connection with a sale and lease-back transaction the lesser of (a) the fair value of the assets subject to such transaction or (b) the present value of the obligations

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of the lessee for net rental payments during the term of any lease discounted at the rate of interest set forth or implicit in the terms of such lease or, if not practicable to determine such rate, the weighted average interest rate per annum borne by the Debt Securities of each series outstanding pursuant to the Indenture and subject to limitations on sale and lease-back transaction covenants, compounded semiannually in either case as determined by the principal accounting or financial officer of the Company. The term "Subsidiary" shall mean any corporation of which at least a majority of the outstanding stock having voting power under ordinary circumstances for the election of the board of directors of said corporation shall at the time be owned by the Company or by the Company and one or more Subsidiaries or by one or more Subsidiaries. The term "Consolidated Subsidiary" shall mean any Subsidiary substantially all the property of which is located, and substantially all the operations of which are conducted, in the United States of America whose financial statements are consolidated with those of the Company in accordance with generally accepted accounting principles. The term "Exempted Debt" shall mean the sum of the following as of the date of determination: (i) Indebtedness of the Company and its Consolidated Subsidiaries incurred after the date of the Indenture and secured by liens not permitted by the limitation on liens provisions, and (ii) Attributable Debt of the Company and its Consolidated Subsidiaries in respect of every sale and lease-back transaction entered into after the date of the Indenture, other than leases permitted by the limitation on sale and lease-back provisions. The term "Indebtedness" shall mean all items classified as indebtedness on the most recently available consolidated balance sheet of the Company and its Consolidated Subsidiaries, in accordance with generally accepted accounting principles.

Limitation on Liens. The Company covenants that, so long as any of the Notes remain outstanding, it will not, nor will it permit any Consolidated Subsidiary, to create or assume any Indebtedness for money borrowed which is secured by a lien (as defined) upon any assets, whether now owned or hereafter acquired, of the Company or any such Consolidated Subsidiary without equally and ratably securing the Notes by a lien ranking ratably with and equally to such secured Indebtedness, except that the foregoing restriction shall not apply to (a) liens on assets of any corporation existing at the time such corporation becomes a Consolidated Subsidiary; (b) liens on assets existing at the time of acquisition thereof, or to secure the payment of the purchase price of such assets, or to secure indebtedness incurred or guaranteed by the Company or a Consolidated Subsidiary for the purpose of financing the purchase price of such assets or improvements or construction thereon, which indebtedness is incurred or guaranteed prior to, at the time of or within 360 days after such acquisition (or in the case of real property, completion of such improvement or construction or commencement of full operation of such property, whichever is later); (c) liens securing indebtedness owed by any Consolidated Subsidiary to the Company or another wholly owned Subsidiary; (d) liens on any assets of a corporation existing at the time such corporation is merged into or consolidated with the Company or a Subsidiary or at the time of a purchase, lease or other acquisition of the assets of a corporation or firm as an entirety or substantially as an entirety by the Company or a Subsidiary;
(e) liens on any assets of the Company or a Consolidated Subsidiary in favor of the United States of America or any state thereof, or in favor of any other country, or political subdivision thereof, to secure certain payments pursuant to any contract or statute or to secure any indebtedness incurred or guaranteed for the purpose of financing all or any part of the purchase price (or, in the case of real property, the cost of construction) of the assets subject to such liens (including, but not limited to, liens incurred in connection with pollution control, industrial revenue or similar financing);
(f) any extension, renewal or replacement (or successive extensions, renewals or replacements) in whole or in part, of any lien referred to in the foregoing clauses (a) to (e), inclusive; (g) certain statutory liens or other similar liens arising in the ordinary course of business of the Company or a Consolidated Subsidiary, or certain liens arising out of government contracts;
(h) certain pledges, deposits or liens made or arising under the worker's compensation or similar legislation or in certain other circumstances; (i) certain liens in connection with legal proceedings, including certain liens arising out of judgments or awards; or (j) liens for certain taxes or assessments, landlord's liens and liens and charges incidental to the conduct of the business or the ownership of the assets of the Company or of a Consolidated Subsidiary, which were not incurred in connection with the borrowing of money and which do not, in the opinion of the Company, materially impair the use of such assets in the operation of the business of the Company or such Consolidated Subsidiary or the value of such assets for the purposes thereof. Notwithstanding the above, the Company or any Consolidated Subsidiary may, without securing the Notes, create or assume any

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Indebtedness which is secured by a lien which would otherwise be subject to the foregoing restrictions, provided that after giving effect thereto the Exempted Debt then outstanding at such time does not exceed 10% of the total assets of the Company and its Subsidiaries on a consolidated basis.

Limitation on Sale and Lease-Back Transactions. Sale and lease-back transactions (except such transactions involving leases for less than three years) by the Company or any Consolidated Subsidiary of any assets are prohibited unless (a) the Company or such Consolidated Subsidiary would be entitled to incur Indebtedness secured by a lien on the assets to be leased in an amount at least equal to the Attributable Debt in respect of such transaction without equally and ratably securing the Notes, or (b) the proceeds of the sale of the assets to be leased are at least equal to their fair market value and the proceeds are applied to the purchase or acquisition (or, in the case of real property, the construction) of assets or to the retirement of indebtedness. The foregoing limitation will not apply, if at the time the Company or any Consolidated Subsidiary enters into such sale and lease-back transaction, and after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Company and its Subsidiaries on a consolidated basis.

SUCCESSOR CORPORATION

The Indenture provides that the Company shall not consolidate or merge with or into, or transfer or lease its assets substantially as an entirety to any person unless the Company shall be the continuing corporation, or the successor corporation or person to which such assets are transferred or leased shall be a corporation organized under the laws of the United States, any state thereof or the District of Columbia and shall expressly assume the Company's obligations on the Notes and under the Indenture, and immediately after giving effect to such transaction no Event of Default (as defined in the Indenture) shall have occurred and be continuing, and certain other conditions are met. Upon assumption of the Company's obligations by a person to whom such assets are transferred or leased, subject to certain exceptions, the Company shall be discharged from all obligations under the Notes and the Indenture.

This covenant would not apply to any recapitalization transaction, a change of control of the Company or a highly leveraged transaction unless such transaction or change of control were structured to include a merger or consolidation or transfer or lease of the Company's assets substantially as an entirety. There are no covenants or other provisions in the Indenture providing for a put or increased interest or that would otherwise afford holders of Notes protection in the event of a recapitalization transaction, a change of control of the Company or a highly leveraged transaction.

EVENTS OF DEFAULT

An Event of Default is defined under the Indenture with respect to Debt Securities of each series as being: (a) default in payment of all or any part of the principal of, or premium, if any, on any Debt Securities of such series when due, either at maturity, upon any redemption, by declaration or otherwise; (b) default for 30 days in payment of any interest on any Debt Securities of such series; (c) default in payment of any sinking fund installment when due by the terms of the Debt Securities of such series; (d) default for 60 days after written notice as provided in the Indenture in the observance or performance of any other covenant or agreement in the Debt Securities of such series or in the Indenture, other than a covenant included in the Indenture solely for the benefit of a series of Debt Securities other than such series; or (e) certain events of bankruptcy, insolvency or reorganization.

The Indenture provides that (a) if an Event of Default due to the default in payment of principal, premium, if any, or interest on any series of Debt Securities, or due to the default in the performance or breach of any other covenant or agreement of the Company applicable to the Debt Securities of such series but not applicable to all outstanding Debt Securities, shall have occurred and be continuing, either the Trustee or the holders of not less than 25% in principal amount of the Debt Securities of such series may declare the principal of all Debt Securities of such series and interest accrued thereon to be due and payable immediately and (b) if an Event of Default due to a default in the performance of any other of the covenants or agreements in the Indenture

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applicable to all Debt Securities then outstanding or due to certain events of bankruptcy, insolvency and reorganization of the Company shall have occurred and be continuing, either the Trustee or the holders of not less than 25% in principal amount of the Debt Securities then outstanding (treated as one class) may declare the principal of all such Debt Securities and interest accrued thereon to be due and payable immediately, but upon certain conditions such declarations may be annulled and past defaults may be waived (except a continuing default in payment of principal, premium, if any, or interest on such Debt Securities) by the holders of a majority in principal amount of the Debt Securities of such series (or of all series, as the case may be) then outstanding.

The Indenture contains a provision entitling the Trustee, subject to the duty of the Trustee to act with the required standard of care, to be indemnified by the holders of Debt Securities requesting the Trustee to exercise any right or power under the Indenture before proceeding to exercise any such right or power at the request of such holders.

The Indenture provides that no holder of Debt Securities of any series may institute any action against the Company under the Indenture (except actions for payment of overdue principal, premium, if any, or interest) unless such holder previously shall have given to the Trustee written notice of default and continuance thereof and unless the holders of not less than 25% in principal amount of the Debt Securities of such series then outstanding shall have requested the Trustee to institute such action and shall have offered the Trustee reasonable indemnity, the Trustee shall not have instituted such action within 60 days of such request and the Trustee shall not have received direction inconsistent with such written request by the holders of a majority in principal amount of the Debt Securities of such series then outstanding.

The Indenture contains a covenant that the Company will file annually with the Trustee a certificate of no default or a certificate specifying any default that exists.

DISCHARGE, DEFEASANCE AND COVENANT DEFEASANCE

The Company can discharge or decrease its obligations under the Indenture as set forth below.

Under terms satisfactory to the Trustee, the Company may discharge certain obligations to holders of any series of Debt Securities which have not already been delivered to the Trustee for cancellation and which have either become due and payable or are by their terms due and payable within one year (or scheduled for redemption within one year) by irrevocably depositing with the Trustee cash or U.S. Government Obligations (as defined in the Indenture), as trust funds in an amount certified to be sufficient to pay when due, whether at maturity, upon redemption or otherwise, the principal of, premium, if any, and interest on such Debt Securities.

The Company may also discharge any and all of its obligations to holders of any series of Debt Securities at any time ("defeasance"), but may not thereby avoid its duty to register the transfer or exchange of such series of Debt Securities, to replace any temporary, mutilated, destroyed, lost or stolen series of Debt Securities or to maintain an office or agency in respect of such series of Debt Securities. Under terms satisfactory to the Trustee, the Company may instead be released with respect to any outstanding series of Debt Securities from the obligations imposed by certain provisions of the Indenture (which contain the covenants described above limiting liens, consolidations, mergers, transfers and leases and certain dispositions) and omit to comply with such sections without creating an Event of Default ("covenant defeasance"). Defeasance or covenant defeasance may be effected only if, among other things: (i) the Company irrevocably deposits with the Trustee cash or U.S. Government Obligations, as trust funds in an amount certified to be sufficient to pay at maturity (or upon redemption) the principal, premium, if any, and interest on all outstanding Debt Securities of such series and (ii) the Company delivers to the Trustee an opinion of counsel to the effect that the holders of such series of Debt Securities will not recognize income, gain or loss for United States Federal income tax purposes as a result of such defeasance or covenant defeasance and that defeasance or covenant defeasance will not otherwise alter such holders' United States Federal income tax treatment of principal, premium and interest payments on such series of Debt Securities. In the case of a defeasance, such opinion must be based on a ruling of the Internal Revenue

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Service or a change in United States Federal income tax law occurring after the date of the Indenture, since such a result would not occur under current tax law.

MODIFICATION OF THE INDENTURE

The Indenture provides that the Company and the Trustee may enter into supplemental indentures without the consent of the holders of Debt Securities to: (a) secure any Debt Securities, (b) evidence the assumption by a successor corporation of the obligations of the Company, (c) add covenants for the protection of the holders of Debt Securities, (d) cure any ambiguity or correct any inconsistency in the Indenture, provided that such cure or correction does not adversely affect the holders of Debt Securities, (e) establish the forms or terms of Debt Securities of any series and (f) evidence the acceptance of appointment by a successor trustee.

The Indenture also contains provisions permitting the Company and the Trustee, with the consent of the holders of not less than a majority in aggregate principal amount of Debt Securities of all series then outstanding and affected (voting as one class), to add any provisions to, or change in any manner or eliminate any of the provisions of, the Indenture or modify in any manner the rights of the holders of the Debt Securities of each series so affected; provided that the Company and the Trustee may not, without the consent of the holder of each outstanding Debt Security affected thereby, (a) extend the final maturity of any Debt Security, or reduce the principal amount thereof or premium thereon, if any, or reduce the rate or extend the time of payment of interest thereon, or reduce any amount payable on redemption thereof or change the currency in which the principal thereof, premium, if any, or interest thereon is payable or reduce the amount of the principal of any Debt Security issued with original issue discount that is payable upon acceleration or provable in bankruptcy or alter certain provisions of the Indenture relating to the Debt Securities not denominated in U.S. dollars or impair the right to institute suit for the enforcement of any payment on any Debt Security when due or (b) reduce the aforesaid percentage in principal amount of Debt Securities of any series, the consent of the holders of which is required for any such modification.

CONCERNING THE TRUSTEE

The First National Bank of Chicago is the Trustee under the Indenture. All payments of principal of, premium, if any, and interest on and all registration, transfer, exchange, authentication and delivery (including authentication and delivery on original issuance of the Notes) of, the Notes will be effected by the Trustee at an office designated by the Trustee in New York, New York.

The Indenture contains certain limitations on the right of the Trustee, should it become a creditor of the Company, to obtain payment of claims in certain cases or to realize on certain property received in respect of any such claim as security or otherwise. The Trustee will be permitted to engage in other transactions; however, if it acquires any conflicting interest it must eliminate such conflict or resign.

In case of any conflicting interest relating to the Trustee's duties with respect to the Notes, the Trustee shall either eliminate such conflicting interest or except as otherwise provided in the TIA, resign.

The holders of a majority in principal amount of any series of Debt Securities then outstanding will have the right to direct the time, method and place of conducting any proceeding for exercising any remedy available to the Trustee with respect to such series of Debt Securities, provided that such direction would not conflict with any rule of law or with the Indenture, would not be unduly prejudicial to the rights of another holder of the Debt Securities, and would not involve the Trustee in personal liability. The Indenture provides that in case an Event of Default shall occur and be known to the Trustee (and not be cured), the Trustee will be required to use the degree of care of a prudent man in the conduct of his own affairs in the exercise of its power. Subject to such provisions, the Trustee will be under no obligation to exercise any of its rights or powers under the Indenture at the request of any of the holders of the Debt Securities, unless they shall have offered to the Trustee security and indemnity satisfactory to it.

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The Trustee is one of a number of banks with which the Company and its subsidiaries maintain ordinary banking and trust relationships. With respect to the sale of the Company's Trust Convertible Preferred Securities, the Trustee also serves as trustee under the indenture pursuant to which convertible subordinated debt of the Company was issued, a guarantee agreement of the Company issued with respect to trust convertible preferred securities and a declaration of trust related to the issue of trust convertible preferred securities.

NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS, STOCKHOLDERS OR INCORPORATORS

The Indenture provides that no past, present or future director, officer, employee, stockholder or incorporator of the Company or any successor corporation shall have any liability for any obligations of the Company under the Notes or the Indenture or for any claim based on, in respect of, or by reason of such obligations or their creation, by reason of such person's or entity's status as such director, officer, stockholder or incorporator.

REGISTRATION RIGHTS

Holders of Exchange Notes are not entitled to any registration rights with respect to the Exchange Notes. Pursuant to the Registration Rights Agreement, holders of Private Notes are entitled to certain registration rights. Under the Registration Rights Agreement, the Company has agreed, for the benefit of the holders of Private Notes, that it will, at its expense (i) file a registration statement with the Commission with respect to the Exchange Offers by July 9, 1997 and (ii) use its reasonable best efforts to cause such registration statement to be declared effective under the Securities Act by September 7, 1997. The Registration Statement of which the Prospectus is a part constitutes the registration statement for the Exchange Offers.

If, (i) because of any change in law or in currently prevailing interpretations of the Staff the Company is not permitted to effect any of the Exchange Offers, (ii) any of the Exchange Offers are not consummated by October 22, 1997, or (iii) in the case of any holder that participates in the Exchange Offers, such holder does not receive applicable Exchange Notes on the date of the exchange that may be sold without restriction under state and Federal securities laws (other than due solely to the status of such holder as an affiliate of the Company within the meaning of the Securities Act or as a broker-dealer), then in each case, the Company will (x) promptly deliver to the applicable holders written notice thereof and (y) at the Company's sole expense (a) as promptly as practicable (but in no event more than 60 days after so required or requested pursuant to the Registration Rights Agreement), file a shelf registration covering resales of the applicable Private Notes (the "Shelf Registration Statement"), (b) use its reasonable best efforts to cause the Shelf Registration Statement to be declared effective under the Securities Act and (c) use its reasonable best efforts to keep effective the Shelf Registration Statement until the earlier of two years (or, if Rule 144(k) is amended to provide a shorter restrictive period, such shorter period) after the Closing Date or such time as all of the applicable Private Notes have been sold thereunder. The Company will, in the event that a Shelf Registration Statement is filed, provide to each applicable holder copies of the prospectus that is a part of the Shelf Registration Statement, notify each such holder when the Shelf Registration Statement for the applicable Private Notes has become effective and take certain other actions as are required to permit unrestricted resales of the applicable Private Notes. A holder that sells Private Notes pursuant to the Shelf Registration Statement will be required to be named as a selling security holder in the related prospectus and to deliver a prospectus to purchasers, will be subject to certain of the civil liability provisions under the Securities Act in connection with such sales and will be bound by the provisions of the Registration Rights Agreement that are applicable to such a holder (including certain indemnification rights and obligations).

The Registration Rights Agreement is governed by, and construed in accordance with, the laws of the State of New York. The summary herein of certain provisions of the Registration Rights Agreement does not purport to be complete and is subject to, and is qualified in its entirety by reference to, all the provisions of the Registration Rights Agreement, a copy of which is attached as an exhibit to the Registration Statement of which this Prospectus forms a part and is available upon request to the Company.

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CERTAIN UNITED STATES FEDERAL TAX CONSEQUENCES

The following is a general discussion of certain United States Federal tax consequences associated with the exchange of Private Notes for Exchange Notes and the acquisition and disposition of the Exchange Notes by a holder who holds the Exchange Notes as "capital assets" (generally, property held for investment). This discussion is based upon the United States Federal tax laws, regulations, rulings and decisions now in effect, which are subject to change, possibly retroactively. This discussion does not cover all aspects of Federal income taxation that may be relevant to holders, in light of their specific circumstances, particularly holders subject to special tax treatment (such as insurance companies, financial institutions, tax exempt organizations or foreign persons, except to the extent described below). Prospective investors are urged to consult their tax advisors regarding the United States Federal tax consequences of acquiring, holding, and disposing of the Exchange Notes, as well as any tax consequences that may arise under the laws of any foreign, state, local, or other taxing jurisdiction.

For purposes of this discussion, a "U.S. holder" means a holder that is a citizen or resident of the United States, a corporation, partnership, or other entity created or organized in the United States or under the laws of the United States or of any political subdivision thereof, an estate whose income is includible in gross income for United States Federal income tax purposes regardless of its source, or a trust whose administration is subject to the primary supervision of a United States court and which has one or more United States fiduciaries who have the authority to control all substantial decisions of the trust. A "Non-U.S. holder" means a beneficial owner of Exchange Notes who is not a U.S. holder.

U.S. HOLDERS

Exchange of Notes. There will be no Federal income tax consequences to holders exchanging Private Notes for Exchange Notes pursuant to the Exchange Offers and such a holder will have the same adjusted basis and holding period in the Exchange Notes as it had in the Private Notes immediately before the exchange.

Disposition of Exchange Notes. In general, the holder of an Exchange Note will recognize gain or loss upon the sale, redemption, retirement or other disposition of the Exchange Note measured by the difference between the amount of cash and the fair market value of property received (except to the extent attributable to the payment of accrued interest), and the holder's tax basis in the Exchange Note. Subject to the market discount rules discussed below, the gain or loss on the sale or other disposition of the Exchange Note should be long-term capital gain or loss, provided the holder has a holding period for the Exchange Note (which would include the holding period of the Private Note) of more than one year.

Market Discount on Resale. Holders, other than original purchasers of Private Notes in the original offering, should be aware that the resale of the Exchange Notes may be affected by the market discount provisions of the Code. These rules generally provide that if a subsequent holder of an Exchange Note purchases it at a market discount in excess of statutorily defined de minimis amount, and thereafter recognizes gain upon a disposition (including a partial redemption) of the Exchange Note, the lesser of such gain or the portion of the market discount that accrued while the Exchange Note was held by such holder will be treated as ordinary interest income at the time of the disposition. The rules also provide that a holder who acquires an Exchange Note at a market discount may be required to defer a portion of any interest expense that may otherwise be deductible on any indebtedness incurred or maintained to purchase or carry such Exchange Note until the holder disposes of such Exchange Note in a taxable transaction. If a holder of an Exchange Note elects to include market discount in income currently, both of the foregoing rules would not apply.

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NON-U.S. HOLDERS

Under present United States Federal income and estate tax law, assuming certain certification requirements are satisfied (which include identification of the beneficial owner of the instrument), and subject to the discussion of backup withholding below:

(a) payments of interest on the Exchange Notes to any Non-U.S. holder will not be subject to United States Federal income or withholding tax, provided that (1) the holder does not actually or constructively own 10% or more of the total combined voting power of all classes of stock of McKesson entitled to vote, (2) the holder is not (i) a foreign tax exempt organization or a foreign private foundation for United States Federal income tax purposes, (ii) a bank receiving interest pursuant to a loan agreement entered into in the ordinary course of its trade or business, or
(iii) a controlled foreign corporation that is related to McKesson through stock ownership, and (3) such interest payments are not effectively connected with the conduct of a United States trade or business of the holder;

(b) a holder of an Exchange Note who is a Non-U.S. holder will not be subject to the United States Federal income tax on gain realized on the sale, exchange, or other disposition of an Exchange Note, unless (1) such holder is an individual who is present in the United States for 183 days or more during the taxable year and certain other requirements are met, or (2) the gain is effectively connected with the conduct of a United States trade or business of the holder; and

(c) if interest on the Exchange Notes is exempt from withholding of United States Federal income tax under the rules described above, the Exchange Notes will not be included in the estate of a deceased Non-U.S. holder for United States Federal estate tax purposes.

The certification referred to above may be made on an Internal Revenue Service Form W-8 or substantially similar substitute form.

INFORMATION REPORTING AND BACKUP WITHHOLDING

Under temporary United States Treasury regulations, United States information reporting requirements and backup withholding tax will generally not apply to interest paid on the Exchange Notes to a Non-U.S. holder at an address outside the United States. Payments by a United States office of a broker of the proceeds of a sale of the Exchange Notes are subject to both backup withholding at a rate of 31% and information reporting unless the holder certifies its Non-U.S. holder status under penalties of perjury or otherwise establishes an exemption. Information reporting requirements (but not backup withholding) will also apply to payments of the proceeds of sales of the Exchange Notes by foreign offices of United States brokers, or foreign brokers with certain types of relationships to the United States, unless the broker has documentary evidence in its records that the holder is a Non-U.S. holder and certain other conditions are met, or the holder otherwise establishes an exemption.

Backup withholding is not an additional tax. Any amounts withheld under the backup withholding rules will be refunded or credited against the holder's United States Federal income tax liability, provided that the required information is furnished to the Internal Revenue Service.

These information reporting and backup withholding rules are under review by the United States Treasury and their application to the Exchange Notes could be changed by future regulations. The Internal Revenue Service recently issued proposed Treasury Regulations concerning the withholding of tax and reporting for certain amounts paid to non-resident individuals and foreign corporations. The proposed Treasury Regulations, if adopted in their present form, would be effective for payments made after December 31, 1997. Prospective investors should consult their tax advisors concerning the potential adoption of such proposed Treasury Regulations and the potential effect on their ownership of the Exchange Notes.

37

PLAN OF DISTRIBUTION

Each broker-dealer that receives Exchange Notes for its own account pursuant to the Exchange Offers must acknowledge that it will deliver a Prospectus in connection with any resale of such Exchange Notes. This Prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of Exchange Notes received in exchange for Private Notes where such Private Notes were acquired by such broker-dealer as a result of market-making activities or other trading activities. The Company has agreed that, starting on the applicable Expiration Date and ending on the close of business on the 180th day following such Expiration Date, it will make this Prospectus, as amended or supplemented, available to any broker- dealer for use in connection with any such resale. In addition, until , 1997 (90 days after the date of this Prospectus), all dealers effecting transactions in the Exchange Notes may be required to deliver a prospectus.

The Company will not receive any proceeds from any sale of Exchange Notes by broker-dealers. Exchange Notes received by broker-dealers for their own account pursuant to the Exchange Offers may be sold from time to time in one or more transactions in the over-the-counter market, in negotiated transactions, through the writing of options on the Exchange Notes or a combination of such methods of resale, at market prices prevailing at the time of resale, at prices related to such prevailing market prices or at negotiated prices. Any such resale may be made directly to purchasers or to or through brokers or dealers who may receive compensation in the form of commissions or concessions from any such broker-dealer and/or the purchasers of any such Exchange Notes. Any broker-dealer that resells Exchange Notes that were received by it for its own account pursuant to the Exchange Offers and any broker or dealer that participates in a distribution of such Exchange Notes may be deemed to be an "underwriter" within the meaning of the Securities Act and any profit of any such resale of Exchange Notes and any commissions or concessions received by any such persons may be deemed to be underwriting compensation under the Securities Act. Each Letter of Transmittal states that by acknowledging that it will deliver and by delivering a prospectus, a broker-dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

For a period of 180 days after the Expiration Date, the Company will promptly send additional copies of this Prospectus and any amendment or supplement to this Prospectus to any broker-dealer that requests such documents in the applicable Letter of Transmittal. The Company has agreed to pay all expenses incident to the Exchange Offers (including the expenses of any special counsel for the holders of the Private Notes) other than commissions or concessions of any brokers or dealers and will indemnify the holders of the Private Notes (including any broker-dealers) against certain liabilities, including liabilities under the Securities Act.

EXPERTS

The consolidated financial statements of McKesson and the related financial statement schedule incorporated in this Prospectus by reference from the Company's Annual Report on Form 10-K for the year ended March 31, 1997 and the consolidated financial statements of FoxMeyer Corporation for the year ended March 31, 1996 incorporated in this Prospectus by reference from the Company's Current Report on Form 8-K/A filed with the Commission on April 28, 1997 have been audited by Deloitte & Touche LLP, independent auditors, as stated in their reports incorporated herein by reference (which report dated May 16, 1997 on the Company's consolidated financial statements expresses an unqualified opinion and which report on FoxMeyer Corporation's consolidated financial statements dated June 28, 1996 (March 18, 1997 as to paragraph seven of Note Q), expresses an unqualified opinion and includes an explanatory paragraph relating to the sale of the principal assets of FoxMeyer Corporation and its Chapter 7 bankruptcy filing). Such consolidated financial statements and financial statement schedule have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

LEGAL MATTERS

The validity of the Exchange Notes offered hereby will be passed upon for McKesson by Skadden, Arps, Slate, Meagher & Flom LLP.

38



NO DEALER, SALESPERSON OR ANY OTHER PERSON HAS BEEN AUTHORIZED IN CONNECTION WITH ANY OFFERING MADE HEREBY TO GIVE ANY INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED OR INCORPORATED BY REFERENCE IN THIS PROSPECTUS, AND IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY SECURITY OTHER THAN THE EXCHANGE NOTES OFFERED HEREBY, NOR DOES IT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY OF THE EXCHANGE NOTES OFFERED HEREBY BY ANYONE IN ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION IS NOT AUTHORIZED, OR IN WHICH THE PERSON MAKING SUCH OFFER OR SOLICITATION IS NOT QUALIFIED TO DO SO OR TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF.

TABLE OF CONTENTS

                                                                            PAGE
                                                                            ----
                                   PROSPECTUS
Available Information......................................................   3
Incorporation of Certain Documents by Reference............................   3
Special Note Regarding Forward-Looking Statements..........................   4
Summary....................................................................   5
Risk Factors...............................................................  10
The Company................................................................  12
Use of Proceeds............................................................  15
Capitalization of McKesson.................................................  16
Selected Consolidated Financial Information of McKesson....................  17
The Exchange Offers........................................................  19
Description of Notes.......................................................  27
Certain United States Federal Tax Consequences.............................  36
Plan of Distribution.......................................................  38
Experts....................................................................  38
Legal Matters..............................................................  38

UNTIL , 1997 (90 DAYS AFTER THE DATE OF THIS PROSPECTUS), ALL DEALERS OFFERING TRANSACTIONS IN THE EXCHANGE NOTES, WHETHER OR NOT PARTICIPATING IN THE EXCHANGE OFFER, MAY BE REQUIRED TO DELIVER A PROSPECTUS.





MCKESSON CORPORATION

OFFERS TO EXCHANGE

$175,000,000 6.60% EXCHANGE NOTES
DUE MARCH 1, 2000,

$175,000,000 6 7/8% EXCHANGE NOTES
DUE MARCH 1, 2002 AND

$175,000,000 7.65% EXCHANGE DEBENTURES
DUE MARCH 1, 2027


PROSPECTUS

JULY , 1997




PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

Article VIII of the Restated By-Laws of the Company, in accordance with the provisions of Section 145 of the General Corporation Law of Delaware (the "Delaware Corporation Law"), provides that the Company shall indemnify any person in connection with any threatened, pending or completed legal proceeding (other than a legal proceeding by or in the right of the Company) by reason of the fact that he is or was a director or officer of the Company or is or was serving at the request of the Company as a director, officer, employee or agent of another corporation, partnership or other enterprise against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred in connection with such legal proceeding if he acted in good faith and in a manner that he reasonably believed to be in or not opposed to the best interests of the Company, and, with respect to any criminal action or proceeding, if he had no reasonable cause to believe that his conduct was unlawful. If the legal proceeding is by or in the right of the Company, the director or officer may be indemnified by the Company against expenses (including attorneys' fees) actually and reasonably incurred in connection with the defense or settlement of such legal proceeding if he acted in good faith and in a manner he reasonably believed to be in or not opposed to the best interests of the Company, except that he may not be indemnified in respect of any claim, issue or matter as to which he shall have been adjudged to be liable to the Company unless a court determines otherwise.

Article VIII of McKesson's Restated By-Laws allows the Company to maintain director and officer liability insurance on behalf of any person who is or was a director or officer of the Company or such person who serves or served as director, officer, employee or agent of another corporation, partnership or other enterprise at the request of the Company.

Article VI of McKesson's Restated Certificate of Incorporation, in accordance with Section 102(b)(7) of the Delaware Corporation Law, provides that no director of the Company shall be personally liable to the Company or its stockholders for monetary damages for any breach of his fiduciary duty as a director; provided, however, that such clause shall not apply to any liability of a director (1) for any breach of his duty of loyalty to the Registrant or its stockholders, (2) for acts or omissions that are not in good faith or involve intentional misconduct or a knowing violation of the law, (3) under Section 174 of the Delaware Corporation Law, or (4) for any transaction from which the director derived an improper personal benefit.

II-1


ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

A. EXHIBITS

The Exhibits listed in the following Exhibit Index are filed as part of the Registration Statement.

EXHIBIT
NUMBER                                DESCRIPTION
-------                               -----------
 4.1    Indenture between the Company and The First National Bank of Chicago,
        dated as of March 11, 1997.
 4.2    Officer's Certificate relating to the Private Notes.
 4.3    Form of Officer's Certificate relating to the Exchange Notes.
 4.4    Form of 6.60% Notes due March 1, 2000 (included in Exhibit A to Annex
        A to Exhibit 4.2 above).
 4.5    Form of 6 7/8% Notes due March 1, 2002 (included in Exhibit A to Annex
        B to Exhibit 4.2 above).
 4.6    Form of 7.65% Debentures due March 1, 2027 (included in Exhibit A to
        Annex C to Exhibit 4.2 above).
 4.7    Form of 6.60% Exchange Notes due March 1, 2000 (included in Exhibit A
        to Annex A to Exhibit 4.3 above).
 4.8    Form of 6 7/8% Exchange Notes due March 1, 2002 (included in Exhibit A
        to Annex B to Exhibit 4.3 above).
 4.9    Form of 7.65% Exchange Debentures due March 1, 2027 (included in
        Exhibit A to Annex C to Exhibit 4.3 above).
 5.1    Opinion of Skadden, Arps, Slate, Meagher & Flom LLP as to the legality
        of the Exchange Notes being registered hereby.*
 8.1    Opinion of Skadden, Arps, Slate, Meagher & Flom LLP as to certain tax
        matters.
10.1    Registration Rights Agreement, dated as of March 11, 1997, among the
        Company and the Initial Purchasers.
23.1    Independent Auditors' Consent.
23.2    Consent of Skadden, Arps, Slate, Meagher & Flom LLP (included in
        Exhibit 5.1).
24.1    Power of Attorney.
25.1    Form T-1 Statement of Eligibility under the Trust Indenture Act of
        1939, as amended, of The First National Bank of Chicago, as Trustee
        under the Indenture.
99.1    Form of Letter of Transmittal for 6.60% Notes due March 1, 2000.
99.2    Form of Letter of Transmittal for 6 7/8% Notes due March 1, 2002.
99.3    Form of Letter of Transmittal for 7.65% Debentures due March 1, 2027.
99.4    Form of Notice of Guaranteed Delivery
99.5    Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies
        and Other Nominees
99.6    Form of Letter to Clients
99.7    Form of Exchange Agent Agreement


* To be filed by amendment

ITEM 22. UNDERTAKINGS.

The undersigned hereby undertakes as follows:

(a) That for purposes of determining any liability under the Securities Act of 1933, each filing of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(b) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is

II-2


against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the Securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

(c) To respond to requests for information that is incorporated by reference into the Prospectus pursuant to Item 4, 10(b), 11 or 13 of Form S-4, within one business day of receipt of such request, and to send the incorporated documents by first-class mail or other equally prompt means. This includes information contained in documents filed subsequent to the effective date of the Registration Statement through the date of responding to the request.

(d) To supply by means of a post-effective amendment all information concerning any transaction, and the company being acquired involved therein, that was not the subject of and included in the Registration Statement when it became effective.

II-3


SIGNATURES

PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT CERTIFIES THAT IT HAS REASONABLE GROUNDS TO BELIEVE THAT IT MEETS ALL OF THE REQUIREMENTS FOR FILING ON FORM S-4 AND HAS DULY CAUSED THIS REGISTRATION STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY AUTHORIZED, IN THE CITY OF SAN FRANCISCO, STATE OF CALIFORNIA, ON THE 8TH DAY OF JULY, 1997.

McKESSON CORPORATION

    /s/ Richard H. Hawkins
By: _________________________________
    NAME:RICHARD H. HAWKINS
    TITLE:VICE PRESIDENT AND CHIEF
    FINANCIAL OFFICER

PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS REGISTRATION

STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE CAPACITIES INDICATED.

              SIGNATURE                                   TITLE
                  *                                Chairman of the Board
-------------------------------------
          ALAN SEELENFREUND


         /s/ Mark A. Pulido                         President and Chief
-------------------------------------              Executive Officer and
             MARK A. PULIDO                         Director (principal
                                                     executive officer)


       /s/ Richard H. Hawkins                        Vice President and
-------------------------------------             Chief Financial Officer
           RICHARD H. HAWKINS                       (principal financial
                                                          officer)


        /s/ Heidi E. Yodowitz                      Controller (principal
-------------------------------------               accounting officer)
           HEIDI E. YODOWITZ


                  *                                       Director
-------------------------------------
         MARY G.F. BITTERMAN


                  *                                       Director
-------------------------------------
          TULLY M. FRIEDMAN


                  *                                       Director
-------------------------------------
          JOHN M. PIETRUSKI

II-4


                  *                                     Director
-------------------------------------
          CARL E. REICHARDT

                  *                                     Director
-------------------------------------
            JANE E. SHAW

                  *                                     Director
-------------------------------------
       ROBERT H. WATERMAN, JR.

                                                        Director
-------------------------------------
          DAVID S. POTTRUCK

*By:    /s/ Nancy A. Miller
  ----------------------------------
            Nancy A. Miller
            Attorney-in-fact

II-5


Exhibit 4.1

McKESSON CORPORATION

and

THE FIRST NATIONAL BANK OF CHICAGO, as Trustee

Indenture

Dated as of March 11, 1997


CROSS REFERENCE SHEET*

Between

Provisions of Trust Indenture Act (as defined herein) and Indenture dated as of March 11, 1997 between McKESSON CORPORATION and THE FIRST NATIONAL BANK OF CHICAGO, Trustee:

SECTION OF THE ACT                                                    SECTION OF INDENTURE
310(a)(1) and (2)......................................................................6.9
310(a)(3) and (4).............................................................Inapplicable
310(b)........................................................6.8 and 6.10(a), (b) and (d)
310(c)........................................................................Inapplicable
311(a)................................................................................6.14
311(b)................................................................................6.14
311(c)........................................................................Inapplicable
312(a).........................................................................4.1 and 4.2
312(b).................................................................................4.2
312(c).................................................................................4.2
313(a).................................................................................4.3
313(b)(1).....................................................................Inapplicable
313(b)(2)..............................................................................4.3
313(c)..........................................................4.3, 5.11, 6.10, 6.11, 8.2
                                                                                  and 12.2
313(d).................................................................................4.3
314(a).........................................................................3.5 and 4.2
314(b)........................................................................Inapplicable
314(c)(1) and (2).....................................................................11.5
314(c)(3).....................................................................Inapplicable
314(d)........................................................................Inapplicable
314(e)................................................................................11.5
314(f)........................................................................Inapplicable
315(a), (c) and (d)....................................................................6.1
315(b)................................................................................5.11
315(e)................................................................................5.12
316(a)(1).....................................................................5.9 and 5.10
316(a)(2).....................................................................Not required
316(a) (last sentence).................................................................7.4
316(b).................................................................................5.7
317(a).................................................................................5.2
317(b)......................................................................3.4(a) and (b)
318(a)................................................................................11.7

*This Cross Reference Sheet is not part of the Indenture.


                                TABLE OF CONTENTS


                                                                            PAGE
                                                                            ----

ARTICLE I            DEFINITIONS

         SECTION 1.1          CERTAIN TERMS DEFINED.........................  1

ARTICLE II           SECURITIES

         SECTION 2.1          FORMS GENERALLY...............................  7
         SECTION 2.2          FORM OF TRUSTEE'S CERTIFICATE OF
                                      AUTHENTICATION........................  7
         SECTION 2.3          AMOUNT UNLIMITED; ISSUABLE IN SERIES..........  8
         SECTION 2.4          AUTHENTICATION AND DELIVERY OF
                                      SECURITIES............................ 11
         SECTION 2.5          EXECUTION OF SECURITIES........................13
         SECTION 2.6          CERTIFICATE OF AUTHENTICATION................. 14
         SECTION 2.7          DENOMINATION AND DATE OF SECURITIES;
                                      PAYMENTS OF INTEREST.................. 14
         SECTION 2.8          REGISTRATION, TRANSFER AND EXCHANGE........... 15
         SECTION 2.9          MUTILATED, DEFACED, DESTROYED, LOST AND
                                      STOLEN SECURITIES..................... 21
         SECTION 2.10         CANCELLATION OF SECURITIES; DESTRUCTION
                                      THEREOF............................... 22
         SECTION 2.11         TEMPORARY SECURITIES.......................... 22

ARTICLE III                   COVENANTS OF THE ISSUER

         SECTION 3.1          PAYMENT OF PRINCIPAL AND INTEREST............. 23
         SECTION 3.2          OFFICES FOR PAYMENTS, ETC..................... 23
         SECTION 3.3          APPOINTMENT TO FILL A VACANCY IN OFFICE
                                      OF TRUSTEE............................ 24
         SECTION 3.4          PAYING AGENTS................................. 24
         SECTION 3.5          COMPLIANCE CERTIFICATES....................... 25
         SECTION 3.6          CORPORATE EXISTENCE........................... 26
         SECTION 3.7          MAINTENANCE OF PROPERTIES......................26
         SECTION 3.8          PAYMENT OF TAXES AND OTHER CLAIMS..............26
         SECTION 3.9          LUXEMBOURG PUBLICATIONS....................... 26



                                        i

                                                                            PAGE
                                                                            ----



ARTICLE IV           SECURITYHOLDER LISTS AND REPORTS BY THE
                              ISSUER AND THE TRUSTEE
         SECTION 4.1          ISSUER TO FURNISH TRUSTEE INFORMATION AS
                                      TO NAMES AND ADDRESSES OF
                                      SECURITYHOLDERS....................... 27
         SECTION 4.2          REPORTS BY THE ISSUER......................... 27
         SECTION 4.3          REPORTS BY THE TRUSTEE........................ 27

ARTICLE V            REMEDIES OF THE TRUSTEE AND
                              SECURITYHOLDERS ON EVENT OF
                              DEFAULT

         SECTION 5.1          EVENT OF DEFAULT DEFINED, ACCELERATION
                                      OF MATURITY; WAIVER OF DEFAULT........ 29
         SECTION 5.2          COLLECTION OF INDEBTEDNESS BY TRUSTEE;
                                      TRUSTEE MAY PROVE DEBT................ 32
         SECTION 5.3          APPLICATION OF PROCEEDS....................... 34
         SECTION 5.4          SUITS FOR ENFORCEMENT......................... 35
         SECTION 5.5          RESTORATION OF RIGHTS ON ABANDONMENT
                                      OF PROCEEDINGS........................ 35
         SECTION 5.6          LIMITATIONS ON SUITS BY SECURITY HOLDERS...... 35
         SECTION 5.7          UNCONDITIONAL RIGHT OF SECURITYHOLDERS
                                      TO INSTITUTE CERTAIN SUITS............ 36
         SECTION 5.8          POWERS AND REMEDIES CUMULATIVE; DELAY
                                      OR OMISSION NOT WAIVER OF DEFAULT..... 36
         SECTION 5.9          CONTROL BY HOLDERS OF SECURITIES.............. 36
         SECTION 5.10         WAIVER OF PAST DEFAULTS....................... 37
         SECTION 5.11         TRUSTEE TO GIVE NOTICE OF DEFAULT, BUT
                                      MAY WITHHOLD IN CERTAIN
                                      CIRCUMSTANCES......................... 37
         SECTION 5.12         RIGHT OF COURT TO REQUIRE FILING OF
                                      UNDERTAKING TO PAY COSTS.............. 37

ARTICLE VI     CONCERNING THE TRUSTEE

         SECTION 6.1          DUTIES AND RESPONSIBILITIES OF THE
                                      TRUSTEE; DURING DEFAULT; PRIOR TO
                                      DEFAULT............................... 38
         SECTION 6.2          CERTAIN RIGHTS OF THE TRUSTEE................. 39


                                       ii

                                                                            PAGE
                                                                            ----



         SECTION 6.3          TRUSTEE NOT RESPONSIBLE FOR RECITALS,
                                      DISPOSITION OF SECURITIES OR
                                      APPLICATION OF PROCEEDS THEREOF....... 40
         SECTION 6.4          TRUSTEE AND AGENTS MAY HOLD SECURITIES
                                      OR COUPONS; COLLECTIONS, ETC.......... 41
         SECTION 6.5          MONEYS HELD BY TRUSTEE........................ 41
         SECTION 6.6          COMPENSATION AND INDEMNIFICATION OF
                                      TRUSTEE AND ITS PRIOR CLAIM........... 41
         SECTION 6.7          RIGHT OF TRUSTEE TO RELY ON OFFICER'S
                                      CERTIFICATE, ETC...................... 41
         SECTION 6.8          INDENTURES NOT CREATING POTENTIAL
                                      CONFLICTING INTERESTS FOR THE
                                      TRUSTEE............................... 42
         SECTION 6.9          QUALIFICATION OF TRUSTEE:  CONFLICTING
                                      INTERESTS............................. 42
         SECTION 6.10         PERSONS ELIGIBLE FOR APPOINTMENT AS
                                      TRUSTEE................................42
         SECTION 6.11         RESIGNATION AND REMOVAL; APPOINTMENT
                                      OF SUCCESSOR TRUSTEE.................. 42
         SECTION 6.12         ACCEPTANCE OF APPOINTMENT BY SUCCESSOR
                                      TRUSTEE............................... 44
         SECTION 6.13         MERGER, CONVERSION, CONSOLIDATION OR
                                      SUCCESSION TO BUSINESS OF TRUSTEE..... 45
         SECTION 6.14         PREFERENTIAL COLLECTION OF CLAIMS
                                      AGAINST THE ISSUER.................... 45
         SECTION 6.15         APPOINTMENT OF AUTHENTICATING AGENT........... 46

ARTICLE VII          CONCERNING THE SECURITYHOLDERS

         SECTION 7.1          EVIDENCE OF ACTION TAKEN BY
                              SECURITYHOLDERS............................... 47
         SECTION 7.2          PROOF OF EXECUTION OF INSTRUMENTS AND
                                      OF HOLDING OF SECURITIES.............. 47
         SECTION 7.3          HOLDERS TO BE TREATED AS OWNERS............... 47
         SECTION 7.4          SECURITIES OWNED BY ISSUER DEEMED NOT
                                      OUTSTANDING........................... 47
         SECTION 7.5          RIGHT OF REVOCATION OF ACTION TAKEN........... 48



                                       iii

                                                                            PAGE
                                                                            ----



ARTICLE VIII         SUPPLEMENTAL INDENTURES

         SECTION 8.1          SUPPLEMENTAL INDENTURES WITHOUT CON-
                                      SENT OF SECURITYHOLDERS............... 48
         SECTION 8.2          SUPPLEMENTAL INDENTURES WITH CONSENT
                                      OF SECURITYHOLDERS.................... 50
         SECTION 8.3          EFFECT OF SUPPLEMENTAL INDENTURE.............. 51
         SECTION 8.4          DOCUMENTS TO BE GIVEN TO TRUSTEE.............. 51
         SECTION 8.5          NOTATION ON SECURITIES IN RESPECT OF
                                      SUPPLEMENTAL INDENTURES............... 52

ARTICLE IX           CONSOLIDATION, MERGER, SALE OR
                              CONVEYANCE

         SECTION 9.1          ISSUER MAY CONSOLIDATE, ETC., ONLY ON
                                      CERTAIN TERMS......................... 52
         SECTION 9.2          SUCCESSOR CORPORATION SUBSTITUTED............. 52
         SECTION 9.3          OPINION OF COUNSEL TO BE GIVEN TRUSTEE.........53

ARTICLE X            SATISFACTION AND DISCHARGE OF INDENTURE;
                              UNCLAIMED MONEYS

         SECTION 10.1         SATISFACTION AND DISCHARGE OF INDENTURE....... 53
         SECTION 10.2         APPLICATION BY TRUSTEE OF FUNDS
                                      DEPOSITED FOR PAYMENT OF
                                      SECURITIES............................ 57
         SECTION 10.3         REPAYMENT OF MONEYS HELD BY PAYING
                                      AGENT................................. 57
         SECTION 10.4         RETURN OF MONEYS HELD BY TRUSTEE AND
                                      PAYING AGENT UNCLAIMED FOR TWO
                                      YEARS................................. 57
         SECTION 10.5         INDEMNITY FOR U.S. GOVERNMENT OF
                                      OBLIGATIONS........................... 58

ARTICLE XI           MISCELLANEOUS PROVISIONS

         SECTION 11.1         INCORPORATORS, STOCKHOLDERS, OFFICERS
                                      AND DIRECTORS OF ISSUER EXEMPT
                                      FROM INDIVIDUAL LIABILITY............. 58


                                       iv

                                                                            PAGE
                                                                            ----



         SECTION 11.2         PROVISIONS OF INDENTURE FOR THE SOLE
                                      BENEFIT OF PARTIES AND HOLDERS OF
                                      SECURITIES AND COUPONS................ 58
         SECTION 11.3         SUCCESSORS AND ASSIGNS OF ISSUER BOUND
                                      BY INDENTURE.......................... 58
         SECTION 11.4         NOTICES AND DEMANDS ON ISSUER, TRUSTEE
                                      AND HOLDERS OF SECURITIES AND
                                      COUPONS............................... 58
         SECTION 11.5         OFFICER'S CERTIFICATES AND OPINIONS OF
                                      COUNSEL; STATEMENTS TO BE
                                      CONTAINED THEREIN..................... 59
         SECTION 11.6         PAYMENTS DUE ON SATURDAYS, SUNDAYS AND
                                      HOLIDAYS.............................. 60
         SECTION 11.7         CONFLICT OF ANY PROVISION OF INDENTURE
                                      WITH TRUST INDENTURE ACT.............. 60
         SECTION 11.8         NEW YORK LAW TO GOVERN........................ 60
         SECTION 11.9         COUNTERPARTS.................................. 61
         SECTION 11.10        EFFECT OF HEADINGS............................ 61
         SECTION 11.11        SECURITIES IN A FOREIGN CURRENCY OR IN
                                      ECU................................... 61
         SECTION 11.12        JUDGMENT CURRENCY............................. 61

ARTICLE XII          REDEMPTION OF SECURITIES AND SINKING FUNDS

         SECTION 12.1         APPLICABILITY OF ARTICLE...................... 62
         SECTION 12.2         NOTICE OF REDEMPTION; PARTIAL
                                      REDEMPTIONS........................... 62
         SECTION 12.3         PAYMENT OF SECURITIES CALLED FOR RE-
                                      DEMPTION.............................. 64
         SECTION 12.4         EXCLUSION OF CERTAIN SECURITIES FROM
                                      ELIGIBILITY FOR SELECTION FOR RE-
                                      DEMPTION.............................. 65
         SECTION 12.5         MANDATORY AND OPTIONAL SINKING FUNDS.......... 65

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THIS INDENTURE, dated as of March 11, 1997, by and between McKESSON CORPORATION, a Delaware corporation (the "Issuer"), and THE FIRST NATIONAL BANK OF CHICAGO, a national banking association, as trustee (the "Trustee"),

W I T N E S S E T H:

WHEREAS, the Issuer has duly authorized the issue from time to time of its unsecured debentures, notes or other evidences of indebtedness to be issued in one or more series (the "Securities") up to such principal amount or amounts as may from time to time be authorized in accordance with the terms of this Indenture;

WHEREAS, the Issuer has duly authorized the execution and delivery of this Indenture to provide, among other things, for the authentication, delivery and administration of the Securities; and

WHEREAS, all things necessary to make this Indenture a valid indenture and agreement according to its terms have been done;

NOW, THEREFORE:

In consideration of the premises and the purchases of the Securities by the holders thereof, the Issuer and the Trustee mutually covenant and agree for the equal and proportionate benefit of the respective holders from time to time of the Securities and of the coupons, if any, appertaining thereto as follows:

ARTICLE I

DEFINITIONS

SECTION 1.1 CERTAIN TERMS DEFINED. The following terms (except as otherwise expressly provided or unless the context otherwise clearly requires) for all purposes of this Indenture and of any indenture supplemental hereto shall have the respective meanings specified in this Section. All other terms used in this Indenture that are defined in the Trust Indenture Act of 1939, as amended (the "Trust Indenture Act"), or the definitions of which in the Securities Act of 1933, as amended (the "Securities Act"), are referred to in the Trust Indenture Act, including terms defined therein by reference to the Securities Act (except as herein otherwise expressly provided or unless the context otherwise requires), shall have the meaning assigned to such terms in the Trust Indenture Act and in the Securities Act as in effect from time to time. All accounting terms used herein and not expressly defined shall have the meanings assigned to such terms in accordance with generally accepted accounting principles, and the term "generally accepted accounting principles" means such accounting principles as are generally accepted at the time of any computation unless a different time shall be specified with respect to such series of Securities as provided for in Section 2.3. The words "herein," "hereof" and "hereunder" and other words of similar import refer to this Indenture as a whole and not

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to any particular Article, Section or other subdivision. The terms defined in this Article have the meanings assigned to them in this Article and include the plural as well as the singular.

"Affiliate" has the same meaning as given to that term in Rule 405 of the Securities Act or any successor provision.

"Authenticating Agent" shall have the meaning set forth in
Section 6.15.

"Authorized Newspaper" means a newspaper (which, in the case of The City of New York, will, if practicable, be The Wall Street Journal (Eastern Edition), in the case of the United Kingdom of Great Britain and Northern Ireland (the "United Kingdom"), will, if practicable, be The Financial Times (London Edition) and, in the case of the Grand Duchy of Luxembourg ("Luxembourg"), will, if practicable, be the Luxemburger Wort) published in an official or common language of the county of publication customarily published at least once a day for at least five days in each calendar week and of general circulation in The City of New York, the United Kingdom or Luxembourg, as applicable. If it shall be impractical in the opinion of the Trustee to make any publication of any notice required hereby in an Authorized Newspaper, any publication or other notice in lieu thereof which is made or given with the approval of the Trustee shall constitute a sufficient publication of such notice.

"Board of Directors" means either the Board of Directors of the Issuer or any committee of such Board duly authorized to act on its behalf.

"Board Resolution" means a copy of one or more resolutions, certified by the secretary or an assistant secretary of the Issuer to have been duly adopted or consented to by the Board of Directors and to be in full force and effect, and delivered to the Trustee.

"Business Day" means, with respect to any Security, a day other than any day on which banking institutions in the city (or in any of the cities, if more than one) in which amounts are payable, as specified in the form of such Security, are authorized or required by any applicable law or regulation to be closed.

"Commission" means the Securities and Exchange Commission, as from time to time constituted, created under the Exchange Act, or if at any time after the execution and delivery of this Indenture such Commission is not existing and performing the duties now assigned to it under the Trust Indenture Act, then the body performing such duties on such date.

"Corporate Trust Office" means the office of the Trustee at which the corporate trust business of the Trustee shall, at any particular time, be principally administered, which office is, as of the date of this Indenture, located at One First National Plaza, Suite 0126, Chicago, Illinois 60670-0126, Attention: Corporate Trust Administration.

"Coupon" means any interest coupon appertaining to an Unregistered Security.

"Covenant Defeasance" shall have the meaning set forth in
Section 10.1(C).

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"Depositary" means, with respect to the Securities of any series issuable or issued in the form of one or more Registered Global Securities, the Person designated as Depositary by the Issuer pursuant to
Section 2.3 until a successor Depositary shall have become such pursuant to the applicable provisions of this Indenture, and thereafter "Depositary" shall mean or include each Person who is then a Depositary hereunder, and if at any time there is more than one such Person, "Depositary" as used with respect to the Securities of any such series shall mean the Depositary with respect to the Registered Global Securities of that series.

"Dollar" or "$" means the coin or currency of the United States of America as at the time of payment is legal tender for the payment of public and private debts.

"ECU" means the European Currency Unit as defined and revised from time to time by the European Monetary System of the European Community.

"Event of Default" means any event or condition specified as such in Section 5.1.

"Exchange Act" means the Securities Exchange Act of 1934, as amended.

"Fair Value" when used with respect to any Voting Stock means the fair value as determined in good faith by the Board of Directors of the Issuer.

"Foreign Currency" means a currency issued by the government of a country other than the United States of America.

"Holder," "Holder of Securities," "Securityholder" or other similar terms mean (a) in the case of any Registered Security, the person in whose name such Security is registered in the security register kept by the Issuer for that purpose in accordance with the terms hereof, and (b) in the case of any Unregistered Security, the bearer of such Security, or any Coupon appertaining thereto, as the case may be.

"Indenture" means this instrument as originally executed and delivered or, if amended or supplemented as herein provided, as so amended or supplemented or both, and shall include the forms and terms of particular series of Securities established as contemplated hereunder.

"IRS" means the Internal Revenue Service of the United States Department of the Treasury, or any successor entity.

"Issuer" means (except as otherwise provided in Article IX) McKesson Corporation, a Delaware corporation, and, subject to Article IX, its successors and assigns.

"Issuer Order" means a written statement, request or order of the Issuer signed in its name by the chairman of the Board of Directors, the president, any vice president or the treasurer of the Issuer.

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"Judgment Currency" has the meaning set forth in
Section 11.12.

"Non-U.S. Person" means any person that is not a "U.S. person" as such term is defined in Rule 902 of the Securities Act.

"Officer's Certificate" means a certificate signed by the chairman of the Board of Directors, the president or any vice president or the treasurer of the Issuer and delivered to the Trustee. Each such certificate shall comply with Section 314 of the Trust Indenture Act and include the statements provided for in Section 11.5.

"144A Global Security" has the meaning set forth in
Section 2.8(b)(i).

"Opinion of Counsel" means an opinion in writing signed by legal counsel who may be an employee of the Issuer or other counsel satisfactory to the Trustee. Each such opinion shall comply with Section 314 of the Trust Indenture Act and include the statements provided for in Section 11.5.

"Original Issue Date" of any Security (or portion thereof) means the earlier of (a) the date of such Security or (b) the date of any Security (or portion thereof) for which such Security was issued (directly or indirectly) on registration of transfer, exchange or substitution.

"Original Issue Discount Security" means any Security that provides for an amount less than the principal amount thereof to be due and payable upon a declaration of acceleration of the maturity thereof pursuant to
Section 5.1.

"Outstanding" (except as otherwise provided in Section 7.4), when used with reference to Securities, means, subject to the provisions of
Section 7.4, as of any particular time, all Securities authenticated and delivered by the Trustee under this Indenture, except

(a) Securities theretofore cancelled by the Trustee or delivered to the Trustee for cancellation;

(b) Securities, or portions thereof, for the payment or redemption of which moneys or U.S. Government Obligations (as provided for in Section 10.1) in the necessary amount shall have been deposited in trust with the Trustee or with any paying agent (other than the Issuer) or shall have been set aside, segregated and held in trust by the Issuer for the Holders of such Securities (if the Issuer shall act as its own paying agent), provided, that if such Securities, or portions thereof, are to be redeemed prior to the maturity thereof, notice of such redemption shall have been given as herein provided, or provisions satisfactory to the Trustee shall have been made for giving such notice; and

(c) Securities which shall have been paid or in substitution for which other Securities shall have been authenticated and delivered pursuant to the terms of Section 2.9 (except with respect to any such Security as to which proof satisfactory to the Trustee

4

is presented that such Security is held by a person in whose hands such Security is a legal, valid and binding obligation of the Issuer).

In determining whether the Holders of the requisite principal amount of Outstanding Securities of any or all series have given any request, demand, authorization, direction, notice, consent or waiver hereunder, the principal amount of an Original Issue Discount Security that shall be deemed to be Outstanding for such purposes shall be the amount of the principal thereof that would be due and payable as of the date of such determination upon a declaration of acceleration of the maturity thereof pursuant to Section 5.1.

"Periodic Offering" means an offering of Securities of a series from time to time, the specific terms of which Securities, including, without limitation, the rate or rates of interest, if any, thereon, the stated maturity or maturities thereof and the redemption provisions, if any, with respect thereto, are to be determined by the Issuer or its agents upon the issuance of such Securities.

"Person" means any individual, corporation, partnership, limited liability company, joint venture, association, joint stock company, trust, unincorporated organization or government or any agency or political subdivision thereof.

"PORTAL Market" means Private Offerings, Resales and Trading through Automatic Linkages Market.

"principal" whenever used with reference to the Securities or any Security or any portion thereof, shall be deemed to include "and premium, if any," provided, however, that such inclusion of premium, if any, shall under no circumstances result in the double counting of such premium for the purpose of any calculation required hereunder.

"QIB" or "Qualified Institutional Buyer" means "Qualified Institutional Buyer" as such term is defined in Rule 144A under the Securities Act.

"record date" shall have the meaning set forth in Section 2.7.

"Registered Global Security" means a Security evidencing all or a part of a series of Registered Securities, issued to the Depositary for such series in accordance with Section 2.4, and bearing the legend prescribed in
Section 2.4 and any other legend required by the Depositary for such series.

"Registered Security" means any Security registered on the Security register of the Issuer.

"Regulation S" means Regulation S under the Securities Act, or any successor provision.

"Regulation S Global Security" has the meaning set forth in
Section 2.8(b).

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"Required Currency" shall have the meaning set forth in
Section 11.12.

"Responsible Officer" when used with respect to the Trustee means the chairman of the board of directors, any vice chairman of the board of directors, the chairman of the trust committee, the chairman of the executive committee, any vice chairman of the executive committee, the president, any vice president (whether or not designated by numbers or words added before or after the title "Vice President"), the cashier, the secretary, the treasurer, any trust officer, any assistant trust officer, any assistant vice president, any assistant cashier, any assistant secretary, any assistant treasurer, or any other officer or assistant officer of the Trustee customarily performing functions similar to those performed by the persons who at the time shall be such officers, respectively, or to whom any corporate trust matter is referred because of his or her knowledge of and familiarity with the particular subject.

"Restricted Security" has the meaning set forth in
Section 2.8(b).

"Rule 144" means Rule 144 under the Securities Act.

"Rule 144A" means Rule 144A under the Securities Act.

"Rule 144K" means Rule 144(k) under the Securities Act.

"Security" or "Securities" (except as otherwise provided in
Section 7.4) has the meaning stated in the first recital of this Indenture, or, as the case may be, Securities that have been authenticated and delivered under this Indenture.

"Securities Act" means the Securities Act of 1933, as amended.

"Subsidiary" means any corporation of which at least a majority of the outstanding stock having the voting power to elect a majority of the Board of Directors of such corporation (irrespective of whether or not at the time stock of any other class or classes of such corporation shall have or might have voting power by reason of the happening of any contingency) is at the time of determination directly or indirectly owned by the Issuer, or by one or more of its Subsidiaries, or by the Issuer and one or more of its Subsidiaries.

"Transfer Restriction Termination Date" means the earlier of the first date on which (i) the Securities of a series (other than such Securities acquired by the Issuer or any Affiliate thereof since the issue date of such Securities) may be sold pursuant to Rule 144K (or any successor provision) and (ii) all such Securities have been exchanged or sold pursuant to an effective registration statement.

"Trustee" means the Person identified as "Trustee" in the first paragraph hereof and, subject to the provisions of Article VI, shall also include any successor trustee. "Trustee" shall also mean or include each Person who is then a trustee hereunder and if at any time there is more than one such Person, "Trustee" as used with respect to the Securities of any series shall mean the trustee with respect to the Securities of such series.

6

"Unregistered Security" means any Security other than a Registered Security.

"U.S. Government Obligations" shall have the meaning set forth in Section 10.1(A).

"Voting Stock" means stock of any class or classes having general voting power under ordinary circumstances to elect a majority of the board of directors, managers or trustees of the corporation in question, provided, that, for the purposes hereof, stock which carries only the right to vote conditionally on the happening of an event shall not be considered voting stock whether or not such event shall have happened.

"Yield to Maturity" means the yield to maturity on a series of securities, calculated at the time of issuance of such series, or, if applicable, at the most recent redetermination of interest on such series, and calculated in accordance with accepted financial practice.

ARTICLE II

SECURITIES

SECTION 2.1 FORMS GENERALLY. The Securities of each series and the Coupons, if any, to be attached thereto shall be substantially in such form (not inconsistent with this Indenture) as shall be established by or pursuant to one or more Board Resolutions (as set forth in a Board Resolution or, to the extent established pursuant to but not set forth in a Board Resolution, an Officer's Certificate detailing such establishment) or in one or more indentures supplemental hereto, in each case with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by this Indenture and may have imprinted or otherwise reproduced thereon such legend or legends or endorsements, not inconsistent with the provisions of this Indenture, as may be required to comply with any law or with any rules or regulations pursuant thereto, or with any rules of any securities exchange or to conform to general usage, all as may be determined by the officers executing such Securities and Coupons, if any, as evidenced by their execution of such Securities and Coupons.

The definitive Securities and Coupons, if any, shall be printed, lithographed or engraved on steel engraved borders or may be produced in any other manner, all as determined by the officers executing such Securities and Coupons, if any, as evidenced by their execution of such Securities and Coupons, if any.

SECTION 2.2 FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTI- CATION. The Trustee's certificate of authentication on all Securities shall be in substantially the following form:

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"This is one of the Securities referred to in the within- mentioned Indenture.

THE FIRST NATIONAL BANK OF CHICAGO,
as Trustee

By

Authorized Signatory"

If at any time there shall be an Authenticating Agent appointed with respect to any series of Securities, then the Trustee's Certificate of Authentication to be borne by the Securities of each such series shall be substantially as follows:

"This is one of the Securities referred to in the within- mentioned Indenture.

[ ]

as Authenticating Agent

By

Authorized Signatory"

SECTION 2.3 AMOUNT UNLIMITED; ISSUABLE IN SERIES. The aggregate principal amount of Securities which may be authenticated and delivered under this Indenture is unlimited.

The Securities may be issued in one or more series and each such series shall rank equally and pari passu with all other unsecured and unsubordinated debt of the Issuer. There shall be established in or pursuant to one or more Board Resolutions (and to the extent established pursuant to but not set forth in a Board Resolution, in an Officer's Certificate detailing such establishment) or established in one or more indentures supplemental hereto, prior to the initial issuance of Securities of any series,

(1) the designation of the Securities of the series, which shall distinguish the Securities of the series from the Securities of all other series, and which may be part of a series of Securities previously issued;

(2) any limit upon the aggregate principal amount of the Securities of the series that may be authenticated and delivered under this Indenture (except for Securities

8

authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Securities of the series pursuant to
Section 2.8, 2.9, 2.11, 8.5 or 12.3);

(3) if other than Dollars, the coin or currency in which the Securities of the series are denominated (including, but not limited to, any Foreign Currency or ECU);

(4) the date or dates on which the principal of the Securities of the series is payable;

(5) the rate or rates at which the Securities of the series shall bear interest, if any, the date or dates from which such interest shall accrue, on which such interest shall be payable and (in the case of Registered Securities) on which a record shall be taken for the determination of Holders to whom interest is payable and/or the method by which such rate or rates or date or dates shall be determined;

(6) the place or places where the principal of and any interest on Securities of the series shall be payable, if other than as provided in Section 3.2;

(7) the right, if any, of the Issuer to redeem Securities, in whole or in part, at its option and the period or periods within which, the price or prices at which and any terms and conditions upon which Securities of the series may be so redeemed, pursuant to any sinking fund or otherwise;

(8) the obligation, if any, of the Issuer to redeem, purchase or repay Securities of the series pursuant to any mandatory redemption, sinking fund or analogous provisions or at the option of a Holder thereof and the price or prices at which and the period or periods within which and any terms and conditions upon which Securities of the series shall be redeemed, purchased or repaid, in whole or in part, pursuant to such obligation;

(9) if other than denominations of $1,000 and any integral multiple thereof in the case of Registered Securities, or $1,000 and $5,000 in the case of Unregistered Securities, the denominations in which Securities of the series shall be issuable;

(10) if other than the principal amount thereof, the portion of the principal amount of Securities of the series which shall be payable upon declaration of acceleration of the maturity thereof;

(11) if other than the coin or currency in which the Securities of the series are denominated, the coin or currency in which payment of the principal of or interest on the Securities of such series shall be payable;

(12) if the principal of or interest on the Securities of the series are to be payable, at the election of the Issuer or a Holder thereof, in a coin or currency other than

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that in which the Securities are denominated, the period or periods within which, and the terms and conditions upon which, such election may be made;

(13) if the amount of payments of principal of and interest on the Securities of the series may be determined with reference to an index based on a coin or currency other than that in which the Securities of the series are denominated, the manner in which such amounts shall be determined;

(14) whether the Securities of the series will be issuable as Registered Securities (and if so, whether such Securities will be issuable as Registered Global Securities) or Unregistered Securities (with or without Coupons), or any combination of the foregoing, any restrictions applicable to the offer, sale or delivery of Unregistered Securities or the payment of interest thereon and, if other than as provided in Section 2.8, the terms upon which Unregistered Securities of any series may be exchanged for Registered Securities of such series and vice versa;

(15) whether and under what circumstances the Issuer will pay additional amounts on the Securities of the series held by a person who is not a U.S. person in respect of any tax, assessment or governmental charge withheld or deducted and, if so, whether the Issuer will have the option to redeem the Securities of the series rather than pay such additional amounts;

(16) if the Securities of the series are to be issuable in definitive form (whether upon original issue or upon exchange of a temporary Security of such series) only upon receipt of certain certificates or other documents or satisfaction of other conditions, the form and terms of such certificates, documents or conditions;

(17) any trustees, depositaries, authenticating or paying agents, transfer agents or registrars of any other agents with respect to the Securities of such series;

(18) any other events of default or covenants with respect to the Securities of such series;

(19) if the Securities of the series are to be convertible into or exchangeable for any other security; and

(20) any other terms of the series (which terms shall not be inconsistent with the provisions of this Indenture).

All Securities of any one series and Coupons, if any, appertaining thereto shall be substantially identical, except in the case of Registered Securities as to denomination and except as may otherwise be provided by or pursuant to the Board Resolution or Officer's Certificate referred to above or as set forth in any indenture supplemental hereto. All Securities of any one series need not be issued at the same time and may be issued from time to time,

10

consistent with the terms of this Indenture, if so provided by or pursuant to such Board Resolution, such Officer's Certificate or in any indenture supplemental hereto.

SECTION 2.4 AUTHENTICATION AND DELIVERY OF SECURI- TIES. The Issuer may deliver Securities of any series having attached thereto appropriate Coupons, if any, executed by the Issuer to the Trustee for authentication together with the applicable documents referred to below in this
Section 2.4, and the Trustee shall thereupon authenticate and deliver such Securities and Coupons, if any, to or upon the order of the Issuer (contained in the Issuer Order referred to below in this Section) or pursuant to such procedures acceptable to the Trustee and to such recipients as may be specified from time to time by an Issuer Order. The maturity date, original issue date, interest rate and any other terms of the Securities of such series and Coupons, if any, appertaining thereto shall be determined by or pursuant to such Issuer Order and procedures. If provided for in such procedures, such Issuer Order may authorize authentication and delivery pursuant to oral or electronic instructions from the Issuer or its duly authorized agent or agents, which instructions, if oral, shall be promptly confirmed in writing. In authenticating such Securities and accepting the additional responsibilities under this Indenture in relation to such Securities, the Trustee shall be entitled to receive (in the case of subparagraphs (2), (3) and (4) below only at or before the time of the first request of the Issuer to the Trustee to authenticate Securities of such series) and (subject to Section 6.1) shall be fully protected in relying upon, the following enumerated documents unless and until such documents have been superseded or revoked:

(1) an Issuer Order requesting such authentication and setting forth delivery instructions if the Securities and Coupons, if any, are not to be delivered to the Issuer, provided that, with respect to Securities of a series subject to a Periodic Offering, (a) such Issuer Order may be delivered by the Issuer to the Trustee prior to the delivery to the Trustee of such Securities for authentication and delivery, (b) the Trustee shall authenticate and deliver Securities of such series for original issue from time to time, in an aggregate principal amount not exceeding the aggregate principal amount established for such series, pursuant to an Issuer Order or pursuant to procedures acceptable to the Trustee as may be specified from time to time by an Issuer Order, (c) the maturity date or dates, original issue date or dates, interest rate or rates and any other terms of Securities of such series shall be determined by an Issuer Order or pursuant to such procedures and (d) if provided for in such procedures, such Issuer Order may authorize authentication and delivery pursuant to oral or electronic instructions from the Issuer or its duly authorized agent or agents, which instructions, if oral, shall be promptly confirmed in writing;

(2) any Board Resolution, Officer's Certificate and/or executed supplemental indenture referred to in Section 2.1 and 2.3 by or pursuant to which the forms and terms of the Securities and Coupons, if any, were established;

(3) an Officer's Certificate setting forth the form or forms and terms of the Securities and Coupons, if any, stating that the form or forms and terms of the Securities

11

and Coupons, if any, have been established pursuant to Sections 2.1 and 2.3 and comply with this Indenture, and covering such other matters as the Trustee may reasonably request; and

(4) At the option of the Issuer, either one or more Opinions of Counsel, or a letter addressed to the Trustee permitting it to rely on one or more Opinions of Counsel, substantially to the effect that:

(a) the form or forms of the Securities and Coupons, if any, have been duly authorized and established in conformity with the provisions of this Indenture;

(b) in the case of an underwritten offering, the terms of the Securities have been duly authorized and established in conformity with the provisions of this Indenture, and, in the case of an offering that is not underwritten, certain terms of the Securities have been established pursuant to a Board Resolution, an Officer's Certificate or a supplemental indenture in accordance with this Indenture, and when such other terms as are to be established pursuant to procedures set forth in an Issuer Order shall have been established, all such terms will have been duly authorized by the Issuer and will have been established in conformity with the provisions of this Indenture; and

(c) such Securities and Coupons, if any, when executed by the Issuer and authenticated by the Trustee in accordance with the provisions of this Indenture and delivered to and duly paid for by the purchasers thereof, and subject to any conditions specified in such Opinion of Counsel, will have been duly issued under this Indenture, will be entitled to the benefits of this Indenture, and will be valid and binding obligations of the Issuer, enforceable in accordance with their respective terms except as the enforceability thereof may be limited by (i) bankruptcy, insolvency or similar laws affecting creditors' rights generally, (ii) rights of acceleration, if any, and (iii) the availability of equitable remedies may be limited by equitable principles of general applicability and such counsel need express no opinion with regard to the enforceability of Section 6.6 or of a judgment denominated in a currency other than Dollars.

