Document:

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                                                                   EXHIBIT 10.23

                               MCKESSON HBOC, INC.
                                 FIRST AMENDMENT
                               TO CREDIT AGREEMENT

                               (364 DAY FACILITY)

               This FIRST AMENDMENT TO CREDIT AGREEMENT (this "AMENDMENT") is
dated as of October 10, 2000 and entered into by and among McKesson HBOC, Inc.,
a Delaware corporation (the "COMPANY"), the financial institutions listed on the
signature pages hereof (the "BANKS"), The Chase Manhattan Bank, as a
documentation agent for the Banks, First Union National Bank, as a documentation
agent for the Banks, Bank One, N.A., as a documentation agent for the Banks,
Morgan Guaranty Trust Company, as a documentation agent for the Banks and Bank
of America, N.A. as administrative agent for the Banks (the "ADMINISTRATIVE
AGENT"), and is made with reference to that certain Credit Agreement dated as of
October 22, 1999 (the "CREDIT AGREEMENT"), by and among the parties thereto.
Capitalized terms used herein without definition shall have the same meanings
herein as set forth in the Credit Agreement.

                                    RECITALS

               WHEREAS, the Company and the Banks desire to amend the Credit
Agreement (a) to extend the Revolving Facility Termination Date for an
additional 364 day period, (b) to provide for a term loan option, and (c) to
modify certain other provisions;

               NOW, THEREFORE, in consideration of the premises and the
agreements, provisions and covenants herein contained, the parties hereto agree
as follows:

SECTION 1.     AMENDMENTS TO THE CREDIT AGREEMENT

1.1     AMENDMENTS TO ARTICLE I:  DEFINITIONS

               A. Section 1.1 of the Credit Agreement is hereby amended by
adding thereto the following definitions, which shall be inserted in proper
alphabetical order:

                  "Term Loans" has the meaning specified in Section 2.16.

                  "Term Loan Maturity Date" means October 8, 2002.

               B. Section 1.1 of the Credit Agreement is hereby further amended
by deleting in the definition of the term "Applicable Margin", the paragraph
below the table which begins "The margin set forth...." and substituting in
place of such paragraph the following:

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                      "The margin set forth above for any Applicable Rating
        Level on a given date shall be increased by fifteen (15.0) basis points
        if, on such date, either (a) the sum of (x) the Total Utilization of
        Facility A Commitments (as such term is defined in the November 1998
        Credit Agreement) existing on such date and (y) the principal amount of
        Loans (as defined herein) made pursuant to Section 2.1 outstanding on
        such date, exceeds 30% of the sum of (A) the aggregate of the Facility A
        Commitments (as such term is defined in the November 1998 Credit
        Agreement) existing on such date and (B) the aggregate of the
        Commitments (as defined herein) existing on such date, or (b) any Term
        Loans are outstanding."

               C. Section 1.1 of the Credit Agreement is hereby further amended
by adding, in the definition of "Commitment," the following phrase immediately
before the period at the end thereof: "provided that if the Term Loans are made,
"Commitments" means the aggregate principal amount of Term Loans outstanding on
such date".

               D. Section 1.1 of the Credit Agreement is hereby further amended
by deleting, in the definition of "Interest Period," clause (3) in its entirety
and substituting in lieu thereof the following:

                      "(3) no Interest Period for any Loan shall extend beyond
        (i) in the case of Loans made pursuant to Section 2.1, until a Notice of
        Borrowing has been received by the Agent in accordance with subsection
        2.16(b), the Revolving Facility Termination Date; provided that once
        such Notice of Borrowing has been received by the Agent in accordance
        with subsection 2.16(b), the limitation in subpart (ii) of this
        paragraph shall apply to Loans made pursuant to Section 2.1 and (ii) the
        Term Loan Maturity Date, in the case of the Term Loans."

               E. Section 1.1 of the Credit Agreement is hereby further amended
by deleting, in the definition of "Revolving Facility Termination Date," the
date "October 19, 2000" and substituting in lieu thereof the date "October 9,
2001".

1.2     AMENDMENT TO ARTICLE II:  THE CREDITS

               A. Section 2.1 of the Credit Agreement is hereby amended by
deleting the reference to "$850,000,000" and substituting in lieu thereof the
amount "$825,000,000."

               B. Section 2.7(a) of the Credit Agreement is hereby amended by
adding the phrase "Except as provided in Section 2.16," to the beginning of the
sentence.

               C. Section 2.9(a) of the Credit Agreement is hereby amended by
deleting the date "September 17, 1999" and substituting in lieu thereof the date
"September 8, 2000".

               D. Section 2.9(b) of the Credit Agreement is hereby amended by
deleting in the first sentence of the second paragraph thereof the portion of
such sentence preceding the semicolon and substituting in lieu thereof the
following:

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                      "Such facility fee shall accrue from the Closing Date to
        the Revolving Facility Termination Date or, if the Term Loans are made,
        the Term Loan Maturity Date, and shall be due and payable quarterly in
        arrears on each date specified above following the end of each calendar
        quarter through such termination date or maturity date, as applicable,
        with the final payment to be made on such termination date or maturity
        date, as applicable"

               E. Article II of the Credit Agreement is hereby further amended
by adding a new Section 2.16 at the end thereof to read as follows:

               "2.16  Conversion of Loans to Term Loans.

               (a) Each Bank severally agrees on the terms and conditions set
forth in this Agreement to advance to the Company (upon request of the Company
pursuant to this Agreement) on the Revolving Facility Termination Date an amount
up to the sum of (i) the outstanding principal amount of the Loans made by such
Bank pursuant to Section 2.1 and outstanding as of the opening of business on
the Revolving Facility Termination Date plus (ii) the amount available to be
borrowed from such Bank as of the opening of business on the Revolving Facility
Termination Date. The aggregate of such advances is collectively called the
"Term Loans" and shall be made by each Bank in accordance with its Pro Rata
Share. The Term Loans will mature and are due and payable on the Term Loan
Maturity Date. Amounts borrowed under this Section 2.16 and subsequently repaid
or prepaid may not be reborrowed.

               (b) The Term Loans shall be made upon the irrevocable written
notice (including notice via facsimile confirmed immediately by a telephone
call) of the Company in the form of a Notice of Borrowing (which notice must be
received by the Agent not later than 12:00 noon (San Francisco time) not less
than three Business Days prior to the Revolving Facility Termination Date),
specifying: (A) the amount of the Term Loans which shall be in a principal
amount not more than the sum of (i) the aggregate principal amount of the Loans
which will be outstanding as of the opening of business on the Revolving
Facility Termination Date, plus (ii) the amount available to be borrowed from
the Banks as of the opening of business on the Revolving Facility Termination
Date; (B) whether the Term Loans shall be comprised of Base Rate Loans or
Offshore Rate Loans; and (C) the Interest Period applicable to any Offshore Rate
Loans included in such notice.

               (c) The proceeds of the Term Loans will first be used to pay the
principal amount of the Loans made pursuant to Section 2.1 which are outstanding
at the time the Term Loans are made and then in accordance with Sections 6.9 and
7.3."

1.3     AMENDMENT TO ARTICLE V:  REPRESENTATION AND WARRANTIES

               A. Article V of the Credit Agreement is hereby amended by
deleting Section 5.12, entitled "Year 2000 Compliance", in its entirety.

1.4     SUBSTITUTION OF SCHEDULE

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               A. Schedule 2.1 to the Credit Agreement is hereby amended by
deleting said Schedule 2.1 in its entirety and substituting in place thereof a
new Schedule 2.1 in the form of Annex I to this Amendment.