In rendering such opinions, any counsel may qualify any opinions as to enforceability by stating that such enforceability may be limited by bankruptcy, insolvency, reorganization, liquidation, moratorium, fraudulent transfer and other similar laws affecting the rights and remedies of creditors and is subject to general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law). Such counsel may rely upon opinions of other counsel (copies of which shall be delivered to the Trustee) reasonably satisfactory to the Trustee, in which case the opinion shall state that such counsel believes he and the Trustee are entitled so to rely. Such counsel may also state that, insofar as

12

such opinion involves factual matters, he has relied, to the extent he deems proper, upon certificates of officers of the Issuer and its subsidiaries and certificates of public officials.

The Trustee shall have the right to decline to authenticate and deliver any Securities under this section if the Trustee, being advised by counsel, determines that such action may not lawfully be taken by the Issuer or if the Trustee in good faith by its board of directors or board of trustees, executive committee or a trust committee of directors or trustees shall determine that such action would expose the Trustee to personal liability to existing Holders or would affect the Trustee's own rights, duties or immunities under the Securities, this Indenture or otherwise.

If the Issuer shall establish pursuant to Section 2.3 that the Securities of a series are to be issued in the form of one or more Registered Global Securities, then the Issuer shall execute and the Trustee shall, in accordance with this Section and the Issuer Order with respect to such series, authenticate and deliver one or more Registered Global Securities that (i) shall represent and shall be denominated in an amount equal to the aggregate principal amount of all of the Securities of such series issued and not yet cancelled,
(ii) shall be registered in the name of the Depositary for such Registered Global Security or Securities or the nominee of such Depositary, (iii) shall be delivered by the Trustee to such Depositary or delivered or held pursuant to such Depositary's instructions and (iv) shall bear a legend substantially to the following effect: "Unless and until it is exchanged in whole or in part for Securities in definitive registered form, this Security may not be transferred except as a whole by the Depositary to the nominee of the Depositary or by a nominee of the Depositary to the Depositary or another nominee of the Depositary or by the Depositary or any such nominee to a successor Depositary or a nominee of such successor Depositary."

Each Depositary designated pursuant to Section 2.3 must, at the time of its designation and at all times while it serves as Depositary, be a clearing agency registered under the Exchange Act and any other applicable statute or regulation.

SECTION 2.5 EXECUTION OF SECURITIES. The Securities and each Coupon appertaining thereto, if any, shall be signed on behalf of the Issuer by the chairman or vice chairman of its Board of Directors or its president, or any executive (senior or other), a vice president or its treasurer, under its corporate seal (except in the case of Coupons) which may, but need not, be attested. Such signatures may be the manual or facsimile signatures of the present or any future such officers. The seal of the Issuer may be in the form of a facsimile thereof and may be impressed, affixed, imprinted or otherwise reproduced on the Securities. Typographical and other minor errors or defects in any such reproduction of the seal or any such signature shall not affect the validity or enforceability of any Security that has been duly authenticated and delivered by the Trustee.

In case any officer of the Issuer who shall have signed any of the Securities or Coupons, if any, shall cease to be such officer before the Security or Coupon so signed (or the Security to which the Coupon so signed appertains) shall be authenticated and delivered by the

13

Trustee or disposed of by the Issuer, such Security or Coupon nevertheless may be authenticated and delivered or disposed of as though the person who signed such Security or Coupon had not ceased to be such officer of the Issuer; and any Security or Coupon may be signed on behalf of the Issuer by such persons as, at the actual date of the execution of such Security or Coupon, shall be the proper officers of the Issuer, although at the date of the execution and delivery of this Indenture any such person was not such an officer.

SECTION 2.6 CERTIFICATE OF AUTHENTICATION. Only such Securities as shall bear thereon a certificate of authentication substantially in the form hereinbefore recited, executed by the Trustee by the manual signature of one of its authorized officers, shall be entitled to the benefits of this Indenture or be valid or obligatory for any purpose. No Coupon shall be entitled to the benefits of this Indenture or shall be valid and obligatory for any purpose until the certificate of authentication on the Security to which such Coupon appertains shall have been duly executed by the Trustee. The execution of such certificate by the Trustee upon any Security executed by the Issuer shall be conclusive evidence that the Security so authenticated has been duly authenticated and delivered hereunder and that the Holder is entitled to the benefits of this Indenture.

SECTION 2.7 DENOMINATION AND DATE OF SECURITIES; PAYMENTS OF INTEREST. The Securities of each series shall be issuable as Registered Securities or Unregistered Securities in denominations established as contemplated by Section 2.3 or, with respect to the Registered Securities of any series, if not so established, in denominations of $1,000 and any integral multiple thereof. If denominations of Unregistered Securities of any series are not so established, such Securities shall be issuable in denominations of $1,000 and $5,000. The Securities of each series shall be numbered, lettered or otherwise distinguished in such manner or in accordance with such plan as the officers of the Issuer executing the same may determine with the approval of the Trustee, as evidenced by the execution and authentication thereof.

Each Registered Security shall be dated the date of its authentication. Each Unregistered Security shall be dated as provided in the Board Resolution referred to in Section 2.3. The Securities of each series shall bear interest, if any, from the date, and such interest shall be payable on the dates, established as contemplated by Section 2.3.

The person in whose name any Registered Security of any series is registered at the close of business on any record date applicable to a particular series with respect to any interest payment date for such series shall be entitled to receive the interest, if any, payable on such interest payment date notwithstanding any transfer or exchange of such Registered Security subsequent to the record date and prior to such interest payment date, except if and to the extent the Issuer shall default in the payment of the interest due on such interest payment date for such series, in which case such defaulted interest shall be paid to the persons in whose names Outstanding Registered Securities for such series are registered at the close of business on a subsequent record date (which shall be not less than five Business Days prior to the date of payment of such defaulted interest) established by notice given by mail by or on behalf of the

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Issuer to the Holders of Registered Securities not less than 15 days preceding such subsequent record date. The term "record date" as used with respect to any interest payment date (except a date for payment of defaulted interest) for the Securities of any series shall mean the date specified as such in the terms of the Registered Securities of such series established as contemplated by Section 2.3, or, if no such date is so established, if such interest payment date is the first day of a calendar month, the fifteenth day of the preceding calendar month or, if such interest payment date is the fifteenth day of a calendar month, the first day of such calendar month, whether or not such record date is a Business Day.

SECTION 2.8 REGISTRATION, TRANSFER AND EXCHANGE. (a) The Issuer will keep at each office or agency to be maintained for the purpose as provided in Section 3.2 for each series of Securities a register or registers in which, subject to such reasonable regulations as the Issuer may prescribe, it will provide for the registration of Registered Securities of such series and the registration of transfer of Registered Securities of such series. Such register shall be in written form in the English language or in any other form capable of being converted into such form within a reasonable time. At all reasonable times such register or registers shall be open for inspection by the Trustee.

Upon due presentation for registration of transfer of any Registered Security of any series at any such office or agency to be maintained for the purpose as provided in Section 3.2, the Issuer shall execute and the Trustee shall authenticate and deliver in the name of the transferee or transferees a new Registered Security or Registered Securities of the same series, maturity date, interest rate and original issue date in authorized denominations for a like aggregate principal amount.

Unregistered Securities (except for any temporary global Unregistered Securities) and Coupons (except for Coupons attached to any temporary global Unregistered Securities) shall be transferable by delivery.

At the option of the Holder thereof, Registered Securities of any series (other than a Registered Global Security, except as set forth below) may be exchanged for a Registered Security or Registered Securities of such series having authorized denominations and an equal aggregate principal amount, upon surrender of such Registered Securities to be exchanged at the agency of the Issuer that shall be maintained for such purpose in accordance with Section 3.2 and upon payment, if the Issuer shall so require, of the charges hereinafter provided. If the Securities of any series are issued in both registered and unregistered form, at the option of the Holder thereof, except as otherwise specified pursuant to Section 2.3, Unregistered Securities of any series may be exchanged for Registered Securities of such series having authorized denominations and an equal aggregate principal amount, upon surrender of such Unregistered Securities to be exchanged at the agency of the Issuer that shall be maintained for such purpose in accordance with Section 3.2, with, in the case of Unregistered Securities that have Coupons attached, all unmatured Coupons and all matured Coupons in default thereto appertaining, and upon payment, if the Issuer shall so require, of the charges hereinafter provided. At the option of the Holder thereof, if Unregistered Securities of any series, maturity date, interest rate and

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original issue date are issued in more than one authorized denomination, except as otherwise specified pursuant to Section 2.3, such Unregistered Securities may be exchanged for Unregistered Securities of such series having authorized denominations and an equal aggregate principal amount, upon surrender of such Unregistered Securities to be exchanged at the agency of the Issuer that shall be maintained for such purpose in accordance with Section 3.2 or as specified pursuant to Section 2.3, with, in the case of Unregistered Securities that have Coupons attached, all unmatured Coupons and all matured Coupons in default thereto appertaining, and upon payment, if the Issuer shall so require, of the charges hereinafter provided. Registered Securities of any series may not be exchanged for Unregistered Securities of such series unless (1) otherwise specified pursuant to Section 2.3 and (2) the Issuer has delivered to the Trustee an Opinion of Counsel that (x) the Issuer has received from the IRS a ruling or (y) since the date hereof, there has been a change in the applicable Federal income tax law, in either case to the effect that the inclusion of terms permitting Registered Securities to be exchanged for Unregistered Securities would result in no Federal income tax effect adverse to the Issuer or to any Holder. Whenever any Securities are so surrendered for exchange, the Issuer shall execute, and the Trustee shall authenticate and deliver, the Securities which the Holder making the exchange is entitled to receive. All Securities and Coupons, if any, surrendered upon any exchange or transfer provided for in this Indenture shall be promptly cancelled and disposed of by the Trustee, and the Trustee shall deliver a certificate of disposition thereof to the Issuer.

All Registered Securities presented for registration of transfer, exchange, redemption or payment shall (if so required by the Issuer or the Trustee) be duly endorsed, or be accompanied by a written instrument or instruments of transfer in form satisfactory to the Issuer and the Trustee duly executed, by the Holder or his attorney duly authorized in writing.

The Issuer may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any exchange or registration of transfer of Securities. No service charge shall be made for any such transaction.

The Issuer shall not be required to exchange or register a transfer of (a) any Securities of any series for a period of 15 days preceding the first mailing of notice of redemption of Securities of such series to be redeemed or (b) any Securities selected, called or being called for redemption, in whole or in part, except, in the case of any Security to be redeemed in part, the portion thereof not so to be redeemed.

Notwithstanding any other provision of this Section 2.8, unless and until it is exchanged in whole or in part for Securities in definitive registered form, a Registered Global Security representing all or a portion of the Securities of a series may not be transferred except as a whole by the Depositary for such series to a nominee of such Depositary or by a nominee of such Depositary to such Depositary or another nominee of such Depositary or by such Depositary or any such nominee to a successor Depositary for such series or a nominee of such successor Depositary.

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If at any time the Depositary for any Registered Securities of a series represented by one or more Registered Global Securities notifies the Issuer that it is unwilling or unable to continue as Depositary for such Registered Securities or if at any time the Depositary for such Registered Securities shall no longer be eligible under Section 2.4, the Issuer shall appoint a successor Depositary eligible under Section 2.4 with respect to such Registered Securities. If a successor Depositary eligible under Section 2.4 for such Registered Securities is not appointed by the Issuer within 90 days after the Issuer receives such notice or becomes aware of such ineligibility, the Issuer's election pursuant to Section 2.3 that such Registered Securities be represented by one or more Registered Global Securities shall no longer be effective and the Issuer will execute, and the Trustee, upon receipt of an Officer's Certificate for the authentication and delivery of definitive Securities of such series, will authenticate and deliver, Securities of such series in definitive registered form without coupons, in any authorized denominations, in an aggregate principal amount equal to the principal amount of the Registered Global Security or Securities representing such Registered Securities in exchange for such Registered Global Security or Securities.

The Issuer may at any time and in its sole discretion determine that the Registered Securities of any series issued in the form of one or more Registered Global Securities shall no longer be represented by a Registered Global Security or Securities. In such event the Issuer will execute, and the Trustee, upon receipt of any Officer's Certificate for the authentication and delivery of definitive Securities of such series, will authenticate and deliver, Securities of such series in definitive registered form without coupons, in any authorized denominations, in an aggregate principal amount equal to the principal amount of the Registered Global Security or Securities representing such Registered Securities, in exchange for such Registered Global Security or Securities.

If specified by the Issuer pursuant to Section 2.3 with respect to Securities represented by a Registered Global Security, the Depositary for such Registered Global Security may surrender such Registered Global Security in exchange in whole or in part for Securities of the same series in definitive registered form on such terms as are acceptable to the Issuer and such Depositary. Thereupon, the Issuer shall execute, and the Trustee shall authenticate and deliver, without service charge,

(i) to the Person specified by such Depositary a new Registered Security or Securities of the same series, of any authorized denominations as requested by such Person, in an aggregate principal amount equal to and in exchange for such Person's beneficial interest in the Registered Global Security; and

(ii) to such Depositary a new Registered Global Security in a denomination equal to the difference, if any, between the principal amount of the surrendered Registered Global Security and the aggregate principal amount of Registered Securities authenticated and delivered pursuant to clause (i) above.

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Upon the exchange of a Registered Global Security for Securities in definitive registered form without coupons, in authorized denominations, such Registered Global Security shall be cancelled by the Trustee or an agent of the Issuer or the Trustee. Securities in definitive registered form without coupons issued in exchange for a Registered Global Security pursuant to this Section 2.8 shall be registered in such names and in such authorized denominations as the Depositary for such Registered Global Security, pursuant to instructions from its direct or indirect participants or otherwise, shall instruct the Trustee or an agent of the Issuer or the Trustee. The Trustee or such agent shall deliver such Securities to or as directed by the Persons in whose names such Securities are so registered.

All Securities issued upon any transfer or exchange of Securities shall be valid obligations of the Issuer, evidencing the same debt, and entitled to the same benefits under this Indenture, as the Securities surrendered upon such transfer or exchange.

Notwithstanding anything herein or in the terms of any series of Securities to the contrary, none of the Issuer, the Trustee or any agent of the Issuer or the Trustee (any of which, other than the Issuer, shall rely on an Officer's Certificate and an Opinion of Counsel) shall be required to exchange any Unregistered Security for a Registered Security if such exchange would result in Federal income tax consequences adverse to the Issuer (such as, for example, the inability of the Issuer to deduct from its income, as computed for Federal income tax purposes, the interest payable on the Unregistered Securities) under then applicable United States Federal income tax laws.

(b)(i) Securities that are distributed to QIBs will be represented by a global Security (the "144A Global Security"). Securities that are distributed to Non-U.S. Persons will be represented by a global Security (the "Regulation S Global Security"). Each of the 144A Global Security and the Regulation S Global Security shall be referred to herein as a "Global Security." If Global Securities are issued, transfers of interests in the Securities between the 144A Global Security and the Regulation S Global Security will be made in accordance with the standing instructions and procedures of the Depositary and its participants and the Trustee shall make appropriate endorsements to reflect increases or decreases in the principal amounts of such Global Securities to reflect any such transfers.

Except as provided below, beneficial owners of a Security in global form shall not be entitled to have certificates registered in their names, will not receive or be entitled to receive physical delivery of certificates in definitive form and will not be considered Holders of such Securities in global form.

(ii) So long as the Securities are eligible for book-entry settlement, and to the extent that Securities are held by QIBs or Non-U.S. Persons, as the case may be, in a Global Security, or unless otherwise required by law, upon any transfer of a definitive Security to a QIB in accordance with Rule 144A or to a Non-U.S. Person in accordance with Regulation S, unless otherwise requested by the transferor, and upon receipt of the definitive Security or Securities being so transferred, together with a certification from the transferor that the transfer is being

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made in compliance with Rule 144A or Regulation S, as the case may be (or other evidence satisfactory to the Trustee), the Trustee shall make an endorsement on any 144A Global Security or any Regulation S Global Security, as the case may be, to reflect an increase in the aggregate principal amount of the Securities represented by such Global Security, and the Trustee shall cancel such definitive Security or Securities in accordance with the standing instructions and procedures of the Depositary, the aggregate principal amount of Securities represented by such Global Security to be increased accordingly; provided that no definitive Security, or portion thereof, in respect of which the Issuer or an Affiliate of the Issuer held any beneficial interest shall be included in such Global Security until such definitive Security is freely tradable in accordance with Rule 144K; provided further that the Trustee shall, at the written request of the Issuer, issue Securities in definitive form upon any transfer of a beneficial interest in the Global Security to the Issuer or any Affiliate of the Issuer.

Any Global Security may be endorsed with or have incorporated in the text thereof such legends or recitals or changes not inconsistent with the provisions of this Indenture as may be required by the Depositary, by the New York Stock Exchange or by the National Association of Securities Dealers, Inc. in order for the Securities to be tradeable on the PORTAL Market or as may be required for the Securities to be tradeable on any other market developed for trading of securities pursuant to Rule 144A or required to comply with any applicable law or any regulation thereunder or with the rules and regulations of any securities exchange upon which the Securities may be listed or traded or to conform with any usage with respect thereto, or to indicate any special limitations or restrictions to which any particular Securities are subject.

(iii)Each Security that bears or is required to bear the legend set forth in this Section 2.8(b) (a "Restricted Security") shall be subject to the restrictions on transfer provided in the legend set forth in this
Section 2.8(b), unless such restrictions on transfer shall be waived by the written consent of the Issuer, and the Holder of each Restricted Security, by such Holder's acceptance thereof, agrees to be bound by such restrictions on transfer. As used in this Section 2.8(b), the term "transfer" encompasses any sale, pledge, transfer or other disposition of any Restricted Security.

Prior to the Transfer Restriction Termination Date, any certificate evidencing a Security shall bear a legend in substantially the following form, unless otherwise agreed by the Issuer (with written notice thereof to the Trustee):

THE SECURITY EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) OR (B) IT IS AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS

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DEFINED IN RULE 50l(A)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT) ("INSTITUTIONAL ACCREDITED INVESTOR") OR (C) IT IS NOT A U.S. PERSON AND IS ACQUIRING THE SECURITY EVIDENCED HEREBY IN AN OFFSHORE TRANSACTION, (2) AGREES THAT IT WILL NOT PRIOR TO THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT (OR ANY SUCCESSOR PROVISION), RESELL OR OTHERWISE TRANSFER THE SECURITY EVIDENCED HEREBY EXCEPT (A) TO McKESSON CORPORATION (THE "COMPANY") OR ANY SUBSIDIARY THEREOF, (B) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, (C) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (D) TO AN INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH TRANSFER, FURNISHES TO THE TRUSTEE FOR THE SECURITIES A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THE SECURITY EVIDENCED HEREBY (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM SUCH TRUSTEE), (E) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT OR (F) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE SECURITY EVIDENCED HEREBY IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THE SECURITY EVIDENCED HEREBY PRIOR TO THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT (OR ANY SUCCESSOR PROVISION), THE HOLDER MUST CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO THE TRUSTEE FOR THE SECURITIES. IF THE PROPOSED TRANSFEREE IS AN INSTITUTIONAL ACCREDITED INVESTOR OR A PURCHASER WHO IS NOT A U.S. PERSON, THE HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE TRUSTEE FOR THE SECURITIES SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS THE COMPANY OR THE TRUSTEE MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. THIS LEGEND WILL BE REMOVED AFTER THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT. AS USED HEREIN, THE TERMS "OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT.

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Following the Transfer Restriction Termination Date, any Security or security issued in exchange or substitution therefor (other than Securities acquired by the Issuer or any Affiliate thereof since the issue date of the Securities) may upon surrender of such Security for exchange to the registrar in accordance with the provisions of this Section 2.8, be exchanged for a new Security or Securities, of like tenor and aggregate principal amount, which shall not bear the restrictive legend required by this Section 2.8(b).

SECTION 2.9 MUTILATED, DEFACED, DESTROYED, LOST AND STOLEN SECURITIES. In case any temporary or definitive Security or any Coupon appertaining to any Security shall be mutilated, defaced, destroyed, lost or stolen, the Issuer in its discretion may execute and, upon the written request of any officer of the Issuer, the Trustee shall authenticate and deliver, a new Security of the same series, maturity date, interest rate and original issue date, bearing a number or other distinguishing symbol not contemporaneously outstanding, in exchange and substitution for the mutilated or defaced Security, or in lieu of and in substitution for the Security so destroyed, lost or stolen with Coupons corresponding to the Coupons appertaining to the Securities so mutilated, defaced, destroyed, lost or stolen, or in exchange or substitution for the Security to which such mutilated, defaced, destroyed, lost or stolen Coupon appertained, with Coupons appertaining thereto corresponding to the Coupons so mutilated, defaced, destroyed, lost or stolen. In every case the applicant for a substitute Security or Coupon shall furnish to the Issuer and to the Trustee and any agent of the Issuer or the Trustee such security or indemnity as may be required by them to indemnify and defend and to save each of them harmless and, in every case of destruction, loss or theft, evidence to their satisfaction of the destruction, loss or theft of such Security or Coupon and of the ownership thereof, and in the case of mutilation or defacement shall surrender the Security and related Coupons to the Trustee or such agent.

Upon the issuance of any substitute Security or Coupon, the Issuer may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the Trustee) or its agent connected therewith. In case any Security or Coupon which has matured or is about to mature or has been called for redemption in full shall become mutilated or defaced or be destroyed, lost or stolen, the Issuer may instead of issuing a substitute Security, pay or authorize the payment of the same or the relevant Coupon (without surrender thereof except in the case of a mutilated or defaced Security or Coupon), if the applicant for such payment shall furnish to the Issuer and to the Trustee and any agent of the Issuer or the Trustee such security or indemnity as any of them may require to save each of them harmless, and, in every case of destruction, loss or theft, the applicant shall also furnish to the Issuer and the Trustee and any agent of the Issuer or the Trustee evidence to their satisfaction of the destruction, loss or theft of such Security or Coupons and of the ownership thereof.

Every substitute Security or Coupon of any series issued pursuant to the provisions of this Section by virtue of the fact that any such Security or Coupon is destroyed, lost or stolen shall constitute an additional contractual obligation of the Issuer, whether or not the destroyed, lost or stolen Security or Coupon shall be at any time enforceable by anyone and

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shall be entitled to all the benefits of (but shall be subject to all the limitations of rights set forth in) this Indenture equally and proportionately with any and all other Securities or Coupons of such series duly authenticated and delivered hereunder. All Securities and Coupons shall be held and owned upon the express condition that, to the extent permitted by law, the foregoing provisions are exclusive with respect to the replacement or payment of mutilated, defaced or destroyed, lost or stolen Securities and Coupons and shall preclude any and all other rights or remedies notwithstanding any law or statute existing or hereafter enacted to the contrary with respect to the replacement or payment of negotiable instruments or other securities without their surrender.

SECTION 2.10 CANCELLATION OF SECURITIES; DESTRUCTION THEREOF. All Securities and Coupons surrendered for payment, redemption, registration of transfer or exchange, or for credit against any payment in respect of a sinking or analogous fund, if any, if surrendered to the Issuer or any agent of the Issuer or the Trustee or any agent of the Trustee, shall be delivered to the Trustee or its agent for cancellation or, if surrendered to the Trustee, shall be cancelled by it; and no Securities or Coupons shall be issued in lieu thereof except as expressly permitted by any of the provisions of this Indenture. The Trustee or its agent shall dispose of cancelled Securities and Coupons held by it and deliver a certificate of disposition to the Issuer. If the Issuer or its agent shall acquire any of the Securities or Coupons, such acquisition shall not operate as a redemption or satisfaction of the indebtedness represented by such Securities or Coupons unless and until the same are delivered to the Trustee or its agent for cancellation.

SECTION 2.11 TEMPORARY SECURITIES. Pending the preparation of definitive Securities for any series, the Issuer may execute and the Trustee shall authenticate and deliver temporary Securities for such series (printed, lithographed, typewritten or otherwise reproduced, in each case in form satisfactory to the Trustee). Temporary Securities of any series shall be issuable as Registered Securities without coupons, or as Unregistered Securities with or without coupons attached thereto, of any authorized denomination, and substantially in the form of the definitive Securities of such series but with such omissions, insertions and variations as may be appropriate for temporary Securities, all as may be determined by the Issuer with the concurrence of the Trustee as evidenced by the execution and authentication thereof. Temporary Securities may contain such references to any provisions of this Indenture as may be appropriate. Every temporary Security shall be executed by the Issuer and be authenticated by the Trustee upon the same conditions and in substantially the same manner, and with like effect, as the definitive Securities. Without unreasonable delay the Issuer shall execute and shall furnish definitive Securities of such series and thereupon temporary Registered Securities of such series may be surrendered in exchange therefor without charge at each office or agency to be maintained by the Issuer for that purpose pursuant to Section 3.2 and, in the case of Unregistered Securities, at any agency maintained by the Issuer for such purpose as specified pursuant to Section 2.3, and the Trustee shall authenticate and deliver in exchange for such temporary Securities of such series an equal aggregate principal amount of definitive Securities of the same series having authorized denominations and, in the case of Unregistered Securities, having attached thereto any appropriate Coupons. Until so exchanged, the temporary

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Securities of any series shall be entitled to the same benefits under this Indenture as definitive Securities of such series, unless otherwise established pursuant to Section 2.3. The provisions of this Section are subject to any restrictions or limitations on the issue and delivery of temporary Unregistered Securities of any series that may be established pursuant to Section 2.3 (including any provision that Unregistered Securities of such series initially be issued in the form of a single global Unregistered Security to be delivered to a depositary or agency located outside the United States and the procedures pursuant to which definitive or global Unregistered Securities of such series would be issued in exchange for such temporary global Unregistered Security).

ARTICLE III

COVENANTS OF THE ISSUER

SECTION 3.1 PAYMENT OF PRINCIPAL AND INTEREST. The Issuer covenants and agrees for the benefit of each series of Securities that it will duly and punctually pay or cause to be paid the principal of, and interest on, if any, each of the Securities of such series (together with any additional amounts payable pursuant to the terms of such Securities) at the place or places, at the respective time or times and in the manner provided in such Securities and in the Coupons, if any, appertaining thereto and in this Indenture. The interest on Securities with Coupons attached (together with any additional amounts payable pursuant to the terms of such Securities) shall be payable only upon presentation and surrender of the several Coupons for such interest installments as are evidenced thereby as they severally mature. If any temporary Unregistered Security provides that interest thereon may be paid while such Security is in temporary form, the interest on any such temporary Unregistered Security (together with any additional amounts payable pursuant to the terms of such Security) shall be paid, as to the installments of interest evidenced by Coupons attached thereto, if any, only upon presentation and surrender thereof, and, as to the other installments of interest, if any, only upon presentation of such Securities for notation thereon of the payment of such interest, in each case subject to any restrictions that may be established pursuant to Section 2.3. The interest, if any, on Registered Securities (together with any additional amounts payable pursuant to the terms of such Securities) shall be payable only to or upon the written order of the Holders thereof and, at the option of the Issuer, may be paid by wire transfer or by mailing checks for such interest payable to or upon the written order of such Holders at their last addresses as they appear on the Securities register of the Issuer.

SECTION 3.2 OFFICES FOR PAYMENTS, ETC. So long as any Registered Securities are authorized for issuance pursuant to this Indenture or are outstanding hereunder, the Issuer will maintain in the Borough of Manhattan, The City of New York, an office or agency where the Registered Securities of each series may be presented for payment, where the Securities of each series may be presented for exchange as is provided in this Indenture and, if applicable, pursuant to Section 2.3 and where the Registered Securities of each series may be presented for registration of transfer as in this Indenture provided.

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The Issuer will maintain one or more offices or agencies in a city or cities located outside the United States (including any city in which such an agency is required to be maintained under the rules of any stock exchange on which the Securities of such series are listed) where the Unregistered Securities, if any, of each series and Coupons, if any, appertaining thereto may be presented for payment. No payment on any Unregistered Security or Coupon will be made upon presentation of such Unregistered Security or Coupon at an agency of the Issuer within the United States nor will any payment be made by transfer to an account in, or by mail to an address in, the United States unless pursuant to applicable United States laws and regulations then in effect such payment can be made without tax consequences adverse to the Issuer. Notwithstanding the foregoing, payments in Dollars of Unregistered Securities of any series and Coupons appertaining thereto which are payable in Dollars may be made at an agency of the Issuer maintained in the Borough of Manhattan, The City of New York if such payment in Dollars at each agency maintained by the Issuer outside the United States for payment on such Unregistered Securities is illegal or effectively precluded by exchange controls or other similar restrictions.

The Issuer will maintain in the Borough of Manhattan, The City of New York, an office or agency where notices and demands to or upon the Issuer in respect of the Securities of any series, the Coupons appertaining thereto or this Indenture may be served.

The Issuer will give to the Trustee written notice of the location of each such office or agency and of any change of location thereof. In case the Issuer shall fail to maintain any agency required by this Section to be located in the Borough of Manhattan, The City of New York, or shall fail to give such notice of the location or for any change in the location of any of the above agencies, presentations and demands may be made and notices may be served at the Corporate Trust Office of the Trustee.

The Issuer may from time to time designate one or more additional offices or agencies where the Securities of a series and any Coupons appertaining thereto may be presented for payment, where the Securities of that series may be presented for exchange as provided in this Indenture and pursuant to Section 2.3 and where the Registered Securities of that series may be presented for registration of transfer as in this Indenture provided, and the Issuer may from time to time rescind any such designation, as the Issuer may deem desirable or expedient; provided, that no such designation or rescission shall in any manner relieve the Issuer of its obligations to maintain the agencies provided for in this Section. The Issuer shall give to the Trustee prompt written notice of any such designation or rescission thereof.

SECTION 3.3 APPOINTMENT TO FILL A VACANCY IN OFFICE OF TRUSTEE. The Issuer, whenever necessary to avoid or fill a vacancy in the office of Trustee, will appoint, in the manner provided in Section 6.10, a Trustee, so that there shall at all times be a Trustee with respect to each series of Securities hereunder.

SECTION 3.4 PAYING AGENTS. Whenever the Issuer shall appoint a paying agent other than the Trustee with respect to the Securities of any series, it will cause such paying

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agent to execute and deliver to the Trustee an instrument in which such agent shall agree with the Trustee, subject to the provisions of this Section,

(a) that it will hold all sums received by it as such agent for the payment of the principal of or interest on the Securities of such series (whether such sums have been paid to it by the Issuer or by any other obligor on the Securities of such series) in trust for the benefit of the Holders of the Securities of such series, or Coupons appertaining thereto, if any, or of the Trustee;

(b) that it will give the Trustee notice of any failure by the Issuer (or by any other obligor on the Securities of such series) to make any payment of the principal of or interest on the Securities of such series when the same shall be due and payable; and

(c) that it will pay any such sums so held in trust by it to the Trustee upon the Trustee's written request at any time during the continuance of the failure referred to in the foregoing clause (b).

The Issuer will, on or prior to each due date of the principal of or interest on the Securities of such series, deposit with the paying agent a sum sufficient to pay such principal or interest so becoming due, and (unless such paying agent is the Trustee) the Issuer will promptly notify the Trustee of any failure to take such action.

If the Issuer shall act as its own paying agent with respect to the Securities of any series, it will, on or before each due date of the principal of or interest on the Securities of such series, set aside, segregate and hold in trust for the benefit of the Holders of the Securities of such series or the Coupons appertaining thereto a sum sufficient to pay such principal or interest so becoming due. The Issuer will promptly notify the Trustee of any failure to take such action.

Anything in this Section to the contrary notwithstanding, but subject to Section 10.1, the Issuer may at any time, for the purpose of obtaining a satisfaction and discharge with respect to one or more or all series of Securities hereunder, or for any other reason, pay or cause to be paid to the Trustee all sums held in trust for any such series by the Issuer or any paying agent hereunder, as required by this Section, such sums to be held by the Trustee upon the trusts herein contained.

Anything in this Section to the contrary notwithstanding, the agreement to hold sums in trust as provided in this Section is subject to the provisions of Sections 10.3 and 10.4.

SECTION 3.5 COMPLIANCE CERTIFICATES. The Issuer will furnish to the Trustee on or before January 31 in each year (beginning with January 31, 1998) a brief certificate (which need not comply with Section 11.5) from the principal executive, financial or accounting officer of the Issuer stating that in the course of the performance by the signer of his or her duties as an officer of the Issuer he or she would normally have knowledge of any default or non-compliance by the Issuer in the performance of any covenants or conditions contained

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in this Indenture, stating whether or not he or she has knowledge of any such default or non-compliance and, if so, describing each such default or non-compliance of which the signer has knowledge and the nature thereof.

SECTION 3.6 CORPORATE EXISTENCE. Subject to Article IX, the Issuer will do or cause to be done all things necessary to preserve and keep in full force and effect its corporate existence and the rights (charter and statutory), licenses and franchises of the Issuer and its Subsidiaries; provided, that the Issuer shall not be required to preserve any such right, license or franchise, if, in the judgment of the Issuer, the preservation thereof is no longer desirable in the conduct of the business of the Issuer and its Subsidiaries taken as a whole and the loss thereof is not disadvantageous in any material respect to the Securityholders.

SECTION 3.7 MAINTENANCE OF PROPERTIES. The Issuer will cause all properties used in or useful in the conduct of its business or the busi ess of any Subsidiary to be maintained and kept in good condition, repair, and working order and supplied with all necessary equipment and will cause to be made all necessary repairs, renewals, replacements, betterments and improvements thereof, all as in the judgment of the Issuer may be necessary, so that the business carried on in connection therewith may be properly and advantageously conducted at all time except to the extent that the Issuer may be prevented from so doing by circumstances beyond its control; provided, that nothing in this
Section shall prevent the Issuer from discontinuing the operation or maintenance of any of such properties, or disposing of any of them, if such discontinuance or disposal is, in the judgment of the Issuer desirable in the conduct of the business of the Issuer or any Subsidiary and not disadvantageous in any material respect to the Securityholders.

SECTION 3.8 PAYMENT OF TAXES AND OTHER CLAIMS. The Issuer will pay or discharge or cause to be paid or discharged, before the same shall become delinquent: (a) all taxes, assessments and governmental charges levied or imposed upon the Issuer or any Subsidiary or upon the income, profits or property of the Issuer or any Subsidiary; and (b) all lawful claims for labor, materials, and supplies, which, if unpaid, might by law become a lien upon the property of the Issuer or any Subsidiary; provided, that the Issuer shall not be required to pay or discharge or cause to be paid or discharged any such tax, assessment, charge or claim whose amount, applicability or validity is being contested in good faith by appropriate proceedings; and provided further that the Issuer shall not be required to cause to be paid or discharged any such tax, assessment, charge or claim if the Issuer shall determine that such payment is not advantageous to the conduct of the business of the Issuer and its Subsidiaries taken as a whole and that the failure so to pay or discharge is not disadvantageous in any material respect to the Securityholders.

SECTION 3.9 LUXEMBOURG PUBLICATIONS. In the event of the publication of any notice pursuant to Section 5.11, 6.10(a), 6.11, 8.2, 10.4 or 12.2, the party making such publication in the Borough of Manhattan, The City of New York and London shall also, to the extent that notice is required to be given to Holders of Securities of any series by

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applicable Luxembourg law or stock exchange regulation, as evidenced by an Officer's Certificate delivered to such party, make a similar publication in Luxembourg.

ARTICLE IV

SECURITYHOLDER LISTS AND REPORTS BY THE
ISSUER AND THE TRUSTEE

SECTION 4.1 ISSUER TO FURNISH TRUSTEE INFORMATION AS TO NAMES AND ADDRESSES OF SECURITYHOLDERS. If and so long as the Trustee shall not be the Security registrar for the Securities of any series, the Issuer and any other obligor on the Securities will furnish or cause to be furnished to the Trustee a list in such form as the Trustee may reasonably require of the names and addresses of the Holders of the Registered Securities of such series pursuant to Section 312 of the Trust Indenture Act:

(a) semi-annually not more than 5 days after each record date for the payment of interest on such Registered Securities, as hereinabove specified, as of such record date and on dates to be determined pursuant to Section 2.3 for non-interest bearing Registered Securities in each year; and

(b) at such other times as the Trustee may reasonably request in writing, within thirty days after receipt by the Issuer of any such request as of a date not more than 15 days prior to the time such information is furnished.

SECTION 4.2 REPORTS BY THE ISSUER. The Issuer covenants to file with the Trustee, within 15 days after the Issuer is required to file the same with the Commission, copies of the annual reports and of the information, documents, and other reports that the Issuer may be required to file with the Commission pursuant to Section 13 or Section 15(d) of the Exchange Act or pursuant to Section 314 of the Trust Indenture Act.

SECTION 4.3 REPORTS BY THE TRUSTEE.

(a) On or before the first July 15 which occurs not less than 60 days after the earliest date of issuance of any Securities and on or before July 15 in each year thereafter, so long as any Securities are Outstanding hereunder, the Trustee shall transmit by mail as provided below to the Securityholders of each series of outstanding Securities, as hereinafter in this Section provided, a brief report dated as of the preceding May 15 with respect to:

(i) its eligibility under Section 6.10 and its qualification under Section 6.9, or in lieu thereof, if to the best of its knowledge it has continued to be eligible and qualified under such Sections, a written statement to such effect;

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(ii) the character and amount of any advances (and if the Trustee elects to so state, the circumstances surrounding the making thereof) made by the Trustee (as such) which remain unpaid on the date of such report and for the reimbursement of which it claims or may claim a lien or charge, prior to that of the Securities of such series, on any property or funds held or collected by it as Trustee, except that the Trustee shall not be required (but may elect) to report such advances if such advances so remaining unpaid aggregate not more than 0.5% of the principal of the Securities of such series outstanding on the date of such report;

(iii) the amount, interest rate and maturity date of all other indebtedness owing by the Issuer (or any other obligor on the Securities of such series) to the Trustee in its individual capacity on the date of such report, with a brief description of any property held as collateral security therefor, except any indebtedness based upon a creditor relationship;

(iv) the property and funds, if any, physically in the possession of the Trustee (as such) in respect of the Securities of such series on the date of such report;

(v) any additional issue of Securities of such series which the Trustee has not previously reported; and

(vi) any action taken by the Trustee in the performance of its duties under this Indenture which the Trustee has not previously reported and which in the Trustee's opinion materially affects the Securities of such series, except action in respect of a default, notice of which has been or is to be withheld by it in accordance with the provisions of Section 5.11.

(b) The Trustee shall transmit to the Securityholders of each series, as provided in subsection (c) of this Section, a brief report with respect to the character and amount of any advances (and if the Trustee elects so to state, the circumstances surrounding the making thereof) made by the Trustee (as such) in respect of the Securities of such series since the date of the last report transmitted pursuant to the provisions of subsection (a) of this Section (or if no such report has yet been so transmitted, since the date of this Indenture) for the reimbursement of which it claims or may claim a lien or charge prior to that of the Securities of such series on property or funds held or collected by it as Trustee and which it has not previously reported pursuant to this subsection (b), except that the Trustee shall not be required (but may elect) to report such advances if such advances remaining unpaid at any time aggregate 10% or less of the principal amount of Securities of such series outstanding at such time, such report to be transmitted within 90 days after such time.

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(c) Reports pursuant to this Section shall be transmitted by mail to all Holders of Securities of such series, as the names and addresses of such Holders appear upon the Securities register as of a date not more than 15 days prior to the mailing thereof.

(d) A copy of each such report shall, at the time of such transmission to Securityholders, be furnished to the Issuer and be filed by the Trustee with each stock exchange upon which the Securities of such series are listed and also with the Commission. The Issuer agrees to notify the Trustee when and as Securities of any series become listed on any national securities exchange.

ARTICLE V

REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
ON EVENT OF DEFAULT

SECTION 5.1 EVENT OF DEFAULT DEFINED, ACCELERATION OF MATURITY; WAIVER OF DEFAULT. "Event of Default" with respect to Securities of any series, wherever used herein, means each one of the following events which shall have occurred and be continuing (whatever the reason for such Event of Default and whether it shall be voluntary or involuntary or be effected by operation of law or pursuant to any judgment, decree or order of any court or any order, rule or regulation of any administrative or governmental body):

(a) default in the payment of any installment of interest upon any of the Securities of such series as and when the same shall become due and payable, and continuance of such default for a period of 30 days; or

(b) default in the payment of all or any part of the principal on any of the Securities of such series as and when the same shall become due and payable either at maturity, upon any redemption, by declaration or otherwise; or

(c) default in the payment of any sinking fund installment as and when the same shall become due and payable by the terms of the Securities of such series; or

(d) failure on the part of the Issuer duly to observe or perform any other of the covenants or agreements on the part of the Issuer in the Securities of such series or contained in this Indenture (other than a covenant or agreement included in this Indenture solely for the benefit of a series of Securities other than such series) for a period of 60 days after the date on which written notice specifying such failure, stating that such notice is a "Notice of Default" hereunder and demanding that the Issuer remedy the same, shall have been given by registered or certified mail, return receipt requested, to the Issuer by the Trustee, or to the Issuer and the Trustee by the holders of at least 25% in aggregate principal amount of the Outstanding Securities of the series to which such covenant or agreement relates; or

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(e) a court having jurisdiction in the premises shall enter a decree or order for relief in respect of the Issuer in an involuntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or appointing a receiver, liquidator, assignee, custodian, trustee, sequestrator (or similar official) of the Issuer for any substantial part of its or their property or ordering the winding up or liquidation of its or their affairs, and such decree or order shall remain unstayed and in effect for a period of 60 consecutive days; or

(f) the Issuer shall commence a voluntary case under any applicable bankruptcy, insolvency or other similar law now or hereafter in effect, or consent to the entry of an order for relief in an involuntary case under any such law, or consent to the appointment or taking possession by a receiver, liquidator, assignee, custodian, trustee, sequestrator (or similar official) of the Issuer or for any substantial part of its or their property, or make any general assignment for the benefit of creditors; or

(g) any other Event of Default provided in the supplemental indenture or Board Resolution under which such series of Securities is issued or in the form of Security for such series.

If an Event of Default described in clause (a), (b), (c), (d) or (g) (if the Event of Default under clause (d) or (g), as the case may be, is with respect to less than all series of Securities then Outstanding) occurs and is continuing, then, and in each and every such case, except for any series of Securities the principal of which shall have already become due and payable, either the Trustee or the Holders of not less than 25% in aggregate principal amount of the Securities of each such affected series then Outstanding hereunder (each such series voting as a separate class) by notice in writing to the Issuer (and to the Trustee if given by Securityholders), may declare the entire principal (or, if the Securities of any such affected series are Original Issue Discount Securities, such portion of the principal amount as may be specified in the terms of such series) of all Securities of all such affected series, and the interest accrued thereon, if any, to be due and payable immediately, and upon any such declaration, the same shall become immediately due and payable.

If an Event of Default described in clause (d) or (g) above with respect to all series of Securities then Outstanding, or an Event of Default described in clause (e) or (f) above occurs and is continuing, then, and in each and every such case, unless the Principal of all of the Securities shall have already become due and payable, either the Trustee or the Holders of not less than 25% in aggregate principal amount of all of the Securities then Outstanding hereunder (treated as one class) by notice in writing to the Issuer (and to the Trustee if given by Securityholders), may declare the entire principal (or, if the Securities of any series are Original Issue Discount Securities, such portion of the principal amount as may be specified in the terms of such series) of all of the Securities then Outstanding, and the interest accrued thereon, if any, to be due and payable immediately, and upon such declaration, the same shall become immediately due and payable.

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The foregoing provisions are subject to the condition that if, at any time after the principal (or, if the Securities are Original Issue Discount Securities, such portion of the principal as may be specified in the terms thereof) of the Securities of any series (or of all the Securities, as the case may be) shall have been so declared due and payable, and before any judgment or decree for the payment of the moneys due shall have been obtained or entered as hereinafter provided,

(A) the Issuer shall pay or shall deposit with the Trustee a sum sufficient to pay

(i) all matured installments of interest upon all the Securities of each such series (or all the Securities, as the case may be); and

(ii) the principal of any and all Securities of each such series (or of all the Securities, as the case may be) which shall have become due otherwise than by acceleration; and

(iii) interest upon such principal and, to the extent that payment of such interest is enforceable under applicable law, on overdue installments of interest, at the same rate as the rate of interest or Yield to Maturity (in the case of Original Issue Discount Securities) specified in the Securities of each such series (or at the respective rates of interest or Yields to Maturity of all the Securities, as the case may be) to the date of such payment or deposit; and

(iv) all amounts payable to the Trustee pursuant to
Section 6.6; and

(B) all Events of Default under the Indenture, other than the non-payment of the principal of Securities which shall have become due by acceleration, shall have been cured, waived or otherwise remedied as provided herein,

then and in every such case the Holders of a majority in aggregate principal amount of all the Securities of each such series, each such series voting as a separate class (or of all the Securities, as the case may be, voting as a single class), then Outstanding, by written notice to the Issuer and to the Trustee, may waive all defaults with respect to each such series (or with respect to all the Securities, as the case may be) and rescind and annul such declaration and its consequences, but no such waiver or rescission and annulment shall extend to or shall affect any subsequent default or shall impair any right consequent thereon.

For all purposes under this Indenture, if a portion of the principal of any Original Issue Discount Securities shall have been accelerated and declared due and payable pursuant to the provisions hereof, then, from and after such declaration, unless such declaration has been rescinded and annulled, the principal amount of such Original Issue Discount Securities shall be deemed, for all purposes hereunder, to be such portion of the principal thereof as shall be due and payable as a result of such acceleration, and payment of such portion of the principal thereof as shall be due and payable as a result of such acceleration, together with interest, if any,

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thereon and all other amounts owing thereunder, shall constitute payment in full of such Original Issue Discount Securities.

SECTION 5.2 COLLECTION OF INDEBTEDNESS BY TRUSTEE; TRUSTEE MAY PROVE DEBT. The Issuer covenants that (a) in case default shall be made in the payment of any installment of interest on any of the Securities of any series when such interest shall have become due and payable, and such default shall have continued for a period of 30 days, or (b) in case default shall be made in the payment of all or any part of the principal of any of the Securities of any series when the same shall have become due and payable, whether upon maturity of the Securities of such series or upon any redemption or by declaration or otherwise, then upon demand of the Trustee, the Issuer will pay to the Trustee for the benefit of the Holders of the Securities of such series the whole amount that then shall have become due and payable on all Securities of such series, and such Coupons, for principal and interest, as the case may be (with interest to the date of such payment upon the overdue principal and, to the extent that payment of such interest is enforceable under applicable law, on overdue installments of interest at the same rate as the rate of interest or Yield to Maturity (in the case of Original Issue Discount Securities) specified in the Securities of such series); and in addition thereto, such further amount as shall be sufficient to cover the costs and expenses of collection, and such other amount due the Trustee under Section 6.6 in respect of Securities of such series.

Until such demand is made by the Trustee, the Issuer may pay the principal of and interest on the Securities of any series to the registered Holders, whether or not the Securities of such series be overdue.

In case the Issuer shall fail forthwith to pay such amounts upon such demand, the Trustee, in its own name as trustee of an express trust, shall be entitled and empowered to institute any action or proceedings at law or in equity for the collection of the sums so due and unpaid, and may prosecute any such action or proceedings to judgment or final decree, and may enforce any such judgment or final decree against the Issuer or other obligor upon the Securities and collect in the manner provided by law out of the property of the Issuer or other obligor upon the Securities, wherever situated, all the moneys adjudged or decreed to be payable.

In case there shall be pending proceedings relative to the Issuer or any other obligor upon the Securities under Title 11 of the United States Code or any other applicable Federal or state bankruptcy, insolvency or other similar law, or in case a receiver, assignee or trustee in bankruptcy or reorganization, liquidator, sequestrator or similar official shall have been appointed for or taken possession of the Issuer or its property or such other obligor, or in case of any other comparable judicial proceedings relative to the Issuer or other obligor upon the Securities, or to the creditors or property of the Issuer or such other obligor, the Trustee, irrespective of whether the principal of the Securities shall then be due and payable as therein expressed or by declaration or otherwise and irrespective of whether the Trustee shall have made any demand pursuant to the provisions of this Section, shall be entitled and empowered, by intervention in such proceedings or otherwise:

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(a) to file and prove a claim or claims for the whole amount of principal and interest (or, if the Securities of any series are Original Issue Discount Securities, such portion of the principal amount as may be specified in the terms of such series) owing and unpaid in respect of the Securities of any series, and to file such other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for amounts payable to the Trustee under Section 6.6) and of the Securityholders allowed in any judicial proceedings relative to the Issuer or other obligor upon the Securities, or to the creditors or property of the Issuer or such other obligor; and

(b) unless prohibited by applicable law and regulations, to vote on behalf of the holders of the Securities of any series in any election of a receiver, assignee, trustee or a standby trustee in arrangement, reorganization, liquidation or other bankruptcy or insolvency proceedings, custodian or other person performing similar functions in respect of any such proceedings; and

(c) to collect and receive any moneys or other property payable or deliverable on any such claims, and to distribute all amounts received with respect to the claims of the Securityholders and of the Trustee on their behalf; and any trustee, receiver, or liquidator, custodian or other similar official performing similar functions in respect of any such proceedings is hereby authorized by each of the Securityholders to make payments to the Trustee, and, in the event that the Trustee shall consent to the making of payments directly to the Securityholders, to pay to the Trustee its costs and expenses of collection and all other amounts due to it pursuant to
Section 6.6.

Nothing herein contained shall be deemed to authorize the Trustee to authorize or consent to or vote for or accept or adopt on behalf of any Securityholder any plan of reorganization, arrangement, adjustment or composition affecting the Securities of any series or the rights of any Holder thereof, or to authorize the Trustee to vote in respect of the claim of any Securityholder in any such proceeding, except as aforesaid in clause (b).

All rights of action and of asserting claims under this Indenture, or under any of the Securities of any series or Coupons appertaining to such Securities, may be enforced by the Trustee without the possession of any of the Securities of such series or Coupons appertaining to such Securities or the production thereof in any trial or other proceedings relative thereto, and any such action or proceedings instituted by the Trustee shall be brought in its own name as trustee of an express trust, and any recovery of judgment shall awarded to the Trustee for ratable distribution to the Holders of the Securities or Coupons appertaining to such Securities in respect of which such action was taken, after payment of all sums due to the Trustee under Section 6.6 in respect of such Securities.

In any proceedings brought by the Trustee (and also any proceedings involving the interpretation of any provision of this Indenture to which the Trustee shall be a party) the Trustee shall be held to represent all the Holders of the Securities or Coupons appertaining to

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such Securities in respect to which such action was taken, and it shall not be necessary to make any Holders of such Securities or Coupons appertaining to such Securities parties to any such proceedings.

SECTION 5.3 APPLICATION OF PROCEEDS. Any moneys collected by the Trustee pursuant to this Article in respect of any series shall be applied in the following order at the date or dates fixed by the Trustee and, in case of the distribution of such moneys on account of principal or interest, upon presentation of the several Securities and Coupons appertaining to such Securities in respect of which monies have been collected and stamping (or otherwise noting) thereon the payment, or issuing Securities of such series in reduced principal amounts in exchange for the presented Securities of like series if only partially paid, or upon surrender thereof if fully paid:

FIRST: To the payment of costs and expenses applicable to such series of Securities in respect of which monies have been collected, including all amounts due to the Trustee and each predecessor Trustee pursuant to Section 6.6 in respect to such series of Securities;

SECOND: In case the principal of the Securities of such series in respect of which moneys have been collected shall not have become and be then due and payable, to the payment of interest on the Securities of such series in default in the order of the maturity of the installments on such interest, with interest (to the extent that such interest has been collected by the Trustee and is permitted by applicable law) upon the overdue installments of interest at the same rate as the rate of interest or Yield to Maturity (in the case of Original Issue Discount Securities) specified in such Securities, such payments to be made ratably to the persons entitled thereto, without discrimination or preference;

THIRD: In case the principal of the Securities of such series in respect of which moneys have been collected shall have become and shall be then due and payable, to the payment of the whole amount then owing and unpaid upon all the Securities of such series for principal and interest, with interest upon the overdue principal, and (to the extent that such interest has been collected by the Trustee and is permitted by applicable law) upon the overdue installations of interest at the same rate as the rate of interest or Yield to Maturity (in the case of Original Issue Discount Securities) specified in the Securities of such series; and in case such moneys shall be insufficient to pay in full the whole amount so due and unpaid upon the Securities of such series, then to the payment of such principal and interest or Yield to Maturity, without preference or priority of principal over interest or Yield to Maturity, or of interest or Yield to Maturity over principal, or of any installment of interest over any other installment of interest or of any Security of such series over any other Security of such series, ratably to the aggregate of such principal and accrued and unpaid interest or Yield to Maturity; and

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FOURTH: To the payment of the remainder, if any, to the Issuer or any other person lawfully entitled thereto.

SECTION 5.4 SUITS FOR ENFORCEMENT. In case an Event of Default has occurred, has not been waived and is continuing, the Trustee may in its discretion proceed to protect and enforce the rights vested in it by this Indenture by such appropriate judicial proceedings as the Trustee shall deem most effectual to protect and enforce any of such rights, either at law or in equity or in bankruptcy or otherwise, whether for the specific enforcement of any covenant or agreement contained in this Indenture or in aid of the exercise of any power granted in this Indenture or to enforce any other legal or equitable right vested in the Trustee by this Indenture or by law.

SECTION 5.5 RESTORATION OF RIGHTS ON ABANDONMENT OF PROCEEDINGS. In case the Trustee shall have proceeded to enforce any right under this Indenture and such proceedings shall have been discontinued or abandoned for any reason, or shall have been determined adversely to the Trustee, then and in every such case the Issuer and the Trustee shall be restored respectively to their former positions and rights hereunder, and all rights, remedies and powers of the Issuer, the Trustee and the Securityholders shall continue as though no such proceedings had been taken.

SECTION 5.6 LIMITATIONS ON SUITS BY SECURITY HOLDERS. No Holder of any Security of any series or of any Coupon appertaining thereto shall have any right by virtue or by availing of any provision of this Indenture to institute any action or proceeding at law or in equity or in bankruptcy or otherwise upon or under or with respect to this Indenture or such Security, or for the appointment of a trustee, receiver, liquidator, custodian or other similar official or for any other remedy hereunder or thereunder, unless (a) such Holder previously shall have given to the Trustee written notice of an Event of Default with respect to Securities of such series and of the continuance thereof, as hereinbefore provided, and (b) the Holders of not less than 25% in aggregate principal amount of the Securities of such affected series then Outstanding (treated as a single class) shall have made written request upon the Trustee to institute such action or proceedings in its own name as Trustee hereunder and shall have offered to the Trustee such reasonable indemnity as it may require against the costs, expenses and liabilities to be incurred therein or thereby, and (c) the Trustee for 60 days after its receipt of such notice, request and offer of indemnity shall have failed to institute any such action or proceeding, and (d) no direction inconsistent with such written request shall have been given to the Trustee pursuant to Section 5.9; it being understood and intended, and being expressly covenanted by the taker and Holder of every Security or Coupon with every other taker and Holder and the Trustee, that no one or more Holders of Securities of any series or Coupons appertaining to such Securities shall have any right in any manner whatever by virtue or by availing of any provision of this Indenture or any Security to affect, disturb or prejudice the rights of any other such taker or Holder of Securities or Coupons appertaining to such Securities, or to obtain or seek to obtain priority over or preference to any other such taker or Holder or to enforce any right under this Indenture or any Security, except in the manner herein provided and for the equal, ratable and common benefit of all Holders of Securities of the appli-

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cable series and Coupons appertaining to such Securities. For the protection and enforcement of the provisions of this Section, each and every Securityholder and the Trustee shall be entitled to such relief as can be given either at law or in equity.

SECTION 5.7 UNCONDITIONAL RIGHT OF SECURITYHOLDERS TO INSTITUTE CERTAIN SUITS. Notwithstanding any other provision in this Indenture and any provision of any Security, the right of any Holder of any Security or Coupon to receive payment of the principal of and interest on such Security or Coupon on or after the respective due dates expressed in such Security or Coupon or the applicable redemption dates provided for in such Security, or to institute suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such Holder.

SECTION 5.8 POWERS AND REMEDIES CUMULATIVE; DELAY OR OMISSION NOT WAIVER OF DEFAULT. Except as provided in Section 5.6, no right or remedy herein conferred upon or reserved to the Trustee or to the Holders of Securities or Coupons is intended to be exclusive of any other right or remedy and every right and remedy shall, to the extent permitted by law, be cumulative and in addition to every other right and remedy given hereunder or now or hereafter existing at law or in equity or otherwise. The assertion or employment of any right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment of any other appropriate right or remedy.

No delay or omission of the Trustee or of any Holder of Securities or Coupons to exercise any right or power accruing upon any Event of Default occurring and continuing as aforesaid shall impair any such right or power or shall be construed to be a waiver of any such Event of Default or an acquiescence therein. Every power and remedy given by this Indenture, any Security or law to the Trustee or to the Holders of Securities or Coupons may be exercised from time to time, and as often as shall be deemed expedient, by the Trustee or, subject to Section 5.6, by the Holders of Securities or Coupons.

SECTION 5.9 CONTROL BY HOLDERS OF SECURITIES. The Holders of a majority in aggregate principal amount of the Securities of each series affected (with each such series voting as a separate class) at the time Outstanding shall have the right to direct the time, method, and place of conducting any proceeding for any remedy available to the Trustee, or exercising any trust or power conferred on the Trustee with respect to the Securities of such series by this Indenture; provided, that such direction shall not be otherwise than in accordance with law and the provisions of this Indenture and provided, further, that (subject to the provisions of Section 6.1) the Trustee shall have the right to decline to follow any such direction if (a) the Trustee, being advised by counsel, shall determine that the action or proceeding so directed may not lawfully be taken; or (b) if the Trustee by its board of directors, the executive committee, or a trust committee of directors or Responsible Officers of the Trustee shall determine in good faith that the action or proceedings so directed would involve the Trustee in personal liability; or (c) if the Trustee in good faith shall so determine that the actions or forbearances specified in or pursuant to such direction would be unduly prejudicial to the interests of Holders of the Securities of all affected series not joining in the giving of said

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direction, it being understood that (subject to Section 6.1) the Trustee shall have no duty to ascertain whether or not such actions or forbearances are unduly prejudicial to such Holders.

Nothing in this Indenture shall impair the right of the Trustee in its discretion to take any action deemed proper by the Trustee and which is not inconsistent with such direction or directions by Securityholders.

SECTION 5.10 WAIVER OF PAST DEFAULTS. Prior to the declaration of acceleration of the maturity of any Securities as provided in Section 5.1, the Holders of a majority in aggregate principal amount of the Securities of such series (each series voting as a separate class) at the time Outstanding with respect to which an Event of Default shall have occurred and be continuing (voting as a single class) may on behalf of the Holders of all such Securities waive any past default or Event of Default described in Section 5.1 and its consequences, except a default in respect of a covenant or provision hereof which cannot be modified or amended without the consent of the Holder of each Security affected. In the case of any such waiver, the Issuer, the Trustee and the Holders of all such Securities shall be restored to their former positions and rights hereunder, respectively, and such default shall cease to exist and be deemed to have been cured and not to have occurred for purposes of this Indenture; but no such waiver shall extend to any subsequent or other default or impair any right consequent thereon.

SECTION 5.11 TRUSTEE TO GIVE NOTICE OF DEFAULT, BUT MAY WITHHOLD IN CERTAIN CIRCUMSTANCES. The Trustee shall, within ninety days after the occurrence of a default with respect to the Securities of any series, give notice of all defaults with respect to that series known to the Trustee (i) if any Unregistered Securities of that series are then Outstanding, to the Holders thereof, by publication at least once in an Authorized Newspaper in the Borough of Manhattan, The City of New York and at least once in an Authorized Newspaper in London (and, if required by Section 3.9, at least once in an Authorized Newspaper in Luxembourg) and (ii) to all Holders of Securities of such series in the manner and to the extent provided in Section 313(c) of the Trust Indenture Act, unless in each case such defaults shall have been cured before the mailing or publication of such notice (the term "default" for the purpose of this
Section being hereby defined to mean any event or condition which is, or with notice or lapse of time or both would become, an Event of Default); provided, that, except in the case of default in the payment of the principal of or interest on any of the Securities of such series, or in the payment of any sinking fund installment on such series, the Trustee shall be protected in withholding such notice if and so long as the board of directors, the executive committee, or a trust committee of directors or trustees and/or Responsible Officers of the Trustee in good faith determines that the withholding of such notice is in the interests of the Securityholders of such series.

SECTION 5.12 RIGHT OF COURT TO REQUIRE FILING OF UNDERTAKING TO PAY COSTS. All parties to this Indenture agree, and each Holder of any Security or Coupon by his acceptance thereof shall be deemed to have agreed, that any court may in its discretion require, in any suit for the enforcement of any right or remedy under this Indenture or in any suit against the Trustee for any action taken, suffered or omitted by it as

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Trustee, the filing by any party litigant in such suit of an undertaking to pay the costs of such suit, and that such court may in its discretion assess reasonable costs, including reasonable attorneys' fees, against any party litigant in such suit, having due regard to the merits and good faith of the claims or defenses made by such party litigant; but the provisions of this
Section shall not apply to any suit instituted by the Trustee, to any suit instituted by any Securityholder or group of Securityholders of any series holding in the aggregate more than 10% in aggregate principal amount of the Securities of such series, or, in the case of any suit relating to or arising under clause (d) or (g) of Section 5.1 (if the suit relates to Securities of more than one but less than all series), 10% in aggregate principal amount of Securities then Outstanding and affected thereby, or in the case of any suit relating to or arising under clause (d) or (g) (if the suit under clause (d) or
(g) relates to all the Securities then Outstanding), (e) or (f) of Section 5.1, 10% in aggregate principal amount of all Securities then Outstanding, or to any suit instituted by any Securityholder for the enforcement of the payment of the principal of or interest on any Security on or after the due date expressed in such Security or any date fixed for redemption.

ARTICLE VI

CONCERNING THE TRUSTEE

SECTION 6.1 DUTIES AND RESPONSIBILITIES OF THE TRUSTEE; DURING DEFAULT; PRIOR TO DEFAULT. Prior to the occurrence of an Event of Default with respect to the Securities of a particular series and after the curing or waiving of all Events of Default which may have occurred with respect to such series, the Trustee undertakes to perform such duties and only such duties as are specifically set forth in this Indenture with respect to such series of Securities. In case an Event of Default with respect to the Securities of a series has occurred and has not been cured or waived, the Trustee shall exercise with respect to such series of Securities such of the rights and powers vested in it by this Indenture with respect to such series of Securities, and use the same degree of care and skill in their exercise, as a prudent man would exercise or use under the circumstances in the conduct of his own affairs.

No provision of this Indenture shall be construed to relieve the Trustee from liability for its own negligent action, its own negligent failure to act or its own willful misconduct, except that

(a) prior to the occurrence of an Event of Default with respect to the Securities of any series and after the curing or waiving of all such Events of Default with respect to such series which may have occurred:

(i) the duties and obligations of the Trustee with respect to the Securities of any series shall be determined solely by the express provisions of this Indenture, and the Trustee shall not be liable except for the performance of such duties and obligations as are specifically set forth in this Indenture, and no

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implied covenants or obligations shall be read into this Indenture against the Trustee; and

(ii) in the absence of bad faith on the part of the Trustee, the Trustee may conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon any statements, certificates or opinions furnished to the Trustee and conforming to the requirements of this Indenture; but in the case of any such statements, certificates or opinions which by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall be under a duty to examine the same to determine whether or not they conform to the requirements of this Indenture;

(b) the Trustee shall not be liable for any error of judgment made in good faith by a Responsible Officer or Responsible Officers of the Trustee, unless it shall be proved that the Trustee was negligent in ascertaining the pertinent facts; and

(c) the Trustee shall not be liable with respect to any action taken or omitted to be taken by it in good faith in accordance with the direction of the Holders pursuant to Section 5.9 relating to the time, method and place of conducting any proceeding for any remedy available to the Trustee, or exercising any trust or power conferred upon the Trustee, under this Indenture.

None of the provisions contained in this Indenture shall require the Trustee to expend or risk its own funds or otherwise incur personal financial liability in the performance of any of its duties or in the exercise of any of its rights or powers, if there shall be reasonable ground for believing that the repayment of such funds or adequate indemnity against such liability is not reasonably assured to it.

The provisions of this Section 6.1 are in furtherance of and subject to Section 315 of the Trust Indenture Act.

SECTION 6.2 CERTAIN RIGHTS OF THE TRUSTEE. In furtherance of and subject to the Trust Indenture Act, and subject to Section 6.1:

(a) the Trustee may rely and shall be protected in acting or refraining from acting upon any resolution, Officer's Certificate or any other certificate, statement, instrument, opinion, report, notice, request, consent, order, bond, debenture, note, coupon, security or other paper or document believed by it to be genuine and to have been signed or presented by the proper party or parties;

(b) any request, direction, order or demand of the Issuer mentioned herein shall be sufficiently evidenced by an Officer's Certificate (unless other evidence in respect thereof is specifically prescribed herein or in the terms established in respect of any

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series); and any resolution of the Board of Directors may be evidenced to the Trustee by a copy thereof certified by the secretary or an assistant secretary of the Issuer;

(c) the Trustee may consult with counsel and any written advice or any Opinion of Counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted to be taken by it hereunder in good faith and in reliance thereon in accordance with such advice or Opinion of Counsel;

(d) the Trustee shall be under no obligation to exercise any of the trusts or powers vested in it by this Indenture at the request, order or direction of any of the Securityholders pursuant to the provisions of this Indenture, unless such Securityholders shall have offered to the Trustee reasonable security or indemnity against the costs, expenses and liabilities which might be incurred therein or thereby;

(e) the Trustee shall not be liable for any action taken or omitted by it in good faith and believed by it to be authorized or within the discretion, rights or powers conferred upon it by this Indenture;

(f) prior to the occurrence of an Event of Default hereunder and after the curing or waiving of all Events of Default, the Trustee shall not be bound to make any investigation into the facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, consent, order, approval, appraisal, bond, debenture, note, coupon, security, or other paper or document unless requested in writing so to do by the Holders of not less than a majority in aggregate principal amount of the Securities of all series affected then Outstanding; provided, that, if the payment within a reasonable time to the Trustee of the costs, expenses or liabilities likely to be incurred by it in the making of such investigation is, in the opinion of the Trustee, not reasonably assured to the Trustee by the security afforded to it by the terms of this Indenture, the Trustee may require reasonable indemnity against such expenses or liabilities as a condition to proceeding; the reasonable expenses of every such investigation shall be paid by the Issuer or, if paid by the Trustee or any predecessor trustee, shall be repaid by the Issuer upon demand; and

(g) the Trustee may execute any of the trusts or powers hereunder or perform any duties hereunder either directly or by or through agents or attorneys not regularly in its employ and the Trustee shall not be responsible for any misconduct or negligence on the part of any such agent or attorney appointed with due care by it hereunder.

SECTION 6.3 TRUSTEE NOT RESPONSIBLE FOR RECITALS, DISPOSITION OF SECURITIES OR APPLICATION OF PROCEEDS THEREOF. The recitals contained herein and in the Securities, except the Trustee's certificates of authentication, shall be taken as the statements of the Issuer, and the Trustee assumes no responsibility for the correctness of the same. The Trustee makes no representation as to the validity or sufficiency

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of this Indenture or of the Securities or Coupons. The Trustee shall not be accountable for the use or application by the Issuer of any of the Securities or of the proceeds thereof.

SECTION 6.4 TRUSTEE AND AGENTS MAY HOLD SECURITIES OR COUPONS; COLLECTIONS, ETC. The Trustee or any agent of the Issuer or of the Trustee, in its individual or any other capacity, may become the owner or pledgee of Securities or Coupons with the same rights it would have if it were not the Trustee or such agent and may otherwise deal with the Issuer and receive, collect, hold and retain collections from the Issuer with the same rights it would have if it were not the Trustee or such agent.

SECTION 6.5 MONEYS HELD BY TRUSTEE. Subject to the provisions of Section 10.4 hereof, all moneys received by the Trustee shall, until used or applied as herein provided, be held in trust for the purposes for which they were received, but need not be segregated from other funds except to the extent required by mandatory provisions of law. Neither the Trustee nor any agent of the Issuer or the Trustee shall be under any liability for interest on any moneys received by it hereunder.

SECTION 6.6 COMPENSATION AND INDEMNIFICATION OF TRUSTEE AND ITS PRIOR CLAIM. The Issuer covenants and agrees to pay to the Trustee from time to time, and the Trustee shall be entitled to reasonable compensation (which shall not be limited by any provision of law in regard to the compensation of a trustee of an express trust) and the Issuer covenants and agrees to pay or reimburse the Trustee and each predecessor trustee upon its request for all reasonable expense, disbursements and advances incurred or made by or on behalf of it in accordance with any of the provisions of this Indenture (including the reasonable compensation and the expenses and disbursements of its counsel and of all agents and other persons not regularly in its employ) except any such expense, disbursement or advance as may arise from its negligence or bad faith. The Issuer also covenants to indemnify the Trustee and each predecessor trustee for, and to hold it harmless against, any loss, liability or expense incurred without negligence or bad faith on its part, arising out of or in connection with the acceptance or administration of this Indenture or the trusts hereunder and its duties hereunder, including the costs and expenses of defending itself against or investigating any claim of liability in the premises. The obligations of the Issuer under this Section to compensate and indemnify the Trustee and each predecessor trustee and to pay or reimburse the Trustee and each predecessor trustee for expenses, disbursements and advances shall constitute additional indebtedness hereunder and shall survive the satisfaction and discharge of this Indenture. Such additional indebtedness shall be a senior claim to that of the Securities upon all property and funds held or collected by the Trustee as such, except funds held in trust for the benefit of the Holders of particular Securities or Coupons, and the Securities are hereby subordinated to such senior claim.

SECTION 6.7 RIGHT OF TRUSTEE TO RELY ON OFFICER'S CERTIFICATE, ETC. Subject to Sections 6.1 and 6.2, whenever in the administration of the trusts of this Indenture the Trustee shall deem it necessary or desirable that a matter be proved or established prior to taking or suffering or omitting any action hereunder, such matter (unless

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other evidence in respect thereof be herein specifically prescribed) may, in the absence of negligence or bad faith on the part of the Trustee, be deemed to be conclusively proved and established by an Officer's Certificate delivered to the Trustee, and such certificate, in the absence of negligence or bad faith on the part of the Trustee, shall be full warrant to the Trustee for any action taken, suffered or omitted by it under the provisions of this Indenture upon the faith thereof.

SECTION 6.8 INDENTURES NOT CREATING POTENTIAL CON- FLICTING INTERESTS FOR THE TRUSTEE. The following indentures are hereby specifically described for the purposes of Section 310(b)(1) of the Trust Indenture Act: this Indenture with respect to the Securities of any other series.

SECTION 6.9 QUALIFICATION OF TRUSTEE: CONFLICTING INTERESTS. The Trustee shall comply with Section 310(b) of the Trust Indenture Act.

SECTION 6.10 PERSONS ELIGIBLE FOR APPOINTMENT AS TRUST- EE. The Trustee for each series of Securities hereunder shall at all times be a corporation or banking association organized and doing business under the laws of the United States of America, any State thereof or the District of Columbia, having a combined capital and surplus of at least $50,000,000, and which is authorized under such laws to exercise corporate trust powers and is subject to supervision or examination by Federal, state or District of Columbia authority. If such corporation publishes reports of condition at least annually, pursuant to law or to the requirements of the aforesaid supervising or examining authority, then for the purposes of this Section, the combined capital and surplus of such corporation shall be deemed to be its combined capital and surplus as set forth in its most recent report of condition so published. In case at any time the Trustee shall cease to be eligible in accordance with the provisions of this Section, the Trustee shall resign immediately in the manner and with the effect specified in Section 6.11.

The provisions of this Section 6.10 are in furtherance of and subject to Section 310(a) of the Trust Indenture Act.

SECTION 6.11 RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR TRUSTEE. (a) The Trustee, or any trustee or trustees hereafter appointed, may at any time resign with respect to one or more or all series of Securities by giving written notice of resignation to the Issuer and (i) if any Unregistered Securities of a series affected are then Outstanding, by giving notice of such resignation to the Holders thereof, by publication at least once in an Authorized Newspaper in the Borough of Manhattan, The City of New York, and at least once in an Authorized Newspaper in London (and, if required by Section 3.9, at least once in an Authorized Newspaper in Luxembourg), (ii) if any Unregistered Securities of a series affected are then Outstanding, by mailing notice of such resignation to the Holders thereof who have filed their names and addresses with the Trustee pursuant to Section 313(c)(2) of the Trust Indenture Act at such addresses as were so furnished to the Trustee and (iii) by mailing notice of such resignation to the Holders of then Outstanding Registered Securities of each series

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affected at their addresses as they shall appear on the registry books. Upon receiving such notice of resignation, the Issuer shall promptly appoint a successor trustee or trustees with respect to the applicable series by written instrument in duplicate, executed by authority of the Board of Directors, one copy of which instrument shall be delivered to the resigning Trustee and one copy to the successor trustee or trustees. If no successor trustee shall have been so appointed with respect to any series and have accepted appointment within 30 days after the mailing of such notice of resignation, the resigning trustee may petition any court of competent jurisdiction for the appointment of a successor trustee, or any Securityholder who has been a bona fide Holder of a Security or Securities of the applicable series for at least six months may, subject to the provisions of Section 5.12, on behalf of himself and all others similarly situated, petition any such court for the appointment of a successor trustee. Such court may thereupon, after such notice, if any, as it may deem proper and prescribe, appoint a successor trustee.

(b) In case at any time any of the following shall occur:

(i) the Trustee shall fail to comply with the provisions of Section 310(b) of the Trust Indenture Act with respect to any series of Securities after written request therefor by the Issuer or by any Securityholder who has been a bona fide Holder of a Security or Securities of such series for at least six months; or

(ii) the Trustee shall cease to be eligible in accordance with the provisions of Section 6.10 and Section 310(a) of the Trust Indenture Act and shall fail to resign after written request therefor by the Issuer or by any Securityholder; or

(iii) the Trustee shall become incapable of acting with respect to any series of Securities, or shall be adjudged a bankrupt or insolvent, or a receiver or liquidator of the Trustee or of its property shall be appointed, or any public officer shall take charge or control of the Trustee or of its property or affairs for the purpose of rehabilitation, conservation or liquidation;

then, in any such case, the Issuer may remove the Trustee with respect to the applicable series of Securities and appoint a successor trustee for such series by written instrument, in duplicate, executed by order of the Board of Directors of the Issuer, one copy of which instrument shall be delivered to the Trustee so removed and one copy to the successor trustee, or, subject to the provisions of
Section 315(e) of the Trust Indenture Act, any Securityholder who has been a bona fide Holder of a Security or Securities of such series for at least six months may on behalf of himself and all others similarly situated, petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor trustee with respect to such series. Such court may thereupon, after such notice, if any, as it may deem proper and prescribe, remove the Trustee and appoint a successor trustee.

(c) The Holders of a majority in aggregate principal amount of the Securities of each series at the time outstanding may at any time remove the Trustee with respect to Securities of such series and appoint a successor trustee with respect to the Securities of

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such series by delivering to the Trustee so removed, to the successor trustee so appointed and to the Issuer the evidence provided for in
Section 7.1 of the action in that regard taken by the Securityholders.

(d) Any resignation or removal of the Trustee with respect to any series and any appointment of a successor trustee with respect to such series pursuant to any of the provisions of this Section 6.11 shall become effective upon acceptance of appointment by the successor trustee as provided in Section 6.12.

. SECTION 6.12 ACCEPTANCE OF APPOINTMENT BY SUCCESSOR TRUSTEE. Any successor trustee appointed as provided in Section 6.11 shall execute and deliver to the Issuer and to its predecessor trustee an instrument accepting such appointment hereunder, and thereupon the resignation or removal of the predecessor trustee with respect to all or any applicable series shall become effective and such successor trustee, without any further act, deed or conveyance, shall become vested with all rights, powers, duties and obligations with respect to such series of its predecessor hereunder, with like effect as if originally named as trustee for such series hereunder; but, nevertheless, on the written request of the Issuer or of the successor trustee, upon payment of its charges then unpaid, the trustee ceasing to act shall, subject to Section 10.4, pay over to the successor trustee all moneys at the time held by it hereunder and shall execute and deliver an instrument transferring to such successor trustee all such rights, powers, duties and obligations. Upon request of any such successor trustee, the Issuer shall execute any and all instruments in writing for more fully and certainly vesting in and confirming to such successor trustee all such rights and powers. Any trustee ceasing to act shall, nevertheless, retain a prior claim upon all property or funds held or collected by such trustee to secure any amounts then due it pursuant to the provisions of
Section 6.6.

If a successor trustee is appointed with respect to the Securities of one or more (but not all) series, the Issuer, the predecessor trustee and each successor trustee with respect to the Securities of any applicable series shall execute and deliver an indenture supplemental hereto which shall contain such provisions as shall be deemed necessary or desirable to confirm that all the rights, powers, trusts and duties of the predecessor trustee with respect to the Securities of any series as to which the predecessor trustee is not retiring shall continue to be vested in the predecessor trustee, and shall add to or change any of the provisions of this Indenture as shall be necessary to provide for or facilitate the administration of the trusts hereunder by more than one trustee, it being understood that nothing herein or in such supplemental indenture shall constitute such trustees co-trustees of the same trust and that each such trustee shall be trustee of a trust or trusts under separate indentures.

No successor trustee with respect to any series of Securities shall accept appointment as provided in this Section 6.12 unless at the time of such acceptance such successor trustee shall be qualified under Section 310(b) of the Trust Indenture Act and eligible under the provisions of Section 6.10.

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Upon acceptance of appointment by any successor trustee as provided in this Section 6.12, the Issuer shall give notice thereof (a) if any Unregistered Securities of a series affected are then Outstanding, to the Holders thereof, by publication of such notice at least once in an Authorized Newspaper in the Borough of Manhattan, The City of New York and at least once in an Authorized Newspaper in London (and, if required by Section 3.9, at least once in an Authorized Newspaper in Luxembourg), (b) if any Unregistered Securities of a series affected are then Outstanding, to the Holders thereof who have filed their names and addresses with the Trustee pursuant to Section 313(c)(2) of the Trust Indenture Act, by mailing such notice to such Holders at such addresses as were so furnished to the Trustee (and the Trustee shall make such information available to the Issuer for such purpose) and (c) to the Holders of Registered Securities of each series affected, by mailing such notice to such Holders at their addresses as they shall appear on the registry books. If the acceptance of appointment is substantially contemporaneous with the resignation, then the notice called for by the preceding sentence may be combined with the notice called for by Section 6.11. If the Issuer fails to give such notice within ten days after acceptance of appointment by the successor trustee, the successor trustee shall cause such notice to be given at the expense of the Issuer.

SECTION 6.13 MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO BUSINESS OF TRUSTEE. Any corporation into which the Trustee may be merged or converted or with which it may be consolidated, or any corporation resulting from any merger, conversion or consolidation to which the Trustee shall be a party, or any corporation succeeding to the corporate trust business of the Trustee, shall be the successor of the Trustee hereunder, provided, that such corporation shall be qualified under Section 310(b) of the Trust Indenture Act and eligible under the provisions of Section 6.10, without the execution or filing of any paper or any further act on the part of any of the parties hereto, anything herein to the contrary notwithstanding.

In case at the time such successor to the Trustee shall succeed to the trusts created by this Indenture any of the Securities of any series shall have been authenticated but not delivered, any such successor to the Trustee may adopt the certificate of authentication of any predecessor trustee and deliver such Securities so authenticated; and, in case at that time any of the Securities of any series shall not have been authenticated, any successor to the Trustee may authenticate such Securities either in the name of any predecessor hereunder or in the name of the successor Trustee; and in all such cases such certificate shall have the full force which it is anywhere in the Securities of such series or in this Indenture provided that the certificate of the Trustee shall have; provided, that the right to adopt the certificate of authentication of any predecessor trustee or to authenticate Securities of any series in the name of any predecessor trustee shall apply only to its successor or successors by merger, conversion or consolidation.

SECTION 6.14 PREFERENTIAL COLLECTION OF CLAIMS AGAINST THE ISSUER. The Trustee shall comply with Section 311(a) of the Trust Indenture Act, excluding any creditor relationship listed in Section 311(b) of the Trust Indenture Act. A Trustee who has resigned or been removed shall be subject to
Section 311(a) of the Trust Indenture Act to the extent indicated.

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SECTION 6.15 APPOINTMENT OF AUTHENTICATING AGENT. As long as any Securities of a series remain Outstanding, the Trustee may, by an instrument in writing, appoint with the approval of the Issuer an authenticating agent (the "Authenticating Agent") which shall be authorized to act on behalf of the Trustee to authenticate Securities, including Securities issued upon exchange, registration of transfer, partial redemption or pursuant to Section 2.9. Securities of each such series authenticated by such Authenticating Agent shall be entitled to the benefits of this Indenture and shall be valid and obligatory for all purposes as if authenticated by the Trustee. Whenever reference is made in this Indenture to the authentication and delivery of Securities of any series by the Trustee or to the Trustee's Certificate of Authentication, such reference shall be deemed to include authentication and delivery on behalf of the Trustee by an Authenticating Agent for such series and a Certificate of Authentication executed on behalf of the Trustee by such Authenticating Agent. Such Authenticating Agent shall at all times be a corporation organized and doing business under the laws of the United States of America or of any State, authorized under such laws to exercise corporate trust powers, having a combined capital and surplus of at least $45,000,000 (determined as provided in Section 6.10 with respect to the Trustee) and subject to supervision or examination by Federal or State authority.

Any corporation into which any Authenticating Agent may be merged or converted, or with which it may be consolidated, or any corporation resulting from any merger, conversion or consolidation to which any Authenticating Agent shall be a party, or any corporation succeeding to the corporate agency business of any Authenticating Agent, shall continue to be the authenticating Agent with respect to all series of Securities for which it served as Authenticating Agent without the execution or filing of any paper or any further act on the part of the Trustee or such Authenticating Agent. Any Authenticating Agent may at any time, and if it shall cease to be eligible shall, resign by giving written notice of resignation to the Trustee and to the Issuer.

Upon receiving such a notice of resignation or upon such a termination, or in case at any time any Authenticating Agent shall cease to be eligible in accordance with the provisions of this Section 6.15 with respect to one or more series of Securities, the Trustee shall upon receipt of an Issuer Order appoint a successor Authenticating Agent and the Issuer shall provide notice of such appointment to all Holders of Securities of such series in the manner and to the extent provided in Section 11.4. Any successor Authenticating Agent upon acceptance of its appointment hereunder shall become vested with all rights, powers, duties and responsibilities of its predecessor hereunder, with like effect as if originally named as Authenticating Agent. The Issuer agrees to pay to the Authenticating Agent for such series from time to time reasonable compensation. The Authenticating Agent for the Securities of any series shall have no responsibility or liability for any action taken by it as such at the direction of the Trustee.

Sections 6.2, 6.3, 6.4, 6.6 and 7.3 shall be applicable to any Authenticating Agent.

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ARTICLE VII

CONCERNING THE SECURITYHOLDERS

SECTION 7.1 EVIDENCE OF ACTION TAKEN BY SECURITYHOLDERS. Any request, demand, authorization, direction, notice, consent, waiver or other action provided by this Indenture to be given or taken by a specified percentage in principal amount of the Securityholders of any or all series may be embodied in and evidenced by one or more instruments of substantially similar tenor signed by such specified percentage of Securityholders in person or by agent duly appointed in writing; and, except as herein otherwise expressly provided, such action shall become effective when such instrument or instruments are delivered to the Trustee. Proof of execution of any instrument or of a writing appointing any such agent shall be sufficient for any purpose of this Indenture and (subject to Sections 6.1 and 6.2) conclusive in favor of the Trustee and the Issuer, if made in the manner provided in this Article.

SECTION 7.2 PROOF OF EXECUTION OF INSTRUMENTS AND OF HOLDING OF SECURITIES. Subject to Sections 6.1 and 6.2, the execution of any instrument by a Securityholder or his agent or proxy may be proved in accordance with such reasonable rules and regulations as may be prescribed by the Trustee or in such manner as shall be satisfactory to the Trustee. The holding or Securities shall be proved by the Security register or by a certificate of the registrar thereof.

SECTION 7.3 HOLDERS TO BE TREATED AS OWNERS. The Issuer, the Trustee and any agent of the Issuer or the Trustee may deem and treat the person in whose name any Security shall be registered upon the Security register for such series as the absolute owner of such Security (whether or not such Security shall be overdue and notwithstanding any notation of ownership or other writing thereon) for the purpose of receiving payment of or on account of the principal of and, subject to the provisions of this Indenture, interest on such Security and for all other purposes; and neither the Issuer nor the Trustee nor any agent of the Issuer or the Trustee shall be affected by any notice to the contrary. The Issuer, the Trustee and any agent of the Issuer or the Trustee may treat the Holder of any Unregistered Security and the Holder of any Coupon as the absolute owner of such Unregistered Security or Coupon (whether or not such Unregistered Security or Coupon shall be overdue) for the purpose of receiving payment thereof or on account thereof and for all other purposes and neither the Issuer, the Trustee, nor any agent of the Issuer or the Trustee shall be affected by any notice to the contrary. All such payments so made to any such person, or upon his order, shall be valid, and, to the extent of the sum or sums so paid, effectual to satisfy and discharge the liability for moneys payable upon any such Unregistered Security or Coupon.

SECTION 7.4 SECURITIES OWNED BY ISSUER DEEMED NOT OUTSTANDING. In determining whether the Holders of the requisite aggregate principal amount of Outstanding Securities of any or all series have concurred in any request, demand, authorization, direction, notice, consent, waiver or other action by Securityholders under this

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Indenture, Securities which are owned by the Issuer or any other obligor on the Securities with respect to which such determination is being made or by any person directly or indirectly controlling or controlled by or under direct or indirect common control with the Issuer or any other obligor on the Securities with respect to which such determination is being made shall be disregarded and deemed not to be Outstanding for the purpose of any such determination, except that for the purpose of determining whether the Trustee shall be protected in relying on any such action only Securities which the Trustee knows are so owned shall be so disregarded. Securities so owned which have been pledged in good faith may be regarded as Outstanding if the pledgee establishes to the satisfaction of the Trustee the pledgee's right so to act with respect to such Securities and that the pledgee is not the Issuer or any other obligor upon the Securities or any person directly or indirectly controlling or controlled by or under direct or indirect common control with the Issuer or any other obligor on the Securities. In case of a dispute as to such right, the advice of counsel shall be full protection in respect of any decision made by the Trustee in accordance with such advice. Upon request of the Trustee, the Issuer shall furnish to the Trustee promptly an Officer's Certificate listing and identifying all Securities, if any, known by the Issuer to be owned or held by or for the account of any of the above-described persons; and, subject to Sections 6.1 and 6.2, the Trustee shall be entitled to accept such Officer's Certificate as conclusive evidence of the facts therein set forth and of the fact that all Securities not listed therein are Outstanding for the purpose of any such determination.

SECTION 7.5 RIGHT OF REVOCATION OF ACTION TAKEN. At any time prior to (but not after) the evidencing to the Trustee, as provided in Section 7.1, of the taking of any action by the Holders of the percentage in aggregate principal amount of the Securities of any or all series, as the case may be, specified in this Indenture in connection with such action, any Holder of a Security the serial number of which is shown by the evidence to be included among the serial numbers of the Securities the Holders of which have consented to such action may, by filing written notice at the Corporate Trust Office and upon proof of holding as provided in this Article, revoke such action so far as concerns such Security. Except as aforesaid any such action taken by the Holder of any Security shall be conclusive and binding upon such Holder and upon all future Holders and owners of such Security and of any Securities issued in exchange or substitution therefor or on registration of transfer thereof, irrespective of whether or not any notation in regard thereto is made upon any such Security. Any action taken by the Holders of the percentage in aggregate principal amount of the Securities of any or all series, as the case may be, specified in this Indenture in connection with such action shall be conclusively binding upon the Issuer, the Trustee and the Holders of all the Securities affected by such action.

ARTICLE VIII

SUPPLEMENTAL INDENTURES

SECTION 8.1 SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF SECURITYHOLDERS. The Issuer, when authorized by a resolution of its Board of Directors (which resolution may provide general terms or parameters for such action and may provide that

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the specific terms of such action may be determined in accordance with or pursuant to an Issuer Order), and the Trustee may from time to time and at any time enter into an indenture or indentures supplemental hereto for one or more of the following purposes:

(a) to convey, transfer, assign, mortgage or pledge to the Trustee as security for the Securities of one or more series any property or assets;

(b) to evidence the succession of another corporation to the Issuer, or successive successions, and the assumption by the successor corporation of the covenants, agreements and obligations of the Issuer pursuant to Article IX;

(c) to add to the covenants of the Issuer such further covenants, restrictions, conditions or provisions as the Issuer and the Trustee shall consider to be for the protection of the Holders of Securities or Coupons, and to make the occurrence, or the occurrence and continuance, of a default in any such additional covenants, restrictions, conditions or provisions an Event of Default permitting the enforcement of all or any of the several remedies provided in this Indenture as herein set forth; provided, that in respect of any such additional covenant, restriction, condition or provision such supplemental indenture may provide for a particular period of grace after default (which period may be shorter or longer than that allowed in the case of other defaults) or may provide for an immediate enforcement upon such an Event of Default or may limit the remedies available to the Trustee upon such an Event of Default or may limit the right of the Holders of a majority in aggregate principal amount of the Securities of such series to waive such an Event of Default;

(d) to cure any ambiguity or to correct or supplement any provision contained herein or in any supplemental indenture which may be defective or inconsistent with any other provision contained herein or in any supplemental indenture, or to make any other provisions as the Issuer may deem necessary or desirable, provided, that no such action shall adversely affect the interests of the Holders of the Securities or Coupons;

(e) to establish the forms or terms of Securities of any series or of the Coupons appertaining to such Securities as permitted by Sections 2.1 and 2.3; and

(f) to evidence and provide for the acceptance of appointment hereunder by a successor trustee with respect to the Securities of one or more series and to add to or change any of the provisions of this Indenture as shall be necessary to provide for or facilitate the administration of the trusts hereunder by more than one trustee, pursuant to the requirements of Section 6.12.

The Trustee is hereby authorized to join with the Issuer in the execution of any such supplemental indenture, to make any further appropriate agreements and stipulations which may be therein contained and to accept the conveyance, transfer, assignment, mortgage or pledge of any property thereunder, but the Trustee shall not be obligated to enter into any such

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supplemental indenture which affects the Trustee's own rights, duties or immunities under this Indenture or otherwise.

Any supplemental indenture authorized by the provisions of this Section may be executed without the consent of the Holders of any of the Securities at the time outstanding, notwithstanding any of the provisions of
Section 8.2.

SECTION 8.2 SUPPLEMENTAL INDENTURES WITH CONSENT OF SECURITYHOLDERS. With the consent (evidenced as provided in Article VII) of the Holders of not less than a majority in aggregate principal amount of the Securities at the time Outstanding of all series affected by such supplemental indenture (voting as one class), the Issuer, when authorized by a resolution of its Board of Directors (which resolution may provide general terms or parameters for such action and may provide that the specific terms of such action may be determined in accordance with or pursuant to an Issuer Order), and the Trustee may, from time to time and at any time, enter into an indenture or indentures supplemental hereto (which shall conform to the provisions of the Trust Indenture Act as in force and effect at the date of execution thereof) for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of this Indenture or of any supplemental indenture or of modifying in any manner the rights of the Holders of the Securities of each such series or of the Coupons appertaining to such Securities; provided, that no such supplemental indenture shall (a) extend the final maturity of any Security, or reduce the principal amount thereof, or reduce the rate or extend the time of payment of interest thereon, or reduce any amount payable on redemption thereof, or make the principal thereof (including any amount in respect of original issue discount), or interest thereon payable in any coin or currency other than that provided in the Securities and Coupons or in accordance with the terms thereof, or reduce the amount of the principal of an Original Issue Discount Security that would be due and payable upon an acceleration of the maturity thereof pursuant to Section 5.1 or the amount thereof provable in bankruptcy pursuant to
Section 5.2, or alter the provisions of Section 11.11 or 11.12 or impair or affect the right of any Securityholder to institute suit for the payment thereof when due or, if the Securities provide therefor, any right of repayment at the option of the Securityholder, in each case without the consent of the Holder of each Security so affected, or (b) reduce the aforesaid percentage of Securities of any series, the consent of the Holders of which is required for any such supplemental indenture, without the consent of the Holders of each Security so affected.

A supplemental indenture which changes or eliminates any covenant or other provision of this Indenture which has expressly been included solely for the benefit of one or more particular series of Securities, or which modifies the rights of Holders of Securities of such series, or of Coupons appertaining to such Securities, with respect to such covenant or provision, shall be deemed not to affect the rights under this Indenture of the Holders of Securities of any other series or of the Coupons appertaining to such Securities.

Upon the request of the Issuer, accompanied by a copy of a resolution of the Board of Directors (which resolution may provide general terms or parameters for such action

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and may provide that the specific terms of such action may be determined in accordance with or pursuant to an Issuer Order) certified by the secretary or an assistant secretary of the Issuer authorizing the execution of any such supplemental indenture, and upon the filing with the Trustee of evidence of the consent of the Holders of the Securities as aforesaid and other documents, if any, required by Section 7.1, the Trustee shall join with the Issuer in the execution of such supplemental indenture unless such supplemental indenture affects the Trustee's own rights, duties or immunities under this Indenture or otherwise, in which case the Trustee may in its discretion, but shall not be obligated to, enter into such supplemental indenture.

It shall not be necessary for the consent of the Securityholders under this Section to approve the particular form of any proposed supplemental indenture, but it shall be sufficient if such consent shall approve the substance thereof.

Promptly after the execution by the Issuer and the Trustee of any supplemental indenture pursuant to the provisions of this Section, the Trustee shall give notice thereof (i) to the Holders of then Outstanding Registered Securities of each series affected thereby, by mailing a notice thereof by first-class mail to such Holders at their addresses as they shall appear on the Security register, (ii) if any Unregistered Securities of a series affected thereby are then Outstanding, to the Holders thereof who have filed their names and addresses with the Trustee pursuant to Section 313(c)(2) of the Trust Indenture Act, by mailing a notice thereof by first-class mail to such Holders at such addresses as were so furnished to the Trustee and (iii) if any Unregistered Securities of a series affected thereby are then Outstanding, to all Holders thereof, by publication of a notice thereof at least once in an Authorized Newspaper in the Borough of Manhattan, The City of New York and at least once in an Authorized Newspaper in London (and, if required by Section 3.9, at least once in an Authorized Newspaper in Luxembourg), and in each case such notice shall set forth in general terms the substance of such supplemental indenture. Any failure of the Issuer to give such notice, or any defect therein, shall not, however, in any way impair or affect the validity of any such supplemental indenture.

SECTION 8.3 EFFECT OF SUPPLEMENTAL INDENTURE. Upon the execution of any supplemental indenture pursuant to the provisions hereof, this Indenture shall be and be deemed to be modified and amended in accordance therewith and the respective rights, limitations of rights, obligations, duties and immunities under this Indenture of the Trustee, the Issuer and the Holders of Securities of each series affected thereby shall thereafter be determined, exercised and enforced hereunder subject in all respects to such modifications and amendments, and all the terms and conditions of any such supplemental indenture shall be and be deemed to be part of the terms and conditions of this Indenture for any and all purposes.

SECTION 8.4 DOCUMENTS TO BE GIVEN TO TRUSTEE. The Trustee, subject to the provisions of Sections 6.1 and 6.2, may receive an Officer's Certificate and an Opinion of Counsel as conclusive evidence that any supplemental indenture executed pursuant to this Article 8 complies with the applicable provisions of this Indenture.

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SECTION 8.5 NOTATION ON SECURITIES IN RESPECT OF SUPPLEMENTAL INDENTURES. Securities of any series authenticated and delivered after the execution of any supplemental indenture pursuant to the provisions of this Article may bear a notation in form approved by the Trustee for such series as to any matter provided for by such supplemental indenture or as to any action taken by Securityholders. If the Issuer or the Trustee shall so determine, new Securities of any series so modified as to conform, in the opinion of the Trustee and the Board of Directors, to any modification of this Indenture contained in any such supplemental indenture may be prepared by the Issuer, authenticated by the Trustee and delivered in exchange for the Securities of such series then Outstanding.

ARTICLE IX

CONSOLIDATION, MERGER, SALE OR CONVEYANCE

SECTION 9.1 ISSUER MAY CONSOLIDATE, ETC., ONLY ON CERTAIN TERMS. The Issuer shall not consolidate with or merge into any other Person or transfer or lease its properties and assets substantially as an entirety to any Person, and the Issuer shall not permit any other Person to consolidate with or merge into the Issuer, unless:

(a) either the Issuer shall be the continuing corporation, or the successor corporation (if other than the Issuer) formed by such consolidation or into which the Issuer is merged or to which the properties and assets of the Issuer substantially as an entity are transferred or leased shall be a corporation organized and existing under the laws of the United States of America, any State thereof or the District of Columbia and shall expressly assume, by an indenture supplemental hereto, executed and delivered to the Trustee, in form satisfactory to the Trustee, all the obligations of the Issuer under the Securities and this Indenture; and

(b) immediately after giving effect to such transaction and treating any indebtedness which becomes an obligation of the Issuer or a Subsidiary as a result of such transaction as having been incurred by the Issuer or such Subsidiary at the time of such transaction, no Event of Default, and no event which, after notice or lapse of time or both, would become an Event of Default, shall have happened and be continuing.

SECTION 9.2 SUCCESSOR CORPORATION SUBSTITUTED. The successor corporation formed by such consolidation or into which the Issuer is merged or to which such transfer or lease is made shall succeed to and be substituted for, and may exercise every right and power of, the Issuer under this Indenture with the same effect as if such successor corporation had been named as the Issuer herein, and thereafter (except in the case of a lease to another Person) the predecessor corporation shall be relieved of all obligations and covenants under the Indenture and the Securities and, in the event of such conveyance or transfer, any such predecessor corporation may be dissolved and liquidated.

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SECTION 9.3 OPINION OF COUNSEL TO BE GIVEN TRUSTEE. The Trustee, subject to the provisions of Sections 6.1 and 6.2, may receive an Opinion of Counsel as conclusive evidence that any such consolidation, merger, sale or conveyance, and any such assumption, complies with the provisions of this Article IX.

ARTICLE X

SATISFACTION AND DISCHARGE OF INDENTURE;
UNCLAIMED MONEYS

SECTION 10.1 SATISFACTION AND DISCHARGE OF INDENTURE.

(A) If at any time (i) the Issuer shall have paid or caused to be paid the principal of and interest on all the Securities of any series Outstanding hereunder and all un- matured Coupons appertaining thereto (other than Securities of such series and Coupons appertaining thereto which have been destroyed, lost or stolen and which have been replaced or paid as provided in
Section 2.9) as and when the same shall have become due and payable, or (ii) the Issuer shall have delivered to the Trustee for cancellation all Securities of any series theretofore authenticated and all unmatured Coupons appertaining thereto (other than any Securities of such series and Coupons appertaining thereto which shall have been destroyed, lost or stolen and which shall have been replaced or paid as provided in Section 2.9) or (iii) in the case of any series of Securities where the exact amount (including the currency of payment) of principal of and interest due on which can be determined at the time of making the deposit referred to in clause (b) below, (a) all the Securities of such series and all unmatured Coupons appertaining thereto not theretofore delivered to the Trustee for cancellation shall have become due and payable, or are by their terms to become due and payable within one year or are to be called for redemption within one year under arrangements satisfactory to the Trustee for the giving of notice of redemption, and (b) the Issuer shall have irrevocably deposited or caused to be deposited with the Trustee as trust funds in trust the entire amount in (i) cash (other than moneys repaid by the Trustee or any paying agent to the Issuer in accordance with Section 10.4), (ii) in the case of any series of Securities the payments on which may only be made in Dollars, direct obligations of the United States of America, backed by its full faith and credit ("U.S. Government Obligations"), maturing as to principal and interest at such times and in such amounts as will insure the availability of cash sufficient to pay at such maturity or upon such redemption, as the case may be, or (iii) a combination thereof, sufficient, in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee, to pay (a) the principal and interest on all Securities of such series and Coupons appertaining thereto on each date that such principal or interest is due and payable and (b) any mandatory sinking fund payments on the dates on which such payments are due and payable in accordance with the terms of the Indenture and the Securities of such series; (x) the principal and interest on all Securities of such series and Coupons appertaining thereto on each date that such principal or interest is due and payable and (y) any mandatory sinking fund payments on the dates on which such payments are due and payable in accordance with the terms of the Indenture and the Securities of such series; and if, in any such case, the Issuer shall

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also pay or cause to be paid all other sums payable hereunder by the Issuer, then this Indenture shall cease to be of further effect (except as to (i) rights of registration of transfer and exchange of Securities of such Series and of Coupons appertaining thereto and the Issuer's right of optional redemption, if any, (ii) substitution of mutilated, defaced, destroyed, lost or stolen Securities or Coupons, (iii) rights of holders of Securities and Coupons appertaining thereto to receive payments of principal thereof and interest thereon, upon the original stated due dates therefor (but not upon acceleration), and remaining rights of the Holders to receive mandatory sinking fund payments, if any, (iv) any optional redemption rights of such series of Securities to the extent to be exercised to make such call for redemption within one year, (v) the rights, obligations, duties and immunities of the Trustee hereunder, including those under Section 6.6, (vi) the rights of the Holders of securities of such series and Coupons appertaining thereto as beneficiaries hereof with respect to the property so deposited with the Trustee payable to all or any of them, and (vii) the obligations of the Issuer under Section 3.2) and the Trustee, on demand of the Issuer accompanied by an Officer's Certificate and an Opinion of Counsel and at the cost and expense of the Issuer, shall execute proper instruments acknowledging such satisfaction of and discharging this Indenture; provided, that the rights of Holders of the Securities and Coupons to receive amounts in respect of principal of and interest on the Securities and Coupons held by them shall not be delayed longer than required by then-applicable mandatory rules or policies of any securities exchange upon which the Securities are listed. The Issuer agrees to reimburse the Trustee for any costs or expenses thereafter reasonably and properly incurred and to compensate the Trustee for any services thereafter reasonably and properly rendered by the Trustee in connection with this Indenture or the Securities of such series.

(B) The following provisions shall apply to the Securities of each series unless specifically otherwise provided in a Board Resolution, Officer's Certificate or indenture supplemental hereto provided pursuant to
Section 2.3. In addition to discharge of the Indenture pursuant to the next preceding paragraph, in the case of any series of Securities the exact amounts (including the currency of payment) of principal of and interest due on which can be determined at the time of making the deposit referred to in clause (a) below, the Issuer shall be deemed to have paid and discharged the entire indebtedness on all the Securities of such a series and the Coupons appertaining thereto on the date of the deposit referred to in subparagraph (a) below, and the provisions of this Indenture with respect to the Securities of such series and Coupons appertaining thereto shall no longer be in effect (except as to (i) rights of registration of transfer and exchange of Securities of such series and of Coupons appertaining thereto and the Issuer's right of optional redemption, if any, (ii) substitution of mutilated, defaced, destroyed, lost or stolen Securities or Coupons, (iii) rights of Holders of Securities and Coupons appertaining thereto to receive payments of principal thereof and interest thereon, upon the original stated due dates therefor (but not upon acceleration), and remaining rights of the Holders to receive mandatory sinking fund payments, if any, (iv) any optional redemption rights of such series of Securities to the extent to be exercised to make such call for redemption within one year, (v) the rights, obligations, duties and immunities of the Trustee hereunder, (vi) the rights of the Holders of Securities of such series and Coupons appertaining thereto as beneficiaries hereof with respect to the property so deposited with the Trustee payable to all or any

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of them and (vii) the obligations of the Issuer under Section 3.2) and the Trustee, at the expense of the Issuer, shall at the Issuer's request, execute proper instruments acknowledging the same, if

(a) with reference to this provision the Issuer has irrevocably deposited or caused to be irrevocably deposited with the Trustee as trust funds in trust, specifically pledged as security for, and dedicated solely to, the benefit of the Holders of the Securities of such series and Coupons appertaining thereto (i) cash in an amount, or (ii) in the case of any series of Securities the payments on which may only be made in Dollars, U.S. Government Obligations, maturing as to principal and interest at such times and in such amounts as will insure the availability of cash or (iii) a combination thereof, sufficient, in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee, to pay (A) the principal and interest on all Securities of such series and Coupons appertaining thereto on each date that such principal or interest is due and payable and (b) any mandatory sinking fund payments on the dates on which such payments are due and payable in accordance with the terms of the Indenture and the Securities of such series;

(b) such deposit will not result in a breach or violation of, or constitute a default under, any agreement or instrument to which the Issuer is a party or by which it is bound;

(c) the Issuer has delivered to the Trustee an Opinion of Counsel based on the fact that (x) the Issuer has received from, or there has been published by, the IRS a ruling or (y) since the date hereof, there has been a change in the applicable Federal income tax law, in either case to the effect that, and such opinion shall confirm that, the Holders of the Securities of such series and Coupons appertaining thereto will not recognize income, gain or loss for United States Federal income tax purposes as a result of such deposit, defeasance and discharge and will be subject to United States Federal income tax on the same amount and in the same manner and at the same times, as would have been the case if such deposit, defeasance and discharge had not occurred; and

(d) the Issuer has delivered to the Trustee an Officer's Certificate and an Opinion of Counsel, each stating that all conditions precedent provided for relating to the defeasance contemplated by this provision have been complied with.

(C) The Issuer shall be released from its obligations under Sections 3.6 and 9.1 and unless otherwise provided for in the Board Resolution, Officer's Certificate or Indenture supplemental hereto establishing such series of Securities, from all covenants and other obligations referred to in Section 2.3(18) or 2.3(19) with respect to such series of Securities, and any Coupons appertaining thereto, outstanding on and after the date the conditions set forth below are satisfied (hereinafter, "covenant defeasance"). For this purpose, such covenant defeasance means that, with respect to the Outstanding Securities of any series, the Issuer may omit to comply with and shall have no liability in respect of any term, condition or limitation

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set forth in such Section, whether directly or indirectly by reason of any reference elsewhere herein to such Section or by reason of any reference in such
Section to any other provision herein or in any other document and such omission to comply shall not constitute an Event of Default under Section 5.1, but the remainder of this Indenture and such Securities and Coupons shall be unaffected thereby. The following shall be the conditions to application of this subsection C of this Section 10.1:

(a) The Issuer has irrevocably deposited or caused to be deposited with the Trustee as trust funds in trust for the purpose of making the following payments, specifically pledged as security for, and dedicated solely to, the benefit of the holders of the Securities of such series and coupons appertaining thereto, (i) cash in an amount, or (ii) in the case of any series of Securities the payments on which may only be made in Dollars, U.S. Government Obligations maturing as to principal and interest at such times and in such amounts as will insure the availability of cash or (iii) a combination thereof, sufficient, in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee, to pay (A) the principal and interest on all Securities of such series and Coupons appertaining thereof and (B) any mandatory sinking fund payments on the day on which such payments are due and payable in accordance with the terms of the Indenture and the Securities of such series;

(b) No Event of Default or event which with notice or lapse of time or both would become an Event of Default with respect to the Securities shall have occurred and be continuing on the date of such deposit;

(c) Such covenant defeasance shall not cause the Trustee to have a conflicting interest as defined in Section 6.9 and for purposes of the Trust Indenture Act with respect to any securities of the Issuer;

(d) Such covenant defeasance shall not result in a breach or violation of, or constitute a default under, this Indenture or any other agreement or instrument to which the Issuer is a party or by which it is bound;

(e) Such covenant defeasance shall not cause any Securities then listed on any registered national securities exchange under the Exchange Act to be delisted;

(f) The Issuer shall have delivered to the Trustee an Officer's Certificate and Opinion of Counsel to the effect that the Holders of the Securities of such series and Coupons appertaining thereto will not recognize income, gain or loss for United States Federal income tax purposes as a result of such covenant defeasance and will be subject to United States Federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such covenant defeasance had not occurred; and

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(g) The Issuer shall have delivered to the Trustee an Officer's Certificate and an Opinion of Counsel, each stating that all conditions precedent provided for relating to the covenant defeasance contemplated by this provision have been complied with.

SECTION 10.2 APPLICATION BY TRUSTEE OF FUNDS DEPOSITED FOR PAYMENT OF SECURITIES. Subject to Section 10.4, all moneys deposited with the Trustee (for other trustee) pursuant to Section 10.1 shall be held in trust and applied by it to the payment, either directly or through any paying agent (including the Issuer acting as its own paying agent), to the Holders of the particular Securities of such series and of Coupons appertaining thereto for the payment or redemption of which such moneys have been deposited with the Trustee, of all sums due and to become due thereon for principal and interest; but such money need not be segregated from other funds except to the extent required by law.

SECTION 10.3 REPAYMENT OF MONEYS HELD BY PAYING AGENT. In connection with the satisfaction and discharge of this Indenture with respect to Securities of any series, all moneys then held by any paying agent under the provisions of this Indenture with respect to such series of Securities shall, upon demand of the Issuer, be repaid to it or paid to the Trustee and thereupon such paying agent shall be released from all further liability with respect to such moneys.

SECTION 10.4 RETURN OF MONEYS HELD BY TRUSTEE AND PAYING AGENT UNCLAIMED FOR TWO YEARS. Any moneys deposited with or paid to the Trustee or any paying agent for the payment of the principal of or interest on any Security of any series of Coupons attached thereto and not applied but remaining unclaimed for two years after the date upon which such principal or interest shall have become due and payable, shall, upon the written request of the Issuer and unless otherwise required by mandatory provisions of applicable escheat or abandoned or unclaimed property law, be repaid to the Issuer by the Trustee for such series or such paying agent, and the Holder of the Securities of such series and of any Coupons appertaining thereto shall, unless otherwise required by mandatory provisions of applicable escheat or abandoned or unclaimed property laws, thereafter look only to the Issuer for any payment which such Holder may be entitled to collect, and all liability of the Trustee or any paying agent with respect to such moneys shall thereupon cease; provided, that the Trustee or such paying agent, before being required to make any such repayment with respect to moneys deposited with it for any payment (a) in respect of Registered Securities of any series, shall at the expense of the Issuer, mail by first-class mail to Holders of such Securities at their addresses as they shall appear on the Security register, and (b) in respect of Unregistered Securities of any series, shall at the expense of the Issuer cause to the published once, in an Authorized Newspaper in the Borough of Manhattan, The City of New York and once in an Authorized Newspaper in London (and if required by Section 3.9, once in an Authorized Newspaper in Luxembourg), notice, that such moneys remain and that, after a date specified therein, which shall not be less than thirty days from the date of such mailing or publication, any unclaimed balance of such money then remaining will be repaid to the Issuer.

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SECTION 10.5 INDEMNITY FOR U.S. GOVERNMENT OF OBLIGATIONS. The Issuer shall pay and indemnify the Trustee against any tax, fee or other charge imposed on or assessed against the U.S. Government Obligations deposited pursuant to Section 10.1 or the principal or interest received in respect of such obligations.

ARTICLE XI

MISCELLANEOUS PROVISIONS

SECTION 11.1 INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS OF ISSUER EXEMPT FROM INDIVIDUAL LIABILITY. No recourse under or upon any obligation, covenant or agreement contained in this Indenture, or in any Security, or because of any indebtedness evidenced thereby, shall be had against any incorporator, as such or against any past, present or future stockholder, officer or director, as such, of the Issuer or of any successor, either directly or through the Issuer or any successor, under any rule of law, statute or constitutional provision or by the enforcement of any assessment or by any legal or equitable proceeding or otherwise, all such liability being expressly waived and released by the acceptance of the Securities and the Coupons, if any, appertaining thereto by the Holders thereof and as part of the consideration for the issue of the Securities and the Coupons appertaining thereto.

SECTION 11.2 PROVISIONS OF INDENTURE FOR THE SOLE BENEFIT OF
PARTIES AND HOLDERS OF SECURITIES AND COUPONS. Nothing in this Indenture, in the Securities or in the Coupons appertaining thereto, expressed or implied, shall give or be construed to give to any person, firm or corporation, other than the parties thereto and their successors and the Holders of the Securities or Coupons, if any, any legal or equitable right, remedy or claim under this Indenture or under any covenant or provision herein contained, all such covenants and provisions being for the sole benefit of the parties hereto and their successors and of the Holders of the Securities or Coupons, if any.

SECTION 11.3 SUCCESSORS AND ASSIGNS OF ISSUER BOUND BY INDENTURE. All the covenants, stipulations, promises and agreements in this Indenture contained by or in behalf of the Issuer shall bind its successors and assigns, whether so expressed or not.

SECTION 11.4 NOTICES AND DEMANDS ON ISSUER, TRUSTEE AND HOLDERS OF SECURITIES AND COUPONS. Any notice or demand which by any provision of this Indenture is required or permitted to be given or served by the Trustee or by the Holders of Securities or Coupons, if any, to or on the Issuer may be given or served by being deposited postage prepaid, first-class mail (except as otherwise specifically provided herein) addressed (until another address of the Issuer is filed by the Issuer with the Trustee) to McKesson Corporation, McKesson Plaza, One Post Street, San Francisco, California 94104, Attention:
Secretary. Any notice, direction, request or demand by the Issuer or any Holder of Securities or Coupons, if any, to or upon the Trustee shall be deemed to have been sufficiently

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given or served by being deposited postage prepaid, first-class mail (except as otherwise specifically provided herein) addressed (until another address of the Trustee is filed by the Trustee with the Issuer) to The First National Bank of Chicago, One First National Plaza, Suite 0126, Chicago, Illinois 60670-0126, Attention: Corporate Trust Services Division.

Where this Indenture provides for notice to Holders of Registered Securities, such notice shall be sufficiently given (unless otherwise herein expressly provided) if in writing and mailed, first-class mail, postage prepaid, to each Holder entitled thereto, at his last address as it appears in the Security register. In any case where notice to such Holders is given by mail, neither the failure to mail such notice, nor any defect in any notice so mailed, to any particular Holder shall affect the sufficiency of such notice with respect to other Holders. Where this Indenture provides for notice in any manner, such notice may be waived in writing by the person entitled to receive such notice, either before or after the event, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be filed with the Trustee, but such filing shall not be a condition precedent to the validity of any action taken in reliance upon such waiver.

In case, by reason of the suspension of or irregularities in regular mail service, it shall be impracticable to mail notice to the Issuer when such notice is required to the given pursuant to any provision of this Indenture, then any manner of giving such notice as shall be reasonably satisfactory to the Trustee shall be deemed to be a sufficient giving of such notice.

SECTION 11.5 OFFICER'S CERTIFICATES AND OPINIONS OF COUNSEL; STATEMENTS TO BE CONTAINED THEREIN. Upon any application or demand by the Issuer to the Trustee to take any action under any of the provisions of this Indenture, the Issuer shall furnish to the Trustee an Officer's Certificate stating that all conditions precedent provided for in this Indenture relating to the proposed action have been complied with and an Opinion of Counsel stating that in the opinion of such counsel all such conditions precedent have been complied with, except that in the case of any such application or demand as to which the furnishing of such documents is specifically required by any provision of this Indenture relating to such particular application or demand, no additional certificate or opinion need be furnished.

Each certificate or opinion provided for in this Indenture and delivered to the Trustee with respect to compliance with a condition or covenant provided for in this Indenture shall include (a) a statement that the person making such certificate or opinion has read such covenant or condition, (b) a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based, (c) a statement that, in the opinion of such person, he has made such examination or investigation as is necessary to enable him to express an informed opinion as to whether or not such covenant or condition has been complied with and (d) a statement as to whether or not, in the opinion of such person, such condition or covenant has been complied with.

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Any certificate, statement or opinion of an officer of the Issuer may be based, insofar as it relates to legal matters, upon a certificate or opinion of or representations by counsel, unless such officer knows that the certificate or opinion or representations with respect to the matters upon which his certificate, statement or opinion may be based as aforesaid are erroneous, or in the exercise of reasonable care should know that the same are erroneous. Any certificate, statement or opinion of counsel may be based, insofar as it relates to factual matters or information with respect to which is in the possession of the Issuer, upon the certificate, statement or opinion of or representations by an officer of officers of the Issuer, unless such counsel knows that the certificate, statement or opinion or representations with respect to the matters upon which his certificate, statement or opinion may be based as aforesaid are erroneous, or in the exercise of reasonable care should know that the same are erroneous.

Any certificate, statement or opinion of an officer of the Issuer or of counsel may be based, insofar as it relates to accounting matters, upon a certificate or opinion of or representations by an accountant or firm of accountants in the employ of the Issuer, unless such officer or counsel, as the case may be, knows that the certificate or opinion of or representations with respect to the accounting matters upon which his certificate, statement or opinion may be based as aforesaid are erroneous, or in the exercise of reasonable care should know that the same are erroneous.

Any certificate or opinion of any independent firm of public accountants filed with and directed to the Trustee shall contain a statement that such firm is independent.

SECTION 11.6 PAYMENTS DUE ON SATURDAYS, SUNDAYS AND HOLIDAYS. If the date of maturity of interest on or principal of the Securities of any series or any Coupons appertaining thereto or the date fixed for redemption or repayment of any such Security or Coupon shall not be a Business Day, then payment of interest or principal need not be made on such date, but may be made on the next succeeding Business Day with the same force and effect as if made on the date of maturity or the date fixed for redemption, and no interest shall accrue for the period after such date.

SECTION 11.7 CONFLICT OF ANY PROVISION OF INDENTURE WITH TRUST INDENTURE ACT. If and to the extent that any provision of this Indenture limits, qualifies or conflicts with duties imposed by, or with another provision (an "incorporated provision") included in this Indenture by operation of Sections 310 to 318, inclusive, of the Trust Indenture Act, such imposed duties or incorporated provision shall control.

SECTION 11.8 NEW YORK LAW TO GOVERN. THIS INDENTURE AND EACH SECURITY AND COUPON SHALL BE DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF SUCH STATE, WITHOUT REGARD TO THE CONFLICTS OF LAW PRINCIPLES THEREOF.

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SECTION 11.9 COUNTERPARTS. This Indenture may be executed in any number of counterparts, each of which shall be an original; but such counterparts shall together constitute but one and the same instrument.

SECTION 11.10 EFFECT OF HEADINGS. The Article and Section headings herein and the Table of Contents are for convenience only and shall not affect the construction hereof.

SECTION 11.11 SECURITIES IN A FOREIGN CURRENCY OR IN ECU. Unless otherwise specified in an Officer's Certificate delivered pursuant to Section 2.3 of this Indenture with respect to a particular series of Securities, whenever for purposes of this Indenture any action may be taken by the Holders of a specified percentage in aggregate principal amount of Securities of all series or all series affected by a particular action at the time Outstanding and, at such time, there are Outstanding Securities of any series which are denominated in a coin or currency other than Dollars (including ECUs), then the principal amount of Securities of such series which shall be deemed to be Outstanding for the purpose of taking such action shall be that amount of Dollars that could be obtained for such amount at the Market Exchange Rate. For purposes of this Section 11.11, Market Exchange Rate shall mean the noon Dollar buying rate in The New York City for cable transfers of that currency as published by the Federal Reserve Bank of New York; provided, in the case of ECUs, Market Exchange Rate shall mean the rate of exchange determined by the Commission of the European Communities (or any successor thereto) as published in the Official Journal of the European Communities (such publication or any successor publication, the "Journal"). If such Market Exchange Rate is not available for any reason with respect to such currency, the Trustee shall use, in its sole discretion and without liability on its part, such quotation of the Federal Reserve Bank of New York or, in the case of ECUs, the rate of exchange as published in the Journal, as of the most recent available date, or quotations or, in the case of ECUs, rates of exchange from one or more major banks in The City of New York or in the country of issue of the currency in question, which for purposes of the ECU shall be Brussels, Belgium, or such other quotations or, in the case of ECU, rates of exchange as the Trustee shall deem appropriate. The provisions of this paragraph shall apply in determining the equivalent principal amount in respect of Securities of a series denominated in a currency other than Dollars in connection with any action taken by Holders of Securities pursuant to the terms of this Indenture.

All decisions and determinations of the Trustee regarding the Market Exchange Rate or any alternative determination provided for in the preceding paragraph shall be in its sole discretion and shall, in the absence of manifest error, be conclusive to the extent permitted by law for all purposes and irrevocably binding upon the Issuer and all Holders.

SECTION 11.12 JUDGMENT CURRENCY. The Issuer agrees, to the fullest extent that it may effectively do so under applicable law, that (a) if for the purpose of obtaining judgment in any court it is necessary to convert the sum due in respect of the principal of or interest on the Securities of any series (the "Required Currency") into a currency in which a judgment will be rendered (the "Judgment Currency"), the rate of exchange used shall be the

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rate at which in accordance with normal banking procedures the Trustee could purchase in The City of New York the Required Currency with the Judgment Currency on the day on which final unappealable judgment is entered, unless such day is not a New York Banking Day, then, to the extent permitted by applicable law, the rate of exchange used shall be the rate at which in accordance with normal banking procedures the Trustee could purchase in The City of New York the Required Currency with the Judgment Currency on the New York Banking Day preceding the day on which final unappealable judgment is entered and (b) its obligations under this Indenture to make payments in the Required Currency (i) shall not be discharged or satisfied by any tender, or any recovery pursuant to any judgment (whether or not entered in accordance with subsection (a)), in any currency other than the Required Currency, except to the extent that such tender or recovery shall result in the actual receipt, by the payee, of the full amount of the Required Currency expressed to be payable in respect of such payments,
(ii) shall be enforceable as an alternative or additional cause of action for the purpose of recovering in the Required Currency the amount, if any, by which such actual receipt shall fall short of the full amount of the Required Currency so expressed to be payable and (iii) shall not be affected by judgment being obtained for any other sum due under this Indenture. For purposes of the foregoing, "New York Banking Day" means any day except a Saturday, Sunday or a legal holiday in The City of New York or a day on which banking institutions in The City of New York are authorized or required by law or executive order to close.

ARTICLE XII

REDEMPTION OF SECURITIES AND SINKING FUNDS

SECTION 12.1 APPLICABILITY OF ARTICLE. The provisions of this Article shall be applicable to the Securities of any series which are redeemable before their maturity or to any sinking fund for the retirement of Securities of a series except as otherwise specified as contemplated by Section 2.3 for Securities of such series.

SECTION 12.2 NOTICE OF REDEMPTION; PARTIAL REDEMPTIONS. Notice of redemption to the Holders of Registered Securities of any series to be redeemed as a whole or in part at the option of the Issuer shall be given by mailing notice of such redemption by first class mail, postage prepaid, at least 30 days and not more than 60 days prior to the date fixed for redemption to such Holders of Securities of such series at their last addresses as they shall appear upon the registry books. Notice of redemption to the Holders of Unregistered Securities to be redeemed as a whole or in part, who have filed their names and addresses with the Trustee pursuant to Section 313(c)(2) of the Trust Indenture Act shall be given by mailing notice of such redemption, by first class mail, postage prepaid, at least 30 days and not more than 60 prior to the date fixed for redemption, to such Holders at such addresses as were so furnished to the Trustee (and, in the case of any such notice given by the Issuer, the Trustee shall make such information available to the Issuer for such purpose). Notice of redemption to all other Holders of Unregistered Securities shall be published in an Authorized Newspaper in the Borough of Manhattan, The City of New York and in an Authorized Newspaper in London (and, if required by
Section 3.9, in an Authorized Newspaper in

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Luxembourg), in each case, once in each of three successive calendar weeks, the first publication to be not less than 30 nor more than 60 days prior to the date fixed for redemption. Any notice which is mailed in the manner herein provided shall be conclusively presumed to have been duly given, whether or not the Holder receives the notice. Failure to give notice by mail, or any defect in the notice to the Holder of any Security of a series designated for redemption as a whole or in part shall not affect the validity of the proceedings for the redemption of such Security of such series.

The notice of redemption to each such Holder shall specify the principal amount of each Security of such series held by such Holder to be redeemed, the date fixed for redemption, the redemption price, the place or places of payment, that payment will be made upon presentation and surrender of such Securities and, in the case of Securities with Coupons attached thereto, of all Coupons appertaining thereto maturing after the date fixed for redemption, that such redemption is pursuant to the mandatory or optional sinking fund, or both, if such be the case, that interest accrued to the date fixed for redemption will be paid as specified in such notice and that on and after said date interest thereon or on the portions thereof to be redeemed will cease to accrue. In case any Security of a series is to be redeemed in part only the notice of redemption shall state the portion of the principal amount thereof to be redeemed and shall state that on and after the date fixed for redemption, upon surrender of such Security, a new Security or Securities of such series in principal amount equal to the unredeemed portion thereof will be issued.

The notice of redemption of Securities of any series to be redeemed at the option of the Issuer shall be given by the Issuer or, at the Issuer's request, by the Trustee in the name and at the expense of the Issuer.

On or before the redemption date specified in the notice of redemption given as provided in this Section, the Issuer will deposit with the Trustee or with one or more paying agents (or, if the Issuer is acting as its own paying agent, set aside, segregate and holder in trust as provided in
Section 3.4) an amount of money sufficient to redeem on the redemption date all the Securities of such series so called for redemption at the appropriate redemption price, together with accrued interest to the date fixed for redemption. The Issuer will deliver to the Trustee at least 70 days prior to the date fixed for redemption, or such shorter period as shall be acceptable to the Trustee, an Officer's Certificate stating the aggregate principal amount of Securities to be redeemed. In case of a redemption at the election of the Issuer prior to the expiration of any restriction on such redemption, the Issuer shall deliver to the Trustee, prior to the giving of any notice of redemption to Holders pursuant to this Section, an Officer's Certificate stating that such restriction has been complied with.

If less than all the Securities of a series are to be redeemed, the Trustee shall select, in such manner as it shall deemed appropriate and fair, in its sole discretion, Securities of such series to be redeemed in whole or in part. Securities may be redeemed in part in multiples equal to the minimum authorized denomination for Securities of such series or any multiple thereof. The Trustee shall promptly notify the Issuer in writing of the Securities of

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such series selected for redemption and, in the case of any Securities of such series selected for partial redemption, the principal amount thereof to be redeemed. For all purposes of this Indenture, unless the context otherwise requires, all provisions relating to the redemption of Securities of any series shall relate, in the case of any Security redeemed or to be redeemed only in part, to the portion of the principal amount of such Security which has been or is to be redeemed.

SECTION 12.3 PAYMENT OF SECURITIES CALLED FOR REDEMPTION. If notice of redemption has been given as above provided, the Securities or portions of Securities specified in such notice shall become due and payable on the date and at the place stated in such notice at the applicable redemption price, together with interest accrued to the date fixed for redemption, and on and after said date (unless the Issuer shall default in the payment of such Securities at the redemption price, together with interest accrued to said date) interest on the Securities or portions of Securities so called for redemption shall cease to accrue, and the unmatured Coupons, if any, appertaining thereto shall be void, and, except as provided in Sections 6.5 and 10.4, such Securities shall cease from and after the date fixed for redemption to be entitled to any benefit or security under this Indenture, and the Holders thereof shall have no right in respect of such Securities except the right to receive the redemption price thereof and unpaid interest to the date fixed for redemption. On presentation and surrender of such Securities at a place of payment specified in said notice, together with all Coupons, if any, appertaining thereto maturing after the date fixed for redemption, said Securities or the specified portions thereof shall be paid and redeemed by the Issuer at the applicable redemption price, together with interest accrued thereon to the date fixed for redemption; provided, that payment of interest becoming due on or prior to the date fixed for redemption shall be payable in the case of Securities with Coupons attached thereto, to the Holders of the Coupons for such interest upon surrender thereof, and in the case of Registered Securities, to the Holder of such Registered Securities registered as such on the relevant record date, subject to the terms and provisions of Section 2.3 and 2.7 hereof.

If any Security called for redemption shall not be so paid upon surrender thereof for redemption, the principal shall, until paid or duly provided for, bear interest from the date fixed for redemption at the rate of interest or Yield to Maturity (in the case of an Original Issue Discount Security) borne by such Security.

If any Security with Coupons attached thereto is surrendered for redemption and is not accompanied by all appurtenant Coupons maturing after the date fixed for redemption, the surrender of such missing Coupon or Coupons may be waived by the Issuer and the Trustee, if there be furnished to each of them such security or indemnity as they may require to save each of them harmless.

Upon presentation of any Security redeemed in part only, the Issuer shall execute and the Trustee shall authenticate and deliver to or on the order of the Holder thereof, at the expense of the Issuer, a new Security or Securities of such series, of authorized denominations, in principal amount equal to the unredeemed portion of the Security so presented.

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SECTION 12.4 EXCLUSION OF CERTAIN SECURITIES FROM ELIGIBILITY FOR SELECTION FOR REDEMPTION. Securities shall be excluded from eligibility for selection for redemption if they are identified by registration and certificate number in an Officer's Certificate delivered to the Trustee at least 40 days prior to the last date on which notice of redemption may be given as being owned of record and beneficially by, and not pledged or hypothecated by, either (a) the Issuer or (b) an entity specifically identified in such written statement as directly or indirectly controlling or controlled by or under direct or indirect common control with the Issuer.

SECTION 12.5 MANDATORY AND OPTIONAL SINKING FUNDS. The minimum amount of any sinking fund payment provided for by the terms of the Securities of any series is herein referred to as a "mandatory sinking fund payment," and any payment in excess of such minimum amount provided for by the terms of the Securities of any series is herein referred to as an "optional sinking fund payment." The date on which a sinking fund payment is to be made is herein referred to as the "sinking fund payment date."

In lieu of making all or any part of any mandatory sinking fund payment with respect to any series of Securities in cash, the Issuer may at its option (a) deliver to the Trustee Securities of such series theretofore purchased or otherwise acquired (except upon redemption pursuant to the mandatory sinking fund) by the Issuer or receive credit for Securities of such series (not previously so credited) theretofore purchased or otherwise acquired (except as aforesaid) by the Issuer and delivered to the Trustee for cancellation pursuant to Section 2.10, (b) receive credit for optional sinking fund payments (not previously so credited) made pursuant to this Section, or (c) receive credit for Securities of such series (not previously so credited) redeemed by the Issuer through any optional redemption provision contained in the terms of such series. Securities so delivered or credited shall be received or credited by the Trustee at the sinking fund redemption price specified in such Securities.

On or before the 60th day next preceding each sinking fund payment date for any series, the Issuer will deliver to the Trustee an Officer's Certificate (which need not contain the statements required by Section 11.5) (a) specifying the portion of the mandatory sinking fund payment to be satisfied by payment of cash and the portion to be satisfied by credit of Securities of such series and the basis for such credit, (b) stating that none of the Securities of such series has theretofore been so credited, (c) stating that no defaults in the payment of interest or Events of Default with respect to such series have occurred (which have not been waived or cured) and are continuing and (d) stating whether or not the Issuer intends to exercise its right to make an optional sinking fund payment with respect to such series and, if so, specifying the amount of such optional sinking fund payment which the Issuer intends to pay on or before the next succeeding sinking fund payment date. Any Securities of such series to be credited and required to be delivered to the Trustee in order for the Issuer to be entitled to credit therefor as aforesaid which have not theretofore been delivered to the Trustee shall be delivered for cancellation pursuant to Section 2.10 to the Trustee with such Officer's Certificate (or reasonably promptly thereafter if acceptable to the Trustee). Such Officer's Certificate shall be irrevocable and upon its receipt by the Trustee the Issuer shall become unconditionally obligated to make all the cash

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payments or payments therein referred to, if any, on or before the next succeeding sinking fund payment date. Failure of the Issuer, on or before any such 60th day, to deliver such Officer's Certificate and Securities specified in this paragraph, if any, shall not constitute a default but shall constitute, on and as of such date, the irrevocable election of the Issuer (i) that the mandatory sinking fund payment for such series due on the next succeeding sinking fund payment date shall be paid entirely in cash without the option to deliver or credit Securities of such series in respect thereof and (ii) that the Issuer will make no optional sinking fund payment with respect to such series as provided in this Section.

If the sinking fund payment or payments (mandatory or optional or both) to be made in cash on the next succeeding sinking fund payment date plus any unused balance of any preceding sinking fund payments made in cash shall exceed $50,000 (or the equivalent thereof in any Foreign Currency or ECU) or a lesser sum in Dollars (or the equivalent thereof in any Foreign Currency or ECU) if the Issuer shall so request with respect to the Securities of any particular series, such cash shall be applied on the next succeeding sinking fund payment date to the redemption of Securities of such series at the sinking fund redemption price together with accrued interest to the date fixed for redemption. If such amount shall be $50,000 (or the equivalent thereof in any Foreign Currency or ECU) or less and the Issuer makes no such request then it shall be carried over until a sum in excess of $50,000 (or the equivalent thereof in any Foreign Currency or ECU) is available. The Trustee shall select, in the manner provided in Section 12.2, for redemption on such sinking fund payment date a sufficient principal amount of Securities of such series to absorb said cash, as nearly as may be, and shall (if requested in writing by the Issuer) inform the Issuer of the serial numbers of the Securities of such series (or portions thereof) so selected. Securities shall be excluded from eligibility for redemption under this Section if they are identified by registration and certificate number in an Officer's Certificate delivered to the Trustee at least 60 days prior to the sinking fund payment date as being owned of record and beneficially by, and not pledged or hypothecated by, either (a) the Issuer or
(b) an entity specifically identified in such Officer's Certificate as directly or indirectly controlling or controlled by or under direct or indirect common control with the Issuer. The Trustee, in the name and at the expense of the Issuer (or the Issuer, if it shall so request the Trustee in writing) shall cause notice of redemption of the Securities of such series to be given in substantially the manner provided in Section 12.2 (and with the effect provided in Section 12.3) for the redemption of Securities of such series in part at the option of the Issuer. The amount of any sinking fund payments not so applied or allocated to the redemption of Securities of such series shall be added to the next cash sinking fund payment for such series and, together with such payment, shall be applied in accordance with the provisions of this Section. Any and all sinking fund moneys held on the stated maturity date of the Securities of any particular series (or earlier, if such maturity is accelerated), which are not held for the payment or redemption of particular Securities of such series shall be applied, together with other moneys, if necessary, sufficient for the purpose, to the payment of the principal of, and interest on, the Securities of such series at maturity.

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On or before each sinking fund payment date, the Issuer shall pay to the Trustee in cash or shall otherwise provide for the payment of all interest accrued to the date fixed for redemption on Securities to be redeemed on the next following sinking fund payment date.

The Trustee shall not redeem or cause to be redeemed any Securities of a series with sinking fund moneys or give any notice of redemption of Securities for such series by operation of the sinking fund during the continuance of a default in payment of interest on such Securities or of any Event of Default except that, where the giving of notice of redemption of any Securities shall theretofore have been made, the Trustee shall redeem or cause to be redeemed such Securities, provided that it shall have received from the Issuer a sum sufficient for such redemption. Except as aforesaid, any moneys in the sinking fund for such series at the time when any such default or Event of Default shall occur, and any moneys thereafter paid into the sinking fund, shall, during the continuance of such default or Event of Default be deemed to have been collected under Article Five and held for the payment of all such Securities. In case such Event of Default shall have been waived as provided in
Section 5.10 or the default cured on or before the sixtieth day preceding the sinking fund payment date in any year, such moneys shall thereafter be applied on the next succeeding sinking fund payment date in accordance with this Section to the redemption of such Securities.

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IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed and attested as of the date first written above.

McKESSON CORPORATION

                                       By:    /s/ Richard H. Hawkins
                                              ----------------------
                                              Name:      Richard H. Hawkins
                                              Title:     Vice President and
                                                         Chief Financial Officer



Attest:



By:      /s/ Lorraine Peetz
         ------------------

THE FIRST NATIONAL BANK OF CHICAGO,
as Trustee

                                       By:    /s/ Richard D. Manella
                                              ----------------------
                                              Name:      Richard D. Manella
                                              Title:     Vice President




Attest:


By:      /s/ Janice Ott Rotunno

         ----------------------


Exhibit 4.2

OFFICER'S CERTIFICATE

The undersigned, McKesson Corporation, a Delaware corporation (the "Corporation"), hereby certifies through Nancy A. Miller, its Vice President and Secretary, pursuant to Section 2.3 of the Indenture, dated as of March 11, 1997 (the "Indenture"), by and between the Company, as Issuer, and First National Bank of Chicago, a national association, as Trustee, as follows:

1. She has read Section 2.3 of the Indenture, read such other documents as she deemed necessary and made such other inquiries as she deemed necessary to make the certifications in paragraph 2 and 3 hereof.

2. Pursuant to the terms of resolutions adopted by the Board of Directors of the Corporation (the "Board of Directors") dated January 29, 1997 and the Finance Committee of the Board of Directors dated March 6, 1997 and action of officers of the Corporation dated March 11, 1997, the terms of the Corporation's 6.60% Notes due 2000, 6-7/8% Notes due 2002 and 7.65% Debentures due 2027 set forth in Annex A, Annex B and Annex C, respectively, attached hereto have been duly adopted by the Corporation.

3. All conditions precedent provided for in the Indenture relating to the issuance of such securities have been complied with.


IN WITNESS WHEREOF, the undersigned has caused this certificate to be executed by its duly authorized officer as of this 11th day of March 1997.

McKESSON CORPORATION

By:  /s/ Nancy A. Miller
     -------------------
      Nancy A. Miller
      Vice President and
      Secretary


ANNEX A

Pursuant to Section 2.3 of the Indenture, dated as of March 11, 1997 (the "Indenture"), between McKesson Corporation (the "Issuer") and The First National Bank of Chicago, a national banking association, as trustee (the "Trustee"), the terms of a series of securities to be issued pursuant to the Indenture are as follows:

1. Designation. The designation of the securities is "6.60% Notes due March 1, 2000" (the "Notes due 2000").

2. Aggregate Principal Amount. The Notes due 2000 shall be limited in aggregate principal amount to $175,000,000 (except for Notes due 2000 authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Notes due 2000 pursuant to Section 2.8, 2.9, 2.11, 8.5 or 12.3 of the Indenture).

3. Currency Denomination. The Notes due 2000 shall be denominated in Dollars.

4. Maturity. The date on which the principal of the Notes due 2000 is payable is March 1, 2000.

5. Rate of Interest; Interest Payment Date; Regular Record
Dates. Each Note due 2000 shall bear interest from March 1, 1997 at 6.60% per annum until the principal thereof is paid. Such interest shall be payable semiannually in arrears on March 1 and September 1 of each year, commencing on September 1, 1997, to the persons in whose names the Notes due 2000 are registered at the close of business on the immediately preceding February 15 and August 15, respectively. Interest on the Notes due 2000 shall accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of original issuance. Interest on the Notes due 2000 shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which principal, premium, if any, or interest is payable on the Notes due 2000 is not a Business Day, then payment of the principal, premium, if any, or

interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of any such delay).

6. Place of Payment. Principal of, premium, if any, and interest on the Notes due 2000 shall be payable, and the transfer of Notes due 2000 shall be registrable, at the office or agency of the Issuer to be maintained for such purpose in the Borough of Manhattan, The City of New York, except that, at the option of the Issuer, interest may be paid by mailing a check to the address of the person entitled thereto as it appears on the Notes due 2000 register; provided, however, that while any Notes due 2000 are represented by a Registered Global Security, payment of principal of, premium, if any, or interest on the Notes due 2000 may be made by wire transfer to the account of the Depositary or its nominee.

7. Optional Redemption. The Notes due 2000 are not optionally redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

8. Mandatory Redemption. The Notes due 2000 are not mandatorily redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

9. Denominations. The Notes due 2000 shall be issued initially in minimum denominations of $100,000 and shall be issued in integral multiples of $1,000 in excess thereof.

10. Amount Payable Upon Acceleration. The principal of the Notes due 2000 shall be payable upon declaration of acceleration pursuant to Section 5.1 of the Indenture.

11. Payment Currency. Principal and interest on the Notes due 2000 shall be payable in Dollars.

12. Payment Currency - Election. The principal of and interest on the Notes due 2000 shall not be payable in a currency other than Dollars.

13. Payment Currency - Index. The principal of and interest on the Notes due 2000 shall not be determined with reference to an index based on a coin or currency.

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14. Registered Securities. The Notes due 2000 shall be issuable as Registered Securities. The Notes due 2000 may be issued as Registered Global Securities.

15. Additional Amounts. The Issuer shall not pay additional amounts on the Notes due 2000 held by a Person that is not a U.S. Person in respect of taxes or similar charges withheld or deducted.

16. Definitive Certificates. Section 2.8 of the Indenture will govern the transferability of Notes due 2000 in definitive form.

17. Registrar; Paying Agent; Depositary. The Trustee shall initially serve as the registrar and the paying agent for the Notes due 2000. The Depository Trust Company shall initially serve as the Depositary for the Registered Global Security representing Notes due 2000.