SECTION 2.     CONDITIONS TO EFFECTIVENESS

               This Amendment shall become effective upon receipt by the
Administrative Agent of all of the following, in form and substance satisfactory
to the Administrative Agent and each Bank (the date of satisfaction of such
condition being referred to herein as the "FIRST AMENDMENT EFFECTIVE DATE"):

               A. Amendment. This Amendment executed by each party hereto;

               B. Resolutions; Incumbency.

                      (i) Copies of the resolutions of the board of directors of
        the Company authorizing the transactions contemplated hereby, certified
        as of the First Amendment Effective Date by the Secretary or an
        Assistant Secretary of the Company; and

                      (ii) A certificate of the Secretary or Assistant Secretary
       of the Company, certifying the names and true signatures of the officers
       of the Company authorized to execute, deliver and perform, as applicable,
       this Amendment, and all other Loan Documents to be delivered by it
       hereunder;

               C. Legal Opinion. An opinion of Ivan D. Meyerson, Senior Vice
President, General Counsel and Secretary of the Company, addressed to the
Administrative Agent and the Banks, substantially in the form of Exhibit A;

               D. Payment of Fees. Evidence of payment by the Company of all
accrued and unpaid fees, costs and expenses to the extent then due and payable
on the First Amendment Effective Date, together with Attorney Costs of Bank of
America to the extent invoiced prior to or on the First Amendment Effective
Date, including any such costs, fees and expenses arising under or referenced in
Sections 2.9 and 10.4 of the Credit Agreement; provided that, notwithstanding
the above, such payment by the Company shall include all accrued and unpaid
facility fees through the First Amendment Effective Date;

               E. Company Certificate. A certificate signed by a Responsible
Officer of the Company, dated as of the First Amendment Effective Date, stating
that:

               (i) the representations and warranties contained in Section 3
        hereof and in Article V of the Credit Agreement are true and correct on
        and as of such date, as though made on and as of such date;

                      (ii)    no Default or Event of Default exists;

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                      (iii) there has occurred since March 31, 2000, no event or
      circumstance that has resulted or could reasonably be expected to result
      in a Material Adverse Effect.

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SECTION 3.     COMPANY'S REPRESENTATIONS AND WARRANTIES

               In order to induce the Banks to enter into this Amendment and to
amend the Credit Agreement in the manner provided herein, the Company represents
and warrants to each Bank that the following statements are true, correct and
complete:

               A. DUE INCORPORATION, VALID EXISTENCE AND GOOD STANDING;
CORPORATE POWER AND AUTHORITY. The Company is a corporation duly incorporated,
validly existing and in good standing under the laws of the State of Delaware.
The Company has all requisite corporate power and authority to enter into this
Amendment and to carry out the transactions contemplated by, and perform its
obligations under, the Credit Agreement as amended by this Amendment (the
"AMENDED AGREEMENT").

               B. AUTHORIZATION OF AGREEMENTS. The execution and delivery of
this Amendment and the performance of the Amended Agreement have been duly
authorized by all necessary corporate action on the part of the Company.

               C. NO CONFLICT. The execution and delivery by the Company of this
Amendment and the performance by the Company of the Amended Agreement do not and
will not (i) violate any provision of any law or any governmental rule or
regulation applicable to the Company or any of its Subsidiaries, the Certificate
or Articles of Incorporation or Bylaws of the Company or any of its Subsidiaries
or any order, judgment or decree of any court or other agency of government
binding on the Company or any of its Subsidiaries (ii) conflict with, result in
a breach of or constitute (with due notice or lapse of time or both) a default
under any Contractual Obligation of the Company or any of its Subsidiaries,
(iii) result in or require the creation or imposition of any Lien upon any of
the properties or assets of the Company or any of its Subsidiaries (other than
Liens created under any of the Loan Documents in favor of Administrative Agent
on behalf of Banks), or (iv) require any approval of stockholders or any
approval or consent of any Person under any Contractual Obligation of the
Company or any of its Subsidiaries.

               D. GOVERNMENTAL CONSENTS. The execution and delivery by the
Company of this Amendment and the performance by the Company of the Amended
Agreement do not and will not require any registration with; consent or approval
of, or notice to, or other action to, with or by, any federal, state or other
governmental authority or regulatory body.