18. Events of Default; Covenants. There shall be no deletions from, modifications or additions to the Events of Default set forth in Section 5.1 of the Indenture with respect to the Notes due 2000. There shall be the following additions to the covenants of the Issuer set forth in Article III with respect to the Notes due 2000:

Limitation on Liens. The Issuer covenants that, so long as any of the Notes due 2000 remain outstanding, it shall not, nor shall it permit any Consolidated Subsidiary to, create or assume any Indebtedness for money borrowed which is secured by a mortgage, pledge, security interest or lien ("liens") of or upon any assets, whether now owned or hereafter acquired, of the Issuer or any such Consolidated Subsidiary without equally and ratably securing the Notes due 2000 by a lien ranking ratably with and equal to (or at the option of the Issuer, senior to) such secured Indebtedness, except that the foregoing restriction shall not apply to (a) liens on any assets of any corporation existing at the time such corporation becomes a Consolidated Subsidiary; (b) liens on any assets existing at the time of acquisition of such assets by the Issuer or a Consolidated Subsidiary, or liens to secure the payment of all or any part of the purchase price of such assets upon the acquisition of such assets by the Issuer or a Consolidated Subsidiary or to secure any indebtedness incurred or

3

guaranteed by the Issuer or a Consolidated Subsidiary prior to, at the time of, or within 360 days after such acquisition (or in the case of real property, the completion of construction (including any improvements on an existing asset) or commencement of full operation of such asset, whichever is later) which indebtedness is incurred or guaranteed for the purpose of financing all or any part of the purchase price thereof or, in the case of real property, construction or improvements thereon; provided, however, that in the case of any such acquisition, construction or improvement, the lien shall not apply to any assets theretofore owned by the Issuer or a Consolidated Subsidiary, other than, in the case of any such construction or improvement, any real property on which the property so constructed, or the improvement, is located, or to secure the payment of the purchase price of such assets, or to secure indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary for the purpose of financing the purchase price of such assets or improvements or construction thereon, which indebtedness is incurred or guaranteed prior to, at the time of or within 360 days after such acquisition (or in the case of real property, completion of such improvement or construction or commencement of full operation of such property, whichever is later); (c) liens on any assets securing indebtedness owed by any Consolidated Subsidiary to the Issuer or another wholly owned Subsidiary; (d) liens on any assets of a corporation existing at the time such corporation is merged into or consolidated with the Issuer or a Subsidiary or at the time of a purchase, lease or other acquisition of the assets of a corporation or firm as an entirety or substantially as an entirety by the Issuer or a Subsidiary;
(e) liens on any assets of the Issuer or a Consolidated Subsidiary in favor of the United States of America or any state thereof, or any department, agency or instrumentality or political subdivision of the United States of America or any State thereof, or in favor of any other country, or any political subdivision thereof, to secure partial, progress, advance or other payments pursuant to any contract or statute or to secure any indebtedness incurred or guaranteed for the purpose of financing all or any part of the purchase price (or, in the case of real property, the cost of construction) of the assets subject to such liens (including, but not limited to, liens incurred in connection with pollution control, industrial revenue or similar financing); (f) any extension, renewal or replacement (or successive extensions, renewals or replacements), in whole or in part, of

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any lien referred to in the foregoing clauses (a) to (e), inclusive; provided, however, that the principal amount of indebtedness secured thereby shall not exceed the principal amount of indebtedness so secured at the time of such extension, renewal or replacement, and that such extension, renewal or replacement shall be limited to all or a part of the assets which secured the lien so extended, renewed or replaced (plus improvements and construction on such real property); (g) liens imposed by law, such as mechanics', workmen's, repairmen's, materialmen's, carriers', warehousemen's, vendors' or other similar liens arising in the ordinary course of business, or governmental (federal, state or municipal) liens arising out of contracts for the sale of products or services by the Issuer or any Consolidated Subsidiary, or deposits or pledges to obtain the release of any of the foregoing liens; (h) pledges, liens or deposits under worker's compensation laws or similar legislation and liens or judgments thereunder which are not currently dischargeable, or in connection with bids, tenders, contracts (other than for the payment of money) or leases to which the Issuer or any Consolidated Subsidiary is a party, or to secure public or statutory obligations of the Issuer or any Consolidated Subsidiary, or in connection with obtaining or maintaining self-insurance or to obtain the benefits of any law, regulation or arrangement pertaining to unemployment insurance, old age pensions, social security or similar matters, or to secure surety, appeal or customs bonds to which the Issuer or any Consolidated Subsidiary is a party, or in litigation or other proceedings such as, but not limited to, interpleader proceedings, and other similar pledges, liens or deposits made or incurred in the ordinary course of business; (i) liens created by or resulting from any litigation or other proceeding which is being contested in good faith by appropriate proceedings, including liens arising out of judgements or awards against the Issuer or any Consolidated Subsidiary with respect to which the Issuer or such Consolidated Subsidiary is in good faith prosecuting an appeal or proceedings for review or for which the time to make an appeal has not yet expired; or final unappealable judgment liens which are satisfied within 15 days of the date of judgment; or liens incurred by the Issuer or any Consolidated Subsidiary for the purpose of obtaining a stay or discharge in the course of any litigation or other proceeding to which the Issuer or such Consolidated Subsidiary is a party; or (j) liens for taxes or assessments or governmental charges

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or levies not yet due or delinquent, or which can thereafter be paid without penalty, or which are being contested in good faith by appropriate proceedings; landlord's liens on property held under lease; and any other liens or charges incidental to the conduct of the business of the Issuer or any Consolidated Subsidiary or the ownership of the assets of any of them which were not incurred in connection with the borrowing of money or the obtaining of advances or credit and which do not, in the opinion of the Issuer, materially impair the use of such assets in the operation of the business of the Issuer or such Consolidated Subsidiary or the value of such assets for the purposes thereof. Notwithstanding the above, the Issuer or any Consolidated Subsidiary may, without securing the Notes due 2000, create or assume any Indebtedness which is secured by a lien which would otherwise be subject to the foregoing restrictions, provided that at the time of such creation or assumption, after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

Limitation on Sale and Lease-Back Transactions. The Issuer covenants that, so long as any of the Notes due 2000 remain outstanding, it will not, nor shall it permit any Consolidated Subsidiary to, enter into any sale and lease- back transaction with respect to any assets, other than any sale leaseback transaction (involving a lease for a term of not more than three years), unless either (a) the Issuer or such Consolidated Subsidiary would be entitled to incur Indebtedness secured by a lien on the assets to be leased in an amount at least equal to the Attributable Debt in respect of such transaction without equally and ratably securing the Notes due 2000 pursuant to clauses (a) through (j) inclusive of the covenant with respect to "Limitation on Liens" above, or (b) the proceeds of the sale of the assets to be leased are at least equal to their fair market value (as determined by the Board of Directors of the Issuer) and the proceeds are applied to the purchase or acquisition (or, in the case of real property, the construction) of assets or to the retirement (other than at maturity or pursuant to a mandatory sinking fund or mandatory redemption provision) of indebtedness. The foregoing limitation shall not apply, if at the time the Issuer or any Consolidated Subsidiary enters into such sale and lease-back transaction, and after giving effect thereto, Exempted Debt does not exceed 10% of the

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total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

The term "Attributable Debt" in connection with a sale and lease-back transaction shall mean, as of the date of determination, the lesser of (a) the fair value of the assets subject to such transaction or (b) the present value (discounted at the rate of interest set forth in or implicit in the terms of such lease or, if it is not practicable to determine such rate, the weighted average interest rate per annum borne by all series of Securities then Outstanding and subject to the Limitation on Sale and Leaseback Transactions compounded semiannually, in either case as determined by the principal accounting or financial officer of the Issuer) of the obligations of the Issuer or any Consolidated Subsidiary for net rental payments during the remaining term of all leases (including any period for which such lease has been extended or may, at the option of the lessor, be extended). The term "net rental payments" under any lease of any period shall mean the sum of the rental and other payments required to be paid in such period by the lessee thereunder, not including, however, any amounts required to be paid by such lessee (whether or not designated as rental or additional rental) on account of maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges required to be paid by such lessee thereunder or any amounts required to be paid by such lessee thereunder contingent upon the amount of sales, maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges. The term "Consolidated Subsidiary" shall mean any Subsidiary substantially all the property of which is located, and substantially all the operations of which are conducted, in the United States of America whose financial statements are consolidated with those of the Issuer in accordance with generally accepted accounting principles. The term "Exempted Debt" shall mean the sum of the following as of the date of determination:
(i) Indebtedness of the Issuer and its Consolidated Subsidiaries incurred after the date of the Indenture and secured by liens not permitted to be created or assumed pursuant to the covenant with respect to "Limitation on Liens" above, and (ii) Attributable Debt of the Issuer and its Consolidated Subsidiaries in respect of every sale and lease-back transaction entered into after the date of the Indenture, other than leases expressly permitted by the

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covenant with respect to "Limitation on Sale and Lease-Back Transactions" above. The term "Indebtedness" shall mean all items classified as indebtedness on the most recently available consolidated balance sheet of the Issuer and its Consolidated Subsidiaries, in accordance with generally accepted accounting principles.

19 Conversion and Exchange. The Notes due 2000 shall not be convertible into or exchangeable into any other security; provided that this provision shall not limit the Issuer's ability to consummate an exchange offer as contemplated by the Registration Rights Agreement, dated as of March 11, 1997, by and among the Issuer, Morgan Stanley & Co. Incorporated, BancAmerica Securities, Inc., Chase Securities Inc. and J.P. Morgan Securities Inc.

20. Other Terms. The Notes due 2000 shall have the other terms and shall be substantially in the form set forth in the form of Notes due 2000 attached hereto as Exhibit A. In case of any conflict between this Annex A and the Notes due 2000 in the form attached hereto as Exhibit A, the form of the Notes due 2000 shall control.

Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Indenture.

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EXHIBIT A

[FORM OF FACE OF NOTE DUE MARCH 1, 2000]

[IF THE NOTE DUE 2000 IS TO BE A GLOBAL SECURITY, INSERT THE FOLLOWING

- - THIS NOTE DUE 2000 IS A BOOK-ENTRY SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A DEPOSITARY. THIS NOTE DUE 2000 IS EXCHANGEABLE FOR NOTES DUE 2000 REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS NOTE DUE 2000 (OTHER THAN A TRANSFER OF THIS NOTE DUE 2000 AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY) MAY BE REGISTERED EXCEPT IN SUCH LIMITED CIRCUMSTANCES.

UNLESS THIS NOTE DUE 2000 IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY NOTE DUE 2000 ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT HEREON IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

No. __________ CUSIP NO. ________

MCKESSON CORPORATION

6.60% NOTE DUE MARCH 1, 2000

[PRIOR TO THE TRANSFER RESTRICTION TERMINATION DATE, ANY CERTIFICATE EVIDENCING A NOTE DUE 2000 SHALL BEAR A LEGEND IN SUBSTANTIALLY THE FOLLOWING FORM, UNLESS OTHERWISE AGREED BY THE ISSUER (WITH WRITTEN NOTICE THEREOF TO THE


TRUSTEE): THE SECURITY EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) OR (B) IT IS AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(A)(1), (2),
(3) OR (7) UNDER THE SECURITIES ACT) ("INSTITUTIONAL ACCREDITED INVESTOR") OR
(C) IT IS NOT A U.S. PERSON AND IS ACQUIRING THE SECURITY EVIDENCED HEREBY IN AN OFFSHORE TRANSACTION, (2) AGREES THAT IT WILL NOT PRIOR TO THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE
144(K) UNDER THE SECURITIES ACT (OR ANY SUCCESSOR PROVISION), RESELL OR OTHERWISE TRANSFER THE SECURITY EVIDENCED HEREBY EXCEPT (A) TO McKESSON CORPORATION (THE "ISSUER") OR ANY SUBSIDIARY THEREOF, (B) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, (C) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (D) TO AN INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH TRANSFER, FURNISHES TO THE TRUSTEE FOR THE SECURITIES A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THE SECURITY EVIDENCED HEREBY (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM SUCH TRUSTEE), (E) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT OR (F) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE SECURITY EVIDENCED HEREBY IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THE SECURITY EVIDENCED HEREBY PRIOR TO THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT (OR ANY SUCCESSOR PROVISION), THE HOLDER MUST CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO THE TRUSTEE FOR THE SECURITIES. IF THE PROPOSED TRANSFEREE

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IS AN INSTITUTIONAL ACCREDITED INVESTOR OR A PURCHASER WHO IS NOT A U.S. PERSON, THE HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE TRUSTEE FOR THE SECURITIES, SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS THE ISSUER OR THE TRUSTEE MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. THIS LEGEND WILL BE REMOVED AFTER THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT. AS USED HEREIN, THE TERMS "OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT.]

McKesson Corporation, a Delaware corporation (the "Issuer," which term includes any successor corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to, _____________________________, the principal sum of _________________________ Dollars ($______) on March 1, 2000 and to pay interest on said principal sum from March 1, 1997, or from the most recent interest payment date to which interest has been paid or duly provided for, semiannually in arrears on March 1 and September 1 (each such date, an "Interest Payment Date") of each year commencing on September 1, 1997, at the rate of 6.60% per annum until the principal hereof shall have become due and payable.

The amount of interest payable on any Interest Payment Date shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed, will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which the principal or interest payable on this Note due 2000 is not a Business Day, then payment of principal or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of such delay). The interest installment so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture (referred to on the reverse hereof) be paid to the person in whose name this Note due 2000 is registered at the close of business on the record date for such interest installment, which shall be the close of business on the immediately preceding February 15 and August 15 prior to such Interest Payment Date, as applicable. Any such interest installment not punctually paid or duly provided for shall forthwith cease to be payable

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to the registered holders on such record date and may be paid to the person in whose name this Note due 2000 is registered at the close of business on a subsequent record date (which shall be not less than five Business Days prior to the date of payment of such defaulted interest), notice whereof shall be given by mail by or on behalf of the Issuer to the registered holders of Notes due 2000 not less than 15 days preceding such subsequent record date, all as more fully provided in the Indenture. The principal of and the interest on this Note due 2000 shall be payable at the office or agency of the Issuer maintained for that purpose in any coin or currency of the United States of America that at the time of payment is legal tender for payment of public and private debts; provided, however, that payment of interest may be made at the option of the Issuer by check mailed to the person entitled thereto at such address as shall appear in the registry books of the Issuer; provided, further that for so long as this Note due 2000 is represented by a Registered Global Security, payment of principal, premium, if any, or interest on this Note due 2000 may be made by wire transfer to the account of the Depositary or its nominee.

Unless the certificate of authentication hereon has been executed by or on behalf of the Trustee (as defined below) under the Indenture, by the manual signature of one of its authorized officers, this Note due 2000 shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

Capitalized terms used in this Note due 2000 which are defined in the Indenture shall have the respective meanings assigned to them in the Indenture.

The provisions of this Note due 2000 are continued on the reverse side hereof and such continued provisions shall for all purposes have the same effect as though fully set forth at this place.

[FORM OF REVERSE SIDE OF NOTE]

This Note due 2000 is one of a duly authorized series of securities (the "Securities") of the Issuer designated as its 6.60% Notes due March 1, 2000 (the "Notes due 2000"). The Securities are all issued or to be issued under and pursuant to an Indenture, dated as of March 11, 1997 (the "Indenture"), duly executed and delivered between the Issuer and The First National Bank of Chicago, a national banking association (the "Trustee," which term includes any successor Trustee with respect to the Securities under the Indenture), to which the Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights thereunder of the Issuer, the Trustee and the holders of the Securities and the terms upon which the Notes due 2000 are to be authenticated and

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delivered. The terms of individual series of Securities may vary with respect to interest rate or interest rate formulas, issue dates, maturity, redemption, repayment, currency of payment and otherwise.

This Note due 2000 is not redeemable and is not entitled to the benefit of a sinking fund or any analogous provision.

If an Event of Default with respect to the Notes due 2000 shall occur and be continuing, the principal of all the Notes due 2000 may be declared due and payable in the manner and with the effect provided in the Indenture.

The Indenture contains provisions permitting the Issuer and the Trustee, with the consent of the holders of not less than a majority in aggregate principal amount of the Securities of all series issued under such Indenture then outstanding and affected (voting as one class) to add any provisions to, or change in any manner or eliminate any of the provisions of, such Indenture or modify in any manner the rights of the holders of the Securities of each series or Coupons so affected; provided that the Issuer and the Trustee may not, without the consent of the holder of each Outstanding Note due 2000 affected thereby, (i) extend the final maturity of the principal of any Security or reduce the principal amount thereof or reduce the rate or extend the time of payment of interest thereon, or reduce any amount payable on redemption thereof or make the principal thereof (including any amount in respect of original issue discount), or interest thereon payable in any coin or currency other than that provided in the Securities or Coupons or in accordance with the terms thereof, or reduce the amount of principal of an Original Issue Discount Security that would be due and payable upon an acceleration of the maturity thereof or the amount thereof provable in bankruptcy or alter certain provisions of the Indenture relating to Securities not denominated in Dollars or the Judgment Currency of such Securities or impair or affect the right of any Securityholder to institute suit for the enforcement of any payment thereof when due or, if the Securities provide therefor, any right of repayment at the option of the Securityholder or (ii) reduce the aforesaid percentage in principal amount of Securities of any series issued under such Indenture, the consent of the holders of which is required for any such modification. It is also provided in the Indenture that, with respect to certain defaults or Events of Default regarding the Securities of any series, the holders of a majority in aggregate principal amount Outstanding of the Securities of each such series, each such series voting as a separate class (or, of all Securities, as the case may be voting as a single class) may under certain circumstances waive all defaults with respect to each such series (or with respect to all the Securities, as the case may be) and rescind and annul a declaration of default and its consequences,

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but no such waiver or rescission and annulment shall extend to or affect any subsequent default or shall impair any right consequent thereto. The preceding sentence shall not, however, apply to a default in the payment of the principal of or interest on any of the Securities.

No reference herein to the Indenture and no provision of this Note due 2000 or of the Indenture shall alter or impair the obligation of the Issuer, which is absolute and unconditional, to pay the principal of and interest on this Note due 2000 at the time, place and rate, and in the coin or currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Note due 2000 may be registered on the registry books of the Issuer, upon surrender of this Note due 2000 for registration of transfer at the office or agency of the Issuer maintained by the Issuer for such purpose in the Borough of Manhattan, The City of New York, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Issuer and the Trustee duly executed by, the holder hereof or by its attorney duly authorized in writing, and thereupon one or more new Notes due 2000 of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Notes due 2000 are issuable only in registered form in minimum denominations of $100,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, the Notes due 2000 are exchangeable for a like aggregate principal amount of Notes due 2000 as requested by the holder surrendering the same.

No service charge shall be made for any such registration of transfer or exchange, but the Issuer may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection therewith.

Prior to due presentment of this Note due 2000 for registration of transfer, the Issuer, the Trustee and any agent of the Issuer or the Trustee may treat the person in whose name this Note due 2000 is registered as the owner hereof for all purposes, whether or not this Note due 2000 be overdue, and neither the Issuer, the Trustee nor any such agent shall be affected by notice to the contrary.

THE INDENTURE AND THIS NOTE DUE 2000 SHALL BE DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCOR-

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DANCE WITH THE LAWS OF SUCH STATE, WITHOUT REGARD TO THE CONFLICTS OF LAW PRINCIPLES THEREOF.

IN WITNESS WHEREOF, the Issuer has caused this instrument to be duly executed, manually or in facsimile, and in imprint or facsimile of its corporate seal to be imprinted hereon.

McKESSON CORPORATION

By:

Nancy A. Miller Vice President and Corporate Secretary

Attest:

By: ____________________
Name:
Title:

CERTIFICATE OF AUTHENTICATION
This is one of the Securities
referred to in the within-mentioned
Indenture.

THE FIRST NATIONAL BANK OF CHICAGO
as Trustee

By: _____________________
Authorized Officer

Dated: ___________________

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ASSIGNMENT

[FORM OF ASSIGNMENT FOR NOTES
THAT ARE NOT GLOBAL SECURITIES]

For value received _____________________ hereby sell(s), assign(s) and transfer(s) unto _____________________________________________________________ (Please insert social security or other taxpayer identification number of assignee.)

the within Note due 2000 and hereby irrevocably constitutes and appoints ________ attorney to transfer the said Note due 2000 on the books of the Issuer, with full power of substitution in the premises.

In connection with any transfer of the within Note due 2000 occurring prior to the Transfer Restriction Termination Date, the undersigned confirms that such Note due 2000 is being transferred:

__ To McKesson Corporation or a subsidiary thereof; or

__ Pursuant to and in compliance with Rule 144A under the Securities Act of 1933, as amended; or

__ To an Institutional Accredited Investor pursuant to and in compliance with the Securities Act of 1933, as amended; or

__ Pursuant to and in compliance with Regulation S under the Securities Act of 1933, as amended; or

__ Pursuant to and in compliance with Rule 144 under the Securities Act of 1933, as amended; or

__ Pursuant to an effective registration statement.


and unless the box below is checked, the undersigned confirms that such Note is not being transferred to an "affiliate" of the Issuer as defined in Rule 144 under the Securities Act of 1933, as amended (an "Affiliate"):

__ The transferee is an Affiliate of the Issuer.

Dated: ____________________________



Signature(s)


Signature Guarantee/1/

NOTICE: The above signature(s) of the holder(s) hereof must correspond with the name(s) written on the face of this Note due 2000 in every particular without alteration or enlargement or any change whatsoever.


/1/ (Signature must be guaranteed by an "eligible guarantor institution," that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Securities Transfer Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)

[FORM OF SCHEDULE FOR ENDORSEMENTS ON GLOBAL SECURITIES
TO REFLECT CHANGES IN PRINCIPAL AMOUNT]

Schedule A

Changes to Principal Amount of Global Securities

              Principal Amount
             of Notes due 2000
            by which this Global
             Security is to be           Remaining
           Reduced or Increased,        Principal
              and Reason for          Amount of this
  Date     Reduction or Increase     Global Security   Notation Made By
---------  ---------------------     ---------------   ----------------

                                                                        ANNEX B

Pursuant to Section 2.3 of the Indenture, dated as of March 11, 1997 (the "Indenture"), between McKesson Corporation (the "Issuer") and The First National Bank of Chicago, a national banking association, as trustee (the "Trustee"), the terms of a series of securities to be issued pursuant to the Indenture are as follows:

1. Designation. The designation of the securities is "6-7/8% Notes due March 1, 2002" (the "Notes due 2002").

2. Aggregate Principal Amount. The Notes due 2002 shall be limited in aggregate principal amount to $175,000,000 (except for Notes due 2002 authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Notes due 2002 pursuant to Section 2.8, 2.9, 2.11, 8.5 or 12.3 of the Indenture).

3. Currency Denomination. The Notes due 2002 shall be denominated

in Dollars.

4. Maturity. The date on which the principal of the Notes due 2002 is payable is March 1, 2002.

5. Rate of Interest; Interest Payment Date; Regular Record Dates.
Each Note due 2002 shall bear interest from March 1, 1997 at 6- 7/8% per annum until the principal thereof is paid. Such interest shall be payable semiannually in arrears on March 1 and September 1 of each year, commencing on September 1, 1997, to the persons in whose names the Notes due 2002 are registered at the close of business on the immediately preceding February 15 and August 15, respectively. Interest on the Notes due 2002 shall accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of original issuance. Interest on the Notes due 2002 shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which principal, premium, if any, or interest is payable on the Notes due 2002 is not a Business Day, then payment of the principal, premium, if any, or interest payable

on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of any such delay).

6. Place of Payment. Principal of, premium, if any, and interest on the Notes due 2002 shall be payable, and the transfer of Notes due 2002 shall be registrable, at the office or agency of the Issuer to be maintained for such purpose in the Borough of Manhattan, The City of New York, except that, at the option of the Issuer, interest may be paid by mailing a check to the address of the person entitled thereto as it appears on the Notes due 2002 register; provided, however, that while any Notes due 2002 are represented by a Registered Global Security, payment of principal of, premium, if any, or interest on the Notes due 2002 may be made by wire transfer to the account of the Depositary or its nominee.

7. Optional Redemption. The Notes due 2002 are not optionally redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

8. Mandatory Redemption. The Notes due 2002 are not mandatorily redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

9. Denominations. The Notes due 2002 shall be issued initially in minimum denominations of $100,000 and shall be issued in integral multiples of $1,000 in excess thereof.

10. Amount Payable Upon Acceleration. The principal of the Notes due 2002 shall be payable upon declaration of acceleration pursuant to Section 5.1 of the Indenture.

11. Payment Currency. Principal and interest on the Notes due 2002 shall be payable in Dollars.

12. Payment Currency - Election. The principal of and interest on the Notes due 2002 shall not be payable in a currency other than Dollars.

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13. Payment Currency - Index. The principal of and interest on the Notes due 2002 shall not be determined with reference to an index based on a coin or currency.

14. Registered Securities. The Notes due 2002 shall be issuable as Registered Securities. The Notes due 2002 may be issued as Registered Global Securities.

15. Additional Amounts. The Issuer shall not pay additional amounts on the Notes due 2002 held by a Person that is not a U.S. Person in respect of taxes or similar charges withheld or deducted.

16. Definitive Certificates. Section 2.8 of the Indenture will govern the transferability of Notes due 2002 in definitive form.

17. Registrar; Paying Agent; Depositary. The Trustee shall initially serve as the registrar and the paying agent for the Notes due 2002. The Depository Trust Company shall initially serve as the Depositary for the Registered Global Security representing Notes due 2002.

18. Events of Default; Covenants. There shall be no deletions from, modifications or additions to the Events of Default set forth in
Section 5.1 of the Indenture with respect to the Notes due 2002. There shall be the following additions to the covenants of the Issuer set forth in Article III with respect to the Notes due 2002:

Limitation on Liens. The Issuer covenants that, so long as any of the Notes due 2002 remain outstanding, it shall not, nor shall it permit any Consolidated Subsidiary to, create or assume any Indebtedness for money borrowed which is secured by a mortgage, pledge, security interest or lien ("liens") of or upon any assets, whether now owned or hereafter acquired, of the Issuer or any such Consolidated Subsidiary without equally and ratably securing the Notes due 2002 by a lien ranking ratably with and equal to (or at the option of the Issuer, senior to) such secured Indebtedness, except that the foregoing restriction shall not apply to (a) liens on any assets of any corporation existing at the time such corporation becomes a Consolidated Subsidiary; (b) liens on any assets existing at the time of acquisition of such assets by the Issuer or a Consoli-

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dated Subsidiary, or liens to secure the payment of all or any part of the purchase price of such assets upon the acquisition of such assets by the Issuer or a Consolidated Subsidiary or to secure any indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary prior to, at the time of, or within 360 days after such acquisition (or in the case of real property, the completion of construction (including any improvements on an existing asset) or commencement of full operation of such asset, whichever is later) which indebtedness is incurred or guaranteed for the purpose of financing all or any part of the purchase price thereof or, in the case of real property, construction or improvements thereon; provided, however, that in the case of any such acquisition, construction or improvement, the lien shall not apply to any assets theretofore owned by the Issuer or a Consolidated Subsidiary, other than, in the case of any such construction or improvement, any real property on which the property so constructed, or the improvement, is located, or to secure the payment of the purchase price of such assets, or to secure indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary for the purpose of financing the purchase price of such assets or improvements or construction thereon, which indebtedness is incurred or guaranteed prior to, at the time of or within 360 days after such acquisition (or in the case of real property, completion of such improvement or construction or commencement of full operation of such property, whichever is later); (c) liens on any assets securing indebtedness owed by any Consolidated Subsidiary to the Issuer or another wholly owned Subsidiary; (d) liens on any assets of a corporation existing at the time such corporation is merged into or consolidated with the Issuer or a Subsidiary or at the time of a purchase, lease or other acquisition of the assets of a corporation or firm as an entirety or substantially as an entirety by the Issuer or a Subsidiary; (e) liens on any assets of the Issuer or a Consolidated Subsidiary in favor of the United States of America or any state thereof, or any department, agency or instrumentality or political subdivision of the United States of America or any State thereof, or in favor of any other country, or any political subdivision thereof, to secure partial, progress, advance or other payments pursuant to any contract or statute or to secure any indebtedness incurred or guaranteed for the purpose of financing all or any part of the purchase price (or, in the case of real property, the cost

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of construction) of the assets subject to such liens (including, but not limited to, liens incurred in connection with pollution control, industrial revenue or similar financing); (f) any extension, renewal or replacement (or successive extensions, renewals or replacements), in whole or in part, of any lien referred to in the foregoing clauses (a) to (e), inclusive; provided, however, that the principal amount of indebtedness secured thereby shall not exceed the principal amount of indebtedness so secured at the time of such extension, renewal or replacement, and that such extension, renewal or replacement shall be limited to all or a part of the assets which secured the lien so extended, renewed or replaced (plus improvements and construction on such real property); (g) liens imposed by law, such as mechanics', workmen's, repairmen's, materialmen's, carriers', warehousemen's, vendors' or other similar liens arising in the ordinary course of business, or governmental (federal, state or municipal) liens arising out of contracts for the sale of products or services by the Issuer or any Consolidated Subsidiary, or deposits or pledges to obtain the release of any of the foregoing liens; (h) pledges, liens or deposits under worker's compensation laws or similar legislation and liens or judgments thereunder which are not currently dischargeable, or in connection with bids, tenders, contracts (other than for the payment of money) or leases to which the Issuer or any Consolidated Subsidiary is a party, or to secure public or statutory obligations of the Issuer or any Consolidated Subsidiary, or in connection with obtaining or maintaining self- insurance or to obtain the benefits of any law, regulation or arrangement pertaining to unemployment insurance, old age pensions, social security or similar matters, or to secure surety, appeal or customs bonds to which the Issuer or any Consolidated Subsidiary is a party, or in litigation or other proceedings such as, but not limited to, interpleader proceedings, and other similar pledges, liens or deposits made or incurred in the ordinary course of business; (i) liens created by or resulting from any litigation or other proceeding which is being contested in good faith by appropriate proceedings, including liens arising out of judgements or awards against the Issuer or any Consolidated Subsidiary with respect to which the Issuer or such Consolidated Subsidiary is in good faith prosecuting an appeal or proceedings for review or for which the time to make an appeal has not yet expired; or final unappealable judgment liens

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which are satisfied within 15 days of the date of judgment; or liens incurred by the Issuer or any Consolidated Subsidiary for the purpose of obtaining a stay or discharge in the course of any litigation or other proceeding to which the Issuer or such Consolidated Subsidiary is a party; or (j) liens for taxes or assessments or governmental charges or levies not yet due or delinquent, or which can thereafter be paid without penalty, or which are being contested in good faith by appropriate proceedings; landlord's liens on property held under lease; and any other liens or charges incidental to the conduct of the business of the Issuer or any Consolidated Subsidiary or the ownership of the assets of any of them which were not incurred in connection with the borrowing of money or the obtaining of advances or credit and which do not, in the opinion of the Issuer, materially impair the use of such assets in the operation of the business of the Issuer or such Consolidated Subsidiary or the value of such assets for the purposes thereof. Notwithstanding the above, the Issuer or any Consolidated Subsidiary may, without securing the Notes due 2002, create or assume any Indebtedness which is secured by a lien which would otherwise be subject to the foregoing restrictions, provided that at the time of such creation or assumption, after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

Limitation on Sale and Lease-Back Transactions. The Issuer covenants that, so long as any of the Notes due 2002 remain outstanding, it will not, nor shall it permit any Consolidated Subsidiary to, enter into any sale and lease-back transactions with respect to any assets, other than any sale leaseback transaction (involving a lease for a term of not more than three years), unless either (a) the Issuer or such Consolidated Subsidiary would be entitled to incur Indebtedness secured by a lien on the assets to be leased in an amount at least equal to the Attributable Debt in respect of such transaction without equally and ratably securing the Notes due 2002 pursuant to clauses (a) through (j) inclusive of the covenant with respect to "Limitation on Liens" above, or (b) the proceeds of the sale of the assets to be leased are at least equal to their fair market value (as determined by the Board of Directors of the Issuer) and the proceeds are applied to the purchase or

6

acquisition (or, in the case of real property, the construction) of assets or to the retirement (other than at maturity or pursuant to a mandatory sinking fund or mandatory redemption provision) of indebtedness. The foregoing limitation shall not apply, if at the time the Issuer or any Consolidated Subsidiary enters into such sale and lease-back transaction, and after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

The term "Attributable Debt" in connection with a sale and lease- back transaction shall mean, as of the date of determination, the lesser of (a) the fair value of the assets subject to such transaction or (b) the present value (discounted at the rate of interest set forth in or implicit in the terms of such lease or, if it is not practicable to determine such rate, the weighted average interest rate per annum borne by all series of Securities then Outstanding and subject to the Limitation Sale and Leaseback Transactions and compounded semiannually, in either case as determined by the principal accounting or financial officer of the Issuer) of the obligations of the Issuer or any Consolidated Subsidiary for net rental payments during the remaining term of all leases (including any period for which such lease has been extended or may, at the option of the lessor, be extended). The term "net rental payments" under any lease of any period shall mean the sum of the rental and other payments required to be paid in such period by the lessee thereunder, not including, however, any amounts required to be paid by such lessee (whether or not designated as rental or additional rental) on account of maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges required to be paid by such lessee thereunder or any amounts required to be paid by such lessee thereunder contingent upon the amount of sales, maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges. The term "Consolidated Subsidiary" shall mean any Subsidiary substantially all the property of which is located, and substantially all the operations of which are conducted, in the United States of America whose financial statements are consolidated with those of the Issuer in accordance with generally accepted accounting principles. The term "Exempted Debt" shall mean the sum of the

7

following as of the date of determination: (i) Indebtedness of the Issuer and its Consolidated Subsidiaries incurred after the date of the Indenture and secured by liens not permitted to be created or assumed pursuant to the covenant with respect to "Limitation on Liens" above, and (ii) Attributable Debt of the Issuer and its Consolidated Subsidiaries in respect of every sale and lease-back transaction entered into after the date of the Indenture, other than leases expressly permitted by the covenant with respect to "Limitation on Sale and Lease-Back Transactions" above. The term "Indebtedness" shall mean all items classified as indebtedness on the most recently available consolidated balance sheet of the Issuer and its Consolidated Subsidiaries, in accordance with generally accepted accounting principles.

19. Conversion and Exchange. The Notes due 2002 shall not be convertible for or exchangeable into any other security; provided that this provision shall not limit the Issuer's ability to consummate an exchange offer as contemplated by the Registration Rights Agreement, dated as of March 11, 1997, by and among the Issuer, Morgan Stanley & Co. Incorporated, BancAmerica Securities, Inc., Chase Securities Inc. and J.P. Morgan Securities Inc.

20. Other Terms. The Notes due 2002 shall have the other terms and shall be substantially in the form set forth in the form of Notes due 2002 attached hereto as Exhibit A. In case of any conflict between this Annex B and the Notes due 2002 in the form attached hereto as Exhibit A, the form of the Notes due 2002 shall control.

Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Indenture.

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EXHIBIT A

[FORM OF FACE OF NOTE DUE MARCH 1, 2002]

[IF THE NOTE DUE 2002 IS TO BE A GLOBAL SECURITY, INSERT THE FOLLOWING

- - THIS NOTE DUE 2002 IS A BOOK-ENTRY SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A DEPOSITARY. THIS NOTE DUE 2002 IS EXCHANGEABLE FOR NOTES DUE 2002 REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS NOTE DUE 2002 (OTHER THAN A TRANSFER OF THIS NOTE DUE 2002 AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY) MAY BE REGISTERED EXCEPT IN SUCH LIMITED CIRCUMSTANCES.

UNLESS THIS NOTE DUE 2002 IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY NOTE DUE 2002 ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT HEREON IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

No. __________ CUSIP NO. ________

MCKESSON CORPORATION

6-7/8% NOTE DUE MARCH 1, 2002

[PRIOR TO THE TRANSFER RESTRICTION TERMINATION DATE, ANY CERTIFICATE EVIDENCING A NOTE DUE 2002 SHALL BEAR A LEGEND IN SUBSTANTIALLY THE FOLLOWING FORM, UNLESS OTHERWISE AGREED BY THE ISSUER (WITH WRITTEN NOTICE THEREOF TO THE


TRUSTEE): THE SECURITY EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) OR (B) IT IS AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(A)(1), (2),
(3) OR (7) UNDER THE SECURITIES ACT) ("INSTITUTIONAL ACCREDITED INVESTOR") OR
(C) IT IS NOT A U.S. PERSON AND IS ACQUIRING THE SECURITY EVIDENCED HEREBY IN AN OFFSHORE TRANSACTION, (2) AGREES THAT IT WILL NOT PRIOR TO THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE
144(K) UNDER THE SECURITIES ACT (OR ANY SUCCESSOR PROVISION), RESELL OR OTHERWISE TRANSFER THE SECURITY EVIDENCED HEREBY EXCEPT (A) TO McKESSON CORPORATION (THE "ISSUER") OR ANY SUBSIDIARY THEREOF, (B) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, (C) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (D) TO AN INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH TRANSFER, FURNISHES TO THE TRUSTEE FOR THE SECURITIES A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THE SECURITY EVIDENCED HEREBY (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM SUCH TRUSTEE), (E) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT OR (F) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE SECURITY EVIDENCED HEREBY IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THE SECURITY EVIDENCED HEREBY PRIOR TO THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT (OR ANY SUCCESSOR PROVISION), THE HOLDER MUST CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO THE TRUSTEE FOR THE SECURITIES. IF THE PROPOSED TRANSFEREE

2

IS AN INSTITUTIONAL ACCREDITED INVESTOR OR A PURCHASER WHO IS NOT A U.S. PERSON, THE HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE TRUSTEE FOR THE SECURITIES, SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS THE ISSUER OR THE TRUSTEE MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. THIS LEGEND WILL BE REMOVED AFTER THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT. AS USED HEREIN, THE TERMS "OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT.]

McKesson Corporation, a Delaware corporation (the "Issuer," which term includes any successor corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to, ______________________________, the principal sum of _________________________ Dollars ($______) on March 1, 2002 and to pay interest on said principal sum from March 1, 1997, or from the most recent interest payment date to which interest has been paid or duly provided for, semiannually in arrears on March 1 and September 1 (each such date, an "Interest Payment Date") of each year commencing on September 1, 1997, at the rate of 6-7/8% per annum until the principal hereof shall have become due and payable.

The amount of interest payable on any Interest Payment Date shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed, will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which the principal or interest payable on this Note due 2002 is not a Business Day, then payment of principal or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of such delay). The interest installment so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture (referred to on the reverse hereof) be paid to the person in whose name this Note due 2002 is registered at the close of business on the record date for such interest installment, which shall be the close of business on the immediately preceding February 15 and August 15 prior to such Interest Payment Date, as applicable. Any such interest installment not punctually paid or duly provided for shall forthwith cease to be payable

3

to the registered holders on such record date and may be paid to the person in whose name this Note due 2002 is registered at the close of business on a subsequent record date (which shall be not less than five Business Days prior to the date of payment of such defaulted interest), notice whereof shall be given by mail by or on behalf of the Issuer to the registered holders of Notes due 2002 not less than 15 days preceding such subsequent record date, all as more fully provided in the Indenture. The principal of and the interest on this Note due 2002 shall be payable at the office or agency of the Issuer maintained for that purpose in any coin or currency of the United States of America that at the time of payment is legal tender for payment of public and private debts; provided, however, that payment of interest may be made at the option of the Issuer by check mailed to the person entitled thereto at such address as shall appear in the registry books of the Issuer; provided, further that for so long as this Note due 2002 is represented by a Registered Global Security, payment of principal, premium, if any, or interest on this Note due 2002 may be made by wire transfer to the account of the Depositary or its nominee.

Unless the certificate of authentication hereon has been executed by or on behalf of the Trustee (as defined below) under the Indenture, by the manual signature of one of its authorized officers, this Note due 2002 shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

Capitalized terms used in this Note due 2002 which are defined in the Indenture shall have the respective meanings assigned to them in the Indenture.

The provisions of this Note due 2002 are continued on the reverse side hereof and such continued provisions shall for all purposes have the same effect as though fully set forth at this place.

[FORM OF REVERSE SIDE OF NOTE]

This Note due 2002 is one of a duly authorized series of securities (the "Securities") of the Issuer designated as its 6-7/8% Notes due March 1, 2002 (the "Notes due 2002"). The Securities are all issued or to be issued under and pursuant to an Indenture, dated as of March 11, 1997 (the "Indenture"), duly executed and delivered between the Issuer and The First National Bank of Chicago, a national banking association (the "Trustee," which term includes any successor Trustee with respect to the Securities under the Indenture), to which the Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights thereunder of the Issuer, the Trustee and the holders of the Securities and the terms upon which the Notes due 2002 are to be authenticated and

4

delivered. The terms of individual series of Securities may vary with respect to interest rate or interest rate formulas, issue dates, maturity, redemption, repayment, currency of payment and otherwise.

This Note due 2002 is not redeemable and is not entitled to the benefit of a sinking fund or any analogous provision.

If an Event of Default with respect to the Notes due 2002 shall occur and be continuing, the principal of all the Notes due 2002 may be declared due and payable in the manner and with the effect provided in the Indenture.

The Indenture contains provisions permitting the Issuer and the Trustee, with the consent of the holders of not less than a majority in aggregate principal amount of the Securities of all series issued under such Indenture then outstanding and affected (voting as one class) to add any provisions to, or change in any manner or eliminate any of the provisions of, such Indenture or modify in any manner the rights of the holders of the Securities of each series or Coupons so affected; provided that the Issuer and the Trustee may not, without the consent of the holder of each Outstanding Note due 2002 affected thereby, (i) extend the final maturity of the principal of any Security or reduce the principal amount thereof or reduce the rate or extend the time of payment of interest thereon, or reduce any amount payable on redemption thereof or make the principal thereof (including any amount in respect of original issue discount), or interest thereon payable in any coin or currency other than that provided in the Securities or Coupons or in accordance with the terms thereof, or reduce the amount of principal of an Original Issue Discount Security that would be due and payable upon an acceleration of the maturity thereof or the amount thereof provable in bankruptcy or alter certain provisions of the Indenture relating to Securities not denominated in Dollars or the Judgment Currency of such Securities or impair or affect the right of any Securityholder to institute suit for the enforcement of any payment thereof when due or, if the Securities provide therefor, any right of repayment at the option of the Securityholder or (ii) reduce the aforesaid percentage in principal amount of Securities of any series issued under such Indenture, the consent of the holders of which is required for any such modification. It is also provided in the Indenture that, with respect to certain defaults or Events of Default regarding the Securities of any series, the holders of a majority in aggregate principal amount Outstanding of the Securities of each such series, each such series voting as a separate class (or, of all Securities, as the case may be voting as a single class) may under certain circumstances waive all defaults with respect to each such series (or with respect to all the Securities, as the case may be) and rescind and annul a declaration of default and its consequences,

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but no such waiver or rescission and annulment shall extend to or affect any subsequent default or shall impair any right consequent thereto. The preceding sentence shall not, however, apply to a default in the payment of the principal of or interest on any of the Securities.

No reference herein to the Indenture and no provision of this Note due 2002 or of the Indenture shall alter or impair the obligation of the Issuer, which is absolute and unconditional, to pay the principal of and interest on this Note due 2002 at the time, place and rate, and in the coin or currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Note due 2002 may be registered on the registry books of the Issuer, upon surrender of this Note due 2002 for registration of transfer at the office or agency of the Issuer maintained by the Issuer for such purpose in the Borough of Manhattan, The City of New York, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Issuer and the Trustee duly executed by, the holder hereof or by its attorney duly authorized in writing, and thereupon one or more new Notes due 2002 of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Notes due 2002 are issuable only in registered form in minimum denominations of $100,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, the Notes due 2002 are exchangeable for a like aggregate principal amount of Notes due 2002 as requested by the holder surrendering the same.

No service charge shall be made for any such registration of transfer or exchange, but the Issuer may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection therewith.

Prior to due presentment of this Note due 2002 for registration of transfer, the Issuer, the Trustee and any agent of the Issuer or the Trustee may treat the person in whose name this Note due 2002 is registered as the owner hereof for all purposes, whether or not this Note due 2002 be overdue, and neither the Issuer, the Trustee nor any such agent shall be affected by notice to the contrary.

THE INDENTURE AND THIS NOTE DUE 2002 SHALL BE DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCOR-

6

DANCE WITH THE LAWS OF SUCH STATE, WITHOUT REGARD TO THE CONFLICTS OF LAW PRINCIPLES THEREOF.

7

IN WITNESS WHEREOF, the Issuer has caused this instrument to be duly executed, manually or in facsimile, and in imprint or facsimile of its corporate seal to be imprinted hereon.

McKESSON CORPORATION

By:

Nancy A. Miller Vice President and Corporate Secretary

Attest:

By: ____________________
Name:
Title:

CERTIFICATE OF AUTHENTICATION
This is one of the Securities
referred to in the within-mentioned
Indenture.

THE FIRST NATIONAL BANK OF CHICAGO
as Trustee

By: _____________________
Authorized Officer

Dated: ___________________


ASSIGNMENT

[FORM OF ASSIGNMENT FOR NOTES
THAT ARE NOT GLOBAL SECURITIES]

For value received _____________________ hereby sell(s), assign(s) and transfer(s) unto _____________________________________________________________ (Please insert social security or other taxpayer identification number of assignee.)

the within Note due 2002 and hereby irrevocably constitutes and appoints ________ attorney to transfer the said Note due 2002 on the books of the Issuer, with full power of substitution in the premises.

In connection with any transfer of the within Note due 2002 occurring prior to the Transfer Restriction Termination Date, the undersigned confirms that such Note due 2002 is being transferred:

__ To McKesson Corporation or a subsidiary thereof; or

__ Pursuant to and in compliance with Rule 144A under the Securities Act of 1933, as amended; or

__ To an Institutional Accredited Investor pursuant to and in compliance with the Securities Act of 1933, as amended; or

__ Pursuant to and in compliance with Regulation S under the Securities Act of 1933, as amended; or

__ Pursuant to and in compliance with Rule 144 under the Securities Act of 1933, as amended; or

__ Pursuant to an effective registration statement.


and unless the box below is checked, the undersigned confirms that such Note is not being transferred to an "affiliate" of the Issuer as defined in Rule 144 under the Securities Act of 1933, as amended (an "Affiliate"):

__ The transferee is an Affiliate of the Issuer.

Dated: ____________________________



Signature(s)


Signature Guarantee/1/

NOTICE: The above signature(s) of the holder(s) hereof must correspond with the name(s) written on the face of this Note due 2002 in every particular without alteration or enlargement or any change whatsoever.


/1/ (Signature must be guaranteed by an "eligible guarantor institution," that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Securities Transfer Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)

[FORM OF SCHEDULE FOR ENDORSEMENTS ON GLOBAL SECURITIES
TO REFLECT CHANGES IN PRINCIPAL AMOUNT]

Schedule A

Changes to Principal Amount of Global Securities

             Principal Amount
            of Notes due 2002
           by which this Global
            Security is to be         Remaining
          Reduced or Increased,       Principal
              and Reason for       Amount of this
  Date     Reduction or Increase  Global Security   Notation Made By
---------  ---------------------  ---------------   ----------------

                                                                        ANNEX C

Pursuant to Section 2.3 of the Indenture, dated as of March 11, 1997 (the "Indenture"), between McKesson Corporation (the "Issuer") and The First National Bank of Chicago, a national banking association, as trustee (the "Trustee"), the terms of a series of securities to be issued pursuant to the Indenture are as follows:

1. Designation. The designation of the securities is "7.65% Debentures due March 1, 2027" (the "Debentures due 2027").

2. Aggregate Principal Amount. The Debentures due 2027 shall be limited in aggregate principal amount to $175,000,000 (except for Debentures due 2027 authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Debentures due 2027 pursuant to Section 2.8, 2.9, 2.11, 8.5 or 12.3 of the Indenture).

3. Currency Denomination. The Debentures due 2027 shall be denominated in Dollars.

4. Maturity. The date on which the principal of the Debentures due 2027 is payable is March 1, 2027.

5. Rate of Interest; Interest Payment Date; Regular Record Dates.
Each Debenture due 2027 shall bear interest from March 1, 1997 at 7.65% per annum until the principal thereof is paid. Such interest shall be payable semiannually in arrears on March 1 and September 1 of each year, commencing on September 1, 1997, to the persons in whose names the Debentures due 2027 are registered at the close of business on the immediately preceding February 15 and August 15, respectively. Interest on the Debentures due 2027 shall accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of original issuance. Interest on the Debentures due 2027 shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which principal, premium, if any, or interest is payable on the Debentures due 2027 is not a Business Day, then payment of the principal, premium, if any, or interest payable on such date will be made on the next succeeding

day that is a Business Day (and without any interest or other payment in respect of any such delay).

6. Place of Payment. Principal of, premium, if any, and interest on the Debentures due 2027 shall be payable, and the transfer of Debentures due 2027 shall be registrable, at the office or agency of the Issuer to be maintained for such purpose in the Borough of Manhattan, The City of New York, except that, at the option of the Issuer, interest may be paid by mailing a check to the address of the person entitled thereto as it appears on the Debentures due 2027 register; provided, however, that while any Debentures due 2027 are represented by a Registered Global Security, payment of principal of, premium, if any, or interest on the Debentures due 2027 may be made by wire transfer to the account of the Depositary or its nominee.

7. Optional Redemption. The Debentures due 2027 may be redeemed as a whole or in part, at the option of the Issuer, at any time at a redemption price equal to the greater of (i) 100% of their principal amount or (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Yield plus 12.5 basis points, plus accrued interest to the date of redemption. Holders of Debentures due 2027 to be redeemed will receive notice thereof by first-class mail at least 30 and not more than 60 days prior to the date fixed for redemption.

"Treasury Yield" means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date. "Comparable Treasury Issue" means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term of the Debentures due 2027 that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Debentures due 2027. "Independent Investment Banker" means Morgan Stanley & Co.

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Incorporated or, if such firm is unwilling or unable to select the Comparable Treasury Issue, an independent investment banking institution of national standing appointed by the Trustee. "Comparable Treasury Price" means, with respect to any redemption date, (i) the average of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on the third business day preceding such redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal Reserve Bank of New York and designated "Composite 3:30 p.m. Quotations for U.S. Government Securities" or (ii) if such release (or any successor release) is not published or does not contain such prices on such business day, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (B) if the Trustee obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such Quotations. "Reference Treasury Dealer Quotations" means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Trustee, of the bid and asked prices of the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m. on the third business day preceding such redemption date. "Reference Treasury Dealer" means each of Morgan Stanley & Co. Incorporated, BancAmerica Securities, Inc., Chase Securities Inc. and J.P. Morgan Securities Inc., and their respective successors; provided however, that if any of the foregoing shall cease to be a primary U.S. Government Securities dealer in New York City (a "Primary Treasury Dealer"), the Issuer shall substitute therefor another Primary Treasury Dealer.

8. Mandatory Redemption. The Debentures due 2027 are not mandatorily redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

9. Denominations. The Debentures due 2027 shall be issued initially in minimum denominations of $100,000 and shall be issued in integral multiples of $1,000 in excess thereof.

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10. Amount Payable Upon Acceleration. The principal of the Debentures due 2027 shall be payable upon declaration of acceleration pursuant to Section 5.1 of the Indenture.

11. Payment Currency. Principal and interest on the Debentures due 2027 shall be payable in Dollars.

12. Payment Currency - Election. The principal of and interest on the Debentures due 2027 shall not be payable in a currency other than Dollars.

13. Payment Currency - Index. The principal of and interest on the Debentures due 2027 shall not be determined with reference to an index based on a coin or currency.

14. Registered Securities. The Debentures due 2027 shall be issuable as Registered Securities. The Debentures due 2027 may be issued as Registered Global Securities.

15. Additional Amounts. The Issuer shall not pay additional amounts on the Debentures due 2027 held by a Person that is not a U.S. Person in respect of taxes or similar charges withheld or deducted.

16. Definitive Certificates. Section 2.8 of the Indenture will govern the transferability of Debentures due 2027 in definitive form.

17. Registrar; Paying Agent; Depositary. The Trustee shall initially serve as the registrar and the paying agent for the Debentures due 2027. The Depository Trust Company shall initially serve as the Depositary for the Registered Global Securities representing Debentures due 2027.

18. Events of Default; Covenants. There shall be no deletions from, modifications or additions to the Events of Default set forth in
Section 5.1 of the Indenture with respect to the Debentures due 2027. There shall be the following additions to the covenants of the Issuer set forth in Article III with respect to the Debentures due 2027:

Limitation on Liens. The Issuer covenants that, so long as any of the Debentures due 2027 remain outstanding, it shall not, nor shall

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it permit any Consolidated Subsidiary to, create or assume any Indebtedness for money borrowed which is secured by a mortgage, pledge, security interest or lien ("liens") of or upon any assets, whether now owned or hereafter acquired, of the Issuer or any such Consolidated Subsidiary without equal and ratably securing the Debentures due 2027 by a lien ranking ratably with and equalto (or at the option of the Issuer, senior to) such secured Indebtedness, except that the foregoing restriction shall not apply to (a) liens on any assets of any corporation existing at the time such corporation becomes a Consolidated Subsidiary;
(b) liens on any assets existing at the time of acquisition of such assets by the Issuer or a Consolidated Subsidiary, or liens to secure the payment of all or any part of the purchase price of such assets upon the acquisition of such assets by the Issuer or a Consolidated Subsidiary or to secure any indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary prior to, at the time of, or within 360 days after such acquisition (or in the case of real property, the completion of construction (including any improvements on an existing asset) or commencement of full operation of such asset, whichever is later) which indebtedness is incurred or guaranteed for the purpose of financing all or any part of the purchase price thereof or, in the case of real property, construction or improvements thereon; provided, however, that in the case of any such acquisition, construction or improvement, the lien shall not apply to any assets theretofore owned by the Issuer or a Consolidated Subsidiary, other than, in the case of any such construction or improvement, any real property on which the property so constructed, or the improvement, is located, or to secure the payment of the purchase price of such assets, or to secure indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary for the purpose of financing the purchase price of such assets or improvements or construction thereon, which indebtedness is incurred or guaranteed prior to, at the time of or within 360 days after such acquisition (or in the case of real property, completion of such improvement or construction or commencement of full operation of such property, whichever is later); (c) liens on any assets securing indebtedness owed by any Consolidated Subsidiary to the Issuer or another wholly owned Subsidiary; (d) liens on any assets of a corporation existing at the time such corporation is merged into or consolidated with the Issuer or a Subsidiary or at the time of a purchase, lease or other

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acquisition of the assets of a corporation or firm as an entirety or substantially as an entirety by the Issuer or a Subsidiary;
(e) liens on any assets of the Issuer or a Consolidated Subsidiary in favor of the United States of America or any state thereof, or any department, agency or instrumentality or political subdivision of the United States of America or any State thereof, or in favor of any other country, or any political subdivision thereof, to secure partial, progress, advance or other payments pursuant to any contract or statute or to secure any indebtedness incurred or guaranteed for the purpose of financing all or any part of the purchase price (or, in the case of real property, the cost of construction) of the assets subject to such liens (including, but not limited to, liens incurred in connection with pollution control, industrial revenue or similar financing); (f) any extension, renewal or replacement (or successive extensions, renewals or replacements) in whole or in part, of any lien referred to in the foregoing clauses (a) to
(e), inclusive; provided, however, that the principal amount of indebtedness secured thereby shall not exceed the principal amount of indebtedness so secured at the time of such extension, renewal or replacement, and that such extension, renewal or replacement shall be limited to all or a part of the assets which secured the lien so extended, renewed or replaced (plus improvements and construction on such real property); (g) liens imposed by law, such as mechanics', workmen's, repairmen's, materialmen's, carriers', warehousemen's, vendors' or other similar liens arising in the ordinary course of business, or governmental (federal, state or municipal) liens arising out of contracts for the sale of products or services by the Issuer or any Consolidated Subsidiary, or deposits or pledges to obtain the release of any of the foregoing liens; (h) pledges, liens or deposits under worker's compensation laws or similar legislation and liens or judgments thereunder which are not currently dischargeable, or in connection with bids, tenders, contracts (other than for the payment of money) or leases to which the Issuer or any Consolidated Subsidiary is a party, or to secure public or statutory obligations of the Issuer or any Consolidated Subsidiary, or in connection with obtaining or maintaining self- insurance or to obtain the benefits of any law, regulation or arrangement pertaining to unemployment insurance, old age pensions, social security or similar matters, or to secure surety, appeal or customs bonds to which the Issuer or any Consolidated Subsidiary is a party, or in litigation or other proceedings such as,

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but not limited to, interpleader proceedings, and other similar pledges, liens or deposits made or incurred in the ordinary course of business; (i) liens created by or resulting from any litigation or other proceeding which is being contested in good faith by appropriate proceedings, including liens arising out of judgements or awards against the Issuer or any Consolidated Subsidiary with respect to which the Issuer or such Consolidated Subsidiary is in good faith prosecuting an appeal or proceedings for review or for which the time to make an appeal has not yet expired; or final unappealable judgment liens which are satisfied within 15 days of the date of judgment; or liens incurred by the Issuer or any Consolidated Subsidiary for the purpose of obtaining a stay or discharge in the course of any litigation or other proceeding to which the Issuer or such Consolidated Subsidiary is a party; or (j) liens for taxes or assessments or governmental charges or levies not yet due or delinquent, or which can thereafter be paid without penalty, or which are being contested in good faith by appropriate proceedings; landlord's liens on property held under lease; and any other liens or charges incidental to the conduct of the business of the Issuer or any Consolidated Subsidiary or the ownership of the assets of any of them which were not incurred in connection with the borrowing of money or the obtaining of advances or credit and which do not, in the opinion of the Issuer, materially impair the use of such assets in the operation of the business of the Issuer or such Consolidated Subsidiary or the value of such assets for the purposes thereof. Notwithstanding the above, the Issuer or any Consolidated Subsidiary may, without securing the Debentures due 2027, create or assume any Indebtedness which is secured by a lien which would otherwise be subject to the foregoing restrictions, provided that at the time of such creation or assumption, after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

Limitation on Sale and Lease-Back Transactions. The Issuer covenants that, so long as any of the Debentures due 2027 remain outstanding, it will not, nor shall it permit any Consolidated Subsidiary to, enter into any sale and lease-back transactions with respect to any assets, other than any sale leaseback transaction (involving leases for a term of not more than three years), unless

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either (a) the Issuer or such Consolidated Subsidiary would be entitled to incur Indebtedness secured by a lien on the assets to be leased in an amount at least equal to the Attributable Debt in respect of such transaction without equally and ratably securing the Debentures due 2027 pursuant to clauses (a) through (j) inclusive of the covenant with respect to "Limitation on Liens" above, or (b) the proceeds of the sale of the assets to be leased are at least equal to their fair market value (as determined by the Board of Directors of the Issuer) and the proceeds are applied to the purchase or acquisition (or, in the case of real property, the construction) of assets or to the retirement (other than at maturity or pursuant to a mandatory sinking fund or mandatory redemption provision) of indebtedness. The foregoing limitation shall not apply, if at the time the Issuer or any Consolidated Subsidiary enters into such sale and lease-back transaction, and after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

The term "Attributable Debt" in connection with a sale and lease- back transaction shall mean, as of the date of determination, the lesser of (a) the fair value of the assets subject to such transaction or (b) the present value (discounted at the rate of interest set forth in or implicit in the terms of such lease or, if it is not practicable to determine such rate, the weighted average interest rate per annum borne by all series of Securities then Outstanding and subject to the Limitation on Sale and Leaseback Transactions and compounded semiannually, in either case as determined by the principal accounting or financial officer of the Issuer) of the obligations of the Issuer or any Consolidated Subsidiary for net rental payments during the remaining term of all leases (including any period for which such lease has been extended or may, at the option of the lessor, be extended). The term "net rental payments" under any lease of any period shall mean the sum of the rental and other payments required to be paid in such period by the lessee thereunder, not including, however, any amounts required to be paid by such lessee (whether or not designated as rental or additional rental) on account of maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges required to be paid by such lessee thereunder or any amounts required to be paid by such lessee thereunder contingent

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upon the amount of sales, maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges. The term "Consolidated Subsidiary" shall mean any Subsidiary substantially all the property of which is located, and substantially all the operations of which are conducted, in the United States of America whose financial statements are consolidated with those of the Issuer in accordance with generally accepted accounting principles. The term "Exempted Debt" shall mean the sum of the following as of the date of determination: (i) Indebtedness of the Issuer and its Consolidated Subsidiaries incurred after the date of the Indenture and secured by liens not permitted to be created or assumed pursuant to the covenant with respect to "Limitation on Liens" above, and (ii) Attributable Debt of the Issuer and its Consolidated Subsidiaries in respect of every sale and lease-back transaction entered into after the date of the Indenture, other than leases permitted by this covenant with respect to "Limitation on Sale and Lease-Back Transactions" above. The term "Indebtedness" shall mean all items classified as indebtedness on the most recently available consolidated balance sheet of the Issuer and its Consolidated Subsidiaries, in accordance with generally accepted accounting principles.

19. Conversion and Exchange. The Debentures due 2027 shall not by their terms be convertible into or exchangeable for any other security; provided that this provision shall not limit the Issuer's ability to consummate an exchange offer as contemplated by the Registration Rights Agreement, dated as of March 11, 1997, by and among the Issuer, Morgan Stanley & Co. Incorporated, BancAmerica Securities, Inc., Chase Securities Inc. and J.P.

Morgan Securities Inc.

20. Other Terms. The Debentures due 2027 shall have the other terms and shall be substantially in the form set forth in the form of Debentures due 2027 attached hereto as Exhibit A. In case of any conflict between this Annex C and the Debentures due 2027 in the form attached hereto as Exhibit A, the form of the Debentures due 2027 shall control.

Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Indenture.

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EXHIBIT A

[FORM OF FACE OF DEBENTURE DUE MARCH 1, 2027]

[IF THE DEBENTURE DUE 2027 IS TO BE A GLOBAL SECURITY, INSERT THE

FOLLOWING - - THIS DEBENTURE DUE 2027 IS A BOOK-ENTRY SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A DEPOSITARY. THIS DEBENTURE DUE 2027 IS EXCHANGEABLE FOR DEBENTURES DUE 2027 REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS DEBENTURE DUE 2027 (OTHER THAN A TRANSFER OF THIS DEBENTURE DUE 2027) AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY) MAY BE REGISTERED EXCEPT IN SUCH LIMITED CIRCUMSTANCES.

UNLESS THIS DEBENTURE DUE 2027 IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY DEBENTURE DUE 2027 ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT HEREON IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

No. __________ CUSIP NO. ________

MCKESSON CORPORATION

7.65% DEBENTURE DUE MARCH 1, 2027

[PRIOR TO THE TRANSFER RESTRICTION TERMINATION DATE, ANY CERTIFICATE EVIDENCING A DEBENTURE DUE 2027 SHALL BEAR A LEGEND IN SUBSTANTIALLY THE FOLLOWING FORM, UNLESS OTHER-


WISE AGREED BY THE ISSUER (WITH WRITTEN NOTICE THEREOF TO THE TRUSTEE): THE SECURITY EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) OR (B) IT IS AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(A)(1), (2), (3) OR
(7) UNDER THE SECURITIES ACT) ("INSTITUTIONAL ACCREDITED INVESTOR") OR (C) IT IS NOT A U.S. PERSON AND IS ACQUIRING THE SECURITY EVIDENCED HEREBY IN AN OFFSHORE TRANSACTION, (2) AGREES THAT IT WILL NOT PRIOR TO THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT (OR ANY SUCCESSOR PROVISION), RESELL OR OTHERWISE TRANSFER THE SECURITY EVIDENCED HEREBY EXCEPT (A) TO McKESSON CORPORATION (THE "ISSUER") OR ANY SUBSIDIARY THEREOF, (B) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, (C) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (D) TO AN INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH TRANSFER, FURNISHES TO THE TRUSTEE FOR THE SECURITIES A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THE SECURITY EVIDENCED HEREBY (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM SUCH TRUSTEE), (E) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT OR (F) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE SECURITY EVIDENCED HEREBY IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THE SECURITY EVIDENCED HEREBY PRIOR TO THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT (OR ANY SUCCESSOR PROVISION), THE HOLDER MUST CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO

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THE TRUSTEE FOR THE SECURITIES. IF THE PROPOSED TRANSFEREE IS AN INSTITUTIONAL ACCREDITED INVESTOR OR A PURCHASER WHO IS NOT A U.S. PERSON, THE HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE TRUSTEE FOR THE SECURITIES, SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS THE ISSUER OR THE TRUSTEE MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. THIS LEGEND WILL BE REMOVED AFTER THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES OF THE SECURITY EVIDENCED HEREBY UNDER RULE 144(K) UNDER THE SECURITIES ACT. AS USED HEREIN, THE TERMS "OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT.]

McKesson Corporation, a Delaware corporation (the "Issuer," which term includes any successor corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to _______________________________, the principal sum of _____________________________ Dollars ($______________) on March 1, 2027 and to pay interest on said principal sum from March 1, 1997, or from the most recent interest payment date to which interest has been paid or duly provided for, semiannually in arrears on March 1 and September 1 (each such date, an "Interest Payment Date") of each year commencing on September 1, 1997, at the rate of 7.65% per annum until the principal hereof shall have become due and payable.

The amount of interest payable on any Interest Payment Date shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed, will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which the principal, premium, if any, or interest payable on this Debenture due 2027 is not a Business Day, then payment of principal, premium, if any, or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of such delay). The interest installment so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture (referred to on the reverse hereof) be paid to the person in whose name this Debenture due 2027 is registered at the close of business on the record date for such interest installment, which shall be the close of business on the immediately preceding February 15 and August 15 prior to such Interest

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Payment Date, as applicable. Any such interest installment not punctually paid or duly provided for shall forthwith cease to be payable to the registered holders on such record date and may be paid to the person in whose name this Debenture due 2027 is registered at the close of business on a subsequent record date (which shall be not less than five Business Days prior to the date of payment of such defaulted interest), notice whereof shall be given by mail by or on behalf of the Issuer to the registered holders of Debentures due 2027 not less than 15 days preceding such subsequent record date, all as more fully provided for in the Indenture. The principal of, preimum, if any, and the interest on this Debenture due 2027 shall be payable at the office or agency of the Issuer maintained for that purpose in any coin or currency of the United States of America that at the time of payment is legal tender for payment of public and private debts; provided, however, that payment of interest may be made at the option of the Issuer by check mailed to the person entitled thereto at such address as shall appear in the registry books of the Issuer; provided, further that for so long as this Debenture due 2027 is represented by a Registered Global Security, payment of principal, premium, if any, or interest on this Debenture due 2027 may be made by wire transfer to the account of the Depositary or its nominee.

Unless the certificate of authentication hereon has been executed by or on behalf of the Trustee (as defined below) under the Indenture, by the manual signature of one of its authorized officers, this Debenture due 2027 shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

Capitalized terms used in this Debenture due 2027 which are defined in the Indenture shall have the respective meanings assigned to them in the Indenture.

The provisions of this Debenture due 2027 are continued on the reverse side hereof and such continued provisions shall for all purposes have the same effect as though fully set forth at this place.

[FORM OF REVERSE SIDE OF DEBENTURE]

This Debenture due 2027 is one of a duly authorized series of securities (the "Securities") of the Issuer designated as its 7.65% Debentures due March 1, 2027 (the "Debentures due 2027"). The Securities are all issued or to be issued under and pursuant to an Indenture, dated as of March 11, 1997 (the "Indenture"), duly executed and delivered between the Issuer and The First National Bank of Chicago, a national banking association (the "Trustee," which term includes

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any successor Trustee with respect to the Securities under the Indenture), to which the Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights thereunder of the Issuer, the Trustee and the holders of the Securities and the terms upon which the Debentures due 2027 are to be authenticated and delivered. The terms of individual series of Securities may vary with respect to interest rate or interest rate formulas, issue dates, maturity, redemption, repayment, currency of payment and otherwise.

Except as set forth below, this Debenture due 2027 is not redeemable and is not entitled to the benefit of a sinking fund or any analogous provision.

This Debenture due 2027 is redeemable as a whole or in part, at the option of the Issuer, at any time at a redemption price equal to the greater of
(i) 100% of its principal amount or (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Yield plus 12.5 basis points, plus accrued interest to the date of redemption. The Holder of this Debenture due 2027 will receive notice thereof by first-class mail at least 30 and not more than 60 days prior to the date fixed for redemption.

"Treasury Yield" means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date. "Comparable Treasury Issue" means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term of the Debentures due 2027 that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Debentures due 2027. "Independent Investment Banker" means Morgan Stanley & Co. Incorporated or, if such firm is unwilling or unable to select the Comparable Treasury Issue, an independent investment banking institution of national standing appointed by the Trustee. "Comparable Treasury Price" means, with respect to any redemption date, (i) the average of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on the third business day preceding such redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal Reserve Bank of New York and designated "Composite 3:30 p.m. Quotations for U.S. Government Securities" or (ii) if such release (or any successor

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release) is not published or does not contain such prices on such business day, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (B) if the Trustee obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such Quotations. "Reference Treasury Dealer Quotations" means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Trustee, of the bid and asked prices of the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m. on the third business day preceding such redemption date. "Reference Treasury Dealer" means each of Morgan Stanley & Co. Incorporated, BancAmerica Securities, Inc., Chase Securities Inc. and J.P. Morgan Securities, Inc., and their respective successors; provided, however, that if any of the foregoing shall cease to be a primary U.S. Government Securities dealer in New York City (a "Primary Treasury Dealer"), the Issuer shall substitute therefor another Primary Treasury Dealer.

If an Event of Default with respect to the Debentures due 2027 shall occur and be continuing, the principal of all the Debentures due 2027 may be declared due and payable in the manner and with the effect provided in the Indenture.

The Indenture contains provisions permitting the Issuer and the Trustee, with the consent of the holders of not less than a majority in aggregate principal amount of the Securities of all series issued under such Indenture then outstanding and affected (voting as one class) to add any provisions to, or change in any manner or eliminate any of the provisions of, such Indenture or modify in any manner the rights of the holders of the Securities of each series or Coupons so affected; provided that the Issuer and the Trustee may not, without the consent of the holder of each Outstanding Debenture due 2027 affected thereby, (i) extend the final maturity of the principal of any Security or reduce the principal amount thereof or reduce the rate or extend the time of payment of interest thereon, or reduce any amount payable on redemption thereof or make the principal thereof (including any amount in respect of original issue discount), or interest thereon payable in any coin or currency other than that provided in the Securities or Coupons or in accordance with the terms thereof, or reduce the amount of principal of an Original Issue Discount Security that would be due and payable upon an acceleration of the maturity thereof or the amount thereof provable in bankruptcy or alter certain provisions of the Indenture relating to Securities not denominated in Dollars or the Judgment Currency of such Securities or impair or affect the right of any Securityholder to institute suit for the enforcement of any payment thereof when due

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or, if the Securities provide therefor, any right of repayment at the option of the Securityholder or (ii) reduce the aforesaid percentage in principal amount of Securities of any series issued under such Indenture, the consent of the holders of which is required for any such modification. It is also provided in the Indenture that, with respect to certain defaults or Events of Default regarding the Securities of any series, the holders of a majority in aggregate principal amount Outstanding of the Securities of each such series, each such series voting as a separate class (or, of all Securities, as the case may be voting as a single class) may under certain circumstances waive all defaults with respect to each such series (or with respect to all the Securities, as the case may be) and rescind and annul a declaration of default and its consequences, but no such waiver or rescission and annulment shall extend to or affect any subsequent default or shall impair any right consequent thereto. The preceding sentence shall not, however, apply to a default in the payment of the principal of or interest on any of the Securities.

No reference herein to the Indenture and no provision of this Debenture due 2027 or of the Indenture shall alter or impair the obligation of the Issuer, which is absolute and unconditional, to pay the principal of and interest on this Debenture due 2027 at the time, place and rate, and in the coin or currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Debenture due 2027 may be registered on the registry books of the Issuer, upon surrender of this Debenture due 2027 for registration of transfer at the office or agency of the Issuer maintained by the Issuer for such purpose in the Borough of Manhattan, The City of New York, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Issuer and the Trustee duly executed by, the holder hereof or by its attorney duly authorized in writing, and thereupon one or more new Debentures due 2027 of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Debentures due 2027 are issuable only in registered form in minimum denominations of $100,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, the Debentures due 2027 are exchangeable for a like aggregate principal amount of Debentures due 2027 as requested by the holder surrendering the same.

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No service charge shall be made for any such registration of transfer or exchange, but the Issuer may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection therewith.

Prior to due presentment of this Debenture due 2027 for registration of transfer, the Issuer, the Trustee and any agent of the Issuer or the Trustee may treat the person in whose name this Debenture due 2027 is registered as the owner hereof for all purposes, whether or not this Debenture due 2027 be overdue, and neither the Issuer, the Trustee nor any such agent shall be affected by notice to the contrary.

THE INDENTURE AND THIS DEBENTURE DUE 2027 SHALL BE DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF SUCH STATE, WITHOUT REGARD TO THE CONFLICTS OF LAW PRINCIPLES THEREOF.

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IN WITNESS WHEREOF, the Issuer has caused this instrument to be duly executed, manually or in facsimile, and an imprint or facsimile of its corporate seal to be imprinted hereon.

McKESSON CORPORATION

By:

Nancy A. Miller Vice President and Corporate Secretary

Attest:

By: ____________________
Name:
Title:

CERTIFICATE OF AUTHENTICATION
This is one of the Securities
referred to in the within-mentioned
Indenture.

THE FIRST NATIONAL BANK OF CHICAGO
as Trustee

By: _____________________
Authorized Officer

Dated: ___________________


ASSIGNMENT

[FORM OF ASSIGNMENT FOR DEBENTURES
THAT ARE NOT GLOBAL SECURITIES]

For value received _____________________ hereby sell(s), assign(s) and transfer(s) unto _________________________
(Please insert social security or other taxpayer identification number of assignee.)

the within Debenture due 2027 and hereby irrevocably constitutes and appoints ________ attorney to transfer the said Debenture due 2027 on the books of the Issuer, with full power of substitution in the premises.

In connection with any transfer of the within Debenture due 2027 occurring prior to the Transfer Restriction Termination Date, the undersigned confirms that such Debenture due 2027 is being transferred:

__ To McKesson Corporation or a subsidiary thereof; or

__ Pursuant to and in compliance with Rule 144A under the Securities Act of 1933, as amended; or

__ To an Institutional Accredited Investor pursuant to and in compliance with the Securities Act of 1933, as amended; or

__ Pursuant to and in compliance with Regulation S under the Securities Act of 1933, as amended; or

__ Pursuant to and in compliance with Rule 144 under the Securities Act of 1933, as amended; or

__ Pursuant to an effective registration statement.


and unless the box below is checked, the undersigned confirms that such Debenture is not being transferred to an "affiliate" of the Issuer as defined in Rule 144 under the Securities Act of 1933, as amended (an "Affiliate"):

__ The transferee is an Affiliate of the Issuer.

Dated: ____________________________



Signature(s)


Signature Guarantee/1/

NOTICE: The above signature(s) of the holder(s) hereof must correspond with the name(s) written on the face of this Debenture due 2027 in every particular without alteration or enlargement or any change whatsoever.


/1/ (Signature must be guaranteed by an "eligible guarantor institution," that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Securities Transfer Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)

[FORM OF SCHEDULE FOR ENDORSEMENTS ON GLOBAL SECURITIES
TO REFLECT CHANGES IN PRINCIPAL AMOUNT]

Schedule A

Changes to Principal Amount of Global Securities

              Principal Amount
           of Debentures due 2027
            by which this Global
             Security is to be
           Reduced or Increased,     Remaining Principal
              and Reason for           Amount of this
  Date     Reduction or Increase      Global Security     Notation Made By
---------  ---------------------      ---------------     ----------------


Exhibit 4.3
FORM OF OFFICER'S CERTIFICATE

The undersigned, McKesson Corporation, a Delaware corporation (the "Corporation"), hereby certifies through Nancy A. Miller, its Vice President and Corporate Secretary, pursuant to Section 2.3 of the Indenture, dated as of March 11, 1997 (the "Indenture"), by and between the Company, as Issuer, and First National Bank of Chicago, a national association, as Trustee, as follows:

1. She has read Section 2.3 of the Indenture, read such other documents as she deemed necessary and made such other inquiries as she deemed necessary to make the certifications in paragraph 2 and 3 hereof.

2. Pursuant to the terms of resolutions adopted by the Board of Directors of the Corporation (the "Board of Directors") dated January 29, 1997 and the Finance Committee of the Board of Directors dated March 6, 1997 and action of officers of the Corporation dated March 11, 1997, the terms of the Corporation's 6.60% Exchange Notes due 2000, 6-7/8% Exchange Notes due 2002 and 7.65% Exchange Debentures due 2027 set forth in Annex A, Annex B and Annex C, respectively, attached hereto have been duly adopted by the Corporation.

3. All conditions precedent provided for in the Indenture relating to the issuance of such securities have been complied with.


IN WITNESS WHEREOF, the undersigned has caused this certificate to be executed by its duly authorized officer as of this th day of June 1997.

McKESSON CORPORATION

By:

Nancy A. Miller Vice President and Corporate Secretary

ANNEX A

Pursuant to Section 2.3 of the Indenture, dated as of March 11, 1997 (the "Indenture"), between McKesson Corporation (the "Issuer") and The First National Bank of Chicago, a national banking association, as trustee (the "Trustee"), the terms of a series of securities to be issued pursuant to the Indenture are as follows:

1. Designation. The designation of the securities is "6.60% Exchange Notes due March 1, 2000" (the "Exchange Notes due 2000").

2. Aggregate Principal Amount. The Exchange Notes due 2000 shall be limited in aggregate principal amount to $175,000,000 (except for Exchange Notes due 2000 authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Exchange Notes due 2000 pursuant to Section 2.8, 2.9, 2.11, 8.5 or 12.3 of the Indenture).

3. Currency Denomination. The Exchange Notes due 2000 shall be denominated in Dollars.

4. Maturity. The date on which the principal of the Exchange Notes due 2000 is payable is March 1, 2000.

5. Rate of Interest; Interest Payment Date; Regular Record
Dates. Each Exchange Note due 2000 shall bear interest from March 1, 1997 at 6.60% per annum until the principal thereof is paid. Such interest shall be payable semiannually in arrears on March 1 and September 1 of each year, commencing on September 1, 1997, to the persons in whose names the Exchange Notes due 2000 are registered at the close of business on the immediately preceding February 15 and August 15, respectively. Interest on the Exchange Notes due 2000 shall accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of original issuance. Interest on the Exchange Notes due 2000 shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which principal, premium, if any, or interest

is payable on the Exchange Notes due 2000 is not a Business Day, then payment of the principal, premium, if any, or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of any such delay).

6. Place of Payment. Principal of, premium, if any, and interest on the Exchange Notes due 2000 shall be payable, and the transfer of Exchange Notes due 2000 shall be registrable, at the office or agency of the Issuer to be maintained for such purpose in the Borough of Manhattan, The City of New York, except that, at the option of the Issuer, interest may be paid by mailing a check to the address of the person entitled thereto as it appears on the Exchange Notes due 2000 register; provided, however, that while any Exchange Notes due 2000 are represented by a Registered Global Security, payment of principal of, premium, if any, or interest on the Exchange Notes due 2000 may be made by wire transfer to the account of the Depositary or its nominee.

7. Optional Redemption. The Exchange Notes due 2000 are not optionally redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

8. Mandatory Redemption. The Exchange Notes due 2000 are not mandatorily redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

9. Denominations. The Exchange Notes due 2000 shall be issued initially in minimum denominations of $100,000 and shall be issued in integral multiples of $1,000 in excess thereof.

10. Amount Payable Upon Acceleration. The principal of the Exchange Notes due 2000 shall be payable upon declaration of acceleration pursuant to Section 5.1 of the Indenture.

11. Payment Currency. Principal and interest on the Exchange Notes due 2000 shall be payable in Dollars.

12. Payment Currency - Election. The principal of and interest on the Exchange Notes due 2000 shall not be payable in a currency other than Dollars.

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13. Payment Currency - Index. The principal of and interest on the Exchange Notes due 2000 shall not be determined with reference to an index based on a coin or currency.

14. Registered Securities. The Exchange Notes due 2000 shall be issuable as Registered Securities. The Exchange Notes due 2000 may be issued as Registered Global Securities.

15. Additional Amounts. The Issuer shall not pay additional amounts on the Exchange Notes due 2000 held by a Person that is not a U.S. Person in respect of taxes or similar charges withheld or deducted.

16. Definitive Certificates. Section 2.8 of the Indenture will govern the transferability of Exchange Notes due 2000 in definitive form.

17. Registrar; Paying Agent; Depositary. The Trustee shall initially serve as the registrar and the paying agent for the Exchange Notes due 2000. The Depository Trust Company shall initially serve as the Depositary for the Registered Global Security representing Exchange Notes due 2000.

18. Events of Default; Covenants. There shall be no deletions from, modifications or additions to the Events of Default set forth in Section 5.1 of the Indenture with respect to the Exchange Notes due 2000. There shall be the following additions to the covenants of the Issuer set forth in Article III with respect to the Exchange Notes due 2000:

Limitation on Liens. The Issuer covenants that, so long as any of the Exchange Notes due 2000 remain outstanding, it shall not, nor shall it permit any Consolidated Subsidiary to, create or assume any Indebtedness for money borrowed which is secured by a mortgage, pledge, security interest or lien ("liens") of or upon any assets, whether now owned or hereafter acquired, of the Issuer or any such Consolidated Subsidiary without equally and ratably securing the Exchange Notes due 2000 by a lien ranking ratably with and equal to (or at the option of the Issuer, senior to) such secured Indebtedness, except that the foregoing restriction shall not apply to (a) liens on any assets of any corporation existing at the time such corporation becomes a Consolidated Subsidiary; (b) liens on any assets existing at the time of acquisition of such assets by

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the Issuer or a Consolidated Subsidiary, or liens to secure the payment of all or any part of the purchase price of such assets upon the acquisition of such assets by the Issuer or a Consolidated Subsidiary or to secure any indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary prior to, at the time of, or within 360 days after such acquisition (or in the case of real property, the completion of construction (including any improvements on an existing asset) or commencement of full operation of such asset, whichever is later) which indebtedness is incurred or guaranteed for the purpose of financing all or any part of the purchase price thereof or, in the case of real property, construction or improvements thereon; provided, however, that in the case of any such acquisition, construction or improvement, the lien shall not apply to any assets theretofore owned by the Issuer or a Consolidated Subsidiary, other than, in the case of any such construction or improvement, any real property on which the property so constructed, or the improvement, is located, or to secure the payment of the purchase price of such assets, or to secure indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary for the purpose of financing the purchase price of such assets or improvements or construction thereon, which indebtedness is incurred or guaranteed prior to, at the time of or within 360 days after such acquisition (or in the case of real property, completion of such improvement or construction or commencement of full operation of such property, whichever is later); (c) liens on any assets securing indebtedness owed by any Consolidated Subsidiary to the Issuer or another wholly owned Subsidiary; (d) liens on any assets of a corporation existing at the time such corporation is merged into or consolidated with the Issuer or a Subsidiary or at the time of a purchase, lease or other acquisition of the assets of a corporation or firm as an entirety or substantially as an entirety by the Issuer or a Subsidiary;
(e) liens on any assets of the Issuer or a Consolidated Subsidiary in favor of the United States of America or any state thereof, or any department, agency or instrumentality or political subdivision of the United States of America or any State thereof, or in favor of any other country, or any political subdivision thereof, to secure partial, progress, advance or other payments pursuant to any contract or statute or to secure any indebtedness incurred or guaranteed for the purpose of financing all or any part of the purchase price (or, in the case of real property, the cost of construction) of the assets subject to such liens

4

(including, but not limited to, liens incurred in connection with pollution control, industrial revenue or similar financing); (f) any extension, renewal or replacement (or successive extensions, renewals or replacements), in whole or in part, of any lien referred to in the foregoing clauses
(a) to (e), inclusive; provided, however, that the principal amount of indebtedness secured thereby shall not exceed the principal amount of indebtedness so secured at the time of such extension, renewal or replacement, and that such extension, renewal or replacement shall be limited to all or a part of the assets which secured the lien so extended, renewed or replaced (plus improvements and construction on such real property); (g) liens imposed by law, such as mechanics', workmen's, repairmen's, materialmen's, carriers', warehousemen's, vendors' or other similar liens arising in the ordinary course of business, or governmental (federal, state or municipal) liens arising out of contracts for the sale of products or services by the Issuer or any Consolidated Subsidiary, or deposits or pledges to obtain the release of any of the foregoing liens; (h) pledges, liens or deposits under worker's compensation laws or similar legislation and liens or judgments thereunder which are not currently dischargeable, or in connection with bids, tenders, contracts (other than for the payment of money) or leases to which the Issuer or any Consolidated Subsidiary is a party, or to secure public or statutory obligations of the Issuer or any Consolidated Subsidiary, or in connection with obtaining or maintaining self-insurance or to obtain the benefits of any law, regulation or arrangement pertaining to unemployment insurance, old age pensions, social security or similar matters, or to secure surety, appeal or customs bonds to which the Issuer or any Consolidated Subsidiary is a party, or in litigation or other proceedings such as, but not limited to, interpleader proceedings, and other similar pledges, liens or deposits made or incurred in the ordinary course of business; (i) liens created by or resulting from any litigation or other proceeding which is being contested in good faith by appropriate proceedings, including liens arising out of judgements or awards against the Issuer or any Consolidated Subsidiary with respect to which the Issuer or such Consolidated Subsidiary is in good faith prosecuting an appeal or proceedings for review or for which the time to make an appeal has not yet expired; or final unappealable judgment liens which are satisfied within 15 days of the date of judgment; or liens incurred by the Issuer or any

5

Consolidated Subsidiary for the purpose of obtaining a stay or discharge in the course of any litigation or other proceeding to which the Issuer or such Consolidated Subsidiary is a party; or (j) liens for taxes or assessments or governmental charges or levies not yet due or delinquent, or which can thereafter be paid without penalty, or which are being contested in good faith by appropriate proceedings; landlord's liens on property held under lease; and any other liens or charges incidental to the conduct of the business of the Issuer or any Consolidated Subsidiary or the ownership of the assets of any of them which were not incurred in connection with the borrowing of money or the obtaining of advances or credit and which do not, in the opinion of the Issuer, materially impair the use of such assets in the operation of the business of the Issuer or such Consolidated Subsidiary or the value of such assets for the purposes thereof. Notwithstanding the above, the Issuer or any Consolidated Subsidiary may, without securing the Exchange Notes due 2000, create or assume any Indebtedness which is secured by a lien which would otherwise be subject to the foregoing restrictions, provided that at the time of such creation or assumption, after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

Limitation on Sale and Lease-Back Transactions. The Issuer covenants that, so long as any of the Exchange Notes due 2000 remain outstanding, it will not, nor shall it permit any Consolidated Subsidiary to, enter into any sale and lease-back transaction with respect to any assets, other than any sale leaseback transaction (involving a lease for a term of not more than three years), unless either (a) the Issuer or such Consolidated Subsidiary would be entitled to incur Indebtedness secured by a lien on the assets to be leased in an amount at least equal to the Attributable Debt in respect of such transaction without equally and ratably securing the Exchange Notes due 2000 pursuant to clauses (a) through (j) inclusive of the covenant with respect to "Limitation on Liens" above, or (b) the proceeds of the sale of the assets to be leased are at least equal to their fair market value (as determined by the Board of Directors of the Issuer) and the proceeds are applied to the purchase or acquisition (or, in the case of real property, the construction) of assets or to the retirement (other than at maturity or pursuant to a mandatory sinking fund or mandato-

6

ry redemption provision) of indebtedness. The foregoing limitation shall not apply, if at the time the Issuer or any Consolidated Subsidiary enters into such sale and lease-back transaction, and after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

The term "Attributable Debt" in connection with a sale and lease-back transaction shall mean, as of the date of determination, the lesser of (a) the fair value of the assets subject to such transaction or (b) the present value (discounted at the rate of interest set forth in or implicit in the terms of such lease or, if it is not practicable to determine such rate, the weighted average interest rate per annum borne by all series of Securities then Outstanding and subject to the Limitation on Sale and Leaseback Transactions compounded semiannually, in either case as determined by the principal accounting or financial officer of the Issuer) of the obligations of the Issuer or any Consolidated Subsidiary for net rental payments during the remaining term of all leases (including any period for which such lease has been extended or may, at the option of the lessor, be extended). The term "net rental payments" under any lease of any period shall mean the sum of the rental and other payments required to be paid in such period by the lessee thereunder, not including, however, any amounts required to be paid by such lessee (whether or not designated as rental or additional rental) on account of maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges required to be paid by such lessee thereunder or any amounts required to be paid by such lessee thereunder contingent upon the amount of sales, maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges. The term "Consolidated Subsidiary" shall mean any Subsidiary substantially all the property of which is located, and substantially all the operations of which are conducted, in the United States of America whose financial statements are consolidated with those of the Issuer in accordance with generally accepted accounting principles. The term "Exempted Debt" shall mean the sum of the following as of the date of determination:
(i) Indebtedness of the Issuer and its Consolidated Subsidiaries incurred after the date of the Indenture and secured by liens not permitted to be created or assumed pursuant to the covenant with respect

7

to "Limitation on Liens" above, and (ii) Attributable Debt of the Issuer and its Consolidated Subsidiaries in respect of every sale and lease-back transaction entered into after the date of the Indenture, other than leases expressly permitted by the covenant with respect to "Limitation on Sale and Lease-Back Transactions" above. The term "Indebtedness" shall mean all items classified as indebtedness on the most recently available consolidated balance sheet of the Issuer and its Consolidated Subsidiaries, in accordance with generally accepted accounting principles.

19 Conversion and Exchange. The Exchange Notes due 2000 shall not be convertible into or exchangeable into any other security.

20. Other Terms. The Exchange Notes due 2000 shall have the other terms and shall be substantially in the form set forth in the form of Exchange Notes due 2000 attached hereto as Exhibit A. In case of any conflict between this Annex A and the Exchange Notes due 2000 in the form attached hereto as Exhibit A, the form of the Exchange Notes due 2000 shall control.

Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Indenture.

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EXHIBIT A

[FORM OF FACE OF EXCHANGE NOTE DUE MARCH 1, 2000]

[IF THE EXCHANGE NOTE DUE 2000 IS TO BE A GLOBAL SECURITY, INSERT THE

FOLLOWING - - THIS EXCHANGE NOTE DUE 2000 IS A BOOK-ENTRY SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A DEPOSITARY. THIS EXCHANGE NOTE DUE 2000 IS EXCHANGEABLE FOR EXCHANGE NOTES DUE 2000 REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS EXCHANGE NOTE DUE 2000 (OTHER THAN A TRANSFER OF THIS EXCHANGE NOTE DUE 2000 AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY) MAY BE REGISTERED EXCEPT IN SUCH LIMITED CIRCUMSTANCES.

UNLESS THIS EXCHANGE NOTE DUE 2000 IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY EXCHANGE NOTE DUE 2000 ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT HEREON IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

No. __________ CUSIP NO. ________

MCKESSON CORPORATION

6.60% EXCHANGE NOTE DUE MARCH 1, 2000

McKesson Corporation, a Delaware corporation (the "Issuer," which term includes any successor corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to, _____________________________,


the principal sum of _________________________ Dollars ($______) on March 1, 2000 and to pay interest on said principal sum from March 1, 1997, or from the most recent interest payment date to which interest has been paid or duly provided for, semiannually in arrears on March 1 and September 1 (each such date, an "Interest Payment Date") of each year commencing on September 1, 1997, at the rate of 6.60% per annum until the principal hereof shall have become due and payable.

The amount of interest payable on any Interest Payment Date shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed, will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which the principal or interest payable on this Exchange Note due 2000 is not a Business Day, then payment of principal or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of such delay). The interest installment so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture (referred to on the reverse hereof) be paid to the person in whose name this Exchange Note due 2000 is registered at the close of business on the record date for such interest installment, which shall be the close of business on the immediately preceding February 15 and August 15 prior to such Interest Payment Date, as applicable. Any such interest installment not punctually paid or duly provided for shall forthwith cease to be payable to the registered holders on such record date and may be paid to the person in whose name this Exchange Note due 2000 is registered at the close of business on a subsequent record date (which shall be not less than five Business Days prior to the date of payment of such defaulted interest), notice whereof shall be given by mail by or on behalf of the Issuer to the registered holders of Exchange Notes due 2000 not less than 15 days preceding such subsequent record date, all as more fully provided in the Indenture. The principal of and the interest on this Exchange Note due 2000 shall be payable at the office or agency of the Issuer maintained for that purpose in any coin or currency of the United States of America that at the time of payment is legal tender for payment of public and private debts; provided, however, that payment of interest may be made at the option of the Issuer by check mailed to the person entitled thereto at such address as shall appear in the registry books of the Issuer; provided, further that for so long as this Exchange Note due 2000 is represented by a Registered Global Security, payment of principal, premium, if any, or interest on this Exchange Note due 2000 may be made by wire transfer to the account of the Depositary or its nominee.

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Unless the certificate of authentication hereon has been executed by or on behalf of the Trustee (as defined below) under the Indenture, by the manual signature of one of its authorized officers, this Exchange Note due 2000 shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

Capitalized terms used in this Exchange Note due 2000 which are defined in the Indenture shall have the respective meanings assigned to them in the Indenture.

The provisions of this Exchange Note due 2000 are continued on the reverse side hereof and such continued provisions shall for all purposes have the same effect as though fully set forth at this place.

[FORM OF REVERSE SIDE OF EXCHANGE NOTE]

This Exchange Note due 2000 is one of a duly authorized series of securities (the "Securities") of the Issuer designated as its 6.60% Exchange Notes due March 1, 2000 (the "Exchange Notes due 2000"). The Securities are all issued or to be issued under and pursuant to an Indenture, dated as of March 11, 1997 (the "Indenture"), duly executed and delivered between the Issuer and The First National Bank of Chicago, a national banking association (the "Trustee," which term includes any successor Trustee with respect to the Securities under the Indenture), to which the Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights thereunder of the Issuer, the Trustee and the holders of the Securities and the terms upon which the Exchange Notes due 2000 are to be authenticated and delivered. The terms of individual series of Securities may vary with respect to interest rate or interest rate formulas, issue dates, maturity, redemption, repayment, currency of payment and otherwise.

This Exchange Note due 2000 is not redeemable and is not entitled to the benefit of a sinking fund or any analogous provision.

If an Event of Default with respect to the Exchange Notes due 2000 shall occur and be continuing, the principal of all the Exchange Notes due 2000 may be declared due and payable in the manner and with the effect provided in the Indenture.

The Indenture contains provisions permitting the Issuer and the Trustee, with the consent of the holders of not less than a majority in aggregate principal amount of the Securities of all series issued under such Indenture then

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outstanding and affected (voting as one class) to add any provisions to, or change in any manner or eliminate any of the provisions of, such Indenture or modify in any manner the rights of the holders of the Securities of each series or Coupons so affected; provided that the Issuer and the Trustee may not, without the consent of the holder of each Outstanding Exchange Note due 2000 affected thereby, (i) extend the final maturity of the principal of any Security or reduce the principal amount thereof or reduce the rate or extend the time of payment of interest thereon, or reduce any amount payable on redemption thereof or make the principal thereof (including any amount in respect of original issue discount), or interest thereon payable in any coin or currency other than that provided in the Securities or Coupons or in accordance with the terms thereof, or reduce the amount of principal of an Original Issue Discount Security that would be due and payable upon an acceleration of the maturity thereof or the amount thereof provable in bankruptcy or alter certain provisions of the Indenture relating to Securities not denominated in Dollars or the Judgment Currency of such Securities or impair or affect the right of any Securityholder to institute suit for the enforcement of any payment thereof when due or, if the Securities provide therefor, any right of repayment at the option of the Securityholder or (ii) reduce the aforesaid percentage in principal amount of Securities of any series issued under such Indenture, the consent of the holders of which is required for any such modification. It is also provided in the Indenture that, with respect to certain defaults or Events of Default regarding the Securities of any series, the holders of a majority in aggregate principal amount Outstanding of the Securities of each such series, each such series voting as a separate class (or, of all Securities, as the case may be voting as a single class) may under certain circumstances waive all defaults with respect to each such series (or with respect to all the Securities, as the case may be) and rescind and annul a declaration of default and its consequences, but no such waiver or rescission and annulment shall extend to or affect any subsequent default or shall impair any right consequent thereto. The preceding sentence shall not, however, apply to a default in the payment of the principal of or interest on any of the Securities.

No reference herein to the Indenture and no provision of this Exchange Note due 2000 or of the Indenture shall alter or impair the obligation of the Issuer, which is absolute and unconditional, to pay the principal of and interest on this Exchange Note due 2000 at the time, place and rate, and in the coin or currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Exchange Note due 2000 may be registered on the registry books of the Issuer, upon surrender of this Exchange Note due 2000 for

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registration of transfer at the office or agency of the Issuer maintained by the Issuer for such purpose in the Borough of Manhattan, The City of New York, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Issuer and the Trustee duly executed by, the holder hereof or by its attorney duly authorized in writing, and thereupon one or more new Exchange Notes due 2000 of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Exchange Notes due 2000 are issuable only in registered form in minimum denominations of $100,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, the Exchange Notes due 2000 are exchangeable for a like aggregate principal amount of Exchange Notes due 2000 as requested by the holder surrendering the same.

No service charge shall be made for any such registration of transfer or exchange, but the Issuer may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection therewith.

Prior to due presentment of this Exchange Note due 2000 for registration of transfer, the Issuer, the Trustee and any agent of the Issuer or the Trustee may treat the person in whose name this Exchange Note due 2000 is registered as the owner hereof for all purposes, whether or not this Exchange Note due 2000 be overdue, and neither the Issuer, the Trustee nor any such agent shall be affected by notice to the contrary.

THE INDENTURE AND THIS EXCHANGE NOTE DUE 2000 SHALL BE DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF SUCH STATE, WITHOUT REGARD TO THE CONFLICTS OF LAW PRINCIPLES THEREOF.

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IN WITNESS WHEREOF, the Issuer has caused this instrument to be duly executed, manually or in facsimile, and in imprint or facsimile of its corporate seal to be imprinted hereon.

McKESSON CORPORATION

By:

Nancy A. Miller Vice President and Corporate Secretary

Attest:

By: ____________________
Name:
Title:

CERTIFICATE OF AUTHENTICATION
This is one of the Securities
referred to in the within-mentioned
Indenture.

THE FIRST NATIONAL BANK OF CHICAGO
as Trustee

By: _____________________
Authorized Officer

Dated: ___________________


ASSIGNMENT

[FORM OF ASSIGNMENT FOR EXCHANGE NOTES
THAT ARE NOT GLOBAL SECURITIES]

For value received _____________________ hereby sell(s), assign(s) and transfer(s) unto _____________________________________________________________ (Please insert social security or other taxpayer identification number of assignee.)

the within Exchange Note due 2000 and hereby irrevocably constitutes and appoints ________ attorney to transfer the said Exchange Note due 2000 on the books of the Issuer, with full power of substitution in the premises.

Dated: ____________________________



Signature(s)


Signature Guarantee/1/

NOTICE: The above signature(s) of the holder(s) hereof must correspond with the name(s) written on the face of this Exchange Note due 2000 in every particular without alteration or enlargement or any change whatsoever.


/1/ (Signature must be guaranteed by an "eligible guarantor institution," that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Securities Transfer Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)

[FORM OF SCHEDULE FOR ENDORSEMENTS ON GLOBAL SECURITIES
TO REFLECT CHANGES IN PRINCIPAL AMOUNT]

Schedule A

Changes to Principal Amount of Global Securities

                Principal Amount of
                Exchange Notes due
                 2000 by which this
              Global Security is to be
               Reduced or Increased,    Remaining Principal
                and Reason for the          Amount of
  Date         Reduction or Increase   this Global Security    Notation Made By
---------      ---------------------   --------------------    ----------------

                                                                        ANNEX B

Pursuant to Section 2.3 of the Indenture, dated as of March 11, 1997 (the "Indenture"), between McKesson Corporation (the "Issuer") and The First National Bank of Chicago, a national banking association, as trustee (the "Trustee"), the terms of a series of securities to be issued pursuant to the Indenture are as follows:

1. Designation. The designation of the securities is "6-7/8% Exchange Notes due March 1, 2002" (the "Exchange Notes due 2002").

2. Aggregate Principal Amount. The Exchange Notes due 2002 shall be limited in aggregate principal amount to $175,000,000 (except for Exchange Notes due 2002 authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Exchange Notes due 2002 pursuant to Section 2.8, 2.9, 2.11, 8.5 or 12.3 of the Indenture).

3. Currency Denomination. The Exchange Notes due 2002 shall be denominated in Dollars.

4. Maturity. The date on which the principal of the Exchange Notes due 2002 is payable is March 1, 2002.

5. Rate of Interest; Interest Payment Date; Regular Record Dates.
Each Exchange Note due 2002 shall bear interest from March 1, 1997 at 6-7/8% per annum until the principal thereof is paid. Such interest shall be payable semiannually in arrears on March 1 and September 1 of each year, commencing on September 1, 1997, to the persons in whose names the Exchange Notes due 2002 are registered at the close of business on the immediately preceding February 15 and August 15, respectively. Interest on the Exchange Notes due 2002 shall accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of original issuance. Interest on the Exchange Notes due 2002 shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which principal, premium, if any, or interest is payable on the

Exchange Notes due 2002 is not a Business Day, then payment of the principal, premium, if any, or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of any such delay).

6. Place of Payment. Principal of, premium, if any, and interest on the Exchange Notes due 2002 shall be payable, and the transfer of Exchange Notes due 2002 shall be registrable, at the office or agency of the Issuer to be maintained for such purpose in the Borough of Manhattan, The City of New York, except that, at the option of the Issuer, interest may be paid by mailing a check to the address of the person entitled thereto as it appears on the Exchange Notes due 2002 register; provided, however, that while any Exchange Notes due 2002 are represented by a Registered Global Security, payment of principal of, premium, if any, or interest on the Exchange Notes due 2002 may be made by wire transfer to the account of the Depositary or its nominee.

7. Optional Redemption. The Exchange Notes due 2002 are not optionally redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

8. Mandatory Redemption. The Exchange Notes due 2002 are not mandatorily redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

9. Denominations. The Exchange Notes due 2002 shall be issued initially in minimum denominations of $100,000 and shall be issued in integral multiples of $1,000 in excess thereof.

10. Amount Payable Upon Acceleration. The principal of the Exchange Notes due 2002 shall be payable upon declaration of acceleration pursuant to Section 5.1 of the Indenture.

11. Payment Currency. Principal and interest on the Exchange Notes due 2002 shall be payable in Dollars.

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12. Payment Currency - Election. The principal of and interest on the Exchange Notes due 2002 shall not be payable in a currency other than Dollars.

13. Payment Currency - Index. The principal of and interest on the Exchange Notes due 2002 shall not be determined with reference to an index based on a coin or currency.

14. Registered Securities. The Exchange Notes due 2002 shall be issuable as Registered Securities. The Exchange Notes due 2002 may be issued as Registered Global Securities.

15. Additional Amounts. The Issuer shall not pay additional amounts on the Exchange Notes due 2002 held by a Person that is not a U.S. Person in respect of taxes or similar charges withheld or deducted.

16. Definitive Certificates. Section 2.8 of the Indenture will govern the transferability of Exchange Notes due 2002 in definitive form.

17. Registrar; Paying Agent; Depositary. The Trustee shall initially serve as the registrar and the paying agent for the Exchange Notes due 2002. The Depository Trust Company shall initially serve as the Depositary for the Registered Global Security representing Exchange Notes due 2002.

18. Events of Default; Covenants. There shall be no deletions from, modifications or additions to the Events of Default set forth in
Section 5.1 of the Indenture with respect to the Exchange Notes due 2002. There shall be the following additions to the covenants of the Issuer set forth in Article III with respect to the Exchange Notes due 2002:

Limitation on Liens. The Issuer covenants that, so long as any of the Exchange Notes due 2002 remain outstanding, it shall not, nor shall it permit any Consolidated Subsidiary to, create or assume any Indebtedness for money borrowed which is secured by a mortgage, pledge, security interest or lien ("liens") of or upon any assets, whether now owned or hereafter acquired, of the Issuer or any such Consolidated Subsidiary without equally and ratably

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securing the Exchange Notes due 2002 by a lien ranking ratably with and equal to (or at the option of the Issuer, senior to) such secured Indebtedness, except that the foregoing restriction shall not apply to (a) liens on any assets of any corporation existing at the time such corporation becomes a Consolidated Subsidiary; (b) liens on any assets existing at the time of acquisition of such assets by the Issuer or a Consolidated Subsidiary, or liens to secure the payment of all or any part of the purchase price of such assets upon the acquisition of such assets by the Issuer or a Consolidated Subsidiary or to secure any indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary prior to, at the time of, or within 360 days after such acquisition (or in the case of real property, the completion of construction (including any improvements on an existing asset) or commencement of full operation of such asset, whichever is later) which indebtedness is incurred or guaranteed for the purpose of financing all or any part of the purchase price thereof or, in the case of real property, construction or improvements thereon; provided, however, that in the case of any such acquisition, construction or improvement, the lien shall not apply to any assets theretofore owned by the Issuer or a Consolidated Subsidiary, other than, in the case of any such construction or improvement, any real property on which the property so constructed, or the improvement, is located, or to secure the payment of the purchase price of such assets, or to secure indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary for the purpose of financing the purchase price of such assets or improvements or construction thereon, which indebtedness is incurred or guaranteed prior to, at the time of or within 360 days after such acquisition (or in the case of real property, completion of such improvement or construction or commencement of full operation of such property, whichever is later); (c) liens on any assets securing indebtedness owed by any Consolidated Subsidiary to the Issuer or another wholly owned Subsidiary; (d) liens on any assets of a corporation existing at the time such corporation is merged into or consolidated with the Issuer or a Subsidiary or at the time of a purchase, lease or other acquisition of the assets of a corporation or firm as an entirety or substantially as an entirety by the Issuer or a Subsidiary; (e) liens on any assets of the Issuer or a Consolidated Subsidiary in favor of the United States of America or any state thereof, or any

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department, agency or instrumentality or political subdivision of the United States of America or any State thereof, or in favor of any other country, or any political subdivision thereof, to secure partial, progress, advance or other payments pursuant to any contract or statute or to secure any indebtedness incurred or guaranteed for the purpose of financing all or any part of the purchase price (or, in the case of real property, the cost of construction) of the assets subject to such liens (including, but not limited to, liens incurred in connection with pollution control, industrial revenue or similar financing); (f) any extension, renewal or replacement (or successive extensions, renewals or replacements), in whole or in part, of any lien referred to in the foregoing clauses (a) to (e), inclusive; provided, however, that the principal amount of indebtedness secured thereby shall not exceed the principal amount of indebtedness so secured at the time of such extension, renewal or replacement, and that such extension, renewal or replacement shall be limited to all or a part of the assets which secured the lien so extended, renewed or replaced (plus improvements and construction on such real property); (g) liens imposed by law, such as mechanics', workmen's, repairmen's, materialmen's, carriers', warehousemen's, vendors' or other similar liens arising in the ordinary course of business, or governmental (federal, state or municipal) liens arising out of contracts for the sale of products or services by the Issuer or any Consolidated Subsidiary, or deposits or pledges to obtain the release of any of the foregoing liens; (h) pledges, liens or deposits under worker's compensation laws or similar legislation and liens or judgments thereunder which are not currently dischargeable, or in connection with bids, tenders, contracts (other than for the payment of money) or leases to which the Issuer or any Consolidated Subsidiary is a party, or to secure public or statutory obligations of the Issuer or any Consolidated Subsidiary, or in connection with obtaining or maintaining self- insurance or to obtain the benefits of any law, regulation or arrangement pertaining to unemployment insurance, old age pensions, social security or similar matters, or to secure surety, appeal or customs bonds to which the Issuer or any Consolidated Subsidiary is a party, or in litigation or other proceedings such as, but not limited to, interpleader proceedings, and other similar pledges, liens or deposits made or incurred in the ordinary course of business; (i) liens created by or resulting from any litigation or

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other proceeding which is being contested in good faith by appropriate proceedings, including liens arising out of judgements or awards against the Issuer or any Consolidated Subsidiary with respect to which the Issuer or such Consolidated Subsidiary is in good faith prosecuting an appeal or proceedings for review or for which the time to make an appeal has not yet expired; or final unappealable judgment liens which are satisfied within 15 days of the date of judgment; or liens incurred by the Issuer or any Consolidated Subsidiary for the purpose of obtaining a stay or discharge in the course of any litigation or other proceeding to which the Issuer or such Consolidated Subsidiary is a party; or (j) liens for taxes or assessments or governmental charges or levies not yet due or delinquent, or which can thereafter be paid without penalty, or which are being contested in good faith by appropriate proceedings; landlord's liens on property held under lease; and any other liens or charges incidental to the conduct of the business of the Issuer or any Consolidated Subsidiary or the ownership of the assets of any of them which were not incurred in connection with the borrowing of money or the obtaining of advances or credit and which do not, in the opinion of the Issuer, materially impair the use of such assets in the operation of the business of the Issuer or such Consolidated Subsidiary or the value of such assets for the purposes thereof. Notwithstanding the above, the Issuer or any Consolidated Subsidiary may, without securing the Exchange Notes due 2002, create or assume any Indebtedness which is secured by a lien which would otherwise be subject to the foregoing restrictions, provided that at the time of such creation or assumption, after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

Limitation on Sale and Lease-Back Transactions. The Issuer covenants that, so long as any of the Exchange Notes due 2002 remain outstanding, it will not, nor shall it permit any Consolidated Subsidiary to, enter into any sale and lease-back transactions with respect to any assets, other than any sale leaseback transaction (involving a lease for a term of not more than three years), unless either (a) the Issuer or such Consolidated Subsidiary would be entitled to incur Indebtedness secured by a lien on the assets to

6

be leased in an amount at least equal to the Attributable Debt in respect of such transaction without equally and ratably securing the Exchange Notes due 2002 pursuant to clauses (a) through (j) inclusive of the covenant with respect to "Limitation on Liens" above, or (b) the proceeds of the sale of the assets to be leased are at least equal to their fair market value (as determined by the Board of Directors of the Issuer) and the proceeds are applied to the purchase or acquisition (or, in the case of real property, the construction) of assets or to the retirement (other than at maturity or pursuant to a mandatory sinking fund or mandatory redemption provision) of indebtedness. The foregoing limitation shall not apply, if at the time the Issuer or any Consolidated Subsidiary enters into such sale and lease-back transaction, and after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

The term "Attributable Debt" in connection with a sale and lease- back transaction shall mean, as of the date of determination, the lesser of (a) the fair value of the assets subject to such transaction or (b) the present value (discounted at the rate of interest set forth in or implicit in the terms of such lease or, if it is not practicable to determine such rate, the weighted average interest rate per annum borne by all series of Securities then Outstanding and subject to the Limitation Sale and Leaseback Transactions and compounded semiannually, in either case as determined by the principal accounting or financial officer of the Issuer) of the obligations of the Issuer or any Consolidated Subsidiary for net rental payments during the remaining term of all leases (including any period for which such lease has been extended or may, at the option of the lessor, be extended). The term "net rental payments" under any lease of any period shall mean the sum of the rental and other payments required to be paid in such period by the lessee thereunder, not including, however, any amounts required to be paid by such lessee (whether or not designated as rental or additional rental) on account of maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges required to be paid by such lessee thereunder or any amounts required to be paid by such lessee thereunder contingent

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upon the amount of sales, maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges. The term "Consolidated Subsidiary" shall mean any Subsidiary substantially all the property of which is located, and substantially all the operations of which are conducted, in the United States of America whose financial statements are consolidated with those of the Issuer in accordance with generally accepted accounting principles. The term "Exempted Debt" shall mean the sum of the following as of the date of determination: (i) Indebtedness of the Issuer and its Consolidated Subsidiaries incurred after the date of the Indenture and secured by liens not permitted to be created or assumed pursuant to the covenant with respect to "Limitation on Liens" above, and (ii) Attributable Debt of the Issuer and its Consolidated Subsidiaries in respect of every sale and lease-back transaction entered into after the date of the Indenture, other than leases expressly permitted by the covenant with respect to "Limitation on Sale and Lease-Back Transactions" above. The term "Indebtedness" shall mean all items classified as indebtedness on the most recently available consolidated balance sheet of the Issuer and its Consolidated Subsidiaries, in accordance with generally accepted accounting principles.

19. Conversion and Exchange. The Exchange Notes due 2002 shall not be convertible for or exchangeable into any other security.

20. Other Terms. The Exchange Notes due 2002 shall have the other terms and shall be substantially in the form set forth in the form of Exchange Notes due 2002 attached hereto as Exhibit A. In case of any conflict between this Annex B and the Exchange Notes due 2002 in the form attached hereto as Exhibit A, the form of the Exchange Notes due 2002 shall control.

Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Indenture.

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EXHIBIT A

[FORM OF FACE OF EXCHANGE NOTE DUE MARCH 1, 2002]

[IF THE EXCHANGE NOTE DUE 2002 IS TO BE A GLOBAL SECURITY, INSERT THE

FOLLOWING - - THIS EXCHANGE NOTE DUE 2002 IS A BOOK-ENTRY SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A DEPOSITARY. THIS EXCHANGE NOTE DUE 2002 IS EXCHANGEABLE FOR EXCHANGE NOTES DUE 2002 REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS EXCHANGE NOTE DUE 2002 (OTHER THAN A TRANSFER OF THIS EXCHANGE NOTE DUE 2002 AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY) MAY BE REGISTERED EXCEPT IN SUCH LIMITED CIRCUMSTANCES.

UNLESS THIS EXCHANGE NOTE DUE 2002 IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY EXCHANGE NOTE DUE 2002 ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT HEREON IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

No. __________ CUSIP NO. ________

MCKESSON CORPORATION

6-7/8% EXCHANGE NOTE DUE MARCH 1, 2002

McKesson Corporation, a Delaware corporation (the "Issuer," which term includes any successor corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to, ______________________________,


the principal sum of _________________________ Dollars ($______) on March 1, 2002 and to pay interest on said principal sum from March 1, 1997, or from the most recent interest payment date to which interest has been paid or duly provided for, semiannually in arrears on March 1 and September 1 (each such date, an "Interest Payment Date") of each year commencing on September 1, 1997, at the rate of 6-7/8% per annum until the principal hereof shall have become due and payable.

The amount of interest payable on any Interest Payment Date shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed, will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which the principal or interest payable on this Exchange Note due 2002 is not a Business Day, then payment of principal or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of such delay). The interest installment so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture (referred to on the reverse hereof) be paid to the person in whose name this Exchange Note due 2002 is registered at the close of business on the record date for such interest installment, which shall be the close of business on the immediately preceding February 15 and August 15 prior to such Interest Payment Date, as applicable. Any such interest installment not punctually paid or duly provided for shall forthwith cease to be payable to the registered holders on such record date and may be paid to the person in whose name this Exchange Note due 2002 is registered at the close of business on a subsequent record date (which shall be not less than five Business Days prior to the date of payment of such defaulted interest), notice whereof shall be given by mail by or on behalf of the Issuer to the registered holders of Exchange Notes due 2002 not less than 15 days preceding such subsequent record date, all as more fully provided in the Indenture. The principal of and the interest on this Exchange Note due 2002 shall be payable at the office or agency of the Issuer maintained for that purpose in any coin or currency of the United States of America that at the time of payment is legal tender for payment of public and private debts; provided, however, that payment of interest may be made at the option of the Issuer by check mailed to the person entitled thereto at such address as shall appear in the registry books of the Issuer; provided, further that for so long as this Exchange Note due 2002 is represented by a Registered Global Security, payment of principal, premium, if any, or interest on this Exchange Note due 2002 may be made by wire transfer to the account of the Depositary or its nominee.

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Unless the certificate of authentication hereon has been executed by or on behalf of the Trustee (as defined below) under the Indenture, by the manual signature of one of its authorized officers, this Exchange Note due 2002 shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

Capitalized terms used in this Exchange Note due 2002 which are defined in the Indenture shall have the respective meanings assigned to them in the Indenture.

The provisions of this Exchange Note due 2002 are continued on the reverse side hereof and such continued provisions shall for all purposes have the same effect as though fully set forth at this place.

[FORM OF REVERSE SIDE OF EXCHANGE NOTE]

This Exchange Note due 2002 is one of a duly authorized series of securities (the "Securities") of the Issuer designated as its 6-7/8% Exchange Notes due March 1, 2002 (the "Exchange Notes due 2002"). The Securities are all issued or to be issued under and pursuant to an Indenture, dated as of March 11, 1997 (the "Indenture"), duly executed and delivered between the Issuer and The First National Bank of Chicago, a national banking association (the "Trustee," which term includes any successor Trustee with respect to the Securities under the Indenture), to which the Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights thereunder of the Issuer, the Trustee and the holders of the Securities and the terms upon which the Exchange Notes due 2002 are to be authenticated and delivered. The terms of individual series of Securities may vary with respect to interest rate or interest rate formulas, issue dates, maturity, redemption, repayment, currency of payment and otherwise.

This Exchange Note due 2002 is not redeemable and is not entitled to the benefit of a sinking fund or any analogous provision.

If an Event of Default with respect to the Exchange Notes due 2002 shall occur and be continuing, the principal of all the Exchange Notes due 2002 may be declared due and payable in the manner and with the effect provided in the Indenture.

The Indenture contains provisions permitting the Issuer and the Trustee, with the consent of the holders of not less than a majority in aggregate principal amount of the Securities of all series issued under such Indenture then

3

outstanding and affected (voting as one class) to add any provisions to, or change in any manner or eliminate any of the provisions of, such Indenture or modify in any manner the rights of the holders of the Securities of each series or Coupons so affected; provided that the Issuer and the Trustee may not, without the consent of the holder of each Outstanding Exchange Note due 2002 affected thereby, (i) extend the final maturity of the principal of any Security or reduce the principal amount thereof or reduce the rate or extend the time of payment of interest thereon, or reduce any amount payable on redemption thereof or make the principal thereof (including any amount in respect of original issue discount), or interest thereon payable in any coin or currency other than that provided in the Securities or Coupons or in accordance with the terms thereof, or reduce the amount of principal of an Original Issue Discount Security that would be due and payable upon an acceleration of the maturity thereof or the amount thereof provable in bankruptcy or alter certain provisions of the Indenture relating to Securities not denominated in Dollars or the Judgment Currency of such Securities or impair or affect the right of any Securityholder to institute suit for the enforcement of any payment thereof when due or, if the Securities provide therefor, any right of repayment at the option of the Securityholder or (ii) reduce the aforesaid percentage in principal amount of Securities of any series issued under such Indenture, the consent of the holders of which is required for any such modification. It is also provided in the Indenture that, with respect to certain defaults or Events of Default regarding the Securities of any series, the holders of a majority in aggregate principal amount Outstanding of the Securities of each such series, each such series voting as a separate class (or, of all Securities, as the case may be voting as a single class) may under certain circumstances waive all defaults with respect to each such series (or with respect to all the Securities, as the case may be) and rescind and annul a declaration of default and its consequences, but no such waiver or rescission and annulment shall extend to or affect any subsequent default or shall impair any right consequent thereto. The preceding sentence shall not, however, apply to a default in the payment of the principal of or interest on any of the Securities.

No reference herein to the Indenture and no provision of this Exchange Note due 2002 or of the Indenture shall alter or impair the obligation of the Issuer, which is absolute and unconditional, to pay the principal of and interest on this Exchange Note due 2002 at the time, place and rate, and in the coin or currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Exchange Note due 2002 may be registered on the registry books of the Issuer, upon surrender of this Exchange Note due 2002 for

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registration of transfer at the office or agency of the Issuer maintained by the Issuer for such purpose in the Borough of Manhattan, The City of New York, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Issuer and the Trustee duly executed by, the holder hereof or by its attorney duly authorized in writing, and thereupon one or more new Exchange Notes due 2002 of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Exchange Notes due 2002 are issuable only in registered form in minimum denominations of $100,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, the Exchange Notes due 2002 are exchangeable for a like aggregate principal amount of Exchange Notes due 2002 as requested by the holder surrendering the same.

No service charge shall be made for any such registration of transfer or exchange, but the Issuer may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection therewith.

Prior to due presentment of this Exchange Note due 2002 for registration of transfer, the Issuer, the Trustee and any agent of the Issuer or the Trustee may treat the person in whose name this Exchange Note due 2002 is registered as the owner hereof for all purposes, whether or not this Exchange Note due 2002 be overdue, and neither the Issuer, the Trustee nor any such agent shall be affected by notice to the contrary.

THE INDENTURE AND THIS EXCHANGE NOTE DUE 2002 SHALL BE DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF SUCH STATE, WITHOUT REGARD TO THE CONFLICTS OF LAW PRINCIPLES THEREOF.

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IN WITNESS WHEREOF, the Issuer has caused this instrument to be duly executed, manually or in facsimile, and in imprint or facsimile of its corporate seal to be imprinted hereon.

McKESSON CORPORATION

By:

Nancy A. Miller Vice President and Corporate Secretary

Attest:

By: ____________________
Name:
Title:

CERTIFICATE OF AUTHENTICATION
This is one of the Securities
referred to in the within-mentioned
Indenture.

THE FIRST NATIONAL BANK OF CHICAGO
as Trustee

By: _____________________
Authorized Officer

Dated: ___________________


ASSIGNMENT

[FORM OF ASSIGNMENT FOR EXCHANGE NOTES
THAT ARE NOT GLOBAL SECURITIES]

For value received _____________________ hereby sell(s), assign(s) and transfer(s) unto _____________________________________________________________ (Please insert social security or other taxpayer identification number of assignee.)

the within Exchange Note due 2002 and hereby irrevocably constitutes and appoints ________ attorney to transfer the said Exchange Note due 2002 on the books of the Issuer, with full power of substitution in the premises.

Dated: ____________________________



Signature(s)


Signature Guarantee/1/

NOTICE: The above signature(s) of the holder(s) hereof must correspond with the name(s) written on the face of this Exchange Note due 2002 in every particular without alteration or enlargement or any change whatsoever.


/1/ (Signature must be guaranteed by an "eligible guarantor institution," that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Securities Transfer Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)

[FORM OF SCHEDULE FOR ENDORSEMENTS ON GLOBAL SECURITIES
TO REFLECT CHANGES IN PRINCIPAL AMOUNT]

Schedule A

Changes to Principal Amount of Global Securities

            Principal Amount of
             Exchange Notes due
             2002 by which this
           Global Security is to be
             Reduced or Increased,    Remaining Principal
              and Reason for the            Amount of
  Date       Reduction or Increase   this Global Security    Notation Made By
---------    ---------------------   --------------------    ----------------

                                                                        ANNEX C

Pursuant to Section 2.3 of the Indenture, dated as of March 11, 1997 (the "Indenture"), between McKesson Corporation (the "Issuer") and The First National Bank of Chicago, a national banking association, as trustee (the "Trustee"), the terms of a series of securities to be issued pursuant to the Indenture are as follows:

1. Designation. The designation of the securities is "7.65% Exchange Debentures due March 1, 2027" (the "Exchange Debentures due 2027").

2. Aggregate Principal Amount. The Exchange Debentures due 2027 shall be limited in aggregate principal amount to $175,000,000 (except for Exchange Debentures due 2027 authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Exchange Debentures due 2027 pursuant to
Section 2.8, 2.9, 2.11, 8.5 or 12.3 of the Indenture).

3. Currency Denomination. The Exchange Debentures due 2027 shall be denominated in Dollars.

4. Maturity. The date on which the principal of the Exchange Debentures due 2027 is payable is March 1, 2027.

5. Rate of Interest; Interest Payment Date; Regular Record Dates.
Each Debenture due 2027 shall bear interest from March 1, 1997 at 7.65% per annum until the principal thereof is paid. Such interest shall be payable semiannually in arrears on March 1 and September 1 of each year, commencing on September 1, 1997, to the persons in whose names the Exchange Debentures due 2027 are registered at the close of business on the immediately preceding February 15 and August 15, respectively. Interest on the Exchange Debentures due 2027 shall accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of original issuance. Interest on the Exchange Debentures due 2027 shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which principal, premium, if any, or interest is payable on the Exchange Debentures due 2027 is not a Business

Day, then payment of the principal, premium, if any, or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of any such delay).

6. Place of Payment. Principal of, premium, if any, and interest on the Exchange Debentures due 2027 shall be payable, and the transfer of Exchange Debentures due 2027 shall be registrable, at the office or agency of the Issuer to be maintained for such purpose in the Borough of Manhattan, The City of New York, except that, at the option of the Issuer, interest may be paid by mailing a check to the address of the person entitled thereto as it appears on the Exchange Debentures due 2027 register; provided, however, that while any Exchange Debentures due 2027 are represented by a Registered Global Security, payment of principal of, premium, if any, or interest on the Exchange Debentures due 2027 may be made by wire transfer to the account of the Depositary or its nominee.

7. Optional Redemption. The Exchange Debentures due 2027 may be redeemed as a whole or in part, at the option of the Issuer, at any time at a redemption price equal to the greater of (i) 100% of their principal amount or (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Yield plus 12.5 basis points, plus accrued interest to the date of redemption. Holders of Exchange Debentures due 2027 to be redeemed will receive notice thereof by first-class mail at least 30 and not more than 60 days prior to the date fixed for redemption.

"Treasury Yield" means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date. "Comparable Treasury Issue" means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term of the Exchange Debentures due 2027 that would be utilized, at the

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time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Exchange Debentures due 2027. "Independent Investment Banker" means Morgan Stanley & Co. Incorporated or, if such firm is unwilling or unable to select the Comparable Treasury Issue, an independent investment banking institution of national standing appointed by the Trustee. "Comparable Treasury Price" means, with respect to any redemption date, (i) the average of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on the third business day preceding such redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal Reserve Bank of New York and designated "Composite 3:30
p.m. Quotations for U.S. Government Securities" or (ii) if such release (or any successor release) is not published or does not contain such prices on such business day, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (B) if the Trustee obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such Quotations. "Reference Treasury Dealer Quotations" means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Trustee, of the bid and asked prices of the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m. on the third business day preceding such redemption date. "Reference Treasury Dealer" means each of Morgan Stanley & Co. Incorporated, BancAmerica Securities, Inc., Chase Securities Inc. and J.P. Morgan Securities Inc., and their respective successors; provided however, that if any of the foregoing shall cease to be a primary U.S. Government Securities dealer in New York City (a "Primary Treasury Dealer"), the Issuer shall substitute therefor another Primary Treasury Dealer.

8. Mandatory Redemption. The Exchange Debentures due 2027 are not mandatorily redeemable and are not entitled to the benefit of a sinking fund or any analogous provisions.

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9. Denominations. The Exchange Debentures due 2027 shall be issued initially in minimum denominations of $100,000 and shall be issued in integral multiples of $1,000 in excess thereof.

10. Amount Payable Upon Acceleration. The principal of the Exchange Debentures due 2027 shall be payable upon declaration of acceleration pursuant to Section 5.1 of the Indenture.

11. Payment Currency. Principal and interest on the Exchange Debentures due 2027 shall be payable in Dollars.

12. Payment Currency - Election. The principal of and interest on the Exchange Debentures due 2027 shall not be payable in a currency other than Dollars.

13. Payment Currency - Index. The principal of and interest on the Exchange Debentures due 2027 shall not be determined with reference to an index based on a coin or currency.

14. Registered Securities. The Exchange Debentures due 2027 shall be issuable as Registered Securities. The Exchange Debentures due 2027 may be issued as Registered Global Securities.

15. Additional Amounts. The Issuer shall not pay additional amounts on the Exchange Debentures due 2027 held by a Person that is not a U.S. Person in respect of taxes or similar charges withheld or deducted.

16. Definitive Certificates. Section 2.8 of the Indenture will govern the transferability of Exchange Debentures due 2027 in definitive form.

17. Registrar; Paying Agent; Depositary. The Trustee shall initially serve as the registrar and the paying agent for the Exchange Debentures due 2027. The Depository Trust Company shall initially serve as the Depositary for the Registered Global Securities representing Exchange Debentures due 2027.

18. Events of Default; Covenants. There shall be no deletions from, modifications or additions to the Events of Default set forth in
Section 5.1 of the Indenture with respect to the Exchange

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Debentures due 2027. There shall be the following additions to the covenants of the Issuer set forth in Article III with respect to the Exchange Debentures due 2027:

Limitation on Liens. The Issuer covenants that, so long as any of the Exchange Debentures due 2027 remain outstanding, it shall not, nor shall it permit any Consolidated Subsidiary to, create or assume any Indebtedness for money borrowed which is secured by a mortgage, pledge, security interest or lien ("liens") of or upon any assets, whether now owned or hereafter acquired, of the Issuer or any such Consolidated Subsidiary without equal and ratably securing the Exchange Debentures due 2027 by a lien ranking ratably with and equal to (or at the option of the Issuer, senior to) such secured Indebtedness, except that the foregoing restriction shall not apply to (a) liens on any assets of any corporation existing at the time such corporation becomes a Consolidated Subsidiary; (b) liens on any assets existing at the time of acquisition of such assets by the Issuer or a Consolidated Subsidiary, or liens to secure the payment of all or any part of the purchase price of such assets upon the acquisition of such assets by the Issuer or a Consolidated Subsidiary or to secure any indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary prior to, at the time of, or within 360 days after such acquisition (or in the case of real property, the completion of construction (including any improvements on an existing asset) or commencement of full operation of such asset, whichever is later) which indebtedness is incurred or guaranteed for the purpose of financing all or any part of the purchase price thereof or, in the case of real property, construction or improvements thereon; provided, however, that in the case of any such acquisition, construction or improvement, the lien shall not apply to any assets theretofore owned by the Issuer or a Consolidated Subsidiary, other than, in the case of any such construction or improvement, any real property on which the property so constructed, or the improvement, is located, or to secure the payment of the purchase price of such assets, or to secure indebtedness incurred or guaranteed by the Issuer or a Consolidated Subsidiary for the purpose of financing the purchase price of such assets or improvements or construction thereon, which indebtedness is incurred or guaranteed prior to, at the time of or within 360 days after such acquisition (or in the case of real property, completion of such improvement or construction or

5

commencement of full operation of such property, whichever is later); (c) liens on any assets securing indebtedness owed by any Consolidated Subsidiary to the Issuer or another wholly owned Subsidiary; (d) liens on any assets of a corporation existing at the time such corporation is merged into or consolidated with the Issuer or a Subsidiary or at the time of a purchase, lease or other acquisition of the assets of a corporation or firm as an entirety or substantially as an entirety by the Issuer or a Subsidiary; (e) liens on any assets of the Issuer or a Consolidated Subsidiary in favor of the United States of America or any state thereof, or any department, agency or instrumentality or political subdivision of the United States of America or any State thereof, or in favor of any other country, or any political subdivision thereof, to secure partial, progress, advance or other payments pursuant to any contract or statute or to secure any indebtedness incurred or guaranteed for the purpose of financing all or any part of the purchase price (or, in the case of real property, the cost of construction) of the assets subject to such liens (including, but not limited to, liens incurred in connection with pollution control, industrial revenue or similar financing); (f) any extension, renewal or replacement (or successive extensions, renewals or replacements) in whole or in part, of any lien referred to in the foregoing clauses (a) to (e), inclusive; provided, however, that the principal amount of indebtedness secured thereby shall not exceed the principal amount of indebtedness so secured at the time of such extension, renewal or replacement, and that such extension, renewal or replacement shall be limited to all or a part of the assets which secured the lien so extended, renewed or replaced
(plus improvements and construction on such real property); (g)
liens imposed by law, such as mechanics', workmen's, repairmen's, materialmen's, carriers', warehousemen's, vendors' or other similar liens arising in the ordinary course of business, or governmental (federal, state or municipal) liens arising out of contracts for the sale of products or services by the Issuer or any Consolidated Subsidiary, or deposits or pledges to obtain the release of any of the foregoing liens; (h) pledges, liens or deposits under worker's compensation laws or similar legislation and liens or judgments thereunder which are not currently dischargeable, or in connection with bids, tenders, contracts (other than for the payment of money) or leases to which the Issuer or any Consolidated Subsidiary is a party, or to secure public or statutory obligations of the Issuer or any Consolidated

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Subsidiary, or in connection with obtaining or maintaining self- insurance or to obtain the benefits of any law, regulation or arrangement pertaining to unemployment insurance, old age pensions, social security or similar matters, or to secure surety, appeal or customs bonds to which the Issuer or any Consolidated Subsidiary is a party, or in litigation or other proceedings such as, but not limited to, interpleader proceedings, and other similar pledges, liens or deposits made or incurred in the ordinary course of business; (i) liens created by or resulting from any litigation or other proceeding which is being contested in good faith by appropriate proceedings, including liens arising out of judgements or awards against the Issuer or any Consolidated Subsidiary with respect to which the Issuer or such Consolidated Subsidiary is in good faith prosecuting an appeal or proceedings for review or for which the time to make an appeal has not yet expired; or final unappealable judgment liens which are satisfied within 15 days of the date of judgment; or liens incurred by the Issuer or any Consolidated Subsidiary for the purpose of obtaining a stay or discharge in the course of any litigation or other proceeding to which the Issuer or such Consolidated Subsidiary is a party; or (j) liens for taxes or assessments or governmental charges or levies not yet due or delinquent, or which can thereafter be paid without penalty, or which are being contested in good faith by appropriate proceedings; landlord's liens on property held under lease; and any other liens or charges incidental to the conduct of the business of the Issuer or any Consolidated Subsidiary or the ownership of the assets of any of them which were not incurred in connection with the borrowing of money or the obtaining of advances or credit and which do not, in the opinion of the Issuer, materially impair the use of such assets in the operation of the business of the Issuer or such Consolidated Subsidiary or the value of such assets for the purposes thereof. Notwithstanding the above, the Issuer or any Consolidated Subsidiary may, without securing the Exchange Debentures due 2027, create or assume any Indebtedness which is secured by a lien which would otherwise be subject to the foregoing restrictions, provided that at the time of such creation or assumption, after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

7

Limitation on Sale and Lease-Back Transactions. The Issuer covenants that, so long as any of the Exchange Debentures due 2027 remain outstanding, it will not, nor shall it permit any Consolidated Subsidiary to, enter into any sale and lease-back transactions with respect to any assets, other than any sale leaseback transaction (involving leases for a term of not more than three years), unless either (a) the Issuer or such Consolidated Subsidiary would be entitled to incur Indebtedness secured by a lien on the assets to be leased in an amount at least equal to the Attributable Debt in respect of such transaction without equally and ratably securing the Exchange Debentures due 2027 pursuant to clauses (a) through (j) inclusive of the covenant with respect to "Limitation on Liens" above, or
(b) the proceeds of the sale of the assets to be leased are at least equal to their fair market value (as determined by the Board of Directors of the Issuer) and the proceeds are applied to the purchase or acquisition (or, in the case of real property, the construction) of assets or to the retirement (other than at maturity or pursuant to a mandatory sinking fund or mandatory redemption provision) of indebtedness. The foregoing limitation shall not apply, if at the time the Issuer or any Consolidated Subsidiary enters into such sale and lease-back transaction, and after giving effect thereto, Exempted Debt does not exceed 10% of the total assets of the Issuer and its Subsidiaries on a consolidated basis, determined in accordance with generally accepted accounting principles.

The term "Attributable Debt" in connection with a sale and lease- back transaction shall mean, as of the date of determination, the lesser of (a) the fair value of the assets subject to such transaction or (b) the present value (discounted at the rate of interest set forth in or implicit in the terms of such lease or, if it is not practicable to determine such rate, the weighted average interest rate per annum borne by all series of Securities then Outstanding and subject to the Limitation on Sale and Leaseback Transactions and compounded semiannually, in either case as determined by the principal accounting or financial officer of the Issuer) of the obligations of the Issuer or any Consolidated Subsidiary for net rental payments during the remaining term of all leases (including any period for which such lease has been extended or may, at the option of the lessor, be extended). The term "net rental payments" under any lease of any period shall mean the sum of the rental and

8

other payments required to be paid in such period by the lessee thereunder, not including, however, any amounts required to be paid by such lessee (whether or not designated as rental or additional rental) on account of maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges required to be paid by such lessee thereunder or any amounts required to be paid by such lessee thereunder contingent upon the amount of sales, maintenance and repairs, reconstruction, insurance, taxes, assessments, water rates or similar charges. The term "Consolidated Subsidiary" shall mean any Subsidiary substantially all the property of which is located, and substantially all the operations of which are conducted, in the United States of America whose financial statements are consolidated with those of the Issuer in accordance with generally accepted accounting principles. The term "Exempted Debt" shall mean the sum of the following as of the date of determination: (i) Indebtedness of the Issuer and its Consolidated Subsidiaries incurred after the date of the Indenture and secured by liens not permitted to be created or assumed pursuant to the covenant with respect to "Limitation on Liens" above, and (ii) Attributable Debt of the Issuer and its Consolidated Subsidiaries in respect of every sale and lease-back transaction entered into after the date of the Indenture, other than leases permitted by this covenant with respect to "Limitation on Sale and Lease-Back Transactions" above. The term "Indebtedness" shall mean all items classified as indebtedness on the most recently available consolidated balance sheet of the Issuer and its Consolidated Subsidiaries, in accordance with generally accepted accounting principles.

19. Conversion and Exchange. The Exchange Debentures due 2027 shall not by their terms be convertible into or exchangeable for any other security.

20. Other Terms. The Exchange Debentures due 2027 shall have the other terms and shall be substantially in the form set forth in the form of Exchange Debentures due 2027 attached hereto as Exhibit A. In case of any conflict between this Annex C and the Exchange Debentures due 2027 in the form attached hereto as Exhibit A, the form of the Exchange Debentures due 2027 shall control.

9

Capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Indenture.

10

EXHIBIT A

[FORM OF FACE OF EXCHANGE DEBENTURE DUE MARCH 1, 2027]

[IF THE EXCHANGE DEBENTURE DUE 2027 IS TO BE A GLOBAL SECURITY, INSERT

THE FOLLOWING - - THIS EXCHANGE DEBENTURE DUE 2027 IS A BOOK-ENTRY SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE OF A DEPOSITARY. THIS EXCHANGE DEBENTURE DUE 2027 IS EXCHANGEABLE FOR EXCHANGE DEBENTURES DUE 2027 REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS EXCHANGE DEBENTURE DUE 2027 (OTHER THAN A TRANSFER OF THIS EXCHANGE DEBENTURE DUE 2027) AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY) MAY BE REGISTERED EXCEPT IN SUCH LIMITED CIRCUMSTANCES.

UNLESS THIS EXCHANGE DEBENTURE DUE 2027 IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY EXCHANGE DEBENTURE DUE 2027 ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT HEREON IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

No. __________ CUSIP NO. ________

MCKESSON CORPORATION

7.65% EXCHANGE DEBENTURE DUE MARCH 1, 2027

McKesson Corporation, a Delaware corporation (the "Issuer," which term includes any successor corporation under the Indenture hereinafter referred to),


for value received, hereby promises to pay to _______________________________, the principal sum of _____________________________ Dollars ($______________) on March 1, 2027 and to pay interest on said principal sum from March 1, 1997, or from the most recent interest payment date to which interest has been paid or duly provided for, semiannually in arrears on March 1 and September 1 (each such date, an "Interest Payment Date") of each year commencing on September 1, 1997, at the rate of 7.65% per annum until the principal hereof shall have become due and payable.

The amount of interest payable on any Interest Payment Date shall be computed on the basis of a 360-day year comprised of twelve 30-day months. The amount of interest payable for any period shorter than a full semi-annual period for which interest is computed, will be computed on the basis of the actual number of days elapsed per 30-day month. In the event that any date on which the principal, premium, if any, or interest payable on this Exchange Debenture due 2027 is not a Business Day, then payment of principal, premium, if any, or interest payable on such date will be made on the next succeeding day that is a Business Day (and without any interest or other payment in respect of such delay). The interest installment so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture (referred to on the reverse hereof) be paid to the person in whose name this Exchange Debenture due 2027 is registered at the close of business on the record date for such interest installment, which shall be the close of business on the immediately preceding February 15 and August 15 prior to such Interest Payment Date, as applicable. Any such interest installment not punctually paid or duly provided for shall forthwith cease to be payable to the registered holders on such record date and may be paid to the person in whose name this Exchange Debenture due 2027 is registered at the close of business on a subsequent record date (which shall be not less than five Business Days prior to the date of payment of such defaulted interest), notice whereof shall be given by mail by or on behalf of the Issuer to the registered holders of Exchange Debentures due 2027 not less than 15 days preceding such subsequent record date, all as more fully provided for in the Indenture. The principal of, preimum, if any, and the interest on this Exchange Debenture due 2027 shall be payable at the office or agency of the Issuer maintained for that purpose in any coin or currency of the United States of America that at the time of payment is legal tender for payment of public and private debts; provided, however, that payment of interest may be made at the option of the Issuer by check mailed to the person entitled thereto at such address as shall appear in the registry books of the Issuer; provided, further that for so long as this Exchange Debenture due 2027 is represented by a Registered Global Security, payment of principal, premium, if any, or interest on this Exchange Debenture due

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2027 may be made by wire transfer to the account of the Depositary or its nominee.

Unless the certificate of authentication hereon has been executed by or on behalf of the Trustee (as defined below) under the Indenture, by the manual signature of one of its authorized officers, this Exchange Debenture due 2027 shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

Capitalized terms used in this Exchange Debenture due 2027 which are defined in the Indenture shall have the respective meanings assigned to them in the Indenture.

The provisions of this Exchange Debenture due 2027 are continued on the reverse side hereof and such continued provisions shall for all purposes have the same effect as though fully set forth at this place.

[FORM OF REVERSE SIDE OF EXCHANGE DEBENTURE]

This Exchange Debenture due 2027 is one of a duly authorized series of securities (the "Securities") of the Issuer designated as its 7.65% Exchange Debentures due March 1, 2027 (the "Exchange Debentures due 2027"). The Securities are all issued or to be issued under and pursuant to an Indenture, dated as of March 11, 1997 (the "Indenture"), duly executed and delivered between the Issuer and The First National Bank of Chicago, a national banking association (the "Trustee," which term includes any successor Trustee with respect to the Securities under the Indenture), to which the Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights thereunder of the Issuer, the Trustee and the holders of the Securities and the terms upon which the Exchange Debentures due 2027 are to be authenticated and delivered. The terms of individual series of Securities may vary with respect to interest rate or interest rate formulas, issue dates, maturity, redemption, repayment, currency of payment and otherwise.

Except as set forth below, this Exchange Debenture due 2027 is not redeemable and is not entitled to the benefit of a sinking fund or any analogous provision.

This Exchange Debenture due 2027 is redeemable as a whole or in part, at the option of the Issuer, at any time at a redemption price equal to the

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greater of (i) 100% of its principal amount or (ii) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Yield plus 12.5 basis points, plus accrued interest to the date of redemption. The Holder of this Exchange Debenture due 2027 will receive notice thereof by first-class mail at least 30 and not more than 60 days prior to the date fixed for redemption.

"Treasury Yield" means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date. "Comparable Treasury Issue" means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term of the Exchange Debentures due 2027 that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Exchange Debentures due 2027. "Independent Investment Banker" means Morgan Stanley & Co. Incorporated or, if such firm is unwilling or unable to select the Comparable Treasury Issue, an independent investment banking institution of national standing appointed by the Trustee. "Comparable Treasury Price" means, with respect to any redemption date, (i) the average of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) on the third business day preceding such redemption date, as set forth in the daily statistical release (or any successor release) published by the Federal Reserve Bank of New York and designated "Composite 3:30 p.m. Quotations for U.S. Government Securities" or (ii) if such release (or any successor release) is not published or does not contain such prices on such business day, (A) the average of the Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (B) if the Trustee obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such Quotations. "Reference Treasury Dealer Quotations" means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Trustee, of the bid and asked prices of the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m. on the third business day preceding such redemption date. "Reference Treasury Dealer" means each of Morgan Stanley & Co. Incorporated, BancAmerica Securities, Inc., Chase Securities Inc. and J.P. Morgan Securities, Inc., and their respective successors; provided, however, that if any of the foregoing shall cease to be a primary

4

U.S. Government Securities dealer in New York City (a "Primary Treasury Dealer"), the Issuer shall substitute therefor another Primary Treasury Dealer.

If an Event of Default with respect to the Exchange Debentures due 2027 shall occur and be continuing, the principal of all the Exchange Debentures due 2027 may be declared due and payable in the manner and with the effect provided in the Indenture.