               E. BINDING OBLIGATION. This Amendment has been duly executed and
delivered by the Company and this Amendment and the Amended Agreement are the
legally valid and binding obligations of the Company, enforceable against the
Company in accordance with their respective terms, except as may be limited by
bankruptcy, insolvency, reorganization, moratorium or similar laws relating to
or limiting creditors' rights generally or by equitable principles relating to
enforceability.

               F. ABSENCE OF DEFAULT. No event has occurred and is continuing or
will result from the consummation of the transactions contemplated by this
Amendment that would constitute an Event of Default or a Default.

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SECTION 4.     MISCELLANEOUS

               A. REFERENCE TO AND EFFECT ON THE CREDIT AGREEMENT AND THE OTHER
LOAN DOCUMENTS.

                      (i) On and after the First Amendment Effective Date, each
        reference in the Credit Agreement to "this Agreement", "hereunder",
        "hereof", "herein or words of like import referring to the Credit
        Agreement, and each reference in the other Loan Documents to the "Credit
        Agreement", "thereunder", "thereof" or words of like import referring to
        the Credit Agreement shall mean and be a reference to the Amended
        Agreement.

                      (ii) Except as specifically amended by this Amendment, the
        Credit Agreement and the other Loan Documents shall remain in full force
        and effect and are hereby ratified and confirmed.

                      (iii) The execution, delivery and performance of this
        Amendment shall not, except as expressly provided herein, constitute a
        waiver of any provision of, or operate as a waiver of any right, power
        or remedy of the Administrative Agent or any Bank under, the Credit
        Agreement or any of the other Loan Documents.

               B. FEES AND EXPENSES. The Company acknowledges that all costs,
        fees and expenses as described in Section 10.4 of the Credit Agreement
        incurred by the Administrative Agent and its counsel with respect to
        this Amendment and the documents and transactions contemplated hereby
        shall be for the account of the Company.

               C. HEADINGS. Section and subsection headings in this Amendment
        are included herein for convenience of reference only and shall not
        constitute a part of this Amendment for any other purpose or be given
        any substantive effect.

               D. APPLICABLE LAW. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS
        OF THE PARTIES HEREUNDER SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED
        AND ENFORCED IN ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF
        CALIFORNIA (INCLUDING WITHOUT LIMITATION SECTION 1646.5 OF THE CIVIL
        CODE OF THE STATE OF CALIFORNIA), WITHOUT REGARD TO CONFLICTS OF LAWS
        PRINCIPLES.

               E. COUNTERPARTS. This Amendment may be executed in any number of
        counterparts and by different parties hereto in separate counterparts,
        each of which when so executed and delivered shall be deemed an
        original, but all such counterparts together shall constitute but one
        and the same instrument; signature pages may be detached from multiple
        separate counterparts and attached to a single counterpart so that all
        signature pages are physically attached to the same document.

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               IN WITNESS WHEREOF, the parties hereto have caused this Amendment
to be duly executed and delivered by their respective officers thereunto duly
authorized as of the date first written above.

                          MCKESSON HBOC, INC.

                          By: _________________________________
                          Name:   William R. Graber
                          Title:  Senior Vice President and Chief Financial
                                  Officer

                          By: _________________________________
                          Name:   Nicholas A. Loiacono
                          Title:  Vice President, Finance and Treasurer

                          BANK OF AMERICA, N.A., as Administrative Agent

                          By: _________________________________
                          Name:   Jonathan H. Hudson
                          Title:  Associate

                          BANK OF AMERICA, N.A., as a Bank

                          By: _________________________________
                          Name:   Jonathan H. Hudson
                          Title:  Associate

                          MORGAN GUARANTY TRUST COMPANY, as a
                          documentation agent and as a Bank

                          By: _________________________________
                          Name:   Robert Bottamedi
                          Title:  Vice President

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                          THE CHASE MANHATTAN BANK, as
                          documentation agent and as a Bank

                          By: _________________________________
                          Name:   William P. Rindfuss
                          Title:  Vice President

                          BANK ONE, NA, as documentation agent and as a Bank

                          By: _________________________________
                          Name:   Joseph Perdenza
                          Title: Assistant Vice President

                          FIRST UNION NATIONAL BANK, as documentation
                          agent and as a Bank

                          By: _________________________________
                          Name:   Joyce L. Barry
                          Title:  Senior Vice President & Managing Director

                          MELLON BANK, N.A.