The Indenture contains provisions permitting the Issuer and the Trustee, with the consent of the holders of not less than a majority in aggregate principal amount of the Securities of all series issued under such Indenture then outstanding and affected (voting as one class) to add any provisions to, or change in any manner or eliminate any of the provisions of, such Indenture or modify in any manner the rights of the holders of the Securities of each series or Coupons so affected; provided that the Issuer and the Trustee may not, without the consent of the holder of each Outstanding Exchange Debenture due 2027 affected thereby, (i) extend the final maturity of the principal of any Security or reduce the principal amount thereof or reduce the rate or extend the time of payment of interest thereon, or reduce any amount payable on redemption thereof or make the principal thereof (including any amount in respect of original issue discount), or interest thereon payable in any coin or currency other than that provided in the Securities or Coupons or in accordance with the terms thereof, or reduce the amount of principal of an Original Issue Discount Security that would be due and payable upon an acceleration of the maturity thereof or the amount thereof provable in bankruptcy or alter certain provisions of the Indenture relating to Securities not denominated in Dollars or the Judgment Currency of such Securities or impair or affect the right of any Securityholder to institute suit for the enforcement of any payment thereof when due or, if the Securities provide therefor, any right of repayment at the option of the Securityholder or (ii) reduce the aforesaid percentage in principal amount of Securities of any series issued under such Indenture, the consent of the holders of which is required for any such modification. It is also provided in the Indenture that, with respect to certain defaults or Events of Default regarding the Securities of any series, the holders of a majority in aggregate principal amount Outstanding of the Securities of each such series, each such series voting as a separate class (or, of all Securities, as the case may be voting as a single class) may under certain circumstances waive all defaults with respect to each such series (or with respect to all the Securities, as the case may be) and rescind and annul a declaration of default and its consequences, but no such waiver or rescission and annulment shall extend to or affect any subsequent default or shall impair any right consequent thereto. The preceding sen-

5

tence shall not, however, apply to a default in the payment of the principal of or interest on any of the Securities.

No reference herein to the Indenture and no provision of this Exchange Debenture due 2027 or of the Indenture shall alter or impair the obligation of the Issuer, which is absolute and unconditional, to pay the principal of and interest on this Exchange Debenture due 2027 at the time, place and rate, and in the coin or currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Exchange Debenture due 2027 may be registered on the registry books of the Issuer, upon surrender of this Exchange Debenture due 2027 for registration of transfer at the office or agency of the Issuer maintained by the Issuer for such purpose in the Borough of Manhattan, The City of New York, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Issuer and the Trustee duly executed by, the holder hereof or by its attorney duly authorized in writing, and thereupon one or more new Exchange Debentures due 2027 of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Exchange Debentures due 2027 are issuable only in registered form in minimum denominations of $100,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, the Exchange Debentures due 2027 are exchangeable for a like aggregate principal amount of Exchange Debentures due 2027 as requested by the holder surrendering the same.

No service charge shall be made for any such registration of transfer or exchange, but the Issuer may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection therewith.

Prior to due presentment of this Exchange Debenture due 2027 for registration of transfer, the Issuer, the Trustee and any agent of the Issuer or the Trustee may treat the person in whose name this Exchange Debenture due 2027 is registered as the owner hereof for all purposes, whether or not this Exchange Debenture due 2027 be overdue, and neither the Issuer, the Trustee nor any such agent shall be affected by notice to the contrary.

THE INDENTURE AND THIS EXCHANGE DEBENTURE DUE 2027 SHALL BE DEEMED TO

BE A CONTRACT UNDER THE LAWS OF THE

6

STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF SUCH STATE, WITHOUT REGARD TO THE CONFLICTS OF LAW PRINCIPLES THEREOF.

7

IN WITNESS WHEREOF, the Issuer has caused this instrument to be duly executed, manually or in facsimile, and an imprint or facsimile of its corporate seal to be imprinted hereon.

McKESSON CORPORATION

By:

Nancy A. Miller Vice President and Corporate Secretary

Attest:

By: ____________________
Name:
Title:

CERTIFICATE OF AUTHENTICATION
This is one of the Securities
referred to in the within-mentioned
Indenture.

THE FIRST NATIONAL BANK OF CHICAGO
as Trustee

By: _____________________
Authorized Officer

Dated: ___________________


ASSIGNMENT

[FORM OF ASSIGNMENT FOR EXCHANGE DEBENTURES
THAT ARE NOT GLOBAL SECURITIES]

For value received _____________________ hereby sell(s), assign(s) and transfer(s) unto _________________________
(Please insert social security or other taxpayer identification number of assignee.)

the within Exchange Debenture due 2027 and hereby irrevocably constitutes and appoints ________ attorney to transfer the said Exchange Debenture due 2027 on the books of the Issuer, with full power of substitution in the premises.

Dated: ____________________________



Signature(s)


Signature Guarantee/1/

NOTICE: The above signature(s) of the holder(s) hereof must correspond with the name(s) written on the face of this Exchange Debenture due 2027 in every particular without alteration or enlargement or any change whatsoever.


/1/ (Signature must be guaranteed by an "eligible guarantor institution," that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Securities Transfer Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)

[FORM OF SCHEDULE FOR ENDORSEMENTS ON GLOBAL SECURITIES
TO REFLECT CHANGES IN PRINCIPAL AMOUNT]

Schedule A

Changes to Principal Amount of Global Securities

                Principal Amount of
             Exchange Debentures due
               2027 by which this
             Global Security is to be
               Reduced or Increased,  Remaining Principal
               and Reason for the          Amount of
  Date         Reduction or Increase  this Global Security  Notation Made By
---------      ---------------------  --------------------  ----------------


EXHIBIT 8.1

[SKADDEN, ARPS, SLATE, MEAGHER & FLOM LLP]

July 8, 1997

McKesson Corporation
McKesson Plaza
One Post Street
San Francisco, CA 94104

Ladies and Gentlemen:

We have acted as special counsel to McKesson Corporation, a Delaware corporation (the "Company"), in connection with the preparation of the Registration Statement on Form S-4 (such Registration Statement being hereinafter referred to as the "Registration Statement"), to be filed by the Company with the Securities and Exchange Commission (the "Commission") on the date hereof, with respect to the registration under the Securities Act of 1933, as amended (the "Securities Act"), by the Company of its offers to exchange (the "Exchange Offers") an aggregate principal amount of up to $525,000,000 of its 6.60% Exchange Notes due March 1, 2000, 6 7/8% Exchange Notes due March 1, 2002 and 7.65% Exchange Debentures due March 1, 2027 (together the "Exchange Notes") for a like principal amount of 6.60% Notes due March 1, 2000, 6 7/8% Notes due March 1, 2002 and 7.65% Debentures due March 1, 2027 (together the "Private Notes"). The Private Notes have been and the Exchange Notes will be issued pursuant to an Indenture dated as of March 11, 1997 (the "Indenture"), between the Company and The First National Bank of Chicago, as trustee (the "Trustee").

We hereby confirm that, although the discussion set forth in the Registration Statement under the heading "CERTAIN UNITED STATES FEDERAL TAX CONSEQUENCES TO NON-U.S. HOLDERS" does not purport to discuss all possible United States federal income tax consequences of the acquisition, ownership, and disposition of the Exchange Notes, in our opinion such discussion constitutes, in all material respects, a fair and accurate summary of the United States federal income tax consequences of the acquisition, ownership, and disposition of the Exchange Notes, based upon current law. There can be no assurances that any of the opin-


McKesson Corporation
July 8, 1997

Page 2

ions expressed herein will be accepted by the Internal Revenue Service, or if challenged, by a court.

We hereby consent to the filing of this opinion with the Commission as Exhibit 8.1 to the Registration Statement. We also consent to the use of our name under the heading "Legal Matters" in the Registration Statement. In giving this consent, we do not thereby admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission promulgated thereunder. This opinion is expressed as of the date hereof unless otherwise expressly stated and we disclaim any undertaking to advise you of any subsequent changes of the facts stated or assumed herein or any subsequent changes in applicable law.

Very truly yours,

/s/ Skadden, Arps, Slate, Meagher & Flom LLP


EXHIBIT 10.1

McKESSON CORPORATION

$175,000,000 6.60% Notes due March 1, 2000 $175,000,000 6 7/8% Notes due March 1, 2002 $175,000,000 7.65% Debentures due March 1, 2027

REGISTRATION RIGHTS AGREEMENT

New York, New York
March 11, 1997

Morgan Stanley & Co. Incorporated
BancAmerica Securities, Inc.
Chase Securities Inc.
J.P. Morgan Securities Inc.

c/o  Morgan Stanley & Co.
          Incorporated
     1585 Broadway
     New York,  New York 10036

Dear Sirs and Mesdames:

McKesson Corporation, a Delaware corporation (the "Company"), proposes to issue and sell (the "Initial Placement") to Morgan Stanley & Co. Incorporated ("Morgan Stanley"), BancAmerica Securities, Inc., Chase Securities Inc. and J.P. Morgan Securities Inc. (the "Purchasers"), upon the terms set forth in a placement agreement of even date herewith (the "Placement Agreement"), $175,000,000 of the Company's 6.60% Notes due March 1, 2000, $175,000,000 of the Company's 6 7/8% Notes due March 1, 2002 and $175,000,000 of the Company's 7.65% Debentures due March 1, 2027 (each, a "Series of Notes" and, collectively, the "Notes"). The Notes will be issued under an Indenture to be dated as of March 11, 1997 (the "Indenture") between the Company and The First National Bank of Chicago, as trustee (the "Trustee"). As an inducement to the Purchasers to enter into the Placement Agreement and in satisfaction of a condition to your obligations thereunder, the Company agrees with you, (i) for your benefit and
(ii) for the benefit of the holders from time to time (each of the foregoing a "Holder" and together the "Holders") of the Notes or the Exchange Notes (as defined herein), as follows:

1. Definitions. Capitalized terms used herein without definition shall have their respective meanings set forth in the Placement Agreement. As used in this Agreement, the following capitalized defined terms shall have the following meanings:

"Act" means the Securities Act of 1933, as amended, and the rules and

regulations of the Commission promulgated thereunder.

"Affiliate" shall have the same meaning given to that term in Rule 405 of the Act or any successor rule thereunder.

"Closing Date" has the meaning set forth in the Placement Agreement.

"Commission" means the Securities and Exchange Commission.

"Exchange Act" means the Securities Exchange Act of 1934, as amended, and the rules and regulations of the Commission promulgated thereunder.

"Exchange Notes" means the three Series of Exchange Notes, collectively.

"Exchange Offer Registration Period" means the 180-day period following the issuance of the Exchange Notes, exclusive of any period during which any stop order shall be in effect suspending the effectiveness of the Exchange Offer Registration Statement.

"Exchange Offer Registration Statement" means a registration statement of the Company on an appropriate form under the Act with respect to the Registered Exchange Offer, and all amendments and supplements to such registration statement, including post-effective amendments, in each case including the Prospectus contained therein, all exhibits thereto and all material incorporated by reference therein.

"Exchanging Dealer" means any Holder (which may include any Purchaser) which is a broker-dealer electing to exchange Notes acquired for its own account as a result of market-making activities or other trading activities for Exchange Notes.

"Final Memorandum" has the meaning set forth in the Placement Agreement.

"Holder" has the meaning set forth in the preamble hereto.

"Indenture" has the meaning set forth in the preamble hereto.

"Initial Placement" has the meaning set forth in the preamble hereto.

"Liquidated Damages" has the meaning set forth in Section 7(a) hereof.

2

"Majority Holders" means the Holders of a majority of the aggregate principal amount of securities registered under a Registration Statement.

"Managing Underwriters" means the investment banker or investment bankers and manager or managers that shall administer an underwritten offering.

"Notes" has the meaning set forth in the preamble hereto.

"Prospectus" means the prospectus included in any Registration Statement (including a prospectus that discloses information previously omitted from a prospectus filed as part of an effective registration statement in reliance upon Rule 430A under the Act), as amended or supplemented by any prospectus supplement, with respect to the terms of the offering of any portion of the Notes or the Exchange Notes, covered by such Registration Statement, and all amendments and supplements to the Prospectus, including post-effective amendments.

"Registered Exchange Offer" means the proposed offer to the Holders to issue and deliver to such Holders, with respect to each Series of Notes, a like principal amount of the corresponding Series of Exchange Notes, in exchange for the Notes.

"Registration Statement" means any Exchange Offer Registration Statement or Shelf Registration Statement that covers any of the Notes or the Exchange Notes pursuant to the provisions of this Agreement, and amendments and supplements to such registration statement, including post-effective amendments, in each case including the Prospectus contained therein, all exhibits thereto and all material incorporated by reference therein.

"Series of Exchange Notes" means, in respect of each Series of Notes, a like principal amount of debt securities of the Company identical in all material respects to, and entitled to substantially the same benefits of, such Series of Notes.

"Series of Notes" has the meaning set forth in the preamble hereto.

"Shelf Registration" means a registration effected pursuant to Section 3 hereof.

"Shelf Registration Event" has the meaning set forth in Section 3 hereof.

"Shelf Registration Period" has the meaning set forth in Section 3(b) hereof.

"Shelf Registration Statement" means a "shelf" registration statement of the Company pursuant to the provisions

3

of Section 3 hereof which covers some or all of the Notes or the Exchange Notes, as applicable, on an appropriate form under Rule 415 under the Act, or any similar rule that may be adopted by the Commission, and amendments and supplements to such registration statement, including post-effective amendments, in each case including the Prospectus contained therein, all exhibits thereto and all material incorporated by reference therein.

"Special Counsel" means Brown & Wood llp or such other counsel as shall be specified by the Majority Holders of securities included in the relevant Registration Statement, the fees and expenses of which will be paid by the Company pursuant to Section 5 hereof.

"Trustee" has the meaning set forth in the preamble hereto.

"Underwriter" means any underwriter of Notes in connection with an offering thereof under a Shelf Registration Statement.

2. Registered Exchange Offer; Resales of Exchange Notes by
Exchanging Dealers. (a) The Company shall prepare and, not later than 120 days following the Closing Date, shall file with the Commission the Exchange Offer Registration Statement. The Company shall use its reasonable best efforts to cause the Exchange Offer Registration Statement to become effective under the Act within 180 days of the Closing Date.

(b) Upon the effectiveness of the Exchange Offer Registration Statement, the Company shall promptly commence the Registered Exchange Offer, it being the objective of such Registered Exchange Offer to enable each Holder electing to exchange Notes for Exchange Notes (assuming that such Holder is not an affiliate of the Company within the meaning of the Act, acquires the Exchange Notes in the ordinary course of such Holder's business and has no arrangements with any person to participate in the distribution (within the meaning of the Act) of the Exchange Notes) to transfer such Exchange Notes from and after their receipt without any limitations or restrictions under the Act and without material restrictions under the securities laws of a substantial proportion of the several states of the United States.

(c) In connection with the Registered Exchange Offer, the Company shall:

(i) mail to each Holder a copy of the Prospectus forming part of the Exchange Offer Registration Statement, together with an appropriate letter of transmittal and related documents;

4

(ii) keep the Registered Exchange Offer open for not less than 30 days after the date notice thereof is mailed to the Holders (or longer if required by applicable law);

(iii) utilize the services of a depositary for the Registered Exchange Offer with an address in the Borough of Manhattan, The City of New York; and

(iv) comply in all material respects with all applicable laws.

(d) As soon as practicable after the close of the Registered Exchange Offer, the Company shall:

(i) accept for exchange all Notes validly tendered and not withdrawn pursuant to the Registered Exchange Offer;

(ii) deliver to the Trustee for cancellation all Notes so accepted for exchange; and

(iii) cause the Trustee promptly to authenticate and deliver to each Holder of tendered Notes, Exchange Notes of the appropriate series equal in principal amount to the Notes of such Holder so accepted for exchange therefor.

(e) The Purchasers and the Company acknowledge that, pursuant to interpretations by the Commission's staff of Section 5 of the Act, and in the absence of an applicable exemption therefrom, each Exchanging Dealer is required to deliver a Prospectus in connection with a sale of any Exchange Notes received by such Exchanging Dealer pursuant to the Registered Exchange Offer in exchange for Notes acquired for its own account as a result of market-making activities or other trading activities. Accordingly, the Company shall:

(i) include the information set forth in Annex A hereto on the cover of the Exchange Offer Registration Statement, in Annex B hereto in the forepart of the Exchange Offer Registration Statement in a section setting forth details of the Registered Exchange Offer, and in Annex C hereto in the underwriting or plan of distribution section of the Prospectus forming a part of the Exchange Offer Registration Statement, and include the information set forth in Annex D hereto in the Letter of Transmittal delivered pursuant to the Registered Exchange Offer; and

(ii) use its reasonable best efforts to keep the Exchange Offer Registration Statement continuously effective under the Act during the Exchange Offer Registration Period for delivery of the Prospectus forming a part thereof by Exchanging Dealers in connection with sales of Exchange Securities received pursuant to the Registered Exchange Offer, as contemplated by Section 4(h) below.

5

(f) In the event that the Purchasers determine that they are not eligible to participate in the Registered Exchange Offer with respect to the exchange of Notes constituting any portion of their initial unsold allotment, at the request of the Purchasers, the Company shall issue and deliver to the Purchasers, in exchange for such Notes, a like principal amount of Exchange Notes (provided that such Exchange Notes shall include legends with respect to restrictions on transfer), and the Company shall, starting on the date of effectiveness of the Exchange Offer Registration Statement and ending on the close of business on the 180th day following such date, make available as many copies of the Exchange Offer Registration Statement prospectus, as amended or supplemented, as reasonably requested by the Purchasers. The Company shall seek to cause the CUSIP Service Bureau to issue the same CUSIP number(s) for such securities as for the corresponding Series of Exchange Notes issued pursuant to the Registered Exchange Offer. The Purchasers agree to promptly notify the Company in writing following the resale of their initial allotment of Notes.

3. Shelf Registration. If, (i) because of any change in law or currently prevailing interpretations thereof by the Commission's staff, the Company determines upon advice of its outside counsel that it is not permitted to effect the Registered Exchange Offer as contemplated by Section 2 hereof, or
(ii) for any other reason the Registered Exchange Offer is not consummated within 225 days of the Closing Date, or (iii) in the case of any Holder that participates in the Registered Exchange Offer, such Holder does not receive freely tradeable Exchange Notes on the date of the exchange (other than due solely to the status of such Holder as an affiliate of the Company within the meaning of the Act or as a broker-dealer) (it being understood that, for purposes of this Section 3, (x) the requirement that the Purchasers deliver a Prospectus containing the information required by Items 507 and/or 508 of Regulation S-K under the Act in connection with sales of Exchange Notes acquired in exchange for such Notes shall result in such Exchange Notes being not "freely tradeable" but (y) the requirement that an Exchanging Dealer deliver a Prospectus in connection with sales of Exchange Notes acquired in the Registered Exchange Offer in exchange for Notes acquired as a result of market-making activities or other trading activities shall not result in such Exchange Notes being not "freely tradeable") (the events described in clauses (i), (ii) and
(iii) of this paragraph are each referred to herein as a "Shelf Registration Event"), the following provisions shall apply:

(a) The Company shall promptly deliver to the Holders written notice of a Shelf Registration Event and, as promptly as practicable (but in no event more than 60 days after so required or requested pursuant to this Section 3), file with the Commission and thereafter use its reasonable best efforts to cause to be declared effective under the Act, a Shelf Registration Statement relating to the offer and sale of the Notes or the Exchange Notes, as applicable, by the Holders from time to

6

time in accordance with the methods of distribution elected by such Holders and set forth in such Shelf Registration Statement; provided, however, that with respect to Exchange Notes received by the Purchasers in exchange for Notes constituting any portion of an unsold allotment, the Company may, if permitted by current interpretations by the Commission's staff, file a post-effective amendment to the Exchange Offer Registration Statement containing the information required by Regulation S-K Items 507 and/or 508, as applicable, in satisfaction of their obligations under this paragraph (a) with respect thereto, and any such Exchange Offer Registration Statement, as so amended, shall be referred to herein as, and governed by the provisions herein applicable to, a Shelf Registration Statement.

(b) The Company shall use its reasonable best efforts to keep the Shelf Registration Statement continuously effective in order to permit the Prospectus forming part thereof to be usable by Holders for a period of two years (or, if Rule 144(k) is amended to provide a shorter restrictive period, such shorter period) or such shorter period that will terminate when all the Notes or Exchange Notes, as applicable, covered by the Shelf Registration Statement have been sold pursuant to the Shelf Registration Statement (in any such case, such period being called the "Shelf Registration Period").

4. Registration Procedures. In connection with any Shelf Registration Statement and, to the extent specified, any Exchange Offer Registration Statement, the following provisions shall apply:

(a) The Company shall furnish to each Purchaser, prior to the filing thereof with the Commission, a copy of any Shelf Registration Statement and any Exchange Offer Registration Statement, and each amendment thereof and each amendment or supplement, if any, to the Prospectus included therein and the Company shall, if reasonably requested, promptly incorporate in such Registration Statement, such information and comments as the Purchasers reasonably agree with the Company and its counsel should be included therein provided that the Company shall not be required to take any action under this Section 4(a) that is not in the reasonable opinion of counsel for the Company in compliance with applicable law.

(b) The Company shall ensure that subject to Section 4(k), (i) any Registration Statement and any amendment thereto and any Prospectus forming a part thereof and any amendment or supplement thereto complies in all material respects with the Act, (ii) any Registration Statement and any amendment thereto does not, when it becomes effective, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading and (iii) any Prospectus forming part of any Registration Statement, and any amendment or supplement to such

7

Prospectus, does not, during the period when delivery thereof is required, include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements, in the light of the circumstances under which they were made, not misleading.

(c) (1) The Company shall advise the Purchasers and, in the case of a Shelf Registration Statement, the Holders of securities covered thereby and, if requested by you or any such Holder, confirm such advice in writing:

(i) when a Registration Statement and any amendment thereto has been filed with the Commission and when a Registration Statement or any post-effective amendment thereto has become effective; and

(ii) of any request by the Commission for amendments or supplements to a Registration Statement or the Prospectus included therein or for additional information.

(2) The Company shall advise the Purchasers and, in the case of a Shelf Registration Statement, the Holders of securities covered thereby, and, in the case of an Exchange Offer Registration Statement, any Exchanging Dealer which has provided in writing to the Company a telephone or facsimile number and address for notices, and, if requested by you or any such Holder or Exchanging Dealer, confirm such advice in writing:

(i) of the issuance by the Commission of any stop order suspending the effectiveness of a Registration Statement or the initiation of any proceedings for that purpose;

(ii) of the receipt by the Company of any notification with respect to the suspension of the qualification of the securities included therein for sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose; and

(iii) of the suspension of the use of a Prospectus.

(d) Subject to Section 4(k), the Company shall use its reasonable best efforts to prevent the issuance or obtain the withdrawal of any order suspending the effectiveness or use of any Registration Statement at the earliest possible time.

(e) The Company shall furnish to each Holder of securities included within the coverage of any Shelf Registration Statement, without charge, at least one copy of such Shelf Registration Statement and any post-effective amendment thereto, including financial statements and

8

schedules, and, if the Holder so requests in writing, all exhibits (including those incorporated by reference).

(f) Subject to Section 4(k), the Company shall, during the Shelf Registration Period, as promptly as is reasonably practicable deliver to each Holder of securities included within the coverage of any Shelf Registration Statement, without charge, as many copies of the Prospectus (including each preliminary Prospectus) included in such Shelf Registration Statement and any amendment or supplement thereto as such Holder may reasonably request; and subject to Section 4(k), the Company consents to the use of the Prospectus or any amendment or supplement thereto as to which no notice has been given pursuant to paragraph 4(c)(2) by each of the selling Holders of securities in connection with the offering and sale of the securities covered by the Prospectus or any amendment or supplement thereto.

(g) The Company shall furnish to each Exchanging Dealer which so requests, without charge, at least one copy of the Exchange Offer Registration Statement and any post-effective amendment thereto, including financial statements and schedules, any documents incorporated by reference therein, and, if the Exchanging Dealer so requests in writing, all exhibits (including those incorporated by reference).

(h) Subject to Section 4(k), the Company shall, during the Exchange Offer Registration Period, promptly deliver to each Exchanging Dealer, without charge, as many copies of the Prospectus included in such Exchange Offer Registration Statement and any amendment or supplement thereto as such Exchanging Dealer may reasonably request for delivery by such Exchanging Dealer in connection with a sale of Exchange Notes received by it pursuant to the Registered Exchange Offer; and subject to Section 4(k), the Company consents to the use of the Prospectus or any amendment or supplement thereto as to which no notice has been given pursuant to paragraph 4(c)(2) by any such Exchanging Dealer, as aforesaid.

(i) Prior to the Registered Exchange Offer or the effectiveness of a Registration Statement, the Company shall, if required by applicable law, register or qualify or cooperate with the Holders of securities included therein and their respective counsel in connection with the registration or qualification of such securities for offer and sale under the securities or blue sky laws of such jurisdictions as any such Holders reasonably request in writing and do any and all other acts or things necessary or advisable to enable the offer and sale in such United States jurisdictions of the securities covered by such Registration Statement; provided, however, that the Company will not be required to (i) qualify generally to do business or as a foreign corporation or as a dealer in securities in any

9

jurisdiction where it would not otherwise be required to so qualify but for this Section 4(i), (ii) file any general consent to service of process in any jurisdiction where it is not as of the date hereof so subject or (iii) subject itself to taxation in any jurisdiction where it is not otherwise subject.

(j) Unless the applicable securities shall be in book-entry only form, the Company shall cooperate with the Holders of Notes to facilitate the timely preparation and delivery of certificates representing Notes to be sold pursuant to any Registration Statement free of any restrictive legends and in such denominations and registered in such names as Holders may request prior to sales of Notes pursuant to such Registration Statement.

(k) Upon the occurrence of any event contemplated by paragraphs
(c)(1)(ii), (c)(2)(i) or (c)(2)(iii) above, the Company agrees to notify the Purchasers, and in the case of a Shelf Registration Statement, the Holders of securities covered thereby, to suspend use of the Prospectus and the Company shall prepare, using its reasonable best efforts to do so as soon as possible, a post-effective amendment to any Registration Statement or an amendment or supplement to the related Prospectus or file any other required document so that, as thereafter delivered to purchasers of the securities included therein, the Prospectus will not include an untrue statement of a material fact or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading and the Purchasers, and in the case of a Shelf Registration Statement, the Holders of securities covered thereby, shall suspend use of such Prospectus until the Company has amended or supplemented such Prospectus so that such Prospectus does not contain any such untrue statement or omission.

(l) The Company shall use its reasonable best efforts to cause The Depository Trust Company ("DTC") on the first business day following the effective date of any Shelf Registration Statement hereunder or as soon as possible thereafter to remove (i) from any existing CUSIP number assigned to any Series of Notes, any designation indicating that such Notes are "restricted securities," which efforts shall include delivery to DTC of a letter executed by the Company substantially in the form of Annex E hereto and (ii) any other stop or restriction on DTC's system with respect to such Notes. In the event the Company is unable to cause DTC to take the actions described in the immediately preceding sentence, the Company shall take such actions as Morgan Stanley may reasonably request to provide, as soon as practicable, a CUSIP number for each Series of Notes registered under such Registration Statement and to cause such CUSIP numbers to be assigned to such Notes (or to the maximum aggregate principal amount of such Notes to

10

which such number(s) may be assigned). Upon compliance with the foregoing requirements of this Section 4(l), the Company shall provide the Trustee with printed certificates for each Series of Notes, in a form eligible for deposit with DTC.

(m) The Company shall use its reasonable best efforts to comply with all applicable rules and regulations of the Commission and shall make generally available to its security holders as soon as practicable after the effective date of the applicable Registration Statement an earnings statement satisfying the provisions of Section 11(a) of the Act.

(n) The Company shall cause the Indenture to be qualified under the Trust Indenture Act of 1939 (the "Trust Indenture Act") in a timely manner.

(o) The Company may require each Holder of securities to be sold pursuant to any Shelf Registration Statement to furnish to the Company such information regarding such Holder and the distribution of such securities by such Holder as the Company may from time to time reasonably require for inclusion in such Registration Statement and securities of a Holder which does not provide information necessary for inclusion in such Registration Statement may be omitted from any Shelf Registration Statement.

(p) The Company shall, if reasonably requested, and in no event more than three times, promptly incorporate in a Prospectus supplement or post- effective amendment to a Shelf Registration Statement, such information as the Managing Underwriters and Holders of a majority in aggregate principal amount of each Series of Notes reasonably agree with the Company and its counsel should be included therein and shall make all required filings of such Prospectus supplement or post-effective amendment as soon as notified of the matters to be incorporated in such Prospectus supplement or post- effective amendment provided that the Company shall not be required to take any action under this Section 4(p) that is not in the reasonable opinion of counsel for the Company in compliance with applicable law.

(q) In the case of any Shelf Registration Statement, the Company shall enter into such customary agreements (including underwriting agreements) and take all other appropriate and reasonably required actions in connection therewith in order to expedite or facilitate the registration or the disposition of the Notes or the Exchange Notes, as the case may be, and in connection therewith, if an underwriting agreement is entered into, cause the same to contain indemnification provisions and procedures no less favorable than those set forth in Section 6 (or such other provisions and procedures acceptable to the Holders of a majority in aggregate principal amount of each Series of

11

Notes and the Managing Underwriters, if any) with respect to all parties to be indemnified pursuant to Section 6.

(r) In the case of any Shelf Registration Statement, the Company shall
(i) make reasonably available for inspection by the Holders of securities to be registered thereunder, subject to their acceptance of the provisions of this Section 4(r), any underwriter participating in any distribution pursuant to such Registration Statement, and any Special Counsel, accountant or other agent retained by the Holders or any such underwriter, all relevant financial and other records, pertinent corporate documents and properties of the Company and its subsidiaries as shall reasonably be required in connection with the discharge of their due diligence obligations; (ii) cause the Company's officers, directors and employees and any relevant trustee to supply all relevant information reasonably requested by the Holders or any such underwriter, Special Counsel, accountant or agent in connection with any such Registration Statement as is customary for similar due diligence examinations; provided, however, that, in the case of clause (i) and (ii) above, any information that is designated in writing by the Company, in good faith, as confidential at the time of delivery of such information shall be kept confidential by the Holders and any such underwriter, Special Counsel, accountant or agent, unless such disclosure is made in connection with a court proceeding or required by law, or such information becomes available to the public generally or through a third party without an accompanying obligation of confidentiality; and provided further, however, that the foregoing inspection and information gathering shall be coordinated on behalf of the Holders and the other parties entitled thereto by the Special Counsel and other parties; (iii) make such representations and warranties to the Holders of securities registered thereunder and the underwriters, if any, in form, substance and scope as are customarily made by issuers to underwriters in secondary offerings and covering such matters as are customarily covered in representations and warranties requested in secondary offerings; (iv) obtain opinions of counsel to the Company and updates thereof addressed to each selling Holder and the underwriters, if any, covering such matters and with such exceptions as are customarily covered or taken in opinions requested in secondary offerings; (v) obtain "cold comfort" letters and updates thereof from the independent certified public accountants of the Company (and, if necessary, any other independent certified public accountants of any subsidiary of the Company or of any business acquired by the Company for which financial statements and financial data are, or are required to be, included in the Registration Statement), addressed to each selling Holder of securities registered thereunder and the underwriters, if any, in customary form and covering matters of the type customarily covered in "cold comfort" letters in connection with secondary

12

offerings; and (vi) deliver such documents and certificates as may be reasonably requested by the Majority Holders and the Managing Underwriters, if any, or their counsel including those to evidence compliance with
Section 4(k) and with conditions customarily contained in the underwriting agreement or other agreement entered into by the Company. The foregoing actions set forth in clauses (iii), (iv), (v) and (vi) of this Section 4(r) shall be performed at (A) the effectiveness of such Registration Statement and each post-effective amendment thereto and (B) each closing under any underwriting or similar agreement as and to the extent required thereunder.

(s) In the case of any Exchange Offer Registration Statement, if requested by the Purchasers, the Company shall (i) make reasonably available for inspection by the Purchasers, subject to their acceptance of the provisions of this Section 4(s), and any Special Counsel, accountant or other agent retained by the Purchasers, all relevant financial and other records, pertinent corporate documents and properties of the Company and its subsidiaries as shall reasonably be required in connection with the discharge of their due diligence obligations; (ii) cause the Company's officers, directors and employees and any relevant trustee to supply all relevant information reasonably requested by the Purchasers or any such Special Counsel, accountant or agent in connection with any such Registration Statement as is customary for similar due diligence examinations; provided, however, that, in the case of clause (i) and (ii) above, any information that is designated in writing by the Company, in good faith, as confidential at the time of delivery of such information shall be kept confidential by the Purchasers and any such Special Counsel, accountant or agent, unless such disclosure is made in connection with a court proceeding or required by law, or such information becomes available to the public generally or through a third party without an accompanying obligation of confidentiality; and provided further, however, that the foregoing inspection and information gathering shall be coordinated on behalf of the Purchasers and other parties entitled thereto by the Special Counsel and other parties; (iii) make such representations and warranties to the Purchasers, in form, substance and scope as are customarily made by issuers to underwriters in secondary offerings and covering such matters as are customarily covered in representations and warranties requested in secondary offerings; and (iv) deliver such documents and certificates as may be reasonably requested by the Purchasers or their counsel, including those to evidence compliance with Section 4(k) and with conditions customarily contained in underwriting agreements. The foregoing actions set forth in clauses (iii) and (iv) of this Section 4(s) shall be performed, if requested by the Purchasers, at the closing of the Registered Exchange Offer and the effective date of any post-effective amendment to the Exchange Offer Registration Statement.

13

5. Registration Expenses. The Company shall bear all expenses incurred in connection with the performance of their obligations under Sections 2, 3 and 4 hereof and, in the event of any Shelf Registration Statement, will reimburse the Holders for the reasonable fees and disbursements of the Special Counsel designated in connection therewith, and, in the case of any Exchange Offer Registration Statement, will reimburse the Purchasers for the reasonable fees and disbursements of the Special Counsel acting in connection therewith.

6. Indemnification; Contribution.

(a) The Company agrees to indemnify and hold harmless each Holder and each person, if any, who controls any Holder within the meaning of either Section 15 of the Act or Section 20 of the Exchange Act from and against any and all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) caused by (i) any untrue statement or alleged untrue statement of a material fact contained in any Registration Statement or any amendment thereof, including all documents incorporated therein by reference, or the omission or alleged omission therefrom of a material fact required to be stated therein or necessary to make the statements therein not misleading or (ii) any untrue statement or alleged untrue statement of a material fact contained in any preliminary Prospectus or any Prospectus (or amendment or supplement thereto) or the omission or alleged omission therefrom of a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; except insofar as such losses, claims, damages or liabilities are caused by any such untrue statement or omission or alleged untrue statement or omission based upon information relating to any Holder furnished to the Company in writing by such Holder expressly for use therein. The Company shall also indemnify each Exchanging Dealer participating in the offering and sale of the Notes and each person who controls any such Exchanging Dealer (within the meaning of Section 15 of the Act or Section 20 of the Exchange Act) to the same extent and with the same limitations as provided above with respect to the indemnification of the Holders of the Notes.

The foregoing notwithstanding, the Company shall not be liable to the extent that such losses, claims, damages or liabilities arise out of or are based upon an untrue statement or alleged untrue statement or omission or alleged omission made in any Prospectus that is a preliminary Prospectus if (i) such indemnified person failed to send or deliver a copy of the Prospectus with or prior to the delivery of written confirmation of the sale of the Notes giving rise to such losses, claims, damages or liabilities and (ii) the Prospectus would have corrected such untrue statement or omission.

(b) Each Holder agrees, severally and not jointly, to indemnify and hold harmless the Company, the Company's directors,

14

the Company's officers who sign a Registration Statement, and each person, if any, who controls the Company within the meaning of either Section 15 of the Act or Section 20 of the Exchange Act from and against any and all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) caused by any untrue statement or alleged untrue statement of a material fact contained in any Registration Statement or any amendment thereof, any preliminary Prospectus or any Prospectus (as amended or supplemented if the Company shall have furnished any amendments or supplements thereto), or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, but only with reference to information relating to such Holder furnished to the Company in writing by such Holder expressly for use in such Registration Statement, preliminary Prospectus, Prospectus or any amendments or supplements thereto. In no event shall the liability of any Holder of the Notes hereunder be greater in amount than the net dollar amount of the proceeds received by such Holder from the sale of the Notes giving rise to such indemnification obligation.

(c) In case any proceeding (including any governmental investigation) shall be instituted involving any person in respect of which indemnity may be sought pursuant to either of the two preceding paragraphs, such person (the

"indemnified party") shall promptly notify the person against whom such indemnity may be sought (the "indemnifying party") in writing and the indemnifying party, upon request of the indemnified party, shall retain counsel reasonably satisfactory to the indemnified party to represent the indemnified party and any others the indemnifying party may designate in such proceeding and shall pay the reasonable fees and disbursements of such counsel related to such proceeding. In any such proceeding, any indemnified party shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such indemnified party unless (i) the indemnifying party and the indemnified party shall have mutually agreed to the retention of such counsel or
(ii) the named parties to any such proceeding (including any impleaded parties) include both the indemnifying party and the indemnified party and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. It is understood that the indemnifying party shall not, in respect of the legal expenses of any indemnified party in connection with any proceeding or related proceedings in the same jurisdiction, be liable for (a) the fees and expenses of more than one separate firm (in addition to any local counsel) for all Holders and all persons, if any, who control any Holders within the meaning of either Section 15 of the Act or Section 20 of the Exchange Act, and (b) the fees and expenses of more than one separate firm (in addition to any local counsel) for the Company and each person, if any, who controls the Company within the meaning of either such Section, and that all such fees and expenses shall be

15

reimbursed as they are incurred. In the case of any such separate firm for the Company and any such control persons of the Company, such firm shall be designated in writing by the Company. In the case of any such separate firm for the Holders or any such control persons of any Holders, such firm shall be designated in writing on behalf of the Majority Holders. The indemnifying party shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with such consent or if there be a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party from and against any loss or liability by reason of such settlement or judgment. Notwithstanding the foregoing sentence, if at any time an indemnified party shall have requested an indemnifying party to reimburse the indemnified party for fees and expenses of counsel as contemplated by the second and third sentences of this paragraph, the indemnifying party agrees that it shall be liable for any settlement of any proceeding effected without its written consent if (i) such settlement is entered into more than 30 days after receipt by such indemnifying party of the aforesaid request and (ii) such indemnifying party shall not have reimbursed the indemnified party in accordance with such request prior to the date of such settlement. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement of any pending or threatened proceeding in respect of which any indemnified party is or could have been a party and indemnity could have been sought hereunder by such indemnified party, unless such settlement includes an unconditional release of such indemnified party from all liability on claims that are the subject matter of such proceeding.

(d) To the extent the indemnification provided for in paragraph (a) or (b) of this Section 6 is unavailable to an indemnified party or insufficient in respect of any losses, claims, damages or liabilities referred to herein, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities (or actions in respect thereof) in such proportion as is appropriate to reflect the relative fault of the indemnifying party and the indemnified party in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities (or actions in respect thereof), as well as any other relevant equitable considerations. The relative fault of such indemnifying party and indemnified party shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact relates to information supplied by such indemnifying party or by such indemnified party, and the parties' relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Holders' respective obligations to contribute pursuant to this paragraph are several in proportion to the respective number of the Notes they have sold pursuant to a Registration Statement, and not joint.

16

(e) The Company and the Holders agree that it would not be just or equitable if contribution pursuant to Section 6(d) were determined by pro rata allocation or by any other method of allocation that does not take account of the equitable considerations referred to in paragraph (d) of this Section 6. The amount paid or payable by an indemnified party as a result of the losses, claims, damages or liabilities referred to in paragraph (d) of this Section 6 shall be deemed to include, subject to the limitations set forth above, any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 6, a Holder of the Notes shall not be required to contribute any amount in excess of the amount by which the total price at which the Notes sold by such indemnifying party and distributed to the public were offered to the public pursuant to any Registration Statement exceeds the amount of any damages which such indemnifying party has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The remedies provided for in this Section 6 are not exclusive and shall not limit any rights or remedies which may otherwise be available to any indemnified party at law or in equity.

(f) The indemnity and contribution provisions contained in this Section 6 shall remain operative and in full force and effect regardless of (i) any termination of this Agreement, (ii) any investigation made by or on behalf of any Holder or any person controlling any Holder, or the Company or any person controlling the Company and (iii) the sale of any Notes by any Holder.

7. Liquidated Damages Under Certain Circumstances. (a) Liquidated damages ("Liquidated Damages") shall become payable in respect of the Notes as follows if any of the following events occur (each such event in clauses (i) through (iv) below, a "Registration Default"):

(i) if the Exchange Offer Registration Statement is not filed with the Commission on or prior to the 120th day following the Closing Date;

(ii) if the Exchange Offer Registration Statement is not declared effective on or prior to the 180th day following the Closing Date;

(iii) if the Registered Exchange Offer is not consummated or the Shelf Registration Statement is not declared effective on or prior to the 225th day following the Closing Date; or

17

(iv) if after the Shelf Registration Statement is declared effective, (A) such Shelf Registration Statement ceases to be effective prior to the end of the Shelf Registration Period (except as permitted in paragraph (b) of this Section 7); (B) such Shelf Registration Statement or the related Prospectus ceases to be useable in connection with resales of Notes or Exchange Notes, as the case may be, covered by such Shelf Registration Statement prior to the end of the Shelf Registration Period (except as permitted in paragraph (b) of this Section 7) because (1) the Company determines that any event occurs as a result of which the related Prospectus forming part of such Shelf Registration Statement would include any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein in the light of the circumstances under which they were made not misleading, (2) the Company determines that it shall be necessary to amend such Shelf Registration Statement, or supplement the related Prospectus, to comply with the Act or the Exchange Act or the rules thereunder, or (3) the Company determines that it is advisable to suspend use of the Prospectus for a discrete period of time due to pending material corporate developments or similar material events that have not yet been publicly disclosed and as to which the Company believes public disclosure will be prejudicial to the Company.

Liquidated Damages shall accrue on the Notes or the Exchange Notes, as the case may be, over and above the interest rate set forth in the title to the Notes or the Exchange Notes, as the case may be, following the occurrence of each Registration Default set forth in clauses (i), (ii) and (iii) above from and including the next day following each such Registration Default, in each case at a rate equal to 0.25% per annum; provided, however, that in any case, if one or more Registration Defaults referred to in Section 7(a)(iv) occurs and continues for more than 60 days (whether or not consecutive) in any twelve month period (the 61st day being referred to as the "Default Day") then from the Default Day until the earlier of (i) the date the Shelf Registration Statement is again deemed effective or is useable, (ii) the date that is the second anniversary of the Closing Date (or, if Rule 144(k) of the Act is amended to provide a shorter restrictive period, such shorter period) or (iii) the date of which all the Notes are sold pursuant to the Shelf Registration Statement, Liquidated Damages shall accrue at a rate of 0.25% per annum; provided, further, that the aggregate amount of Liquidated Damages payable pursuant to this Section 7 will in no event exceed 0.25% per annum. The Liquidated Damages attributable to each Registration Default shall cease to accrue from the date such Registration Default is cured.

(b) A Registration Default referred to in Section 7(a)(iv) shall be deemed not to have occurred and be continuing in relation to the Shelf Registration Statement or the related Prospectus if (i) such Registration Default has occurred

18

solely as a result of (x) the filing of a post-effective amendment to such Shelf Registration Statement to incorporate annual audited financial information with respect to the Company where such post-effective amendment is not yet effective and needs to be declared effective to permit Holders to use the related Prospectus or (y) the occurrence of other material events or developments with respect to the Company that would need to be described in such Registration Statement or the related Prospectus and (ii) in the case of clause (y), the Company is proceeding promptly and in good faith to amend or supplement such Registration Statement and related Prospectus to describe such events.

(c) Any amounts of Liquidated Damages due pursuant to the foregoing paragraphs will be payable in cash on March 1 and September 1 of each year to the holders of record on the preceding February 15 and August 15, respectively.

8. Miscellaneous.

(a) No Inconsistent Agreements. The Company has not, as of the date hereof, entered into, nor shall it, on or after the date hereof, enter into, any agreement with respect to the Notes that is inconsistent with the rights granted to the Holders herein or otherwise conflicts with the provisions hereof.

(b) Amendments and Waivers. The provisions of this Agreement, including the provisions of this sentence, may not be amended, qualified, modified or supplemented, and waivers or consents to departures from the provisions hereof may not be given, unless the Company has obtained the written consent of the Holders of at least a majority of the then outstanding aggregate principal amount of each Series of Notes (or, after the consummation of any Exchange Offer in accordance with Section 2 hereof, of each Series of Exchange Notes); provided, however, that, with respect to any matter that affects the rights of any Purchaser hereunder, the Company shall obtain the written consent of the Purchasers. Notwithstanding the foregoing (except the foregoing proviso), a waiver or consent to departure from the provisions hereof with respect to a matter that relates exclusively to the rights of Holders whose Notes are being sold pursuant to a Registration Statement and that does not directly or indirectly affect the rights of other Holders may be given by the Holders of a majority of each Series of Notes, determined on the basis of Notes being sold rather than registered under such Registration Statement.

(c) Notices. All notices and other communications provided for or permitted hereunder shall be made in writing by hand-delivery, first-class mail, telex, telecopier, or air courier guaranteeing overnight delivery:

(1) if to a Holder, at the most current address given by such Holder to the Company in accordance with the provisions of this
Section 8(c), which address

19

initially is, with respect to each Holder, the address of such Holder maintained by the Registrar under the Indenture, with a copy in like manner to Morgan Stanley;

(2) if to you, initially at the address set forth in the Placement Agreement; and

(3) if to the Company, initially at the address set forth in the Placement Agreement.

All such notices and communications shall be deemed to have been duly given when received.

The Purchasers or the Company by notice to the other may designate additional or different addresses for subsequent notices or communications.

(d) Successors and Assigns. This Agreement shall inure to the benefit of and be binding upon the successors and assigns of each of the parties, including, without the need for an express assignment or any consent by the Company thereto, subsequent Holders of Notes and/or Exchange Notes. The Company hereby agrees to extend the benefits of this Agreement to any Holder of Notes and/or Exchange Notes and any such Holder may enforce the provisions of this Agreement as if an original party hereto.

(e) Counterparts. This Agreement may be executed in any number of counterparts and by the parties hereto in separate counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement.

(f) Headings. The headings in this Agreement are for convenience of reference only and shall not limit or otherwise affect the meaning hereof.

(g) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE AND TO BE PERFORMED IN SAID STATE.

(h) Severability. In the event that any one of more of the provisions contained herein, or the application thereof in any circumstances, is held invalid, illegal or unenforceable in any respect for any reason, the validity, legality and enforceability of any such provision in every other respect and of the remaining provisions hereof shall not be in any way impaired or affected thereby, it being intended that all of the rights and privileges of the parties shall be enforceable to the fullest extent permitted by law.

(i) Securities Held by the Company, etc. Whenever the consent or approval of Holders of a specified percentage of

20

principal amount of Notes or Exchange Notes is required hereunder, Notes or Exchange Notes, as applicable, held by the Company or their respective Affiliates (other than subsequent Holders of Notes or Exchange Notes if such subsequent Holders are deemed to be Affiliates solely by reason of their holdings of such Notes or Exchange Notes) shall not be counted in determining whether such consent or approval was given by the Holders of such required percentage.

21

Please confirm that the foregoing correctly sets forth the agreement among the Company and you.

Very truly yours,

McKESSON CORPORATION

By: /s/ Ivan D. Meyerson
   --------------------------------
     Name:  Ivan D. Meyerson
     Title:  Vice President

Accepted, March 11, 1997

MORGAN STANLEY & CO. INCORPORATED
BANCAMERICA SECURITIES, INC.
CHASE SECURITIES INC.
J.P. MORGAN SECURITIES INC.

By: MORGAN STANLEY & CO.
INCORPORATED

By: /s/ Mark H. Bradley
   -----------------------------
     Name:   Mark H. Bradley
     Title:  Principal


ANNEX A
Annex A

Each broker-dealer that receives Exchange Notes for its own account pursuant to the Exchange Offer must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Notes. The Letter of Transmittal states that by so acknowledging and by delivering a prospectus, a broker-dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act. This Prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of Exchange Notes received in exchange for Notes acquired by such broker-dealer as a result of market-making activities or other trading activities. The Company has agreed that, ending on the close of business on the 180th day following the Expiration Date (as defined herein), it will make this Prospectus available to any broker-dealer for use in connection with any such resale. See "Plan of Distribution."


ANNEX B
Annex B

Each broker-dealer that receives Exchange Notes for its own account in exchange for Notes, where such Notes were acquired by such broker-dealer as a result of market-making activities or other trading activities, must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Notes. See "Plan of Distribution."


ANNEX C
Plan of Distribution

Each broker-dealer that receives Exchange Notes for its own account pursuant to the Exchange Offer must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Notes. This Prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of Exchange Notes received in exchange for Notes where such Notes were acquired by such broker-dealer as a result of market-making activities or other trading activities. The Company has agreed that, starting on the Expiration Date and ending on the close of business on the 180th day following the Expiration Date, it will make this Prospectus, as amended or supplemented, available to any broker-dealer for use in connection with any such resale. In addition, until , 199 , all dealers effecting transactions in the Exchange Notes may be required to deliver a prospectus.

The Company will not receive any proceeds from any sale of Exchange Notes by broker-dealers. Exchange Notes received by broker-dealers for their own account pursuant to the Exchange Offer may be sold from time to time in one or more transactions in the over-the-counter market, in negotiated transactions, through the writing of options on the Exchange Notes or a combination of such methods of resale, at market prices prevailing at the time of resale, at prices related to such prevailing market prices or at negotiated prices. Any such resale may be made directly to purchasers or to or through brokers or dealers who may receive compensation in the form of commissions or concessions from any such broker-dealer and/or the purchasers of any such Exchange Notes. Any broker-dealer that resells Exchange Notes that were received by it for its own account pursuant to the Exchange Offer and any broker or dealer that participates in a distribution of such Exchange Notes may be deemed to be an "underwriter" within the meaning of the Act and any profit of any such resale of Exchange Notes and any commissions or concessions received by any such persons may be deemed to be underwriting compensation under the Securities Act. The Letter of Transmittal states that by acknowledging that it will deliver and by delivering a prospectus, a broker-dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

For a period of 180 days after the Expiration Date, the Company will promptly send additional copies of this Prospectus and any amendment or supplement to this Prospectus to any broker-dealer that requests such documents in the Letter of Transmittal. The Company has agreed to pay all expenses incident to the Exchange Offer (including the expenses of any Special Counsel for the holders of the Notes) other than commissions or concessions of any brokers or dealers and will indemnify the holders of the


Notes (including any broker-dealers) against certain liabilities, including liabilities under the Securities Act.

[If applicable, add information required by Regulation S-K Items 507 and/or 508.]

2

ANNEX D
Rider A

CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO.

Name:__________________________________________

Address: ______________________________________


Rider B

If the undersigned is not a broker-dealer, the undersigned represents that it is not engaged in, and does not intend to engage in, a distribution of Exchange Notes. If the undersigned is a broker-dealer that will receive Exchange Notes for its own account in exchange for Notes, it represents that the Notes to be exchanged for Exchange Notes were acquired by it as a result of market-making activities or other trading activities and acknowledges that it will deliver a prospectus in connection with any resale of such Exchange Notes; however, by so acknowledging and by delivering a prospectus, the undersigned will not be deemed to admit that it is an "underwriter" within the meaning of the Act.


ANNEX E
FORM OF LETTER TO BE PROVIDED BY ISSUER TO
THE DEPOSITORY TRUST COMPANY

McKesson Corporation
McKesson Plaza
One Post Street
San Francisco, CA 94104

The Depository Trust Company
7 Hanover Square, 23rd Floor
New York, NY 10004

Re: $175,000,000 6.60% Notes due March 1, 2000, $175,000,000 6 7/8% Notes due March 1, 2002, and $175,000,000 7.65% Debentures due March 1, 2027 of McKesson Corporation

Ladies and Gentlemen:

Please be advised that the Securities and Exchange Commission has declared effective a Registration Statement on Form S-3 under the Securities Act of 1933, as amended, with regard to all of the securities referenced above. Accordingly, there is no longer any restriction as to whom such securities may be sold and any restrictions on the CUSIP designations are no longer appropriate and may be removed. I understand that upon receipt of this letter, DTC will remove any stop or restriction on its system with respect to these issues.

As always, please do not hesitate to call if we can be of further assistance.

McKESSON CORPORATION

by: ______________________________

Authorized Officer


EXHIBIT 23.1

INDEPENDENT AUDITORS' CONSENT

We consent to the incorporation by reference in this Registration Statement of McKesson Corporation ("McKesson") on Form S-4 of our reports dated May 16, 1997 on McKesson's consolidated financial statements and consolidated supplementary financial schedule, both such reports appearing in the Annual Report on Form 10-K of McKesson Corporation for the year ended March 31, 1997, and our report on FoxMeyer Corporation's consolidated financial statements dated June 28, 1996 (March 18, 1997 as to paragraph seven of Note Q), which report expresses an unqualified opinion and includes an explanatory paragraph relating to the sale of the principal assets of FoxMeyer Corporation and its Chapter 7 bankruptcy filing, appearing in the Current Report on Form 8-K/A of McKesson Corporation filed with the Securities and Exchange Commission on April 28, 1997. We also consent to the reference to us under the heading "Experts" in the Prospectus, which is part of this Registration Statement.

/s/ Deloitte & Touche LLP

San Francisco, California
Dallas, Texas



July 8, 1997


EXHIBIT 24.1

POWER OF ATTORNEY

Each of the undersigned directors and each of the undersigned officers of McKesson Corporation, a Delaware corporation (the "Company"), does hereby constitute and appoint Mark A. Pulido, Richard H. Hawkins, Ivan D. Meyerson and Nancy A. Miller, and each of them, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead in any and all capacities, to execute and deliver in his or her name and on his or her behalf:

(a) one or more Registration Statements (with all exhibits thereto) of the Company on Form S-3 or any other appropriate form proposed to be filed by the Company with the Securities and Exchange Commission (the "SEC"), (including, without limitation, Registration Statements filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended, or any successor thereto (the "Securities Act")), for the purpose of registering under the Securities Act, up to 2.8 million shares of the Company's common stock, par value $.01 per share (the "Shares");

(b) any and all supplements and amendments (including, without limitation, post-effective amendments) to such Registration Statements; and

(c) any and all other documents and instruments in connection with the registration of the Shares which such attorneys-in-fact and agents, or any one of them, deem necessary or advisable to enable the Company to comply with (i) the Securities Act, the Securities Exchange Act of 1934, as amended, and the other federal securities laws of the United States of America and the rules, regulations and requirements of the SEC in respect of any thereof; (ii) the securities or Blue Sky laws of any state or other governmental subdivision of the United States of America; and (iii) the securities or similar applicable laws of any foreign jurisdiction;

and each of the undersigned hereby grants unto such attorneys-in-fact and agents, and each of them, or his or her substitute or substitutes, each and every act and thing requisite and necessary to be done in and about the premises as fully as to all intents and purposes as he or she might or could do in person, and does hereby ratify and confirm as his or her own acts and \deeds all that such attorneys-in-fact and agents, and each of them, or his or her substitute or substitutes, shall lawfully do or cause to be done by virtue hereof. Each one of such attorneys-in-fact and agents shall have, and may exercise, all of the powers hereby conferred.

IN WITNESS WHEREOF, the undersigned has hereunto subscribed this power of attorney this 26th day of March 1997.

        /s/ Alan Seelenfreund                  /s/ John M. Pietruski
-------------------------------------     ------------------------------------
          ALAN SEELENFREUND                        JOHN M. PIETRUSKI

         /s/ Mark A. Pulido                       /s/ Carl E. Reichardt
-------------------------------------     -------------------------------------
           MARK A. PULIDO                           CARL E. REICHARDT

      /s/ Mary G. F. Bitterman                      /s/ Jane E. Shaw
-------------------------------------     -------------------------------------
        MARY G. F. BITTERMAN                          JANE E. SHAW

        /s/ Tully M. Friedman                  /s/ Robert H. Waterman, Jr.
-------------------------------------     -------------------------------------
          TULLY M. FRIEDMAN                      ROBERT H. WATERMAN, JR.

        /s/ Heidi E. Yodowitz                    /s/ Richard H. Hawkins
-------------------------------------     -------------------------------------
          HEIDI E. YODOWITZ                        RICHARD H. HAWKINS


EXHIBIT 25.1

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM T-1

STATEMENT OF ELIGIBILITY
UNDER THE TRUST INDENTURE ACT OF 1939
OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE

CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY
OF A TRUSTEE PURSUANT TO SECTION 305(b)(2)_


THE FIRST NATIONAL BANK OF CHICAGO
(Exact name of trustee as specified in its charter)

A National Banking Association                               36-0899825
                                                          (I.R.S. employer
                                                       identification number)

   One First National Plaza, Chicago, Illinois                 60670-0126
    (Address of principal executive offices)                   (Zip Code)

The First National Bank of Chicago One First National Plaza, Suite 0286 Chicago, Illinois 60670-0286 Att: Lynn A. Goldstein, Law Department (312) 732-6919


(Name, address and telephone number of agent for service)


McKesson Corporation
(Exact name of obligor as specified in its charter)

          Delaware                                             94-3207296
(State or other jurisdiction of                             (I.R.S. employer
incorporation or organization)                           identification number)

             McKesson Plaza
             One Post Street
        San Francisco, California                                 94104
(Address of principal executive offices)                       (Zip Code)

6.60% Exchange Notes due March 1, 2000, 6 7/8% Exchange Notes due March 1, 2002 and 7.65% Exchange Debentures due March 1, 2027 Debt Securities


(Title of Indenture Securities)


Item 1. General Information. Furnish the following information as to the trustee:

(a) Name and address of each examining or supervising authority to which it is subject.

Comptroller of Currency, Washington, D.C., Federal Deposit Insurance Corporation, Washington, D.C., The Board of Governors of the Federal Reserve System, Washington D.C.

(b) Whether it is authorized to exercise corporate trust powers.

The trustee is authorized to exercise corporate trust powers.

Item 2. Affiliations With the Obligor. If the obligor is an affiliate of the trustee, describe each such affiliation.

No such affiliation exists with the trustee.

Item 16. List of exhibits. List below all exhibits filed as a part of this Statement of Eligibility.

1. A copy of the articles of association of the trustee now in effect.*

2. A copy of the certificates of authority of the trustee to commence business.*

3. A copy of the authorization of the trustee to exercise corporate trust powers.*

4. A copy of the existing by-laws of the trustee.*

5. Not applicable.

6. The consent of the trustee required by
Section 321(b) of the Act.

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7. A copy of the latest report of condition of the trustee published pursuant to law or the requirements of its supervising or examining authority.

8. Not applicable.

9. Not applicable.

Pursuant to the requirements of the Trust Indenture Act of 1939, as amended, the trustee, The First National Bank of Chicago, a national banking association organized and existing under the laws of the United States of America, has duly caused this Statement of Eligibility to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of Chicago and State of Illinois, on the 30th day of June, 1997.

The First National Bank of Chicago, Trustee

By   /s/ Richard D. Manella
  -----------------------------------
    Richard D. Manella
    Vice President and Senior Counsel

* Exhibits 1, 2, 3 and 4 are herein incorporated by reference to Exhibits bearing identical numbers in Item 16 of the Form T-1 of The First National Bank of Chicago, filed as Exhibit 25.1 to the Registration Statement on Form S-3 of SunAmerica Inc. filed with the Securities and Exchange Commission on October 25, 1996 (Registration No. 333-14201).


EXHIBIT 6

THE CONSENT OF THE TRUSTEE REQUIRED
BY SECTION 321(b) OF THE ACT

June 30, 1997

Securities and Exchange Commission
Washington, D.C. 20549

Gentlemen:

In connection with the qualification of an indenture between McKesson Corporation and The First National Bank of Chicago, the undersigned, in accordance with Section 321(b) of the Trust Indenture Act of 1939, as amended, hereby consents that the reports of examinations of the undersigned, made by Federal or State authorities authorized to make such examinations, may be furnished by such authorities to the Securities and Exchange Commission upon its request therefor.

Very truly yours,

The First National Bank of Chicago

By   /s/ Richard D. Manella
  -----------------------------------
    Richard D. Manella
    Vice President


EXHIBIT 7

Legal Title of Bank:    The First National Bank of Chicago    Call Date: 03/31/97 ST-BK:  17-1630 FFIEC 031
Address:                One First National Plaza, Ste 0303                                       Page RC-1
City, State Zip:        Chicago, IL 60670
FDIC Certificate No.:   0/3/6/1/8

CONSOLIDATED REPORT OF CONDITION FOR INSURED COMMERCIAL AND STATE-CHARTERED SAVINGS BANKS FOR MARCH 31, 1997

All schedules are to be reported in thousands of dollars. Unless otherwise indicated, report the amount outstanding of the last business day of the quarter.

SCHEDULE RC-BALANCE SHEET

                                                                                                               C400
                                                                    Dollar Amounts in                         -------
                                                                        Thousands             RCFD            BIL MIL THOU
                                                                        ---------             ----            ------------
ASSETS
1.  Cash and balances due from depository institutions
    (from Schedule RC-A):
    a. Noninterest-bearing balances and currency and coin(1).......                           0081             3,871,170        1.a.
    b. Interest-bearing balances(2)................................                           0071             6,498,314        1.b.
2.  Securities
    a. Held-to-maturity securities(from Schedule RC-B, column A)...                           1754                     0        2.a.
    b. Available-for-sale securities (from Schedule RC-B,
       column D)...................................................                           1773             3,901,208        2.b.
3.  Federal funds sold and securities purchased under agreements to
    resell                                                                                    1350             4,612,975        3.
4.  Loans and lease financing receivables:
    a. Loans and leases, net of unearned income (from Schedule
        RC-C)......................................................  RCFD 2122 23,345,201                                       4.a.
    b. LESS: Allowance for loan and lease losses...................  RCFD 3123    420,963                                       4.b.
    c. LESS: Allocated transfer risk reserve.......................  RCFD 3128          0                                       4.c.
    d. Loans and leases, net of unearned income, allowance, and
       reserve (item 4.a minus 4.b and 4.c)........................                           2125            22,924,238       4.d
5.  Trading assets (from Schedule RD-D)............................                           3545             8,792,158        5.
6.  Premises and fixed assets (including capitalized leases).......                           2145               706,928        6.
7.  Other real estate owned (from Schedule RC-M)...................                           2150                 6,563        7.
8.  Investments in unconsolidated subsidiaries and associated
    companies (from Schedule RC-M).................................                           2130                61,551        8.
9.  Customers' liability  to this bank on acceptances outstanding..                           2155               488,866        9.
10. Intangible assets (from Schedule RC-M).........................                           2143                291,569      10.
11. Other assets (from Schedule RC-F)..............................                           2160              1,775,283      11.
12. Total assets (sum of items 1 through 11).......................                           2170             53,930,823      12.

-------------
(1)  Includes cash items in process of collection and unposted debits.
(2)  Includes time certificates of deposit not held for trading.


Legal Title of Bank:           The First National Bank of Chicago
                               Call Date: 03/31/97 ST-BK: 17-1630 FFIEC 031
Address:                       One First National Plaza, Ste 0303     Page RC-2
City, State Zip:               Chicago, IL 60670
FDIC Certificate No.:          0/3/6/1/8
                               ---------

Schedule RC-Continued

                                                           Dollar Amounts in
                                                               Thousands                              Bil Mil Thou
                                                           -----------------                          ------------
LIABILITIES
13. Deposits:
    a. In domestic offices (sum of totals of columns
       A and C from Schedule RC-E, part I)...............                           RCON 2200         21,550,056          13.a.
       (1) Noninterest-bearing(1)........................  RCON 6631  8,895,137                                           13.a.1
       (2) Interest-bearing..............................  RCON 6636 12,654,919                                           13.a.2
    b. In foreign offices, Edge and Agreement
       subsidiaries, and IBFs (from Schedule
       RC-E, part II)....................................                           RCFN 2200         12,364,650          13.b.
       (1) Noninterest-bearing...........................  RCFN 6631    287,496                                           13.b.1
       (2) Interest-bearing..............................  RCFN 6636 12,077,154                                           13.b.2
14. Federal funds purchased and securities sold
    under agreements to repurchase:......................                           RCFD 2800          3,817,421          14
15. a. Demand notes issued to the U.S. Treasury..........                           RCON 2840             63,621          15.a.
    b. Trading Liabilities (from Schedule RC-D)..........                           RCFD 3548          5,872,831          15.b.
16. Other borrowed money:
    a. With original maturity of one year or less........                           RCFD 2332          2,607,549          16.a.
    b. With original maturity of more than one year......                           RCFD 2333            322,414          16.b.
17. Not applicable
18. Bank's liability on acceptance executed
    and outstanding......................................                           RCFD 2920            488,866          18.
19. Subordinated notes and debentures....................                           RCFD 3200          1,550,000          19.
20. Other liabilities (from Schedule RC-G)...............                           RCFD 2930          1,196,229          20.
21. Total liabilities (sum of items 13 through 20).......                           RCFD 2948         49,833,637          21.
22. Not applicable
EQUITY CAPITAL
23. Perpetual preferred stock and related surplus........                           RCFD 3838             0               23.
24. Common stock.........................................                           RCFD 3230            200,858          24.
25. Surplus (exclude all surplus related to
    preferred stock).....................................                           RCFD 3839          2,944,244          25.
26. a. Undivided profits and capital reserves............                           RCFD 3632            954,885          26.a.
    b. Net unrealized holding gains (losses) on
       available-for-sale securities.....................                           RCFD 8434             (1,089)         26.b.
27. Cumulative foreign currency translation
    adjustments..........................................                           RCFD 3284             (1,712)         27.
28. Total equity capital (sum of items 23 through 27)....                           RCFD 3210          4,097,186          28.
29. Total liabilities, limited-life preferred stock,
    and equity capital (sum of items 21,22, and 28)......                           RCFD 3300         53,930,823          29.

Memorandum
To be reported only with the March Report of Condition.
1. Indicate in the box at the right the number
   of the statement below that best describes
   the most comprehensive level of auditing work                                        Number
   performed for the bank by independent external                 **********************************
   auditors as of any date during 1996 ...........RCFD 6724 ....  *     2                          *                           M.1.
                                                                  **********************************

1 = Independent audit of the bank conducted in accordance               4 = Directors' examination of the bank performed by other
    with generally accepted auditing standards by a certified               external auditors (may be required by state chartering
    public accounting firm which submits a report on the bank               authority)
2 = Independent audit of the bank's parent holding company              5 = Review of the bank's financial statements by external
    conducted in accordance with generally accepted auditing                auditors
    standards by a certified public accounting firm which               6 = Compilation of the bank's financial statements by
    submits a report on the consolidated holding company                    external auditors
    (but not on the bank separately)                                    7 = Other audit procedures (excluding tax preparation work)
3 = Directors' examination of the bank conducted in                     8 = No external audit work
    accordance with generally accepted auditing standards
    by a certified public accounting firm (may be required
    by state chartering authority)


(1) Includes total demand deposits and noninterest-bearing time and savings

deposits.


EXHIBIT 99.1

LETTER OF TRANSMITTAL
MCKESSON CORPORATION

OFFER TO EXCHANGE ITS 6.60% EXCHANGE NOTES DUE MARCH 1, 2000
WHICH HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933
FOR ANY AND ALL OF ITS OUTSTANDING 6.60% NOTES DUE MARCH 1, 2000

PURSUANT TO THE PROSPECTUS DATED , 1997

THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW
YORK CITY TIME, ON , 1997, UNLESS EXTENDED. TENDERED
SECURITIES MAY BE WITHDRAWN AT ANY TIME ON OR PRIOR TO THE
EXPIRATION DATE OF THE EXCHANGE OFFER

Delivery To: The First National Bank of Chicago, Exchange Agent

             By Mail:                       By Hand or Overnight Delivery:
   (Registered or Certified Mail
           recommended)                   The First National Bank of Chicago
The First National Bank of Chicago              c/o First Chicago Trust
      c/o First Chicago Trust                     Company of New York
        Company of New York                         14 Wall Street
          14 Wall Street                          8th Floor, Window 2
        8th Floor, Window 2                    New York, New York 10005
     New York, New York 10005

Facsimile Transmissions:

(Eligible Institutions Only)

(212) 240-8938

To Confirm by Telephone
or for Information Call:

(212) 240-8801

DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE WILL

NOT CONSTITUTE A VALID DELIVERY.

THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ

CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.

The undersigned acknowledges that he or she has received and reviewed the Prospectus dated , 1997 (the "Prospectus") of McKesson Corporation (the "Company") and this Letter of Transmittal (the "Letter of Transmittal"), which together constitute the Company's offer (the "Exchange Offer") to exchange an aggregate principal amount of up to $175,000,000 6.60% Exchange Notes due March 1, 2000 (the "Exchange Notes due 2000") for a like principal amount of the Company's outstanding 6.60% Notes due March 1, 2000 (the "Private Notes due 2000").

The term "Expiration Date" shall mean 5:00 p.m., New York City time, on , 1997, unless the Company in its sole discretion, extends the Exchange Offer. The Company reserves the right to extend the Exchange Offer at its discretion, in which event the term "Expiration Date" shall mean the time and date when the Exchange Offer as so extended shall expire. The Company shall notify the holders of the Private Notes due 2000 of any extension by means of a press release or other public announcement no later than 9:00 a.m., New York City time, on the next business day after the previously scheduled Expiration Date.


The Exchange Notes due 2000 will bear interest from the most recent date to which interest has been paid on the Private Notes due 2000 or, if no interest has been paid, from March 1, 1997. Accordingly, if the relevant record date for interest payment occurs after the consummation of the Exchange Offer registered holders of Exchange Notes due 2000 on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. If, however, the relevant record date for interest payments occurs prior to the consummation of the Exchange Offer registered holders of Private Notes due 2000 on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. Private Notes due 2000 accepted for exchange will cease to accrue interest from and after the date of consummation of the Exchange Offer, except as set forth in the immediately preceding sentence. Holders of Private Notes due 2000 whose Private Notes due 2000 are accepted for exchange will not receive any payment in respect of accrued interest on such Private Notes due 2000 otherwise payable on any interest payment date the record date for which occurs on or after consummation of the Exchange Offer.

The Exchange Offer is not conditioned upon any minimum principal amount of Private Notes due 2000 being tendered for exchange. However, the Exchange Offer is subject to certain conditions. Please see the Prospectus under the section entitled "The Exchange Offers--Certain Conditions to the Exchange Offers."

The Exchange Offer is not being made to, nor will tenders be accepted from or on behalf of, holders of Private Notes due 2000 in any jurisdiction in which the making or acceptance of the Exchange Offer would not be in compliance with the laws of such jurisdiction.

Capitalized terms used but not defined herein shall have the same meaning given them in the Prospectus. As used herein, the term "Holder" means a holder of Private Notes due 2000, including any participant ("DTC Participant") in the book-entry transfer facility system of The Depository Trust Company ("DTC") whose name appears on a security position listing as the owner of the Private Notes due 2000. As used herein, the term "Certificates" means physical certificates representing Private Notes due 2000.

To participate in the Exchange Offer, Holders must tender by (a) book-entry transfer pursuant to the procedures set forth in the Prospectus under "The Exchange Offers--Procedures for Tendering Private Notes," or (b) forwarding Certificates herewith. Holders who are DTC Participants tendering by book-entry transfer must execute such tender through the Automated Tender Offer Program ("ATOP") of DTC. A Holder using ATOP should transmit its acceptance to DTC on or prior to the Expiration Date. DTC will verify such acceptance, execute a book-entry transfer of the tendered Private Notes due 2000 into the Exchange Agent's account at DTC and then send to the Exchange Agent confirmation of such book-entry transfer (a "Book-Entry Confirmation"), including an agent's message ("Agent's Message") confirming that DTC has received an express acknowledgement from such Holder that such Holder has received and agrees to be bound by this Letter of Transmittal and that the Company may enforce this Letter of Transmittal against such Holder. The Book-Entry Confirmation must be received by the Exchange Agent in order for the tender relating thereto to be effective. Book-entry transfer to DTC in accordance with DTC's procedures does not constitute delivery of the Book-Entry Confirmation to the Exchange Agent.

If the tender is not made through ATOP, Certificates, as well as this Letter of Transmittal (or facsimile thereof), properly completed and duly executed, with any required signature guarantees, and any other documents required by this Letter of Transmittal, must be received by the Exchange Agent at its address set forth herein on or prior to the Expiration Date in order for such tender to be effective.

Holders of Private Notes due 2000 who cannot complete the procedures for delivery by book-entry transfer of such Private Notes due 2000 on a timely basis or who cannot deliver their Certificates for such Private Notes due 2000 and all other required documents to the Exchange Agent on or prior to the Expiration Date, must, in order to participate in the Exchange Offer, tender their Private Notes due 2000 according to the guaranteed delivery procedures set forth in the Prospectus under "The Exchange Offers--Procedures for Tendering Private Notes due 2000".

PLEASE READ THIS ENTIRE LETTER OF TRANSMITTAL
CAREFULLY BEFORE COMPLETING THE FOLLOWING BOX

2

List below the Private Notes due 2000 to which this Letter of Transmittal relates. If the space provided below is inadequate, the certificate numbers and principal amount of Private Notes due 2000 should be listed on a separate signed schedule affixed hereto.

DESCRIPTION OF PRIVATE NOTES DUE 2000
(SEE INSTRUCTIONS 2, 3, AND 8)

  NAME(S) AND ADDRESS(ES)
  OF REGISTERED HOLDER(S)
    (PLEASE FILL IN, IF
           BLANK)                         (ATTACH ADDITIONAL SIGNED LIST IF NECESSARY)
----------------------------------------------------------------------------------------------------
                                       1                      2                       3
----------------------------------------------------------------------------------------------------
                                                                         PRINCIPAL AMOUNT OF PRIVATE
                                                                         NOTES DUE 2000 TENDERED(2)
                                                     AGGREGATE PRINCIPAL         (MUST BE IN
                            TITLE OF SECURITIES AND   AMOUNT OF PRIVATE  DENOMINATIONS OF $1,000 OR
                            CERTIFICATE NUMBER(S)(1)   NOTES DUE 2000    INTEGRAL MULTIPLES THEREOF)
                             -----------------------------------------------------------------------
                             -----------------------------------------------------------------------
                             -----------------------------------------------------------------------
                             -----------------------------------------------------------------------
                                     Total

(1) Certificate numbers not required if Private Notes due 2000 are being tendered by book-entry transfer.
(2) Unless otherwise indicated, a holder will be deemed to have tendered ALL of the Private Notes due 2000 represented in column 2.

[_]CHECK HERE IF TENDERED PRIVATE NOTES DUE 2000 ARE BEING DELIVERED BY BOOK- ENTRY TRANSFER MADE TO AN ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH DTC AND COMPLETE THE FOLLOWING:

Name of Tendering Institution:__________________________________________________

Account Number:_________________________________________________________________

Transaction Code Number:________________________________________________________

3

[_]CHECK HERE IF TENDERED PRIVATE NOTES DUE 2000 ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE THE FOLLOWING:

Name(s) of Registered Holder(s):________________________________________________

Window Ticket Number (if any):__________________________________________________

Date of Execution of Notice of Guaranteed Delivery:_____________________________

If delivered by book-entry transfer, complete the following:

Account Number:_________________________________________________________________

Transaction Code Number:________________________________________________________

[_]CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO.

Name:___________________________________________________________________________

Address:________________________________________________________________________

4

NOTE: SIGNATURES MUST BE PROVIDED BELOW
PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

LADIES AND GENTLEMEN:

Upon the terms and subject to the conditions of the Exchange Offer, the undersigned hereby tenders to the Company the aggregate principal amount of Private Notes due 2000 indicated above. The undersigned has completed, executed and delivered this Letter of Transmittal to indicate the action the undersigned desires to take with respect to the Exchange Offer.

Subject to, and effective upon, the acceptance for exchange of the Private Notes due 2000 tendered hereby, the undersigned hereby sells, assigns and transfers to, or upon the order of, the Company all right, title and interest in and to such Private Notes due 2000 as are being tendered hereby. The undersigned hereby irrevocably constitutes and appoints the Exchange Agent its agent and attorney-in-fact (with full knowledge that the Exchange Agent also acts as the agent of the Company) with respect to the tendered Private Notes due 2000 with full power of substitution to (i) deliver certificates for such Private Notes due 2000 to the Company and deliver all accompanying evidences of transfer and authenticity to, or upon the order of, the Company (ii) present such Private Notes due 2000 for transfer on the books of the Company and (iii) receive for the account of the Company all benefits and otherwise exercise all rights of the beneficial ownership of such Private Notes due 2000, all in accordance with the terms of the Exchange Offer. The power of attorney granted in this paragraph shall be deemed to be irrevocable and coupled with an interest.

The undersigned hereby represents and warrants that the undersigned has full power and authority to tender, sell, assign and transfer the Private Notes due 2000 tendered hereby and that the Company will acquire good and unencumbered title thereto, free and clear of all liens, restrictions, charges and encumbrances and not subject to any adverse claim when the same are accepted by the Company. The undersigned hereby further represents that (i) any Exchange Notes due 2000 acquired in exchange for Private Notes due 2000 tendered hereby will have been acquired in the ordinary course of business of the person receiving such Exchange Notes due 2000, whether or not such person is the undersigned, (ii) neither the holder nor any such other person has an arrangement or understanding with any person to participate in the "distribution" of such Exchange Notes due 2000 within the meaning of the Securities Act of 1933, as amended (the "Securities Act") and (iii) neither the holder nor any such other person is an "affiliate," as described in Rule 405 under the Securities Act of the Company.

The undersigned also acknowledges that this Exchange Offer is being made in reliance on an interpretation by the staff of the Securities and Exchange Commission (the "Commission"), as set forth in no-action letters issued to third parties, that the Exchange Notes due 2000 issued in exchange for the Private Notes due 2000 pursuant to the Exchange Offer may be offered for resale, resold and otherwise transferred by holders thereof (other than holders who are broker-dealers) without further compliance with the registration and prospectus delivery provisions of the Securities Act. However, the undersigned acknowledges that any purchaser of Private Notes due 2000 who is an affiliate of the Company within the meaning of Rule 405 under the Securities Act or who intends to participate in the Exchange Offer for the purpose of distributing the Exchange Notes, or any broker-dealer who purchased the Private Notes from the Company to resell pursuant to Rule 144A under the Securities Act or any other available exemption under the Securities Act (i) will not be able to rely on the interpretations of the staff of the Commission set forth in the above-mentioned no-action letters, (ii) will not be entitled to tender its Private Notes due 2000 in the Exchange Offer and (ii) must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any sale or transfer of the Private Notes due 2000 unless such sale or transfer is made pursuant to an exemption from such requirements. The undersigned also acknowledges that the Company has not sought its own no-action letter and there can be no assurance that the staff of the Commission would make a similar determination with respect to the Exchange Offer as in such other circumstances.

If the undersigned is not a broker-dealer, the undersigned represents that it is not engaged in, and does not intend to engage in, a distribution of the Exchange Notes due 2000. If the undersigned is a broker-dealer that

5

will receive Exchange Notes due 2000 for its own account in exchange for Private Notes due 2000, it represents that the Private Notes due 2000 to be exchanged for Exchange Notes due 2000 were acquired by it as a result of market-making activities or other trading activities, and acknowledges that it will deliver a prospectus meeting the requirements of the Securities Act in connection with any resale of such Exchange Notes due 2000 pursuant to the Exchange Offer; however, by so acknowledging and by delivering a prospectus, the undersigned will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

The undersigned will, upon request, execute and deliver any additional documents deemed by the Exchange Agent or the Company to be necessary or desirable to complete the assignment, transfer and sale of the Private Notes due 2000 tendered hereby. All authority conferred or agreed to be conferred in this Letter of Transmittal and every obligation of the undersigned hereunder shall be binding upon the successors, assigns, heirs, executors, administrators, trustees in bankruptcy and legal representatives of the undersigned and shall not be affected by, and shall survive, the death or incapacity of the undersigned. This tender may be withdrawn only in accordance with the procedures set forth in the instructions contained in this Letter of Transmittal.

For the purposes of the Exchange Offer, the Company shall be deemed to have accepted validly tendered Private Notes due 2000 when, as and if the Company has given oral and written notice thereof to the Exchange Agent.

If any tendered Private Notes due 2000 are not accepted for exchange pursuant to the Exchange Offer for any reason, certificates for any such unaccepted Private Notes due 2000 will be returned (or, in the case of Private Notes due 2000 tendered by book-entry transfer through DTC, will be promptly credited to an account maintained at DTC), without expense, to the undersigned at the address shown below or at a different address as may be indicated herein under the "Special Delivery Instructions" as promptly as practicable after the Expiration Date.

The undersigned understands that tenders of Private Notes due 2000 pursuant to the procedures described under the section entitled "The Exchange Offers-- Procedures for Tendering Private Notes" in the Prospectus and in the instructions hereto will constitute a binding agreement between the undersigned and the Company upon the terms and subject to the conditions of the Exchange Offer.

Unless otherwise indicated herein in the box entitled "Special Issuance Instructions" below, please deliver the Exchange Notes due 2000 (and, if applicable, substitute certificates representing Private Notes due 2000 for any Private Notes due 2000 not exchanged) in the name(s) of the undersigned or, in the case of a book-entry delivery of Private Notes due 2000, please credit the account indicated above maintained at DTC. Similarly, unless otherwise indicated under the box entitled "Special Delivery Instructions" below, please send the Exchange Notes due 2000 (and, if applicable, substitute certificates representing Private Notes due 2000 for any Private Notes due 2000 not exchanged) to the undersigned at the address shown above in the box entitled "Description of Private Notes due 2000." In the event that both "Special Issuance Instructions" and "Special Delivery Instructions" are completed, please issue the certificates representing the Exchange Notes due 2000 issued in exchange for the Private Notes due 2000 accepted for exchange in the name(s) of, and return any certificates for Private Notes due 2000 not tendered or not exchanged to, the person(s) so indicated. The undersigned understands that the Company has no obligation pursuant to the "Special Issuance Instructions" and "Special Delivery Instructions" to transfer any Private Notes due 2000 from the name of the registered holder(s) thereof if the Company does not accept for exchange any of the Private Notes due 2000 so tendered.

THE UNDERSIGNED, BY COMPLETING THE BOX ENTITLED "DESCRIPTION OF PRIVATE NOTES DUE 2000" ABOVE AND SIGNING THIS LETTER OF TRANSMITTAL, WILL BE DEEMED TO HAVE TENDERED THE PRIVATE NOTES DUE 2000 AS SET FORTH IN SUCH BOX ABOVE.

6

PLEASE SIGN HERE
(TO BE COMPLETED BY ALL TENDERING HOLDERS)

(COMPLETE ACCOMPANYING SUBSTITUTE FORM W-9)

I hereby TENDER the Private Notes due 2000 described above in the box entitled "Description of Private Notes due 2002" pursuant to the terms of the Exchange Offer.

X___________________________________    __________________________________, 1997
X___________________________________    __________________________________, 1997
X___________________________________    __________________________________, 1997
       Signature(s) of Owner(s)                           Date

If a holder is tendering any Private Notes due 2000, this Letter of Transmittal must be signed by the registered holder(s) as the name(s) appear(s) on the certificate(s) for the Private Notes due 2000 or on a security position listing or by any person(s) authorized to become registered holder(s) by endorsements and documents transmitted herewith. If signature is by a trustee, executor, administrator, guardian, officer or other person acting in a fiduciary or representative capacity, please set forth full title. See Instruction 4.

Name(s):________________________________________________________________________


(Please Type or Print)


Capacity:_______________________________________________________________________

Address:________________________________________________________________________


(Include Zip Code)

SIGNATURE GUARANTEE
(IF REQUIRED BY INSTRUCTION 4)

Signature(s) Guaranteed by an Eligible Institution:_____________________________


(Authorized Signature)


(Title)


(Name of Firm)


(Area Code and Telephone Number)

Dated: _______________________, 1997

7

   SPECIAL ISSUANCE INSTRUCTIONS             SPECIAL DELIVERY INSTRUCTIONS

    (SEE INSTRUCTIONS 4 AND 5)                (SEE INSTRUCTIONS 4 AND 5)


  To be completed ONLY if                   To be completed ONLY if
certificates for Private Notes due        certificates for Private Notes due
2000 not exchanged and/or Exchange        2000 not exchanged and/or Exchange
Notes due 2000 are to be issued in        Notes due 2000 are to be sent to
the name of and sent to someone           someone other than the person or
other than the person or person(s)        persons whose signature(s)
whose signature(s) appear(s) on           appear(s) on this Letter of
this Letter of Transmittal above,         Transmittal above or to such
or if Private Notes due 2000              person or persons at an address
delivered by book-entry transfer          other than shown in the box
which are not accepted for                entitled "Description of Private
exchange are to be returned by            Notes due 2000" on this Letter of
credit to an account maintained at        Transmittal above.
DTC other than the account
indicated above.

Issue Exchange Notes due 2000             Mail Exchange Notes due 2000
and/or Private Notes due 2000 to:         and/or Private Notes due 2000 to:


Name_______________________________       Name_______________________________
       (Please Type or Print)                      (Please Type or Print)

    -------------------------------           -------------------------------
       (Please Type or Print)                      (Please Type or Print)

Address____________________________       Address____________________________

     ------------------------------            ------------------------------
             (Zip Code)                                  (Zip Code)


-----------------------------------
    Employer Identification or
      Social Security Number

  (Complete Substitute Form W-9)

[_]Credit unexchanged Private
Notes due 2000 delivered by
book-entry transfer to the DTC
account set forth below.


(DTC Account Number, if
applicable)

8

INSTRUCTIONS

FORMING PART OF THE TERMS AND CONDITIONS OF THE
EXCHANGE OFFER

1. DELIVERY OF THIS LETTER OF TRANSMITTAL AND CERTIFICATES.

This Letter to Transmittal is to be completed either if (a) Certificates are to be forwarded herewith or (b) tenders are to be made pursuant to the procedures for tender by book-entry transfer set forth in "The Exchange Offers--Procedures for Tendering Private Notes" in the Prospectus and an Agent's Message is not delivered. Holders who are DTC Participants tendering by book-entry transfer must execute such tender through DTC's ATOP system. A holder using ATOP should transmit its acceptance to DTC on or prior to the Expiration Date. DTC will verify such acceptance, execute a book-entry transfer of the tendered Private Notes due 2000 into the Exchange Agent's account at DTC and then send to the Exchange Agent a Book-Entry Confirmation, including an Agent's Message confirming that DTC has received an express acknowledgement from such holder that such holder has received and agrees to be bound by this Letter of Transmittal and that the Company may enforce this Letter of Transmittal against such holder. The Book-Entry Confirmation must be received by the Exchange Agent in order for the tender relating thereto to be effective. Book-entry transfer to DTC in accordance with DTC's procedure does not constitute delivery of the Book-Entry Confirmation to the Exchange Agent. Private Notes due 2000 tendered hereby must be in denominations of $1,000 and integral multiples thereof.

If the tender is not made through ATOP, certificates representing Private Notes due 2000, as well as this Letter of Transmittal (or facsimile thereof), properly completed and duly executed, with any required signature guarantees, and any other documents required by this Letter of Transmittal, must be received by the Exchange Agent at its address set forth herein on or prior to the Expiration Date in order for such tender to be effective.

Holders who wish to tender their Private Notes due 2000 and (i) whose Private Notes due 2000 are not immediately available, or (ii) cannot deliver their Private Notes due 2000, this Letter of Transmittal or any other documents required hereby to the Exchange Agent prior to the Expiration Date or (iii) who cannot comply with the procedures for book-entry transfer on a timely basis must tender their Private Notes due 2000 according to the guaranteed delivery procedures set forth in the Prospectus. Pursuant to such procedures: (i) such tender must be made through an Eligible Institution (as defined below); (ii) prior to the Expiration Date, the Exchange Agent must have received from the Eligible Institution a properly completed and duly executed Notice of Guaranteed Delivery, substantially in the form provided by the Company (by fax transmission, mail or hand delivery) setting forth the name and address of the holder, the certificate number(s) of such Private Notes due 2000 (except in the case of book-entry tenders) and the principal amount of Private Notes due 2000 tendered, stating that the tender is being made thereby and guaranteeing that, within three NYSE trading days after the Expiration Date, this Letter of Transmittal (or a copy hereof) together with the certificate(s) representing the Private Notes due 2000 (except in the case of book-entry tenders) and any other required documents will be deposited by the Eligible Institution with the Exchange Agent; and (iii) such properly completed and executed Letter of Transmittal (or a copy hereof), as well as all other documents required by this Letter of Transmittal and the certificate(s) representing all tendered Private Notes due 2000 in proper form for transfer of a Book-Entry Confirmation with respect to such Private Notes due 2000, must be received by the Exchange Agent within three NYSE trading days after the Expiration Date, all as provided in the Prospectus under the section entitled "The Exchange Offers--Guaranteed Delivery Procedures." Any holder who wishes to tender his Private Notes due 2000 pursuant to the guaranteed delivery procedures described above must ensure that the Exchange Agent receives the Notice of Guaranteed Delivery prior to the Expiration Date. As used in this Letter of Transmittal, "Eligible Institution" shall mean a firm which is a member of a registered national securities exchange or a member of the National Association of Securities Dealers, Inc. or a commercial bank or trust company having an office or correspondent in the United States.

All questions as to the validity, eligibility (including time of receipt), acceptance and withdrawal of tendered Private Notes due 2000 will be determined by the Company in its sole discretion, which determination will be final and binding. The Company reserves the absolute right to reject any and all Private Notes due 2000 not

9

properly tendered or any Private Notes due 2000 the Company's acceptance of which would, in the opinion of counsel for the Company, be unlawful. The Company also reserves the right to waive any defects, irregularities or conditions of tender as to particular Private Notes due 2000. The Company's interpretation of the terms and conditions of the Exchange Offer (including the instructions in this Letter of Transmittal) shall be final and binding on all parties. Unless waived, any defects or irregularities in connection with tenders of Private Notes due 2000 must be cured within such time as the Company shall determine. Neither the Company, the Exchange Agent nor any other person shall be under any duty to give notification of defects or irregularities with respect to tenders of Private Notes due 2000, nor shall any of them incur any liability for failure to give such notification. Tenders of Private Notes due 2000 will not be deemed to have been made until such defects or irregularities have been cured or waived. Any Private Notes due 2000 received by the Exchange Agent that are not properly tendered and as to which the defects or irregularities have not been cured or waived will be returned by the Exchange Agent to the tendering holders, unless otherwise provided in this Letter of Transmittal, as soon as practicable following the Expiration Date.

See "The Exchange Offers" in the Prospectus.

2. TENDER BY HOLDER.

Only a holder of Private Notes due 2000 may tender such Private Notes due 2000 in the Exchange Offer. Any beneficial owner whose Private Notes due 2000 are registered in the name of a broker, dealer, commercial bank, trust company or other nominee and who wishes to tender should contact the registered holder promptly and instruct such registered holder to tender on behalf of such beneficial owner. If such beneficial owner wishes to tender on such owner's own behalf; such owner must, prior to completing and executing this Letter of Transmittal and delivering such owner's Private Notes due 2000, either make appropriate arrangements to register ownership of the Private Notes due 2000 in such owner's name or obtain a properly completed bond power from the registered holder. The transfer of registered ownership may take considerable time.

3. PARTIAL TENDERS AND WITHDRAWALS.

Tenders of Private Notes due 2000 will be accepted only in denominations of $1,000 and integral multiples thereof. If less than all the Private Notes due 2000 are to be tendered, the tendering holder(s) should fill in the aggregate principal amount of Private Notes due 2000 to be tendered in the box above entitled "Description of Private Notes due 2000--Principal Amount of Private Notes due 2000 Tendered." A reissued certificate representing the balance of nontendered Private Notes due 2000 will be sent to such tendering holder (except in the case of book-entry tenders), unless otherwise provided in the appropriate box on this Letter of Transmittal, promptly after the Expiration Date. ALL OF THE PRIVATE NOTES DUE 2000 DELIVERED TO THE EXCHANGE AGENT WILL BE DEEMED TO HAVE BEEN TENDERED UNLESS OTHERWISE INDICATED.

Any holder who has tendered Private Notes due 2000 may withdraw the tender by delivering written notice of withdrawal to the Exchange Agent prior to the Expiration Date. For a withdrawal to be effective, a written notice of withdrawal must be received by the Exchange Agent at its address set forth on the first page of this Letter of Transmittal. Any such notice of withdrawal must (i) specify the name of the person having tendered the Private Notes due 2000 to be withdrawn (the "Depositor"), (ii) identify the Private Notes due 2000 to be withdrawn (including the certificate number or numbers and principal amount of such Private Notes due 2000 (except in the case of book- entry tenders)), (iii) be signed by the holder in the same manner as the original signature on this Letter of Transmittal by which such Private Notes due 2000 were tendered (including any required signature guarantees) or be accompanied by documents of transfer sufficient to have the Trustee (as defined in the Prospectus) register the transfer of such Private Notes due 2000 into the name of the person withdrawing the tender and (iv) specify the name in which any such Private Notes due 2000 are registered, if different from that of the Depositor. If Private Notes due 2000 have been delivered or otherwise identified to the Exchange Agent, the name of the registered holder and the certificate numbers of the particular Private Notes due 2000 withdrawn must also be furnished to the Exchange Agent as aforesaid prior to the physical release of the withdrawn Private Notes due 2000. If the Private Notes due 2000 have been tendered pursuant to the

10

procedures for book-entry tender set forth in the Prospectus, a notice of withdrawal must specify, in lieu of certificate numbers, the name and account number at the DTC to be credited with the withdrawn Private Notes due 2000. Private Notes due 2000 properly withdrawn will thereafter be deemed not validly tendered for purposes of the Exchange Offer; provided, however, that withdrawn Private Notes due 2000 may be retendered by again following one of the procedures herein at any time prior to the Expiration Date. All questions as to the validity, form and eligibility (including time of receipt) of any notice of withdrawal, will be determined by the Company, whose determinations will be final and binding on all parties. Neither the Company, the Exchange Agent nor any other person will be under any duty to give notification of any debts or irregularities in any notice of withdrawal or incur any liability for failure to give such notification. See "The Exchange Offers--Withdrawal Rights" in the Prospectus.

4. SIGNATURES ON THIS LETTER OF TRANSMITTAL; BOND POWERS AND ENDORSEMENTS; GUARANTEE OF SIGNATURE.

If this Letter of Transmittal is signed by the registered holder of the Private Notes due 2000 tendered hereby, the signature must correspond exactly with the name as written on the face of the certificates (if applicable) without any change whatsoever.

If any tendered Private Notes due 2000 are owned of record by two or more joint owners, all such owners must sign this Letter of Transmittal.

If any tendered Private Notes due 2000 are registered in different names on several certificates, it will be necessary to complete, sign and submit as many separate copies of this Letter of Transmittal as there are different registrations of certificates.

When this Letter of Transmittal is signed by the registered holder or holders of the Private Notes due 2000 specified herein and tendered hereby, no endorsements of certificates or separate bond powers are required. If, however, the Exchange Notes due 2000 to be issued,or any untendered Private Notes due 2000 are to be reissued, to a person other than the registered holder, then endorsements of any certificates transmitted hereby or separate bond powers are required.

If this Letter of Transmittal is signed by a person other than the registered holder or holders of any certificate(s) specified herein, such certificate(s) must be endorsed or accompanied by appropriate bond powers, in either case signed exactly as the name or names of the registered holder(s) appear(s) on the certificate(s).

If this Letter of Transmittal or any certificates or bond powers are signed by trustees, executors, administrators, guardians, attorneys-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, such persons should so indicate when signing, and, unless waived by the Company, proper evidence satisfactory to the Company of their authority to so act must be submitted.

Endorsements on certificates for Private Notes due 2000 or signatures on bond powers required by this Instruction 4 must be guaranteed by an Eligible Institution.

Signatures on this Letter of Transmittal need not be guaranteed by an Eligible Institution, provided the Private Notes due 2000 are tendered: (i) by a registered holder of such Private Notes due 2000 (which term, for purposes of the Exchange Offer, includes any participant in the DTC system whose name appears on a security position listing as the holder of such Private Notes due 2000) who has not completed the box entitled "Special Issuance Instructions" or "Special Delivery Instructions" on this Letter of Transmittal; or (ii) for the account of an Eligible Institution.

5. SPECIAL ISSUANCE AND DELIVERY INSTRUCTIONS.

Tendering holders of Private Notes due 2000 should indicate in the applicable box the name and address in or to which Exchange Notes due 2000 issued pursuant to the Exchange Offer and/or substitute certificates evidencing Private Notes due 2000 not exchanged are to be issued or sent, if different from the name or address of the person signing this Letter of Transmittal. In the case of issuance in a different name, the employer identification or social security number of the person named must also be indicated. Holders tendering Private Notes due 2000 by book-entry transfer may request that Private Notes due 2000 not exchanged be credited to

11

such account maintained at the DTC as such holder may designate hereon. If no such instructions are given, such Private Notes due 2000 not exchanged will be returned to the name or address of the person signing this Letter of Transmittal.

6. TRANSFER TAXES.

The Company will pay all transfer taxes, if any, applicable to the transfer of Private Notes due 2000 to them or their order pursuant to the Exchange Offer. If however, Exchange Notes due 2000 and/or substitute Private Notes due 2000 not exchanged are to be delivered to, or are to be registered or issued in the name of, any person other than the registered holder of the Private Notes due 2000 tendered hereby, or if tendered Private Notes due 2000 are registered in the name of any person other than the person signing this Letter of Transmittal, or if a transfer tax is imposed for any reason other than the transfer of Private Notes due 2000 to the Company or their order pursuant to the Exchange Offer, the amount of any such transfer taxes (whether imposed on the registered holder or any other persons) will be payable by the tendering holder. If satisfactory evidence or payment of such taxes or exemption therefrom is not submitted herewith, the amount of such transfer taxes will be billed directly to such tendering holder.

Except as provided in this Instruction 6, it will not be necessary for transfer tax stamps to be affixed to the Private Notes due 2000 specified in this Letter of Transmittal.

7. WAIVER OF CONDITION.

Subject to the terms and conditions set forth in the Prospectus, the Company reserves the absolute right to waive satisfaction of any or all conditions enumerated in the Prospectus.

8. NO CONDITIONAL TENDERS.

No alternative, conditional, irregular or contingent tenders will be accepted. All tendering holders of Private Notes due 2000, by execution of this Letter of Transmittal, shall waive any right to receive notice of the acceptance of their Private Notes due 2000 for exchange.

Neither the Company nor any other person is obligated to give notice of defects or irregularities in any tender, nor shall any of them incur any liability for failure to give any such notice.

9. MUTILATED, LOST, STOLEN OR DESTROYED PRIVATE NOTES DUE 2000.

Any holder whose Private Notes due 2000 have been mutilated, lost, stolen or destroyed should contact the Exchange Agent at the address indicated above for further instructions.

10. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.

QUESTIONS RELATING TO THE PROCEDURE FOR TENDERING, AS WELL AS REQUESTS FOR ADDITIONAL COPIES OF THE PROSPECTUS AND THIS LETTER OF TRANSMITTAL, MAY BE DIRECTED TO THE EXCHANGE AGENT, AT THE ADDRESS INDICATED ON THE FIRST PAGE OF THIS LETTER OF TRANSMITTAL OR BY TELEPHONE AT (212) 240-8801.

12

IMPORTANT TAX INFORMATION

Under U.S. federal income tax laws, a registered holder of Private Notes due 2000 or Exchange Notes due 2000 is required to provide the Trustee (as payor) with such holder's correct Taxpayer Identification Number ("TIN") on Substitute Form W-9 below or otherwise establish a basis for exemption from backup withholding. If such holder is an individual, the TIN is his social security number. If the Trustee is not provided with the correct TIN, a $50 penalty may be imposed by the Internal Revenue Service, and payments made to such holder with respect to Private Notes due 2000 or Exchange Notes due 2000 may be subject to backup withholding.

Certain holders (including, among others, all corporations and certain foreign persons) are not subject to these backup withholding and reporting requirements. Exempt holders should indicate their exempt status on Substitute Form W-9. A foreign person may qualify as an exempt recipient by submitting to the Trustee a properly completed Internal Revenue Service Form W-8, signed under penalties of perjury, attesting to that holder's exempt status. A Form W-8 can be obtained from the Trustee.

If backup withholding applies, the Trustee is required to withhold 31% of any payments made to the holder or other payee. Backup withholding is not an additional U.S. federal income tax. Rather, the U.S. federal income tax liability of persons subject to backup withholding will be reduced by the amount of tax withheld. If withholding results in an overpayment of taxes, a refund may be obtained from the Internal Revenue Service.

PURPOSE OF SUBSTITUTE FORM W-9

To prevent backup withholding on payments made with respect to Private Notes due 2000 or Exchange Notes due 2000 the holder is required to provide the Trustee with: (i) the holder's correct TIN by completing the form below, certifying that the TIN provided on Substitute Form W-9 is correct (or that such holder is awaiting a TIN) and that (A) such holder is exempt from backup withholding, (B) the holder has not been notified by the Internal Revenue Service that the holder is subject to backup withholding as a result of failure to report all interest or dividends or (C) the Internal Revenue Service has notified the holder that the holder is no longer subject to backup withholding; and (ii) if applicable, an adequate basis for exemption.

13

TO BE COMPLETED BY ALL TENDERING HOLDERS

(SEE "IMPORTANT TAX INFORMATION" ABOVE)

PAYER'S NAME: THE FIRST NATIONAL BANK OF CHICAGO

PART 1--PLEASE PROVIDE YOUR TIN:__________________

                       TIN IN THE BOX AT RIGHT AND        Social Security
                       CERTIFY BY SIGNING AND                Number or
SUBSTITUTE             DATING BELOW.                          Employee
                                                       Identification Number
                      --------------------------------------------------------
FORM W-9               PART 2--CERTIFICATION--Under          PART 3
                       penalties of perjury, I certify
                       that:


DEPARTMENT OF THE                                            Awaiting TIN [_]
TREASURY

INTERNAL REVENUE       (1) The number shown on this form
SERVICE                    is my correct Taxpayer
                           Identification Number (or I am
                           waiting for a number to be
                           issued to me) and

PAYER'S REQUEST FOR
TAXPAYER

IDENTIFICATION
NUMBER (TIN)           (2) I am not subject to backup
                           withholding because (i) I am
                           exempt from backup
                           withholding, (ii) I have not

been notified by the Internal Revenue Service ("IRS") that I am subject to backup withholding as a result of a failure to report all interest or dividends, or (iii) the IRS has notified me that I am no longer subject to backup withholding.

Certificate Instructions--You must cross out item
(2) above if you have been notified by the IRS that you are currently subject to backup withholding because of underreporting interest or dividends on your tax return. However, if after being notified by the IRS that you were subject to backup withholding you received another notification from the IRS stating that you are no longer subject to backup withholding, do not cross out such item (2).

SIGNATURE ___________________________________________ DATE_________________________________________________ NAME_________________________________________________


(Please Print)

NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY IN CERTAIN CIRCUMSTANCES
RESULT IN BACKUP WITHHOLDING OF 31% OF ANY AMOUNTS PAID TO YOU PURSUANT TO THE EXCHANGE OFFER. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.

14

YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART 3 OF SUBSTITUTE FORM W-9.

PART 3 OF SUBSTITUTE FORM W-9.

CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

I certify under penalties of perjury that a taxpayer identification number has not been issued to me, and either (a) I have mailed or delivered an application to receive a taxpayer identification number to the appropriate Internal Revenue Service Center or Social Security Administration Office or
(b) I intend to mail or deliver an application in the near future. I understand that if I do not provide a taxpayer identification number by the time of payment, 31% of all payments made to me on account of the Notes due 2000 shall be retained until I provide a taxpayer identification number to the Exchange Agent and that, if I do not provide my taxpayer identification number within 60 days, such retained amounts shall be remitted to the Internal Revenue Service as backup withholding and 31% of all reportable payments made to me thereafter will be withheld and remitted to the Internal Revenue Service until I provide a taxpayer identification number.


Signature(s) Date

IMPORTANT: THIS LETTER OF TRANSMITTAL OR A COPY HEREOF (TOGETHER WITH THE CERTIFICATES FOR PRIVATE NOTES DUE 2000 (IF APPLICABLE) AND ALL OTHER REQUIRED DOCUMENTS) MUST BE RECEIVED BY THE EXCHANGE AGENT PRIOR TO THE EXPIRATION DATE.

15

EXHIBIT 99.2

LETTER OF TRANSMITTAL
MCKESSON CORPORATION

OFFER TO EXCHANGE ITS 6 7/8% EXCHANGE NOTES DUE MARCH 1, 2002
WHICH HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933
FOR ANY AND ALL OF ITS OUTSTANDING 6 7/8% NOTES DUE MARCH 1, 2002

PURSUANT TO THE PROSPECTUS DATED , 1997

THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW
YORK CITY TIME, ON , 1997, UNLESS EXTENDED. TENDERED
SECURITIES MAY BE WITHDRAWN AT ANY TIME ON OR PRIOR TO THE
EXPIRATION DATE OF THE EXCHANGE OFFER

Delivery To: The First National Bank of Chicago, Exchange Agent

             By Mail:                       By Hand or Overnight Delivery:
   (Registered or Certified Mail
           recommended)                   The First National Bank of Chicago
The First National Bank of Chicago              c/o First Chicago Trust
      c/o First Chicago Trust                     Company of New York
        Company of New York                         14 Wall Street
          14 Wall Street                          8th Floor, Window 2
        8th Floor, Window 2                    New York, New York 10005
     New York, New York 10005

Facsimile Transmissions:

(Eligible Institutions Only)

(212) 240-8938

To Confirm by Telephone
or for Information Call:

(212) 240-8801

DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE WILL

NOT CONSTITUTE A VALID DELIVERY.

THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ

CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.

The undersigned acknowledges that he or she has received and reviewed the Prospectus dated , 1997 (the "Prospectus") of McKesson Corporation (the "Company") and this Letter of Transmittal (the "Letter of Transmittal"), which together constitute the Company's offer (the "Exchange Offer") to exchange an aggregate principal amount of up to $175,000,000 6 7/8% Exchange Notes due March 1, 2002 (the "Exchange Notes due 2002") for a like principal amount of the Company's outstanding 6 7/8% Notes due March 1, 2002 (the "Private Notes due 2002").

The term "Expiration Date" shall mean 5:00 p.m., New York City time, on , 1997, unless the Company in its sole discretion, extends the Exchange Offer. The Company reserves the right to extend the Exchange Offer at its discretion, in which event the term "Expiration Date" shall mean the time and date when the Exchange Offer as so extended shall expire. The Company shall notify the holders of the Private Notes due 2002 of any extension by means of a press release or other public announcement no later than 9:00 a.m., New York City time, on the next business day after the previously scheduled Expiration Date.


The Exchange Notes due 2002 will bear interest from the most recent date to which interest has been paid on the Private Notes due 2002 or, if no interest has been paid, from March 1, 1997. Accordingly, if the relevant record date for interest payment occurs after the consummation of the Exchange Offer registered holders of Exchange Notes due 2002 on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. If, however, the relevant record date for interest payments occurs prior to the consummation of the Exchange Offer registered holders of Private Notes due 2002 on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. Private Notes due 2002 accepted for exchange will cease to accrue interest from and after the date of consummation of the Exchange Offer, except as set forth in the immediately preceding sentence. Holders of Private Notes due 2002 whose Private Notes due 2002 are accepted for exchange will not receive any payment in respect of accrued interest on such Private Notes due 2002 otherwise payable on any interest payment date the record date for which occurs on or after consummation of the Exchange Offer.

The Exchange Offer is not conditioned upon any minimum principal amount of Private Notes due 2002 being tendered for exchange. However, the Exchange Offer is subject to certain conditions. Please see the Prospectus under the section entitled "The Exchange Offers--Certain Conditions to the Exchange Offers."

The Exchange Offer is not being made to, nor will tenders be accepted from or on behalf of, holders of Private Notes due 2002 in any jurisdiction in which the making or acceptance of the Exchange Offer would not be in compliance with the laws of such jurisdiction.

Capitalized terms used but not defined herein shall have the same meaning given them in the Prospectus. As used herein, the term "Holder" means a holder of Private Notes due 2002, including any participant ("DTC Participant") in the book-entry transfer facility system of The Depository Trust Company ("DTC") whose name appears on a security position listing as the owner of the Private Notes due 2002. As used herein, the term "Certificates" means physical certificates representing Private Notes due 2002.

To participate in the Exchange Offer, Holders must tender by (a) book-entry transfer pursuant to the procedures set forth in the Prospectus under "The Exchange Offers--Procedures for Tendering Private Notes," or (b) forwarding Certificates herewith. Holders who are DTC Participants tendering by book-entry transfer must execute such tender through the Automated Tender Offer Program ("ATOP") of DTC. A Holder using ATOP should transmit its acceptance to DTC on or prior to the Expiration Date. DTC will verify such acceptance, execute a book-entry transfer of the tendered Private Notes due 2002 into the Exchange Agent's account at DTC and then send to the Exchange Agent confirmation of such book-entry transfer (a "Book-Entry Confirmation"), including an agent's message ("Agent's Message") confirming that DTC has received an express acknowledgement from such Holder that such Holder has received and agrees to be bound by this Letter of Transmittal and that the Company may enforce this Letter of Transmittal against such Holder. The Book-Entry Confirmation must be received by the Exchange Agent in order for the tender relating thereto to be effective. Book-entry transfer to DTC in accordance with DTC's procedures does not constitute delivery of the Book-Entry Confirmation to the Exchange Agent.

If the tender is not made through ATOP, Certificates, as well as this Letter of Transmittal (or facsimile thereof), properly completed and duly executed, with any required signature guarantees, and any other documents required by this Letter of Transmittal, must be received by the Exchange Agent at its address set forth herein on or prior to the Expiration Date in order for such tender to be effective.

Holders of Private Notes due 2002 who cannot complete the procedures for delivery by book-entry transfer of such Private Notes due 2002 on a timely basis or who cannot deliver their Certificates for such Private Notes due 2002 and all other required documents to the Exchange Agent on or prior to the Expiration Date, must, in order to participate in the Exchange Offer, tender their Private Notes due 2002 according to the guaranteed delivery procedures set forth in the Prospectus under "The Exchange Offers--Procedures for Tendering Private Notes due 2002".

PLEASE READ THIS ENTIRE LETTER OF TRANSMITTAL
CAREFULLY BEFORE COMPLETING THE FOLLOWING BOX

2

List below the Private Notes due 2002 to which this Letter of Transmittal relates. If the space provided below is inadequate, the certificate numbers and principal amount of Private Notes due 2002 should be listed on a separate signed schedule affixed hereto.

DESCRIPTION OF PRIVATE NOTES DUE 2002
(SEE INSTRUCTIONS 2, 3, AND 8)

  NAME(S) AND ADDRESS(ES)
  OF REGISTERED HOLDER(S)
    (PLEASE FILL IN, IF
           BLANK)                         (ATTACH ADDITIONAL SIGNED LIST IF NECESSARY)
----------------------------------------------------------------------------------------------------
                                       1                      2                       3
----------------------------------------------------------------------------------------------------
                                                                         PRINCIPAL AMOUNT OF PRIVATE
                                                                         NOTES DUE 2002 TENDERED(2)
                                                     AGGREGATE PRINCIPAL         (MUST BE IN
                            TITLE OF SECURITIES AND   AMOUNT OF PRIVATE  DENOMINATIONS OF $1,000 OR
                            CERTIFICATE NUMBER(S)(1)   NOTES DUE 2002    INTEGRAL MULTIPLES THEREOF)
                             -----------------------------------------------------------------------
                             -----------------------------------------------------------------------
                             -----------------------------------------------------------------------
                             -----------------------------------------------------------------------
                                     Total

(1) Certificate numbers not required if Private Notes due 2002 are being tendered by book-entry transfer.
(2) Unless otherwise indicated, a holder will be deemed to have tendered ALL of the Private Notes due 2002 represented in column 2.

[_]CHECK HERE IF TENDERED PRIVATE NOTES DUE 2002 ARE BEING DELIVERED BY BOOK- ENTRY TRANSFER MADE TO AN ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH DTC AND COMPLETE THE FOLLOWING:

Name of Tendering Institution:__________________________________________________

Account Number:_________________________________________________________________

Transaction Code Number:________________________________________________________

3

[_]CHECK HERE IF TENDERED PRIVATE NOTES DUE 2002 ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE THE FOLLOWING:

Name(s) of Registered Holder(s):________________________________________________

Window Ticket Number (if any):__________________________________________________

Date of Execution of Notice of Guaranteed Delivery:_____________________________

If delivered by book-entry transfer, complete the following:

Account Number:_________________________________________________________________

Transaction Code Number:________________________________________________________

[_]CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO.

Name:___________________________________________________________________________

Address:________________________________________________________________________

4

NOTE: SIGNATURES MUST BE PROVIDED BELOW
PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

LADIES AND GENTLEMEN:

Upon the terms and subject to the conditions of the Exchange Offer, the undersigned hereby tenders to the Company the aggregate principal amount of Private Notes due 2002 indicated above. The undersigned has completed, executed and delivered this Letter of Transmittal to indicate the action the undersigned desires to take with respect to the Exchange Offer.

Subject to, and effective upon, the acceptance for exchange of the Private Notes due 2002 tendered hereby, the undersigned hereby sells, assigns and transfers to, or upon the order of, the Company all right, title and interest in and to such Private Notes due 2002 as are being tendered hereby. The undersigned hereby irrevocably constitutes and appoints the Exchange Agent its agent and attorney-in-fact (with full knowledge that the Exchange Agent also acts as the agent of the Company) with respect to the tendered Private Notes due 2002 with full power of substitution to (i) deliver certificates for such Private Notes due 2002 to the Company and deliver all accompanying evidences of transfer and authenticity to, or upon the order of, the Company (ii) present such Private Notes due 2002 for transfer on the books of the Company and (iii) receive for the account of the Company all benefits and otherwise exercise all rights of the beneficial ownership of such Private Notes due 2002, all in accordance with the terms of the Exchange Offer. The power of attorney granted in this paragraph shall be deemed to be irrevocable and coupled with an interest.

The undersigned hereby represents and warrants that the undersigned has full power and authority to tender, sell, assign and transfer the Private Notes due 2002 tendered hereby and that the Company will acquire good and unencumbered title thereto, free and clear of all liens, restrictions, charges and encumbrances and not subject to any adverse claim when the same are accepted by the Company. The undersigned hereby further represents that (i) any Exchange Notes due 2002 acquired in exchange for Private Notes due 2002 tendered hereby will have been acquired in the ordinary course of business of the person receiving such Exchange Notes due 2002, whether or not such person is the undersigned, (ii) neither the holder nor any such other person has an arrangement or understanding with any person to participate in the "distribution" of such Exchange Notes due 2002 within the meaning of the Securities Act of 1933, as amended (the "Securities Act") and (iii) neither the holder nor any such other person is an "affiliate," as described in Rule 405 under the Securities Act of the Company.

The undersigned also acknowledges that this Exchange Offer is being made in reliance on an interpretation by the staff of the Securities and Exchange Commission (the "Commission"), as set forth in no-action letters issued to third parties, that the Exchange Notes due 2002 issued in exchange for the Private Notes due 2002 pursuant to the Exchange Offer may be offered for resale, resold and otherwise transferred by holders thereof (other than holders who are broker-dealers) without further compliance with the registration and prospectus delivery provisions of the Securities Act. However, the undersigned acknowledges that any purchaser of Private Notes due 2002 who is an affiliate of the Company within the meaning of Rule 405 under the Securities Act or who intends to participate in the Exchange Offer for the purpose of distributing the Exchange Notes, or any broker-dealer who purchased the Private Notes from the Company to resell pursuant to Rule 144A under the Securities Act or any other available exemption under the Securities Act (i) will not be able to rely on the interpretations of the staff of the Commission set forth in the above-mentioned no-action letters, (ii) will not be entitled to tender its Private Notes due 2002 in the Exchange Offer and (ii) must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any sale or transfer of the Private Notes due 2002 unless such sale or transfer is made pursuant to an exemption from such requirements. The undersigned also acknowledges that the Company has not sought its own no-action letter and there can be no assurance that the staff of the Commission would make a similar determination with respect to the Exchange Offer as in such other circumstances.

If the undersigned is not a broker-dealer, the undersigned represents that it is not engaged in, and does not intend to engage in, a distribution of the Exchange Notes due 2002. If the undersigned is a broker-dealer that

5

will receive Exchange Notes due 2002 for its own account in exchange for Private Notes due 2002, it represents that the Private Notes due 2002 to be exchanged for Exchange Notes due 2002 were acquired by it as a result of market-making activities or other trading activities, and acknowledges that it will deliver a prospectus meeting the requirements of the Securities Act in connection with any resale of such Exchange Notes due 2002 pursuant to the Exchange Offer; however, by so acknowledging and by delivering a prospectus, the undersigned will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

The undersigned will, upon request, execute and deliver any additional documents deemed by the Exchange Agent or the Company to be necessary or desirable to complete the assignment, transfer and sale of the Private Notes due 2002 tendered hereby. All authority conferred or agreed to be conferred in this Letter of Transmittal and every obligation of the undersigned hereunder shall be binding upon the successors, assigns, heirs, executors, administrators, trustees in bankruptcy and legal representatives of the undersigned and shall not be affected by, and shall survive, the death or incapacity of the undersigned. This tender may be withdrawn only in accordance with the procedures set forth in the instructions contained in this Letter of Transmittal.

For the purposes of the Exchange Offer, the Company shall be deemed to have accepted validly tendered Private Notes due 2002 when, as and if the Company has given oral and written notice thereof to the Exchange Agent.

If any tendered Private Notes due 2002 are not accepted for exchange pursuant to the Exchange Offer for any reason, certificates for any such unaccepted Private Notes due 2002 will be returned (or, in the case of Private Notes due 2002 tendered by book-entry transfer through DTC, will be promptly credited to an account maintained at DTC), without expense, to the undersigned at the address shown below or at a different address as may be indicated herein under the "Special Delivery Instructions" as promptly as practicable after the Expiration Date.

The undersigned understands that tenders of Private Notes due 2002 pursuant to the procedures described under the section entitled "The Exchange Offers-- Procedures for Tendering Private Notes" in the Prospectus and in the instructions hereto will constitute a binding agreement between the undersigned and the Company upon the terms and subject to the conditions of the Exchange Offer.

Unless otherwise indicated herein in the box entitled "Special Issuance Instructions" below, please deliver the Exchange Notes due 2002 (and, if applicable, substitute certificates representing Private Notes due 2002 for any Private Notes due 2002 not exchanged) in the name(s) of the undersigned or, in the case of a book-entry delivery of Private Notes due 2002, please credit the account indicated above maintained at DTC. Similarly, unless otherwise indicated under the box entitled "Special Delivery Instructions" below, please send the Exchange Notes due 2002 (and, if applicable, substitute certificates representing Private Notes due 2002 for any Private Notes due 2002 not exchanged) to the undersigned at the address shown above in the box entitled "Description of Private Notes due 2002." In the event that both "Special Issuance Instructions" and "Special Delivery Instructions" are completed, please issue the certificates representing the Exchange Notes due 2002 issued in exchange for the Private Notes due 2002 accepted for exchange in the name(s) of, and return any certificates for Private Notes due 2002 not tendered or not exchanged to, the person(s) so indicated. The undersigned understands that the Company has no obligation pursuant to the "Special Issuance Instructions" and "Special Delivery Instructions" to transfer any Private Notes due 2002 from the name of the registered holder(s) thereof if the Company does not accept for exchange any of the Private Notes due 2002 so tendered.

THE UNDERSIGNED, BY COMPLETING THE BOX ENTITLED "DESCRIPTION OF PRIVATE NOTES DUE 2002" ABOVE AND SIGNING THIS LETTER OF TRANSMITTAL, WILL BE DEEMED TO HAVE TENDERED THE PRIVATE NOTES DUE 2002 AS SET FORTH IN SUCH BOX ABOVE.

6

PLEASE SIGN HERE
(TO BE COMPLETED BY ALL TENDERING HOLDERS)

(COMPLETE ACCOMPANYING SUBSTITUTE FORM W-9)

I hereby TENDER the Private Notes due 2002 described above in the box entitled "Description of Private Notes due 2002" pursuant to the terms of the Exchange Offer.

X___________________________________    __________________________________, 1997
X___________________________________    __________________________________, 1997
X___________________________________    __________________________________, 1997
       Signature(s) of Owner(s)                           Date

If a holder is tendering any Private Notes due 2002, this Letter of Transmittal must be signed by the registered holder(s) as the name(s) appear(s) on the certificate(s) for the Private Notes due 2002 or on a security position listing or by any person(s) authorized to become registered holder(s) by endorsements and documents transmitted herewith. If signature is by a trustee, executor, administrator, guardian, officer or other person acting in a fiduciary or representative capacity, please set forth full title. See Instruction 4.

Name(s):________________________________________________________________________


(Please Type or Print)


Capacity:_______________________________________________________________________

Address:________________________________________________________________________


(Include Zip Code)

SIGNATURE GUARANTEE
(IF REQUIRED BY INSTRUCTION 4)

Signature(s) Guaranteed by an Eligible Institution:_____________________________


(Authorized Signature)


(Title)


(Name of Firm)


(Area Code and Telephone Number)

Dated: _______________________, 1997

7

   SPECIAL ISSUANCE INSTRUCTIONS             SPECIAL DELIVERY INSTRUCTIONS

    (SEE INSTRUCTIONS 4 AND 5)                (SEE INSTRUCTIONS 4 AND 5)

  To be completed ONLY if                   To be completed ONLY if
certificates for Private Notes due        certificates for Private Notes due
2002 not exchanged and/or Exchange        2002 not exchanged and/or Exchange
Notes due 2002 are to be issued in        Notes due 2002 are to be sent to
the name of and sent to someone           someone other than the person or
other than the person or person(s)        persons whose signature(s)
whose signature(s) appear(s) on           appear(s) on this Letter of
this Letter of Transmittal above,         Transmittal above or to such
or if Private Notes due 2002              person or persons at an address
delivered by book-entry transfer          other than shown in the box
which are not accepted for                entitled "Description of Private
exchange are to be returned by            Notes due 2002" on this Letter of
credit to an account maintained at        Transmittal above.
DTC other than the account
indicated above.

Issue Exchange Notes due 2002             Mail Exchange Notes due 2002
and/or Private Notes due 2002 to:         and/or Private Notes due 2002 to:


Name_______________________________       Name_______________________________
       (Please Type or Print)                      (Please Type or Print)

    -------------------------------           -------------------------------
       (Please Type or Print)                      (Please Type or Print)

Address____________________________       Address____________________________

   ------------------------------              ------------------------------
             (Zip Code)                                  (Zip Code)

-----------------------------------
    Employer Identification or
      Social Security Number

  (Complete Substitute Form W-9)

[_]Credit unexchanged Private
Notes due 2002 delivered by
book-entry transfer to the DTC
account set forth below.


(DTC Account Number, if
applicable)

8

INSTRUCTIONS

FORMING PART OF THE TERMS AND CONDITIONS OF THE
EXCHANGE OFFER

1. DELIVERY OF THIS LETTER OF TRANSMITTAL AND CERTIFICATES.

This Letter to Transmittal is to be completed either if (a) Certificates are to be forwarded herewith or (b) tenders are to be made pursuant to the procedures for tender by book-entry transfer set forth in "The Exchange Offers--Procedures for Tendering Private Notes" in the Prospectus and an Agent's Message is not delivered. Holders who are DTC Participants tendering by book-entry transfer must execute such tender through DTC's ATOP system. A holder using ATOP should transmit its acceptance to DTC on or prior to the Expiration Date. DTC will verify such acceptance, execute a book-entry transfer of the tendered Private Notes due 2002 into the Exchange Agent's account at DTC and then send to the Exchange Agent a Book-Entry Confirmation, including an Agent's Message confirming that DTC has received an express acknowledgement from such holder that such holder has received and agrees to be bound by this Letter of Transmittal and that the Company may enforce this Letter of Transmittal against such holder. The Book-Entry Confirmation must be received by the Exchange Agent in order for the tender relating thereto to be effective. Book-entry transfer to DTC in accordance with DTC's procedure does not constitute delivery of the Book-Entry Confirmation to the Exchange Agent. Private Notes due 2002 tendered hereby must be in denominations of $1,000 and integral multiples thereof.

If the tender is not made through ATOP, certificates representing Private Notes due 2002, as well as this Letter of Transmittal (or facsimile thereof), properly completed and duly executed, with any required signature guarantees, and any other documents required by this Letter of Transmittal, must be received by the Exchange Agent at its address set forth herein on or prior to the Expiration Date in order for such tender to be effective.

Holders who wish to tender their Private Notes due 2002 and (i) whose Private Notes due 2002 are not immediately available, or (ii) cannot deliver their Private Notes due 2002, this Letter of Transmittal or any other documents required hereby to the Exchange Agent prior to the Expiration Date or (iii) who cannot comply with the procedures for book-entry transfer on a timely basis must tender their Private Notes due 2002 according to the guaranteed delivery procedures set forth in the Prospectus. Pursuant to such procedures: (i) such tender must be made through an Eligible Institution (as defined below); (ii) prior to the Expiration Date, the Exchange Agent must have received from the Eligible Institution a properly completed and duly executed Notice of Guaranteed Delivery, substantially in the form provided by the Company (by fax transmission, mail or hand delivery) setting forth the name and address of the holder, the certificate number(s) of such Private Notes due 2002 (except in the case of book-entry tenders) and the principal amount of Private Notes due 2002 tendered, stating that the tender is being made thereby and guaranteeing that, within three NYSE trading days after the Expiration Date, this Letter of Transmittal (or a copy hereof) together with the certificate(s) representing the Private Notes due 2002 (except in the case of book-entry tenders) and any other required documents will be deposited by the Eligible Institution with the Exchange Agent; and (iii) such properly completed and executed Letter of Transmittal (or a copy hereof), as well as all other documents required by this Letter of Transmittal and the certificate(s) representing all tendered Private Notes due 2002 in proper form for transfer of a Book-Entry Confirmation with respect to such Private Notes due 2002, must be received by the Exchange Agent within three NYSE trading days after the Expiration Date, all as provided in the Prospectus under the section entitled "The Exchange Offers--Guaranteed Delivery Procedures." Any holder who wishes to tender his Private Notes due 2002 pursuant to the guaranteed delivery procedures described above must ensure that the Exchange Agent receives the Notice of Guaranteed Delivery prior to the Expiration Date. As used in this Letter of Transmittal, "Eligible Institution" shall mean a firm which is a member of a registered national securities exchange or a member of the National Association of Securities Dealers, Inc. or a commercial bank or trust company having an office or correspondent in the United States.

All questions as to the validity, eligibility (including time of receipt), acceptance and withdrawal of tendered Private Notes due 2002 will be determined by the Company in its sole discretion, which determination will be final and binding. The Company reserves the absolute right to reject any and all Private Notes due 2002 not

9

properly tendered or any Private Notes due 2002 the Company's acceptance of which would, in the opinion of counsel for the Company, be unlawful. The Company also reserves the right to waive any defects, irregularities or conditions of tender as to particular Private Notes due 2002. The Company's interpretation of the terms and conditions of the Exchange Offer (including the instructions in this Letter of Transmittal) shall be final and binding on all parties. Unless waived, any defects or irregularities in connection with tenders of Private Notes due 2002 must be cured within such time as the Company shall determine. Neither the Company, the Exchange Agent nor any other person shall be under any duty to give notification of defects or irregularities with respect to tenders of Private Notes due 2002, nor shall any of them incur any liability for failure to give such notification. Tenders of Private Notes due 2002 will not be deemed to have been made until such defects or irregularities have been cured or waived. Any Private Notes due 2002 received by the Exchange Agent that are not properly tendered and as to which the defects or irregularities have not been cured or waived will be returned by the Exchange Agent to the tendering holders, unless otherwise provided in this Letter of Transmittal, as soon as practicable following the Expiration Date.

See "The Exchange Offers" in the Prospectus.

2. TENDER BY HOLDER.

Only a holder of Private Notes due 2002 may tender such Private Notes due 2002 in the Exchange Offer. Any beneficial owner whose Private Notes due 2002 are registered in the name of a broker, dealer, commercial bank, trust company or other nominee and who wishes to tender should contact the registered holder promptly and instruct such registered holder to tender on behalf of such beneficial owner. If such beneficial owner wishes to tender on such owner's own behalf; such owner must, prior to completing and executing this Letter of Transmittal and delivering such owner's Private Notes due 2002, either make appropriate arrangements to register ownership of the Private Notes due 2002 in such owner's name or obtain a properly completed bond power from the registered holder. The transfer of registered ownership may take considerable time.

3. PARTIAL TENDERS AND WITHDRAWALS.

Tenders of Private Notes due 2002 will be accepted only in denominations of $1,000 and integral multiples thereof. If less than all the Private Notes due 2002 are to be tendered, the tendering holder(s) should fill in the aggregate principal amount of Private Notes due 2002 to be tendered in the box above entitled "Description of Private Notes due 2002--Principal Amount of Private Notes due 2002 Tendered." A reissued certificate representing the balance of nontendered Private Notes due 2002 will be sent to such tendering holder (except in the case of book-entry tenders), unless otherwise provided in the appropriate box on this Letter of Transmittal, promptly after the Expiration Date. ALL OF THE PRIVATE NOTES DUE 2002 DELIVERED TO THE EXCHANGE AGENT WILL BE DEEMED TO HAVE BEEN TENDERED UNLESS OTHERWISE INDICATED.

Any holder who has tendered Private Notes due 2002 may withdraw the tender by delivering written notice of withdrawal to the Exchange Agent prior to the Expiration Date. For a withdrawal to be effective, a written notice of withdrawal must be received by the Exchange Agent at its address set forth on the first page of this Letter of Transmittal. Any such notice of withdrawal must (i) specify the name of the person having tendered the Private Notes due 2002 to be withdrawn (the "Depositor"), (ii) identify the Private Notes due 2002 to be withdrawn (including the certificate number or numbers and principal amount of such Private Notes due 2002 (except in the case of book- entry tenders)), (iii) be signed by the holder in the same manner as the original signature on this Letter of Transmittal by which such Private Notes due 2002 were tendered (including any required signature guarantees) or be accompanied by documents of transfer sufficient to have the Trustee (as defined in the Prospectus) register the transfer of such Private Notes due 2002 into the name of the person withdrawing the tender and (iv) specify the name in which any such Private Notes due 2002 are registered, if different from that of the Depositor. If Private Notes due 2002 have been delivered or otherwise identified to the Exchange Agent, the name of the registered holder and the certificate numbers of the particular Private Notes due 2002 withdrawn must also be furnished to the Exchange Agent as aforesaid prior to the physical release of the withdrawn Private Notes due 2002. If the Private Notes due 2002 have been tendered pursuant to the

10

procedures for book-entry tender set forth in the Prospectus, a notice of withdrawal must specify, in lieu of certificate numbers, the name and account number at the DTC to be credited with the withdrawn Private Notes due 2002. Private Notes due 2002 properly withdrawn will thereafter be deemed not validly tendered for purposes of the Exchange Offer; provided, however, that withdrawn Private Notes due 2002 may be retendered by again following one of the procedures herein at any time prior to the Expiration Date. All questions as to the validity, form and eligibility (including time of receipt) of any notice of withdrawal, will be determined by the Company, whose determinations will be final and binding on all parties. Neither the Company, the Exchange Agent nor any other person will be under any duty to give notification of any debts or irregularities in any notice of withdrawal or incur any liability for failure to give such notification. See "The Exchange Offers--Withdrawal Rights" in the Prospectus.

4. SIGNATURES ON THIS LETTER OF TRANSMITTAL; BOND POWERS AND ENDORSEMENTS; GUARANTEE OF SIGNATURE.

If this Letter of Transmittal is signed by the registered holder of the Private Notes due 2002 tendered hereby, the signature must correspond exactly with the name as written on the face of the certificates (if applicable) without any change whatsoever.

If any tendered Private Notes due 2002 are owned of record by two or more joint owners, all such owners must sign this Letter of Transmittal.

If any tendered Private Notes due 2002 are registered in different names on several certificates, it will be necessary to complete, sign and submit as many separate copies of this Letter of Transmittal as there are different registrations of certificates.

When this Letter of Transmittal is signed by the registered holder or holders of the Private Notes due 2002 specified herein and tendered hereby, no endorsements of certificates or separate bond powers are required. If, however, the Exchange Notes due 2002 to be issued,or any untendered Private Notes due 2002 are to be reissued, to a person other than the registered holder, then endorsements of any certificates transmitted hereby or separate bond powers are required.

If this Letter of Transmittal is signed by a person other than the registered holder or holders of any certificate(s) specified herein, such certificate(s) must be endorsed or accompanied by appropriate bond powers, in either case signed exactly as the name or names of the registered holder(s) appear(s) on the certificate(s).

If this Letter of Transmittal or any certificates or bond powers are signed by trustees, executors, administrators, guardians, attorneys-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, such persons should so indicate when signing, and, unless waived by the Company, proper evidence satisfactory to the Company of their authority to so act must be submitted.

Endorsements on certificates for Private Notes due 2002 or signatures on bond powers required by this Instruction 4 must be guaranteed by an Eligible Institution.

Signatures on this Letter of Transmittal need not be guaranteed by an Eligible Institution, provided the Private Notes due 2002 are tendered: (i) by a registered holder of such Private Notes due 2002 (which term, for purposes of the Exchange Offer, includes any participant in the DTC system whose name appears on a security position listing as the holder of such Private Notes due 2002) who has not completed the box entitled "Special Issuance Instructions" or "Special Delivery Instructions" on this Letter of Transmittal; or (ii) for the account of an Eligible Institution.

5. SPECIAL ISSUANCE AND DELIVERY INSTRUCTIONS.

Tendering holders of Private Notes due 2002 should indicate in the applicable box the name and address in or to which Exchange Notes due 2002 issued pursuant to the Exchange Offer and/or substitute certificates evidencing Private Notes due 2002 not exchanged are to be issued or sent, if different from the name or address of the person signing this Letter of Transmittal. In the case of issuance in a different name, the employer identification or social security number of the person named must also be indicated. Holders tendering Private Notes due 2002 by book-entry transfer may request that Private Notes due 2002 not exchanged be credited to

11

such account maintained at the DTC as such holder may designate hereon. If no such instructions are given, such Private Notes due 2002 not exchanged will be returned to the name or address of the person signing this Letter of Transmittal.

6. TRANSFER TAXES.

The Company will pay all transfer taxes, if any, applicable to the transfer of Private Notes due 2002 to them or their order pursuant to the Exchange Offer. If however, Exchange Notes due 2002 and/or substitute Private Notes due 2002 not exchanged are to be delivered to, or are to be registered or issued in the name of, any person other than the registered holder of the Private Notes due 2002 tendered hereby, or if tendered Private Notes due 2002 are registered in the name of any person other than the person signing this Letter of Transmittal, or if a transfer tax is imposed for any reason other than the transfer of Private Notes due 2002 to the Company or their order pursuant to the Exchange Offer, the amount of any such transfer taxes (whether imposed on the registered holder or any other persons) will be payable by the tendering holder. If satisfactory evidence or payment of such taxes or exemption therefrom is not submitted herewith, the amount of such transfer taxes will be billed directly to such tendering holder.

Except as provided in this Instruction 6, it will not be necessary for transfer tax stamps to be affixed to the Private Notes due 2002 specified in this Letter of Transmittal.

7. WAIVER OF CONDITION.

Subject to the terms and conditions set forth in the Prospectus, the Company reserves the absolute right to waive satisfaction of any or all conditions enumerated in the Prospectus.

8. NO CONDITIONAL TENDERS.

No alternative, conditional, irregular or contingent tenders will be accepted. All tendering holders of Private Notes due 2002, by execution of this Letter of Transmittal, shall waive any right to receive notice of the acceptance of their Private Notes due 2002 for exchange.

Neither the Company nor any other person is obligated to give notice of defects or irregularities in any tender, nor shall any of them incur any liability for failure to give any such notice.

9. MUTILATED, LOST, STOLEN OR DESTROYED PRIVATE NOTES DUE 2002.

Any holder whose Private Notes due 2002 have been mutilated, lost, stolen or destroyed should contact the Exchange Agent at the address indicated above for further instructions.

10. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.

QUESTIONS RELATING TO THE PROCEDURE FOR TENDERING, AS WELL AS REQUESTS FOR ADDITIONAL COPIES OF THE PROSPECTUS AND THIS LETTER OF TRANSMITTAL, MAY BE DIRECTED TO THE EXCHANGE AGENT, AT THE ADDRESS INDICATED ON THE FIRST PAGE OF THIS LETTER OF TRANSMITTAL OR BY TELEPHONE AT (212) 240-8801.

12

IMPORTANT TAX INFORMATION

Under U.S. federal income tax laws, a registered holder of Private Notes due 2002 or Exchange Notes due 2002 is required to provide the Trustee (as payor) with such holder's correct Taxpayer Identification Number ("TIN") on Substitute Form W-9 below or otherwise establish a basis for exemption from backup withholding. If such holder is an individual, the TIN is his social security number. If the Trustee is not provided with the correct TIN, a $50 penalty may be imposed by the Internal Revenue Service, and payments made to such holder with respect to Private Notes due 2002 or Exchange Notes due 2002 may be subject to backup withholding.

Certain holders (including, among others, all corporations and certain foreign persons) are not subject to these backup withholding and reporting requirements. Exempt holders should indicate their exempt status on Substitute Form W-9. A foreign person may qualify as an exempt recipient by submitting to the Trustee a properly completed Internal Revenue Service Form W-8, signed under penalties of perjury, attesting to that holder's exempt status. A Form W-8 can be obtained from the Trustee.

If backup withholding applies, the Trustee is required to withhold 31% of any payments made to the holder or other payee. Backup withholding is not an additional U.S. federal income tax. Rather, the U.S. federal income tax liability of persons subject to backup withholding will be reduced by the amount of tax withheld. If withholding results in an overpayment of taxes, a refund may be obtained from the Internal Revenue Service.

PURPOSE OF SUBSTITUTE FORM W-9

To prevent backup withholding on payments made with respect to Private Notes due 2002 or Exchange Notes due 2002 the holder is required to provide the Trustee with: (i) the holder's correct TIN by completing the form below, certifying that the TIN provided on Substitute Form W-9 is correct (or that such holder is awaiting a TIN) and that (A) such holder is exempt from backup withholding, (B) the holder has not been notified by the Internal Revenue Service that the holder is subject to backup withholding as a result of failure to report all interest or dividends or (C) the Internal Revenue Service has notified the holder that the holder is no longer subject to backup withholding; and (ii) if applicable, an adequate basis for exemption.

13

TO BE COMPLETED BY ALL TENDERING HOLDERS

(SEE "IMPORTANT TAX INFORMATION" ABOVE)

PAYER'S NAME: THE FIRST NATIONAL BANK OF CHICAGO

PART 1--PLEASE PROVIDE YOUR TIN:__________________

                       TIN IN THE BOX AT RIGHT AND        Social Security
                       CERTIFY BY SIGNING AND                Number or
SUBSTITUTE             DATING BELOW.                          Employee
                                                       Identification Number
                      --------------------------------------------------------
FORM W-9               PART 2--CERTIFICATION--Under          PART 3
                       penalties of perjury, I certify
                       that:


DEPARTMENT OF THE                                            Awaiting TIN [_]
TREASURY

INTERNAL REVENUE       (1) The number shown on this form
SERVICE                    is my correct Taxpayer
                           Identification Number (or I am
                           waiting for a number to be
                           issued to me) and

PAYER'S REQUEST FOR
TAXPAYER

IDENTIFICATION
NUMBER (TIN)           (2) I am not subject to backup
                           withholding because (i) I am
                           exempt from backup
                           withholding, (ii) I have not

been notified by the Internal Revenue Service ("IRS") that I am subject to backup withholding as a result of a failure to report all interest or dividends, or (iii) the IRS has notified me that I am no longer subject to backup withholding.

Certificate Instructions--You must cross out item
(2) above if you have been notified by the IRS that you are currently subject to backup withholding because of underreporting interest or dividends on your tax return. However, if after being notified by the IRS that you were subject to backup withholding you received another notification from the IRS stating that you are no longer subject to backup withholding, do not cross out such item (2).

SIGNATURE ___________________________________________ DATE_________________________________________________ NAME_________________________________________________


(Please Print)

NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY IN CERTAIN CIRCUMSTANCES
RESULT IN BACKUP WITHHOLDING OF 31% OF ANY AMOUNTS PAID TO YOU PURSUANT TO THE EXCHANGE OFFER. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.

14

YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART 3 OF SUBSTITUTE FORM W-9.

PART 3 OF SUBSTITUTE FORM W-9.

CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

I certify under penalties of perjury that a taxpayer identification number has not been issued to me, and either (a) I have mailed or delivered an application to receive a taxpayer identification number to the appropriate Internal Revenue Service Center or Social Security Administration Office or
(b) I intend to mail or deliver an application in the near future. I understand that if I do not provide a taxpayer identification number by the time of payment, 31% of all payments made to me on account of the Notes due 2002 shall be retained until I provide a taxpayer identification number to the Exchange Agent and that, if I do not provide my taxpayer identification number within 60 days, such retained amounts shall be remitted to the Internal Revenue Service as backup withholding and 31% of all reportable payments made to me thereafter will be withheld and remitted to the Internal Revenue Service until I provide a taxpayer identification number.


Signature(s) Date

IMPORTANT: THIS LETTER OF TRANSMITTAL OR A COPY HEREOF (TOGETHER WITH THE CERTIFICATES FOR PRIVATE NOTES DUE 2002 (IF APPLICABLE) AND ALL OTHER REQUIRED DOCUMENTS) MUST BE RECEIVED BY THE EXCHANGE AGENT PRIOR TO THE EXPIRATION DATE.

15

EXHIBIT 99.3

LETTER OF TRANSMITTAL
MCKESSON CORPORATION

OFFER TO EXCHANGE ITS 7.65% EXCHANGE DEBENTURES DUE MARCH 1, 2027
WHICH HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933
FOR ANY AND ALL OF ITS OUTSTANDING 7.65% DEBENTURES DUE MARCH 1, 2027

PURSUANT TO THE PROSPECTUS DATED , 1997

THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW
YORK CITY TIME, ON , 1997, UNLESS EXTENDED. TENDERED
SECURITIES MAY BE WITHDRAWN AT ANY TIME ON OR PRIOR TO THE
EXPIRATION DATE OF THE EXCHANGE OFFER

Delivery To: The First National Bank of Chicago, Exchange Agent

             By Mail:                       By Hand or Overnight Delivery:
   (Registered or Certified Mail
           recommended)                   The First National Bank of Chicago
The First National Bank of Chicago              c/o First Chicago Trust
      c/o First Chicago Trust                     Company of New York
        Company of New York                         14 Wall Street
          14 Wall Street                          8th Floor, Window 2
        8th Floor, Window 2                    New York, New York 10005
     New York, New York 10005

Facsimile Transmissions:

(Eligible Institutions Only)

(212) 240-8938

To Confirm by Telephone
or for Information Call:

(212) 240-8801

DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE WILL

NOT CONSTITUTE A VALID DELIVERY.

THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ

CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.

The undersigned acknowledges that he or she has received and reviewed the Prospectus dated , 1997 (the "Prospectus") of McKesson Corporation (the "Company") and this Letter of Transmittal (the "Letter of Transmittal"), which together constitute the Company's offer (the "Exchange Offer") to exchange an aggregate principal amount of up to $175,000,000 7.65% Exchange Debentures due March 1, 2027 (the "Exchange Debentures due 2027") for a like principal amount of the Company's outstanding 7.65% Debentures due March 1, 2027 (the "Private Debentures due 2027").

The term "Expiration Date" shall mean 5:00 p.m., New York City time, on , 1997, unless the Company in its sole discretion, extends the Exchange Offer. The Company reserves the right to extend the Exchange Offer at its discretion, in which event the term "Expiration Date" shall mean the time and date when the Exchange Offer as so extended shall expire. The Company shall notify the holders of the Private Debentures due 2027 of any extension by means of a press release or other public announcement no later than 9:00 a.m., New York City time, on the next business day after the previously scheduled Expiration Date.


The Exchange Debentures due 2027 will bear interest from the most recent date to which interest has been paid on the Private Debentures due 2027 or, if no interest has been paid, from March 1, 1997. Accordingly, if the relevant record date for interest payment occurs after the consummation of the Exchange Offer registered holders of Exchange Debentures due 2027 on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. If, however, the relevant record date for interest payments occurs prior to the consummation of the Exchange Offer registered holders of Private Debentures due 2027 on such record date will receive interest accruing from the most recent date to which interest has been paid or, if no interest has been paid, from March 1, 1997. Private Debentures due 2027 accepted for exchange will cease to accrue interest from and after the date of consummation of the Exchange Offer, except as set forth in the immediately preceding sentence. Holders of Private Debentures due 2027 whose Private Debentures due 2027 are accepted for exchange will not receive any payment in respect of accrued interest on such Private Debentures due 2027 otherwise payable on any interest payment date the record date for which occurs on or after consummation of the Exchange Offer.

The Exchange Offer is not conditioned upon any minimum principal amount of Private Debentures due 2027 being tendered for exchange. However, the Exchange Offer is subject to certain conditions. Please see the Prospectus under the section entitled "The Exchange Offers--Certain Conditions to the Exchange Offers."

The Exchange Offer is not being made to, nor will tenders be accepted from or on behalf of, holders of Private Debentures due 2027 in any jurisdiction in which the making or acceptance of the Exchange Offer would not be in compliance with the laws of such jurisdiction.

Capitalized terms used but not defined herein shall have the same meaning given them in the Prospectus. As used herein, the term "Holder" means a holder of Private Debentures due 2027, including any participant ("DTC Participant") in the book-entry transfer facility system of The Depository Trust Company ("DTC") whose name appears on a security position listing as the owner of the Private Debentures due 2027. As used herein, the term "Certificates" means physical certificates representing Private Debentures due 2027.

To participate in the Exchange Offer, Holders must tender by (a) book-entry transfer pursuant to the procedures set forth in the Prospectus under "The Exchange Offers--Procedures for Tendering Private Debentures," or (b) forwarding Certificates herewith. Holders who are DTC Participants tendering by book-entry transfer must execute such tender through the Automated Tender Offer Program ("ATOP") of DTC. A Holder using ATOP should transmit its acceptance to DTC on or prior to the Expiration Date. DTC will verify such acceptance, execute a book-entry transfer of the tendered Private Debentures due 2027 into the Exchange Agent's account at DTC and then send to the Exchange Agent confirmation of such book-entry transfer (a "Book-Entry Confirmation"), including an agent's message ("Agent's Message") confirming that DTC has received an express acknowledgement from such Holder that such Holder has received and agrees to be bound by this Letter of Transmittal and that the Company may enforce this Letter of Transmittal against such Holder. The Book-Entry Confirmation must be received by the Exchange Agent in order for the tender relating thereto to be effective. Book-entry transfer to DTC in accordance with DTC's procedures does not constitute delivery of the Book- Entry Confirmation to the Exchange Agent.

If the tender is not made through ATOP, Certificates, as well as this Letter of Transmittal (or facsimile thereof), properly completed and duly executed, with any required signature guarantees, and any other documents required by this Letter of Transmittal, must be received by the Exchange Agent at its address set forth herein on or prior to the Expiration Date in order for such tender to be effective.

Holders of Private Debentures due 2027 who cannot complete the procedures for delivery by book-entry transfer of such Private Debentures due 2027 on a timely basis or who cannot deliver their Certificates for such Private Debentures due 2027 and all other required documents to the Exchange Agent on or prior to the Expiration Date, must, in order to participate in the Exchange Offer, tender their Private Debentures due 2027 according to the guaranteed delivery procedures set forth in the Prospectus under "The Exchange Offers-- Procedures for Tendering Private Debentures due 2027".

PLEASE READ THIS ENTIRE LETTER OF TRANSMITTAL
CAREFULLY BEFORE COMPLETING THE FOLLOWING BOX

2

List below the Private Debentures due 2027 to which this Letter of Transmittal relates. If the space provided below is inadequate, the certificate numbers and principal amount of Private Debentures due 2027 should be listed on a separate signed schedule affixed hereto.

DESCRIPTION OF PRIVATE DEBENTURES DUE 2027
(SEE INSTRUCTIONS 2, 3, AND 8)

  NAME(S) AND ADDRESS(ES)
  OF REGISTERED HOLDER(S)
    (PLEASE FILL IN, IF
           BLANK)                         (ATTACH ADDITIONAL SIGNED LIST IF NECESSARY)
----------------------------------------------------------------------------------------------------
                                       1                      2                       3
----------------------------------------------------------------------------------------------------
                                                                         PRINCIPAL AMOUNT OF PRIVATE
                                                                             DEBENTURES DUE 2027
                                                     AGGREGATE PRINCIPAL   TENDERED(2) (MUST BE IN
                            TITLE OF SECURITIES AND   AMOUNT OF PRIVATE  DENOMINATIONS OF $1,000 OR
                            CERTIFICATE NUMBER(S)(1) DEBENTURES DUE 2027 INTEGRAL MULTIPLES THEREOF)
                             -----------------------------------------------------------------------
                             -----------------------------------------------------------------------
                             -----------------------------------------------------------------------
                             -----------------------------------------------------------------------
                                     Total

(1) Certificate numbers not required if Private Debentures due 2027 are being tendered by book-entry transfer.
(2) Unless otherwise indicated, a holder will be deemed to have tendered ALL of the Private Debentures due 2027 represented in column 2.

[_]CHECK HERE IF TENDERED PRIVATE DEBENTURES DUE 2027 ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER MADE TO AN ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH DTC AND COMPLETE THE FOLLOWING:

Name of Tendering Institution:__________________________________________________

Account Number:_________________________________________________________________

Transaction Code Number:________________________________________________________

3

[_]CHECK HERE IF TENDERED PRIVATE DEBENTURES DUE 2027 ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE THE FOLLOWING:

Name(s) of Registered Holder(s):________________________________________________

Window Ticket Number (if any):__________________________________________________

Date of Execution of Notice of Guaranteed Delivery:_____________________________

If delivered by book-entry transfer, complete the following:

Account Number:_________________________________________________________________

Transaction Code Number:________________________________________________________

[_]CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO.

Name:___________________________________________________________________________

Address:________________________________________________________________________

4

NOTE: SIGNATURES MUST BE PROVIDED BELOW
PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

LADIES AND GENTLEMEN:

Upon the terms and subject to the conditions of the Exchange Offer, the undersigned hereby tenders to the Company the aggregate principal amount of Private Debentures due 2027 indicated above. The undersigned has completed, executed and delivered this Letter of Transmittal to indicate the action the undersigned desires to take with respect to the Exchange Offer.

Subject to, and effective upon, the acceptance for exchange of the Private Debentures due 2027 tendered hereby, the undersigned hereby sells, assigns and transfers to, or upon the order of, the Company all right, title and interest in and to such Private Debentures due 2027 as are being tendered hereby. The undersigned hereby irrevocably constitutes and appoints the Exchange Agent its agent and attorney-in-fact (with full knowledge that the Exchange Agent also acts as the agent of the Company) with respect to the tendered Private Debentures due 2027 with full power of substitution to (i) deliver certificates for such Private Debentures due 2027 to the Company and deliver all accompanying evidences of transfer and authenticity to, or upon the order of, the Company (ii) present such Private Debentures due 2027 for transfer on the books of the Company and (iii) receive for the account of the Company all benefits and otherwise exercise all rights of the beneficial ownership of such Private Debentures due 2027, all in accordance with the terms of the Exchange Offer. The power of attorney granted in this paragraph shall be deemed to be irrevocable and coupled with an interest.

The undersigned hereby represents and warrants that the undersigned has full power and authority to tender, sell, assign and transfer the Private Debentures due 2027 tendered hereby and that the Company will acquire good and unencumbered title thereto, free and clear of all liens, restrictions, charges and encumbrances and not subject to any adverse claim when the same are accepted by the Company. The undersigned hereby further represents that (i) any Exchange Debentures due 2027 acquired in exchange for Private Debentures due 2027 tendered hereby will have been acquired in the ordinary course of business of the person receiving such Exchange Debentures due 2027, whether or not such person is the undersigned, (ii) neither the holder nor any such other person has an arrangement or understanding with any person to participate in the "distribution" of such Exchange Debentures due 2027 within the meaning of the Securities Act of 1933, as amended (the "Securities Act") and (iii) neither the holder nor any such other person is an "affiliate," as described in Rule 405 under the Securities Act of the Company.

The undersigned also acknowledges that this Exchange Offer is being made in reliance on an interpretation by the staff of the Securities and Exchange Commission (the "Commission"), as set forth in no-action letters issued to third parties, that the Exchange Debentures due 2027 issued in exchange for the Private Debentures due 2027 pursuant to the Exchange Offer may be offered for resale, resold and otherwise transferred by holders thereof (other than holders who are broker-dealers) without further compliance with the registration and prospectus delivery provisions of the Securities Act. However, the undersigned acknowledges that any purchaser of Private Debentures due 2027 who is an affiliate of the Company within the meaning of Rule 405 under the Securities Act or who intends to participate in the Exchange Offer for the purpose of distributing the Exchange Debentures, or any broker-dealer who purchased the Private Debentures from the Company to resell pursuant to Rule 144A under the Securities Act or any other available exemption under the Securities Act (i) will not be able to rely on the interpretations of the staff of the Commission set forth in the above-mentioned no-action letters,
(ii) will not be entitled to tender its Private Debentures due 2027 in the Exchange Offer and (ii) must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any sale or transfer of the Private Debentures due 2027 unless such sale or transfer is made pursuant to an exemption from such requirements. The undersigned also acknowledges that the Company has not sought its own no-action letter and there can be no assurance that the staff of the Commission would make a similar determination with respect to the Exchange Offer as in such other circumstances.

If the undersigned is not a broker-dealer, the undersigned represents that it is not engaged in, and does not intend to engage in, a distribution of the Exchange Debentures due 2027. If the undersigned is a broker-dealer

5

that will receive Exchange Debentures due 2027 for its own account in exchange for Private Debentures due 2027, it represents that the Private Debentures due 2027 to be exchanged for Exchange Debentures due 2027 were acquired by it as a result of market-making activities or other trading activities, and acknowledges that it will deliver a prospectus meeting the requirements of the Securities Act in connection with any resale of such Exchange Debentures due 2027 pursuant to the Exchange Offer; however, by so acknowledging and by delivering a prospectus, the undersigned will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act.

The undersigned will, upon request, execute and deliver any additional documents deemed by the Exchange Agent or the Company to be necessary or desirable to complete the assignment, transfer and sale of the Private Debentures due 2027 tendered hereby. All authority conferred or agreed to be conferred in this Letter of Transmittal and every obligation of the undersigned hereunder shall be binding upon the successors, assigns, heirs, executors, administrators, trustees in bankruptcy and legal representatives of the undersigned and shall not be affected by, and shall survive, the death or incapacity of the undersigned. This tender may be withdrawn only in accordance with the procedures set forth in the instructions contained in this Letter of Transmittal.

For the purposes of the Exchange Offer, the Company shall be deemed to have accepted validly tendered Private Debentures due 2027 when, as and if the Company has given oral and written notice thereof to the Exchange Agent.

If any tendered Private Debentures due 2027 are not accepted for exchange pursuant to the Exchange Offer for any reason, certificates for any such unaccepted Private Debentures due 2027 will be returned (or, in the case of Private Debentures due 2027 tendered by book-entry transfer through DTC, will be promptly credited to an account maintained at DTC), without expense, to the undersigned at the address shown below or at a different address as may be indicated herein under the "Special Delivery Instructions" as promptly as practicable after the Expiration Date.

The undersigned understands that tenders of Private Debentures due 2027 pursuant to the procedures described under the section entitled "The Exchange Offers--Procedures for Tendering Private Debentures" in the Prospectus and in the instructions hereto will constitute a binding agreement between the undersigned and the Company upon the terms and subject to the conditions of the Exchange Offer.

Unless otherwise indicated herein in the box entitled "Special Issuance Instructions" below, please deliver the Exchange Debentures due 2027 (and, if applicable, substitute certificates representing Private Debentures due 2027 for any Private Debentures due 2027 not exchanged) in the name(s) of the undersigned or, in the case of a book-entry delivery of Private Debentures due 2027, please credit the account indicated above maintained at DTC. Similarly, unless otherwise indicated under the box entitled "Special Delivery Instructions" below, please send the Exchange Debentures due 2027 (and, if applicable, substitute certificates representing Private Debentures due 2027 for any Private Debentures due 2027 not exchanged) to the undersigned at the address shown above in the box entitled "Description of Private Debentures due 2027." In the event that both "Special Issuance Instructions" and "Special Delivery Instructions" are completed, please issue the certificates representing the Exchange Debentures due 2027 issued in exchange for the Private Debentures due 2027 accepted for exchange in the name(s) of, and return any certificates for Private Debentures due 2027 not tendered or not exchanged to, the person(s) so indicated. The undersigned understands that the Company has no obligation pursuant to the "Special Issuance Instructions" and "Special Delivery Instructions" to transfer any Private Debentures due 2027 from the name of the registered holder(s) thereof if the Company does not accept for exchange any of the Private Debentures due 2027 so tendered.

THE UNDERSIGNED, BY COMPLETING THE BOX ENTITLED "DESCRIPTION OF PRIVATE DEBENTURES DUE 2027" ABOVE AND SIGNING THIS LETTER OF TRANSMITTAL, WILL BE DEEMED TO HAVE TENDERED THE PRIVATE DEBENTURES DUE 2027 AS SET FORTH IN SUCH BOX ABOVE.

6

PLEASE SIGN HERE
(TO BE COMPLETED BY ALL TENDERING HOLDERS)

(COMPLETE ACCOMPANYING SUBSTITUTE FORM W-9)

I hereby TENDER the Private Debentures due 2027 described above in the box entitled "Description of Private Debentures due 2027" pursuant to the terms of the Exchange Offer.

X___________________________________    __________________________________, 1997
X___________________________________    __________________________________, 1997
X___________________________________    __________________________________, 1997
       Signature(s) of Owner(s)                           Date

If a holder is tendering any Private Debentures due 2027, this Letter of Transmittal must be signed by the registered holder(s) as the name(s) appear(s) on the certificate(s) for the Private Debentures due 2027 or on a security position listing or by any person(s) authorized to become registered holder(s) by endorsements and documents transmitted herewith. If signature is by a trustee, executor, administrator, guardian, officer or other person acting in a fiduciary or representative capacity, please set forth full title. See Instruction 4.

Name(s):________________________________________________________________________


(Please Type or Print)


Capacity:_______________________________________________________________________

Address:________________________________________________________________________


(Include Zip Code)

SIGNATURE GUARANTEE
(IF REQUIRED BY INSTRUCTION 4)

Signature(s) Guaranteed by an Eligible Institution:_____________________________


(Authorized Signature)


(Title)


(Name of Firm)


(Area Code and Telephone Number)

Dated: _______________________, 1997

7

   SPECIAL ISSUANCE INSTRUCTIONS             SPECIAL DELIVERY INSTRUCTIONS

    (SEE INSTRUCTIONS 4 AND 5)                (SEE INSTRUCTIONS 4 AND 5)


  To be completed ONLY if                   To be completed ONLY if
certificates for Private                  certificates for Private
Debentures due 2027 not exchanged         Debentures due 2027 not exchanged
and/or Exchange Debentures due            and/or Exchange Debentures due
2027 are to be issued in the name         2027 are to be sent to someone
of and sent to someone other than         other than the person or persons
the person or person(s) whose             whose signature(s) appear(s) on
signature(s) appear(s) on this            this Letter of Transmittal above
Letter of Transmittal above, or if        or to such person or persons at an
Private Debentures due 2027               address other than shown in the
delivered by book-entry transfer          box entitled "Description of
which are not accepted for                Private Debentures due 2027" on
exchange are to be returned by            this Letter of Transmittal above.
credit to an account maintained at
DTC other than the account
indicated above.


Issue Exchange Debentures due 2027        Mail Exchange Debentures due 2027
and/or Private Debentures due 2027        and/or Private Debentures due 2027
to:                                       to:

 Name_______________________________       Name_______________________________
       (Please Type or Print)                      (Please Type or Print)

     -------------------------------           -------------------------------
       (Please Type or Print)                      (Please Type or Print)

Address____________________________       Address____________________________

     ------------------------------            ------------------------------
             (Zip Code)                                  (Zip Code)

-----------------------------------
    Employer Identification or
      Social Security Number

  (Complete Substitute Form W-9)

[_]Credit unexchanged Private
   Debentures due 2027 delivered
   by book-entry transfer to the
   DTC account set forth below.

-----------------------------------
      (DTC Account Number, if
            applicable)

8

INSTRUCTIONS

FORMING PART OF THE TERMS AND CONDITIONS OF THE
EXCHANGE OFFER

1. DELIVERY OF THIS LETTER OF TRANSMITTAL AND CERTIFICATES.

This Letter to Transmittal is to be completed either if (a) Certificates are to be forwarded herewith or (b) tenders are to be made pursuant to the procedures for tender by book-entry transfer set forth in "The Exchange Offers--Procedures for Tendering Private Debentures" in the Prospectus and an Agent's Message is not delivered. Holders who are DTC Participants tendering by book-entry transfer must execute such tender through DTC's ATOP system. A holder using ATOP should transmit its acceptance to DTC on or prior to the Expiration Date. DTC will verify such acceptance, execute a book-entry transfer of the tendered Private Debentures due 2027 into the Exchange Agent's account at DTC and then send to the Exchange Agent a Book-Entry Confirmation, including an Agent's Message confirming that DTC has received an express acknowledgement from such holder that such holder has received and agrees to be bound by this Letter of Transmittal and that the Company may enforce this Letter of Transmittal against such holder. The Book-Entry Confirmation must be received by the Exchange Agent in order for the tender relating thereto to be effective. Book-entry transfer to DTC in accordance with DTC's procedure does not constitute delivery of the Book-Entry Confirmation to the Exchange Agent. Private Debentures due 2027 tendered hereby must be in denominations of $1,000 and integral multiples thereof.

If the tender is not made through ATOP, certificates representing Private Debentures due 2027, as well as this Letter of Transmittal (or facsimile thereof), properly completed and duly executed, with any required signature guarantees, and any other documents required by this Letter of Transmittal, must be received by the Exchange Agent at its address set forth herein on or prior to the Expiration Date in order for such tender to be effective.

Holders who wish to tender their Private Debentures due 2027 and (i) whose Private Debentures due 2027 are not immediately available, or (ii) cannot deliver their Private Debentures due 2027, this Letter of Transmittal or any other documents required hereby to the Exchange Agent prior to the Expiration Date or (iii) who cannot comply with the procedures for book-entry transfer on a timely basis must tender their Private Debentures due 2027 according to the guaranteed delivery procedures set forth in the Prospectus. Pursuant to such procedures: (i) such tender must be made through an Eligible Institution (as defined below); (ii) prior to the Expiration Date, the Exchange Agent must have received from the Eligible Institution a properly completed and duly executed Notice of Guaranteed Delivery, substantially in the form provided by the Company (by fax transmission, mail or hand delivery) setting forth the name and address of the holder, the certificate number(s) of such Private Debentures due 2027 (except in the case of book-entry tenders) and the principal amount of Private Debentures due 2027 tendered, stating that the tender is being made thereby and guaranteeing that, within three NYSE trading days after the Expiration Date, this Letter of Transmittal (or a copy hereof) together with the certificate(s) representing the Private Debentures due 2027 (except in the case of book-entry tenders) and any other required documents will be deposited by the Eligible Institution with the Exchange Agent; and
(iii) such properly completed and executed Letter of Transmittal (or a copy hereof), as well as all other documents required by this Letter of Transmittal and the certificate(s) representing all tendered Private Debentures due 2027 in proper form for transfer of a Book-Entry Confirmation with respect to such Private Debentures due 2027, must be received by the Exchange Agent within three NYSE trading days after the Expiration Date, all as provided in the Prospectus under the section entitled "The Exchange Offers--Guaranteed Delivery Procedures." Any holder who wishes to tender his Private Debentures due 2027 pursuant to the guaranteed delivery procedures described above must ensure that the Exchange Agent receives the Notice of Guaranteed Delivery prior to the Expiration Date. As used in this Letter of Transmittal, "Eligible Institution" shall mean a firm which is a member of a registered national securities exchange or a member of the National Association of Securities Dealers, Inc. or a commercial bank or trust company having an office or correspondent in the United States.

All questions as to the validity, eligibility (including time of receipt), acceptance and withdrawal of tendered Private Debentures due 2027 will be determined by the Company in its sole discretion, which determination will be final and binding. The Company reserves the absolute right to reject any and all Private Debentures due 2027

9

not properly tendered or any Private Debentures due 2027 the Company's acceptance of which would, in the opinion of counsel for the Company, be unlawful. The Company also reserves the right to waive any defects, irregularities or conditions of tender as to particular Private Debentures due 2027. The Company's interpretation of the terms and conditions of the Exchange Offer (including the instructions in this Letter of Transmittal) shall be final and binding on all parties. Unless waived, any defects or irregularities in connection with tenders of Private Debentures due 2027 must be cured within such time as the Company shall determine. Neither the Company, the Exchange Agent nor any other person shall be under any duty to give notification of defects or irregularities with respect to tenders of Private Debentures due 2027, nor shall any of them incur any liability for failure to give such notification. Tenders of Private Debentures due 2027 will not be deemed to have been made until such defects or irregularities have been cured or waived. Any Private Debentures due 2027 received by the Exchange Agent that are not properly tendered and as to which the defects or irregularities have not been cured or waived will be returned by the Exchange Agent to the tendering holders, unless otherwise provided in this Letter of Transmittal, as soon as practicable following the Expiration Date.

See "The Exchange Offers" in the Prospectus.

2. TENDER BY HOLDER.

Only a holder of Private Debentures due 2027 may tender such Private Debentures due 2027 in the Exchange Offer. Any beneficial owner whose Private Debentures due 2027 are registered in the name of a broker, dealer, commercial bank, trust company or other nominee and who wishes to tender should contact the registered holder promptly and instruct such registered holder to tender on behalf of such beneficial owner. If such beneficial owner wishes to tender on such owner's own behalf; such owner must, prior to completing and executing this Letter of Transmittal and delivering such owner's Private Debentures due 2027, either make appropriate arrangements to register ownership of the Private Debentures due 2027 in such owner's name or obtain a properly completed bond power from the registered holder. The transfer of registered ownership may take considerable time.

3. PARTIAL TENDERS AND WITHDRAWALS.

Tenders of Private Debentures due 2027 will be accepted only in denominations of $1,000 and integral multiples thereof. If less than all the Private Debentures due 2027 are to be tendered, the tendering holder(s) should fill in the aggregate principal amount of Private Debentures due 2027 to be tendered in the box above entitled "Description of Private Debentures due 2027--Principal Amount of Private Debentures due 2027 Tendered." A reissued certificate representing the balance of nontendered Private Debentures due 2027 will be sent to such tendering holder (except in the case of book-entry tenders), unless otherwise provided in the appropriate box on this Letter of Transmittal, promptly after the Expiration Date. ALL OF THE PRIVATE DEBENTURES DUE 2027 DELIVERED TO THE EXCHANGE AGENT WILL BE DEEMED TO HAVE BEEN TENDERED UNLESS OTHERWISE INDICATED.

Any holder who has tendered Private Debentures due 2027 may withdraw the tender by delivering written notice of withdrawal to the Exchange Agent prior to the Expiration Date. For a withdrawal to be effective, a written notice of withdrawal must be received by the Exchange Agent at its address set forth on the first page of this Letter of Transmittal. Any such notice of withdrawal must (i) specify the name of the person having tendered the Private Debentures due 2027 to be withdrawn (the "Depositor"), (ii) identify the Private Debentures due 2027 to be withdrawn (including the certificate number or numbers and principal amount of such Private Debentures due 2027 (except in the case of book-entry tenders)), (iii) be signed by the holder in the same manner as the original signature on this Letter of Transmittal by which such Private Debentures due 2027 were tendered (including any required signature guarantees) or be accompanied by documents of transfer sufficient to have the Trustee (as defined in the Prospectus) register the transfer of such Private Debentures due 2027 into the name of the person withdrawing the tender and
(iv) specify the name in which any such Private Debentures due 2027 are registered, if different from that of the Depositor. If Private Debentures due 2027 have been delivered or otherwise identified to the Exchange Agent, the name of the registered holder and the certificate numbers of the particular Private Debentures due 2027 withdrawn must also be furnished to the Exchange Agent as aforesaid prior to the physical release of the withdrawn Private Debentures due 2027. If the Private Debentures due 2027

10

have been tendered pursuant to the procedures for book-entry tender set forth in the Prospectus, a notice of withdrawal must specify, in lieu of certificate numbers, the name and account number at the DTC to be credited with the withdrawn Private Debentures due 2027. Private Debentures due 2027 properly withdrawn will thereafter be deemed not validly tendered for purposes of the Exchange Offer; provided, however, that withdrawn Private Debentures due 2027 may be retendered by again following one of the procedures herein at any time prior to the Expiration Date. All questions as to the validity, form and eligibility (including time of receipt) of any notice of withdrawal, will be determined by the Company, whose determinations will be final and binding on all parties. Neither the Company, the Exchange Agent nor any other person will be under any duty to give notification of any debts or irregularities in any notice of withdrawal or incur any liability for failure to give such notification. See "The Exchange Offers--Withdrawal Rights" in the Prospectus.

4. SIGNATURES ON THIS LETTER OF TRANSMITTAL; BOND POWERS AND ENDORSEMENTS; GUARANTEE OF SIGNATURE.

If this Letter of Transmittal is signed by the registered holder of the Private Debentures due 2027 tendered hereby, the signature must correspond exactly with the name as written on the face of the certificates (if applicable) without any change whatsoever.

If any tendered Private Debentures due 2027 are owned of record by two or more joint owners, all such owners must sign this Letter of Transmittal.

If any tendered Private Debentures due 2027 are registered in different names on several certificates, it will be necessary to complete, sign and submit as many separate copies of this Letter of Transmittal as there are different registrations of certificates.

When this Letter of Transmittal is signed by the registered holder or holders of the Private Debentures due 2027 specified herein and tendered hereby, no endorsements of certificates or separate bond powers are required. If, however, the Exchange Debentures due 2027 to be issued,or any untendered Private Debentures due 2027 are to be reissued, to a person other than the registered holder, then endorsements of any certificates transmitted hereby or separate bond powers are required.

If this Letter of Transmittal is signed by a person other than the registered holder or holders of any certificate(s) specified herein, such certificate(s) must be endorsed or accompanied by appropriate bond powers, in either case signed exactly as the name or names of the registered holder(s) appear(s) on the certificate(s).

If this Letter of Transmittal or any certificates or bond powers are signed by trustees, executors, administrators, guardians, attorneys-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, such persons should so indicate when signing, and, unless waived by the Company, proper evidence satisfactory to the Company of their authority to so act must be submitted.

Endorsements on certificates for Private Debentures due 2027 or signatures on bond powers required by this Instruction 4 must be guaranteed by an Eligible Institution.

Signatures on this Letter of Transmittal need not be guaranteed by an Eligible Institution, provided the Private Debentures due 2027 are tendered:
(i) by a registered holder of such Private Debentures due 2027 (which term, for purposes of the Exchange Offer, includes any participant in the DTC system whose name appears on a security position listing as the holder of such Private Debentures due 2027) who has not completed the box entitled "Special Issuance Instructions" or "Special Delivery Instructions" on this Letter of Transmittal; or (ii) for the account of an Eligible Institution.

5. SPECIAL ISSUANCE AND DELIVERY INSTRUCTIONS.

Tendering holders of Private Debentures due 2027 should indicate in the applicable box the name and address in or to which Exchange Debentures due 2027 issued pursuant to the Exchange Offer and/or substitute certificates evidencing Private Debentures due 2027 not exchanged are to be issued or sent, if different from the name or address of the person signing this Letter of Transmittal. In the case of issuance in a different name, the employer identification or social security number of the person named must also be indicated. Holders tendering Private Debentures due 2027 by book-entry transfer may request that Private Debentures due 2027 not exchanged

11

be credited to such account maintained at the DTC as such holder may designate hereon. If no such instructions are given, such Private Debentures due 2027 not exchanged will be returned to the name or address of the person signing this Letter of Transmittal.

6. TRANSFER TAXES.

The Company will pay all transfer taxes, if any, applicable to the transfer of Private Debentures due 2027 to them or their order pursuant to the Exchange Offer. If however, Exchange Debentures due 2027 and/or substitute Private Debentures due 2027 not exchanged are to be delivered to, or are to be registered or issued in the name of, any person other than the registered holder of the Private Debentures due 2027 tendered hereby, or if tendered Private Debentures due 2027 are registered in the name of any person other than the person signing this Letter of Transmittal, or if a transfer tax is imposed for any reason other than the transfer of Private Debentures due 2027 to the Company or their order pursuant to the Exchange Offer, the amount of any such transfer taxes (whether imposed on the registered holder or any other persons) will be payable by the tendering holder. If satisfactory evidence or payment of such taxes or exemption therefrom is not submitted herewith, the amount of such transfer taxes will be billed directly to such tendering holder.

Except as provided in this Instruction 6, it will not be necessary for transfer tax stamps to be affixed to the Private Debentures due 2027 specified in this Letter of Transmittal.

7. WAIVER OF CONDITION.

Subject to the terms and conditions set forth in the Prospectus, the Company reserves the absolute right to waive satisfaction of any or all conditions enumerated in the Prospectus.

8. NO CONDITIONAL TENDERS.

No alternative, conditional, irregular or contingent tenders will be accepted. All tendering holders of Private Debentures due 2027, by execution of this Letter of Transmittal, shall waive any right to receive notice of the acceptance of their Private Debentures due 2027 for exchange.

Neither the Company nor any other person is obligated to give notice of defects or irregularities in any tender, nor shall any of them incur any liability for failure to give any such notice.

9. MUTILATED, LOST, STOLEN OR DESTROYED PRIVATE DEBENTURES DUE 2027.

Any holder whose Private Debentures due 2027 have been mutilated, lost, stolen or destroyed should contact the Exchange Agent at the address indicated above for further instructions.

10. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.

QUESTIONS RELATING TO THE PROCEDURE FOR TENDERING, AS WELL AS REQUESTS FOR ADDITIONAL COPIES OF THE PROSPECTUS AND THIS LETTER OF TRANSMITTAL, MAY BE DIRECTED TO THE EXCHANGE AGENT, AT THE ADDRESS INDICATED ON THE FIRST PAGE OF THIS LETTER OF TRANSMITTAL OR BY TELEPHONE AT (212) 240-8801.

12

IMPORTANT TAX INFORMATION

Under U.S. federal income tax laws, a registered holder of Private Debentures due 2027 or Exchange Debentures due 2027 is required to provide the Trustee (as payor) with such holder's correct Taxpayer Identification Number ("TIN") on Substitute Form W-9 below or otherwise establish a basis for exemption from backup withholding. If such holder is an individual, the TIN is his social security number. If the Trustee is not provided with the correct TIN, a $50 penalty may be imposed by the Internal Revenue Service, and payments made to such holder with respect to Private Debentures due 2027 or Exchange Debentures due 2027 may be subject to backup withholding.

Certain holders (including, among others, all corporations and certain foreign persons) are not subject to these backup withholding and reporting requirements. Exempt holders should indicate their exempt status on Substitute Form W-9. A foreign person may qualify as an exempt recipient by submitting to the Trustee a properly completed Internal Revenue Service Form W-8, signed under penalties of perjury, attesting to that holder's exempt status. A Form W-8 can be obtained from the Trustee.

If backup withholding applies, the Trustee is required to withhold 31% of any payments made to the holder or other payee. Backup withholding is not an additional U.S. federal income tax. Rather, the U.S. federal income tax liability of persons subject to backup withholding will be reduced by the amount of tax withheld. If withholding results in an overpayment of taxes, a refund may be obtained from the Internal Revenue Service.

PURPOSE OF SUBSTITUTE FORM W-9

To prevent backup withholding on payments made with respect to Private Debentures due 2027 or Exchange Debentures due 2027 the holder is required to provide the Trustee with: (i) the holder's correct TIN by completing the form below, certifying that the TIN provided on Substitute Form W-9 is correct (or that such holder is awaiting a TIN) and that (A) such holder is exempt from backup withholding, (B) the holder has not been notified by the Internal Revenue Service that the holder is subject to backup withholding as a result of failure to report all interest or dividends or (C) the Internal Revenue Service has notified the holder that the holder is no longer subject to backup withholding; and (ii) if applicable, an adequate basis for exemption.

13

TO BE COMPLETED BY ALL TENDERING HOLDERS

(SEE "IMPORTANT TAX INFORMATION" ABOVE)

PAYER'S NAME: THE FIRST NATIONAL BANK OF CHICAGO

PART 1--PLEASE PROVIDE YOUR TIN:__________________

                       TIN IN THE BOX AT RIGHT AND        Social Security
                       CERTIFY BY SIGNING AND                Number or
SUBSTITUTE             DATING BELOW.                          Employee
                                                       Identification Number
                      --------------------------------------------------------
FORM W-9               PART 2--CERTIFICATION--Under          PART 3
                       penalties of perjury, I certify
                       that:


DEPARTMENT OF THE                                            Awaiting TIN [_]
TREASURY

INTERNAL REVENUE       (1) The number shown on this form
SERVICE                    is my correct Taxpayer
                           Identification Number (or I am
                           waiting for a number to be
                           issued to me) and

PAYER'S REQUEST FOR
TAXPAYER

IDENTIFICATION
NUMBER (TIN)           (2) I am not subject to backup
                           withholding because (i) I am
                           exempt from backup
                           withholding, (ii) I have not

been notified by the Internal Revenue Service ("IRS") that I am subject to backup withholding as a result of a failure to report all interest or dividends, or (iii) the IRS has notified me that I am no longer subject to backup withholding.

Certificate Instructions--You must cross out item
(2) above if you have been notified by the IRS that you are currently subject to backup withholding because of underreporting interest or dividends on your tax return. However, if after being notified by the IRS that you were subject to backup withholding you received another notification from the IRS stating that you are no longer subject to backup withholding, do not cross out such item (2).

SIGNATURE ___________________________________________ DATE_________________________________________________ NAME_________________________________________________


(Please Print)

NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY IN CERTAIN CIRCUMSTANCES
RESULT IN BACKUP WITHHOLDING OF 31% OF ANY AMOUNTS PAID TO YOU PURSUANT TO THE EXCHANGE OFFER. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.

14

YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART 3 OF SUBSTITUTE FORM W-9.

PART 3 OF SUBSTITUTE FORM W-9.
CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

I certify under penalties of perjury that a taxpayer identification number has not been issued to me, and either (a) I have mailed or delivered an application to receive a taxpayer identification number to the appropriate Internal Revenue Service Center or Social Security Administration Office or
(b) I intend to mail or deliver an application in the near future. I understand that if I do not provide a taxpayer identification number by the time of payment, 31% of all payments made to me on account of the Debentures due 2027 shall be retained until I provide a taxpayer identification number to the Exchange Agent and that, if I do not provide my taxpayer identification number within 60 days, such retained amounts shall be remitted to the Internal Revenue Service as backup withholding and 31% of all reportable payments made to me thereafter will be withheld and remitted to the Internal Revenue Service until I provide a taxpayer identification number.


Signature(s) Date

IMPORTANT: THIS LETTER OF TRANSMITTAL OR A COPY HEREOF (TOGETHER WITH THE CERTIFICATES FOR PRIVATE DEBENTURES DUE 2027 (IF APPLICABLE) AND ALL OTHER REQUIRED DOCUMENTS) MUST BE RECEIVED BY THE EXCHANGE AGENT PRIOR TO THE EXPIRATION DATE.

15

Exhibit 99.4

NOTICE OF GUARANTEED DELIVERY FOR
MCKESSON CORPORATION

This form or one substantially equivalent hereto must be used to accept the Exchange Offers of McKesson Corporation (the "Company") made pursuant to the Prospectus, dated , 1997 (the "Prospectus"), if certificates for the outstanding 6.60% Notes due March 1, 2000, 6 7/8% Notes due March 1, 2002 and 7.65% Debentures due March 1, 2027 of the Company (the "Private Notes") are not immediately available or if the procedure for book-entry transfer cannot be completed on a timely basis or time will not permit all required documents to reach the Company prior to 5:00 p.m., New York City time, on the Expiration Date of the Exchange Offers. Such form may be delivered or transmitted by telegram, telex, facsimile transmission, mail or hand delivery to The First National Bank of Chicago (the "Exchange Agent") as set forth below. In addition, in order to utilize the guaranteed delivery procedure to tender Private Notes pursuant to the Exchange Offers, completed, signed and dated applicable Letters of Transmittal (or facsimiles thereof) must also be received by the Exchange Agent prior to 5:00 p.m., New York City time, on the Expiration Date. Capitalized terms not defined herein are defined in the Prospectus.

Delivery To: The First National Bank of Chicago, Exchange Agent

             By Mail:                       By Hand or Overnight Delivery:
   (Registered or Certified Mail
           recommended)

                                          The First National Bank of Chicago
The First National Bank of Chicago              c/o First Chicago Trust
      c/o First Chicago Trust                     Company of New York
        Company of New York                         14 Wall Street
          14 Wall Street                          8th Floor, Window 2
        8th Floor, Window 2                    New York, New York 10005
     New York, New York 10005

Facsimile Transmissions:

(Eligible Institutions Only)

(212) 240-8938

To Confirm by Telephone
or for Information Call:

(212) 240-8801

DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE OTHER THAN AS SET FORTH ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.

THIS NOTICE OF GUARANTEED DELIVERY IS NOT TO BE USED TO GUARANTEE SIGNATURES. IF A SIGNATURE ON A LETTER OF TRANSMITTAL IS REQUIRED TO BE GUARANTEED BY AN "ELIGIBLE INSTITUTION" UNDER THE INSTRUCTIONS THERETO, SUCH SIGNATURE GUARANTEE MUST APPEAR IN THE APPLICABLE SPACE PROVIDED IN THE SIGNATURE BOX ON SUCH LETTER OF TRANSMITTAL.


Ladies and Gentlemen:

Upon the terms and conditions set forth in the Prospectus and the accompanying Letters of Transmittal, the undersigned hereby tenders to the Company the principal amount of Private Notes set forth below, pursuant to the guaranteed delivery procedure described in "The Exchange Offers--Guaranteed Delivery Procedures" section of the Prospectus.

Principal Amount of 6.60% Notes due
March 1, 2000 Tendered:*

$ ___________________________________

                                          If 6.60% Notes due March 1, 2000
_____________________________________     will be delivered by book-entry
Certificate Nos. (if available)           transfer to The Depository Trust
                                          Company, provide account number.

Total Principal Amount Represented
 by Certificate(s) for 6.60% Notes
 due March 1, 2000 :

                                          Account Number: _____________________
$ ___________________________________

Principal Amount of 6 7/8% Notes due
 March 1, 2002 Tendered:


$ ___________________________________     If 6 7/8% Notes due March 1, 2002
                                          will be delivered by book-entry
                                          transfer to The Depository Trust
                                          Company, provide account number
_____________________________________
Certificate Nos. (if available)

Total Principal Amount Represented
 by Certificate(s) for 6 7/8% Notes
 due March 1, 2002:

                                          Account Number: _____________________
$ ___________________________________

Principal Amount of 7.65% Debentures
 due March 1, 2027 Tendered:
                                          If 7.65% Debentures due March 1,
$ ___________________________________     2027 will be delivered by book-entry
                                          transfer to The Depository Trust
_____________________________________     Company, provide account number.
Certificate Nos. (if available)

Total Principal Amount Represented
 by Certificate(s) for 7.65%
 Debentures due March 1, 2027:            Account Number: _____________________

$ ___________________________________


--------

* Must be denominations of principal amount of $1,000 and any integral multiple thereof.



ALL AUTHORITY HEREIN CONFERRED OR AGREED TO BE CONFERRED SHALL SURVIVE THE DEATH OR INCAPACITY OF THE UNDERSIGNED AND EVERY OBLIGATION OF THE UNDERSIGNED HEREUNDER SHALL BE BINDING UPON THE HEIRS, PERSONAL REPRESENTATIVES, SUCCESSORS AND ASSIGNS OF THE UNDERSIGNED.


                                PLEASE SIGN HERE

X ___________________________________     ____________

X ___________________________________     ____________
      Signature(s) of Owner(s)                Date
       or Authorized Signatory

Area Code and Telephone Number: ______________

This Notice of Guaranteeed Delivery must be signed by the holder(s) of Private Notes as their name(s) appear(s) on certificates for Private Notes or on a security position listing, or by person(s) authorized to become registered holder(s) by endorsement and documents transmitted with this Notice of Guaranteed Delivery. If signature is by a trustee, executor, administrator, guardian, attorney-in-fact, officer or other person acting in a fiduciary or representative capacity, such person must set forth his or her full title below.

PLEASE PRINT NAME(S) AND ADDRESS(ES)

Name(s):________________________________________________________________________



Capacity:_______________________________________________________________________

Address(es):____________________________________________________________________




GUARANTEE
(NOT TO BE USED FOR SIGNATURE GUARANTEE)

The undersigned, a member of a registered national securities exchange, or a member of the National Association of Securities Dealers, Inc., or a commercial bank or trust company having an office or correspondent in the United States, hereby guarantees that the certificates representing the principal amount of Private Notes tendered hereby in proper form for transfer, or timely confirmation of the book-entry transfer of such Private Notes into the Exchange Agent's account at The Depository Trust Company pursuant to the procedures set forth in "The Exchange Offers--Guaranteed Delivery Procedures" section of the Prospectus, together with properly completed and duly executed Letters of Transmittal (or a manually signed facsimile thereof) with any required signature guarantee and any other documents required by the Letters of Transmittal, will be received by the Exchange Agent at the address set forth above, no later than three New York Stock Exchange trading days after the date of execution hereof.

_____________________________________       ___________________________________
            Name of Firm                           Authorized Signature


_____________________________________       ___________________________________
               Address                                     Title


_____________________________________       Name: _____________________________
                             Zip Code            (Please Type or Print)


Area Code and Tel. No. ______________       Dated: ____________________________

NOTE: DO NOT SEND CERTIFICATES FOR PRIVATE NOTES WITH THIS FORM. CERTIFICATES

FOR PRIVATE NOTES SHOULD ONLY BE SENT WITH YOUR LETTERS OF TRANSMITTAL.


Exhibit 99.5

MCKESSON CORPORATION

OFFERS FOR ALL OUTSTANDING
6.60% NOTES DUE MARCH 1, 2000,
6 7/8% NOTES DUE MARCH 1, 2002 AND
7.65% DEBENTURES DUE MARCH 1, 2027
IN EXCHANGE FOR
6.60% EXCHANGE NOTES DUE MARCH 1, 2000,

6 7/8% EXCHANGE NOTES DUE MARCH 1, 2002 AND 7.65% EXCHANGE DEBENTURES DUE MARCH 1, 2027

TO:BROKERS, DEALERS, COMMERCIAL BANKS,
TRUST COMPANIES AND OTHER NOMINEES:

McKesson Corporation (the "Company") is offering, upon and subject to the terms and conditions set forth in the Prospectus, dated , 1997 (the "Prospectus"), and the enclosed Letters of Transmittal (the "Letters of Transmittal"), to exchange (the "Exchange Offers") its 6.60% Exchange Notes due March 1, 2000, 6 7/8% Exchange Notes due March 1, 2002 and 7.65% Exchange Debentures due March 1, 2027, which have been registered under the Securities Act of 1933, as amended (the "Exchange Notes"), for its outstanding 6.60% Notes due March 1, 2000, 6 7/8% Notes due March 1, 2002 and 7.65% Debentures due March 1, 2027 (the "Private Notes"), respectively. The Exchange Offers are being made in order to satisfy certain obligations of the Company contained in the Registration Rights Agreement dated March 11, 1997, by and among the Company and the initial purchasers referred to therein.

We are requesting that you contact your clients for whom you hold Private Notes regarding the Exchange Offers. For your information and for forwarding to your clients for whom you hold Private Notes registered in your name or in the name of your nominee, or who hold Private Notes registered in their own names, we are enclosing the following documents:

1. Prospectus dated , 1997;

2. Each of the three Letters of Transmittal for your use and for the information of your clients;

3. A Notice of Guaranteed Delivery to be used to accept the Exchange Offers if certificates for Private Notes are not immediately available or time will not permit all required documents to reach the Exchange Agent prior to the Expiration Date (as defined below) or if the procedure for book-entry transfer cannot be completed on a timely basis;

4. A form of letter which may be sent to your clients for whose account you hold Private Notes registered in your name or the name of your nominee, with space provided for obtaining such clients' instructions with regard to the Exchange Offers;

5. Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9; and

6. Return envelopes addressed to The First National Bank of Chicago, the Exchange Agent for the Private Notes.

YOUR PROMPT ACTION IS REQUESTED. THE EXCHANGE OFFERS WILL EXPIRE AT 5:00 P.M, NEW YORK CITY TIME, ON , , 1997, UNLESS EXTENDED BY THE COMPANY (THE "EXPIRATION DATE"). PRIVATE NOTES TENDERED PURSUANT TO THE EXCHANGE OFFERS MAY BE WITHDRAWN AT ANY TIME BEFORE THE EXPIRATION DATE.

To participate in the Exchange Offers, your clients must tender by having you execute for them a book-entry transfer of tendered Private Notes into the account of The First National Bank of Chicago, as Exchange Agent, at The Depository Trust Company ("DTC") using DTC's Automated Tender Offer Program. (Your clients may also tender by having certificates representing the Private Notes, duly executed and properly completed


applicable Letters of Transmittal (or facsimile thereof), with any required signature guarantees, and any other required documents delivered to such Exchange Agent.) The Letters of Transmittal and the Prospectus should be consulted for complete instructions and information about participation in the Exchange Offer.

If holders of Private Notes wish to tender, but it is impracticable for them to forward their certificates for Private Notes prior to the expiration of the Exchange Offers or to comply with the book-entry transfer procedures on a timely basis, a tender may be effected by following the guaranteed delivery procedures described in the Prospectus under "The Exchange Offers--Guaranteed Delivery Procedures."

The Company will, upon request, reimburse brokers, dealers, commercial banks and trust companies for reasonable and necessary costs and expenses incurred by them in forwarding the Prospectus and the related documents to the beneficial owners of Private Notes held by them as nominee or in a fiduciary capacity. The Company will pay or cause to be paid all stock transfer taxes applicable to the exchange of Private Notes pursuant to the Exchange Offers, except as set forth in Instruction 6 of the applicable Letters of Transmittal.

Any inquiries you may have with respect to the Exchange Offers, or requests for additional copies of the enclosed materials, should be directed to The First National Bank of Chicago, the Exchange Agent for the Private Notes, at its address and telephone number set forth on the front of the Letters of Transmittal.

Very truly yours,

McKESSON CORPORATION

NOTHING HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU OR ANY PERSON AS AN AGENT OF THE COMPANY OR THE EXCHANGE AGENT, OR AUTHORIZE YOU OR ANY OTHER PERSON TO USE ANY DOCUMENT OR MAKE ANY STATEMENTS ON BEHALF OF EITHER OF THEM WITH RESPECT TO THE EXCHANGE OFFERS, EXCEPT FOR STATEMENTS EXPRESSLY MADE IN THE PROSPECTUS OR THE APPLICABLE LETTERS OF TRANSMITTAL.

Enclosures

2

Exhibit 99.6

MCKESSON CORPORATION

OFFERS FOR ALL OUTSTANDING
6.60% NOTES DUE MARCH 1, 2000,
67/8% NOTES DUE MARCH 1, 2002 AND
7.65% DEBENTURES DUE MARCH 1, 2027
IN EXCHANGE FOR
6/60% EXCHANGE NOTES DUE MARCH 1, 2000,

67/8% EXCHANGE NOTES DUE MARCH 1, 2002 AND 7.65% EXCHANGE DEBENTURES DUE MARCH 1, 2027

TO OUR CLIENTS:

Enclosed for your consideration is a Prospectus, dated , 1997 (the "Prospectus"), and the related Letters of Transmittal (the "Letters of Transmittal"), relating to the offers (the "Exchange Offers") of McKesson Corporation (the "Company") to exchange its 6.60% Exchange Notes due March 1, 2000, 6 7/8% Exchange Notes due March 1, 2002 and 7.65% Exchange Debentures due March 1, 2027, which have been registered under the Securities Act of 1933, as amended (the "Exchange Notes"), for its outstanding 6.60% Notes due March 1, 2000, 6 7/8% Notes due March 1, 2002 and 7.65% Debentures due March 1, 2027 (the "Private Notes"), respectively, upon the terms and subject to the conditions described in the Prospectus and the applicable Letters of Transmittal. The Exchange Offers are being made in order to satisfy certain obligations of the Company contained in the Registration Rights Agreement dated March 11, 1997, by and among the Company and the initial purchasers referred to therein.

This material is being forwarded to you as the beneficial owner of the Private Notes carried by us in your account but not registered in your name. A TENDER OF SUCH PRIVATE NOTES MAY ONLY BE MADE BY US AS THE HOLDER OF RECORD AND PURSUANT TO YOUR INSTRUCTIONS.

Accordingly, we request instructions as to whether you wish us to tender on your behalf any or all of the Private Notes held by us for your account, pursuant to the terms and conditions set forth in the enclosed Prospectus and applicable Letters of Transmittal.

Your instructions should be forwarded to us as promptly as possible in order to permit us to tender your Private Notes on your behalf in accordance with the provisions of the Exchange Offers. The Exchange Offers will expire at 5:00
p.m., New York City time, on , , 1997, unless extended by the Company. Any Private Notes tendered pursuant to the Exchange Offers may be withdrawn at any time before the Expiration Date.

Your attention is directed to the following:

1. The Exchange Offers are for any and all Private Notes.

2. The Exchange Offers are subject to certain conditions set forth in the Prospectus in the section captioned "The Exchange Offers--Certain Conditions to the Exchange Offers."

3. Any transfer taxes incident to the transfer of Private Notes from the holder to the Company will be paid by the Company, except as otherwise provided in the Instructions in the applicable Letters of Transmittal.

4. The Exchange Offers expire at 5:00 p.m., New York City time, on , , 1997, unless extended by the Company.

If you wish to have us tender any or all of your Private Notes, please so instruct us by completing, executing and returning to us the instruction form on the back of this letter. THE LETTERS OF TRANSMITTAL ARE FURNISHED TO YOU FOR INFORMATION ONLY AND MAY NOT BE USED DIRECTLY BY YOU TO TENDER YOUR PRIVATE NOTES.


INSTRUCTIONS WITH RESPECT TO
THE EXCHANGE OFFERS

The undersigned acknowledge(s) receipt of your letter and the enclosed material referred to therein relating to the Exchange Offers made by McKesson Corporation with respect to its Private Notes.

This will instruct you to tender the Private Notes held by you for the account of the undersigned, upon and subject to the terms and conditions set forth in the Prospectus and the related applicable Letters of Transmittal.

Please tender the Private Notes held by you for my account as indicated below:

AGGREGATE PRINCIPAL AMOUNT OF
PRIVATE NOTES

6.60% Notes due March 1, 2000

6 7/8% Notes due March 1, 2002 -------------------------------

7.65% Debentures due March 1, 2027

[_] Please do not tender any Private Notes held by you for my account

Dated:               , 1997
                                            ---------------------------------

                                            -------------------------------
                                                       Signature(s)

                                            -------------------------------

                                            -------------------------------


Please print name(s) here



Address(es)


Area Code and Telephone Number


Tax Identification or Social Security No(s).

None of the Private Notes held by us for your account will be tendered unless we receive written instructions from you to do so. Unless a specific contrary instruction is given in the space provided, your signature(s) hereon shall constitute an instruction to us to tender all the Private Notes held by us for

your account.


Exhibit 99.7

July , 1997

The First National Bank of Chicago
One First National Plaza
Suite 0126
Chicago, Illinois 60670-0126

Attention: Corporate Trust Services Division

Ladies and Gentlemen:

McKesson Corporation, a Delaware corporation (the "Company") proposes to make an offer (the "Exchange Offer") to exchange any and all of its outstanding 6.60% Notes due March 1, 2000, 6 7/8% Notes due March 1, 2002 and 7.65% Debentures due March 1, 2027 (together the "Private Notes") for its 6.60% Exchange Notes due March 1, 2000, 6 7/8% Exchange Notes due March 1, 2002 and 7.65% Debentures due March 1, 2027 (together the "Exchange Notes"). The terms and conditions of the Exchange Offer as currently contemplated are set forth in a prospectus, dated July , 1997 (the "Prospectus"), to be distributed to all record holders of the Private Notes. A copy of the Prospectus is attached hereto as Exhibit A. The Private Notes and the Exchange Notes are collectively referred to herein as the "Notes." Capitalized terms used but not defined herein shall have the same meaning given them in the Prospectus.

A copy of each of the form of the Letter of Transmittal, the form of the Notice of Guaranteed Delivery, the form of Letter to Brokers, Dealers and the form of Letter to Clients is attached hereto as Exhibit B.

The Company hereby appoints The First National Bank of Chicago to act as exchange agent (the "Exchange Agent") in connection with the Exchange Offer. References hereinafter to "you" shall refer to The First National Bank of Chicago.

The Exchange Offer is expected to be commenced by the Company on or about July , 1997. The Letter of Transmittal accompanying the Prospectus (or in the case of book entry securities, the ATOP system) is to be used by the holders of the Private Notes to accept the Exchange Offer and contains instructions with respect to (i) the delivery of certificates for Private Notes tendered in connection therewith and (ii) the book entry transfer of Notes to the Exchange Agent's account.

The Exchange Offer shall expire at 5:00 P.M., New York City time, on August , 1997 or on such later date or time to which the Company may extend the Exchange Offer (the "Expiration Date"). Subject to the terms and conditions set forth in the Prospectus, the Company expressly reserves the right to extend the Exchange Offer from time to time by giving oral (to be confirmed in writing) or written notice to you before 9:00 A.M., New York City time, on the Business Day following the previously scheduled Expiration Date.


The Company expressly reserves the right to amend or terminate the Exchange Offer, and not to accept for exchange any Private Notes not theretofore accepted for exchange, upon the occurrence of any of the conditions of the Exchange Offer specified in the Prospectus under the caption "The Exchange Offer--Certain Conditions to the Exchange Offer." The Company will give you prompt oral (confirmed in writing) or written notice of any amendment, termination or nonacceptance of Private Notes.

In carrying out your duties as Exchange Agent, you are to act in accordance with the following instructions:

1. You will perform such duties and only such duties as are specifically set forth in the section of the Prospectus captioned "The Exchange Offer" or as specifically set forth herein; provided, however, that in no way will your general duty to act in good faith be discharged by the foregoing.

2. You will establish an account with respect to the Private Notes at The Depository Trust Company (the "Book-Entry Transfer Facility") for purposes of the Exchange Offer within two Business Days after the date of the Prospectus, and any financial institution that is a participant in the Book-Entry Transfer Facility's system may make book-entry delivery of the Private Notes by causing the Book-Entry Transfer Facility to transfer such Private Notes into your account in accordance with the Book-Entry Transfer Facility's procedure for such transfer.

3. You are to examine each of the Letters of Transmittal and certificates for Private Notes (or confirmation of book-entry transfer into your account at the Book-Entry Transfer Facility) and any other documents delivered or mailed to you by or for holders of the Private Notes to ascertain whether: (i) the Letters of Transmittal and any such other documents are duly executed and properly completed in accordance with instructions set forth therein and (ii) the Private Notes have otherwise been properly tendered. In each case where the Letter of Transmittal or any other document has been improperly completed or executed or any of the certificates for Private Notes are not in proper form for transfer or some other irregularity in connection with the acceptance of the Exchange Offer exists, you will endeavor to inform such holders of the need for fulfillment of all requirements and to take any other action as may be necessary or advisable to cause such irregularity to be corrected.

4. With the approval of any person designated in writing by the Company (a "Designated Officer") (such approval, if given orally, to be confirmed in writing) or any other party designated by any such Designated Officer in writing, you are authorized to waive any irregularities in connection with any tender of Private Notes pursuant to the Exchange Offer.

5. Tenders of Private Notes may be made only as set forth in the Letter of Transmittal and in the section of the Prospectus captioned "The Exchange Offer--Procedures for Tendering Private Notes," and Private Notes shall be considered properly tendered to you only when tendered in accordance with the procedures set forth therein.

Notwithstanding the provisions of this paragraph 5, Private Notes which any Designated Officer of the Company shall approve as having been properly tendered shall be considered to be properly tendered. Such approval, if given orally, shall be confirmed in writing.

6. You shall advise the Company with respect to any Private Notes received subsequent to the Expiration Date and accept its instructions with respect to disposition of such Private Notes.

2

7. You shall accept tenders:

(a) in cases where the Private Notes are registered in two or more names only if signed by all named holders;

(b) in cases where the signing person (as indicated on the Letter of Transmittal) is acting in a fiduciary or a representative capacity only when proper evidence of such person's authority so to act is submitted; and

(c) from persons other than the registered holder of Private Notes provided that customary transfer requirements, including satisfaction of any applicable transfer taxes, are fulfilled.

You shall accept partial tenders of Private Notes where so indicated and as permitted in the Letter of Transmittal and deliver certificates for Private Notes to the transfer agent for division and return any untendered Private Notes to the holder (or such other person as may be designated in the Letter of Transmittal) as promptly as practicable after expiration or termination of the Exchange Offer.

8. Upon satisfaction or waiver of all of the conditions to the Exchange Offer, the Company will notify you (such notice, if given orally, to be confirmed in writing) of its acceptance, promptly after the Expiration Date, of all Private Notes properly tendered and you, on behalf of the Company, will exchange such Private Notes for Exchange Notes and cause such Private Notes to be canceled. Delivery of Exchange Notes will be made on behalf of the Company by you at the rate of $1,000 principal amount of Exchange Notes for each $1,000 principal amount of the corresponding series of Private Notes tendered promptly after notice (such notice, if given orally, to be confirmed in writing) of acceptance of said Private Notes by the Company; provided, however, that in all cases, Private Notes tendered pursuant to the Exchange Offer will be exchanged only after timely receipt by you of certificates for such Private Notes (or confirmation of book-entry transfer into your account at the Book-Entry Transfer Facility), a properly completed and duly executed Letter of Transmittal (or facsimile thereof) with any required signature guarantees and any other required documents. You shall issue Exchange Notes only in denominations of $1,000 or any integral multiple thereof. Private Notes may be tendered in denominations of $1,000 or any integral multiple thereof.

9. Tenders pursuant to the Exchange Offer are irrevocable, except that, subject to the terms and upon the conditions set forth in the Prospectus and the Letter of Transmittal, Private Notes tendered pursuant to the Exchange Offer may be withdrawn at any time on or prior to the Expiration Date.

10. The Company shall not be required to exchange any Private Notes tendered if any of the conditions set forth in the Exchange Offer are not met. Notice of any decision by the Company not to exchange any Private Notes tendered shall be given orally (and confirmed in writing) by the Company to you.

11. If, pursuant to the Exchange Offer, the Company does not accept for exchange all or part of the Private Notes tendered because of an invalid tender, the occurrence of certain other events set forth in the Prospectus under the caption "The Exchange Offer--Certain Conditions to the Exchange Offer" or otherwise, you shall promptly after the expiration or termination of the Exchange Offer return those certificates for unaccepted Private Notes (or effect appropriate book-entry transfer), together with any related required documents and the Letters of Transmittal relating thereto that are in your possession, to the persons who deposited them.

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12. All certificates for reissued Private Notes unaccepted Private Notes or for Exchange Notes shall be forwarded (a) by first-class certified mail, return receipt requested, under a blanket surety bond protecting you and the Company from loss or liability arising out of the non-receipt or non-delivery of such certificates; (b) by registered mail insured separately for the replacement value of each of such certificates or (c) by effectuating appropriate book-entry transfer.

13. You are not authorized to pay or offer to pay any concessions, commissions or solicitation fees to any broker, dealer, bank or other persons or to engage or utilize any person to solicit tenders.

14. As Exchange Agent hereunder you:

(a) shall have no duties or obligations other than those specifically set forth in the section of the Prospectus captioned "The Exchange Offer," the Letter of Transmittal or herein or as may be subsequently agreed to in writing by you and the Company;

(b) will be regarded as making no representations and having no responsibilities as to the validity, sufficiency, value or genuineness of any of the certificates or the Private Notes represented thereby deposited with you pursuant to the Exchange Offer, and will not be required to and will make no representation as to the validity, value or genuineness of the Exchange Offer or the Letter of Transmittal or any other disclosure materials delivered in connection therewith;

(c) shall not be obligated to take any legal action hereunder which might in your reasonable judgment involve any expense or liability, unless you shall have been furnished with indemnity reasonably satisfactory to you;

(d) may reasonably rely on and shall be protected in acting in reliance upon any certificate, instrument, opinion, notice, letter, telegram or other document or security delivered to you and reasonably believed by you to be genuine and to have been signed by the proper party or parties;

(e) may reasonably act upon any tender, statement, request, agreement or other instrument whatsoever not only as to its due execution and validity and effectiveness of its provisions, but also as to the truth and accuracy of any information contained therein, which you shall in good faith believe to be genuine or to have been signed or represented by a proper person or persons;

(f) may rely on and shall be protected in acting upon written or oral instructions from any Designated Officer of the Company;

(g) may consult with counsel satisfactory to you, including counsel for the Company, with respect to any questions relating to your duties and responsibilities and the advice or opinion of such counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted to be taken by you hereunder in good faith and in accordance with the advice or opinion of such counsel, provided that you shall promptly notify the Company of any action taken or omitted by you in reliance upon such advice or opinion; and

(h) shall not advise any person tendering Private Notes pursuant to the Exchange Offer as to the wisdom of making such tender or as to the market value or decline or appreciation in market value of any Private Notes.

15. You shall take such action as may from time to time be requested by the Company or its counsel (and such other action as you may reasonably deem appropriate) to furnish copies of the Prospectus, Letter of Transmittal and the Notice of Guaranteed Delivery or such other forms as may be approved from time to time by the Company, to all persons requesting such documents and to

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accept and comply with telephone requests for information relating to the Exchange Offer, provided that such information shall relate only to the procedures for accepting (or withdrawing from) the Exchange Offer. The Company will furnish you with copies of such documents at your request. All other requests for information relating to the Exchange Offer shall be directed to the Company, Attention: Nancy A. Miller.

16. You shall advise by facsimile transmission or telephone, and promptly thereafter confirm in writing to Nancy A. Miller of the Company, and such other person or persons as the Company may request, daily (and more frequently during the week immediately preceding the Expiration Date and if otherwise requested) up to and including the Expiration Date, as to the number of Private Notes which have been tendered pursuant to the Exchange Offer and the items received by you pursuant to this Agreement, separately reporting and giving cumulative totals as to items properly received and items improperly received. In addition, you will also inform, and cooperate in making available to, the Company or any such other person or persons, upon oral request made from time to time on or prior to the Expiration Date, such other information as it or such person reasonably requests. Such cooperation shall include, without limitation, the granting by you to the Company and such person as the Company may request, of access to those persons on your staff who are responsible for receiving tenders, in order to ensure that immediately prior to the Expiration Date the Company shall have received information in sufficient detail to enable it to decide whether to extend the Exchange Offer. You shall prepare a final list of all persons whose tenders were accepted, the aggregate principal amount of Private Notes tendered, the aggregate principal amount of Private Notes accepted and deliver said list to the Company promptly after the Expiration Date.

17. Letters of Transmittal and Notices of Guaranteed Delivery shall be stamped by you as to the date and the time of receipt thereof and shall be preserved by you for a period of time at least equal to the period of time you preserve other records pertaining to the transfer of securities.

18. You hereby expressly waive any lien, encumbrance or right of set-off whatsoever that you may have with respect to funds deposited with you for the payment of transfer taxes by reasons of amounts, if any, borrowed by the Company, or any of its subsidiaries or affiliates pursuant to any loan or credit agreement with you or for compensation owed to you hereunder.

19. For services rendered as Exchange Agent hereunder, you shall be entitled to compensation as set forth on Schedules I, II and III attached hereto plus reasonable out-of-pocket expenses and reasonable attorneys' fees, incurred in connection with your services hereunder, within thirty days following receipt by the Company of an itemized statement of such expenses and fees in reasonable detail.

20. (a) The Company covenants and agrees to indemnify and hold you (which for purposes of this paragraph shall include your directors, officers and employees) harmless in your capacity as Exchange Agent hereunder from and against any and all loss, liability, cost, damage, expense and claim, including but not limited to reasonable attorneys' fees and expenses, incurred by you as a result of, arising out of or in connection with the performance by you of your duties under this Agreement or the compliance by you with the instructions set forth herein or delivered hereunder; provided, however, that the Company shall not be liable for indemnification or otherwise for any loss, liability, cost, damage, expense or claim arising out of your gross negligence or willful misconduct. In no case shall the Company be liable under this indemnity with respect to any claim against you unless the Company shall be notified by you, by letter or by facsimile confirmed by letter, of the written assertion of a claim against you or of any other action commenced against you, promptly after you shall have received any such written assertion or notice of commencement of action. The Company shall be entitled to participate at its own expense in

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the defense of any such claim or other action, and, if the Company so elects, the Company may assume the defense of any suit brought to enforce any such claim; provided that the Company shall not be entitled to assume the defense of any such action if the named parties to such action include both the Company and you and representation of both parties by the same legal counsel would, in the written opinion of counsel to you, be inappropriate due to actual or potential conflicting interests between them. In the event that the Company shall assume the defense of any such suit or threatened action in respect of which indemnification may be sought hereunder, the Company shall not be liable for the fees and expenses of any counsel thereafter retained by you. The Company shall not be liable under this paragraph for the fees and expenses of more than one legal counsel for you.

(b) You agree that, without the prior written consent of the Company (which consent shall not be unreasonably withheld), you will not settle, compromise or consent to the entry of any pending or threatened claim, action, or proceeding in respect of which indemnification could be sought in accordance with the indemnification provisions of this Agreement (whether or not you or the Company or any of its controlling persons is an actual or potential party to such claim, action or proceeding), unless such settlement, compromise or consent includes an unconditional release of the Company and controlling persons from all liability arising out of such claim, action or proceeding.

21. You shall arrange to comply with all requirements under the tax laws of the United States, including those relating to missing Tax Identification Numbers, and shall file any appropriate reports with the Internal Revenue Service. The Company understands that you are required in certain instances to deduct 31% of the amounts to be paid with respect to interest paid on the Exchange Notes and proceeds from the sale, exchange, redemption or retirement of the Exchange Notes from holders who have not supplied their correct Taxpayer Identification Number or required certification. Such funds will be turned over to the Internal Revenue Service in accordance with applicable regulations.

22. You shall notify the Company of the amount of any transfer taxes payable in respect of the exchange of Private Notes and, upon receipt of written approval from the Company, you shall deliver or cause to be delivered, in a timely manner to each governmental authority to which any transfer taxes are payable in respect of the exchange of Private Notes, your check in the amount of all transfer taxes so payable, and the Company shall reimburse you for the amount of any and all transfer taxes payable in respect of the exchange of Private Notes; provided, however, that you shall reimburse the Company for amounts refunded to you in respect of your payment of any such transfer taxes, at such time as such refund is received by you.

23. This Agreement and your appointment as Exchange Agent hereunder shall be construed and enforced in accordance with the laws of the State of New York applicable to agreements made and to be performed entirely within such state, and without regard to conflicts of law principles, and shall inure to the benefit of, and the obligations created hereby shall be binding upon, the successors and assigns of each of the parties hereto, and no other person shall have any rights hereunder.

24. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original and all of which taken together shall constitute one and the same agreement.

25. In case any provision of this Agreement shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

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26. This Agreement shall not be deemed or construed to be modified, amended, rescinded, canceled or waived, in whole or in part, except by a written instrument signed by a duly authorized representative of the party to be charged. This Agreement may not be modified orally.

27. Unless otherwise provided herein, all notices, requests and other communications to any party hereunder shall be in writing (including facsimile or similar writing) and shall be given to such party, addressed to it, at its address or facsimile number set forth below:

If to the Company:

McKesson Corporation
McKesson Plaza
One Post Street
San Francisco, CA 94104

Facsimile: (415) 983-8826
Attention: Nancy A. Miller

If to the Exchange Agent:

The First National Bank of Chicago
c/o First Chicago Trust Company of New York 14 Wall Street
8th Floor, Window 2
New York, New York 10005

Facsimile: (212) 240-8938
Attention: Corporate Trust Administration

With a copy to:

The First National Bank of Chicago
One First National Plaza
Suite 0125
Chicago, Illinois 60670-0126

Facsimile: (312) 407-1708
Attention: Janice Ott Rotunno

28. Unless terminated earlier by the parties hereto, this Agreement shall terminate 180 days following the Expiration Date. Notwithstanding the foregoing, Paragraphs 19, 20 and 22 shall survive the termination of this Agreement. Upon any termination of this Agreement, you shall promptly deliver to the Company any certificates for Notes, funds or property then held by you as Exchange Agent under this Agreement.

29. This Agreement shall be binding and effective as of the date hereof.

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Please acknowledge receipt of this Agreement and confirm the arrangements herein provided by signing and returning the enclosed copy.

McKESSON CORPORATION

By: ______________________________________ Name: Nancy A. Miller
Title: Vice President and Corporate Secretary

Accepted as the date
first above written:

THE FIRST NATIONAL BANK OF CHICAGO, as Exchange Agent

By: ___________________________________ Name:Richard D. Manella
Title:Vice President

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SCHEDULE I

THE FIRST NATIONAL BANK OF CHICAGO
FEE SCHEDULE
EXCHANGE AGENT SERVICES
McKESSON CORPORATION - 6.60% EXCHANGE NOTES DUE MARCH 1, 2000

I. Exchange Agency

A fee for the receipt of exchanged 6.60% Exchange Notes of McKesson Corporation will be charged at $6.50 per letter of transmittal. The total charge will be subject to a minimum of $2,000 and maximum of $5,000.

This fee covers examination and execution of all required documentation, receipt of transmittal letters, reporting as required to the Company and communication with DTC.

II. Miscellaneous

Fees for services not specifically covered in this schedule will be assessed in amounts commensurate with the services rendered.


SCHEDULE II

THE FIRST NATIONAL BANK OF CHICAGO
FEE SCHEDULE
EXCHANGE AGENT SERVICES
McKESSON CORPORATION - 6-7/8% EXCHANGE NOTES DUE MARCH 1, 2000

I. Exchange Agency

A fee for the receipt of exchanged 6-7/8% Exchange Notes of McKesson Corporation will be charged at $6.50 per letter of transmittal. The total charge will be subject to a minimum of $2,000 and maximum of $5,000.

This fee covers examination and execution of all required documentation, receipt of transmittal letters, reporting as required to the Company and communication with DTC.

II. Miscellaneous

Fees for services not specifically covered in this schedule will be assessed in amounts commensurate with the services rendered.


SCHEDULE III

THE FIRST NATIONAL BANK OF CHICAGO
FEE SCHEDULE
EXCHANGE AGENT SERVICES
McKESSON CORPORATION - 7.56% EXCHANGE DEBENTURES
DUE MARCH 1, 2000

I. Exchange Agency

A fee for the receipt of exchanged 7.56% Exchange Debentures of McKesson Corporation will be charged at $6.50 per letter of transmittal. The total charge will be subject to a minimum of $2,000 and maximum of $5,000.

This fee covers examination and execution of all required documentation, receipt of transmittal letters, reporting as required to the Company and communication with DTC.

II. Miscellaneous

Fees for services not specifically covered in this schedule will be assessed in amounts commensurate with the services rendered.