                          By: _________________________________
                          Name:   Lawrence C. Ivey
                          Title:  First Vice President

                          TORONTO DOMINION (TEXAS), INC.

                          By: _________________________________
                          Name:   Alva J. Jones
                          Title:  Vice President

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                          WACHOVIA BANK, N.A.

                          By: _________________________________
                          Name:   Jillian Richardson
                          Title:  Assistant Vice President

                          WELLS FARGO BANK, N.A.

                          By: _________________________________
                          Name:   Catherine M. Wallace
                          Title:  Vice President

                          By: _________________________________
                          Name:   J. Gregory Seibly
                          Title:  Senior Vice President

                          THE BANK OF NEW YORK

                          By: _________________________________
                          Name:   Rebecca K. Levine
                          Title:  Vice President

                          U.S. BANK NATIONAL ASSOCIATION

                          By: _________________________________
                          Name:   Aaron J. Gordon
                          Title:  Vice President

                          THE BANK OF NOVA SCOTIA

                          By: _________________________________
                          Name:   R. P. Reynolds
                          Title:  Director

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                          PNC BANK, NATIONAL ASSOCIATION

                          By: _________________________________
                          Name:   Douglas S. King
                          Title:  Vice President

                          ALLFIRST BANK

                          By: _________________________________
                          Name:   Jennifer G. Erickson
                          Title:  Vice President

                          FIFTH THIRD BANK

                          By: _________________________________
                          Name:   Megan S. Heisel
                          Title:  Corporate Banking Officer

                                      11<PAGE>   1
                                                                  EXHIBIT 10.26

                                 THIRD AMENDMENT
                                AND SECOND WAIVER
                                       TO
                         RECEIVABLES PURCHASE AGREEMENT

               THIS THIRD AMENDMENT AND SECOND WAIVER TO RECEIVABLES PURCHASE
AGREEMENT ("Amendment"), dated as of June 16, 2000, is among CGSF Funding
Corporation, a Delaware corporation ("Seller"), McKesson HBOC, Inc., a Delaware
corporation (the "Servicer"; the Servicer together with the Seller, the "Seller
Parties" and each a "Seller Party"), the funding entities parties hereto (the
"Financial Institutions"), Preferred Receivables Funding Corporation ("PREFCO"),
Falcon Asset Securitization Corporation ("Falcon"), Blue Ridge Asset Funding
Corporation ("Blue Ridge") and Liberty Street Funding Corp. ("Liberty Street"),
(PREFCO, Falcon, Blue Ridge and Liberty Street being referred to collectively as
the "Conduits", and together with the Financial Institutions, the "Purchasers"),
Bank One, NA (formerly known as The First National Bank of Chicago, "Bank One"),
Wachovia Bank, N.A. and The Bank of Nova Scotia (collectively, the "Managing
Agents") and Bank One, as the collateral agent (the "Collateral Agent"). Defined
terms used herein and not otherwise defined herein shall have the meaning given
to them in the "Receivables Purchase Agreement" (as hereinafter defined).

               WHEREAS, the Seller, the Servicer, the Financial Institutions,
the Conduits, the Managing Agents and the Collateral Agent are parties to the
Receivables Purchase Agreement dated as of June 25, 1999, as amended by the
First Amendment thereto dated as of September 29, 1999 and the Second Amended
thereto dated as of December 6, 1999 (the "Receivables Purchase Agreement");

               WHEREAS, the Seller and the Servicer have requested that the
Financial Institutions, the Conduits, the Managing Agents and the Collateral
Agent waive the "Specified Default" (as defined below) under the Receivables
Purchase Agreement; and

               WHEREAS, the parties hereto have agreed to amend the Receivables
Purchase Agreement and waive the Specified Default on the terms and conditions
set forth herein;

               NOW, THEREFORE, in consideration of the premises set forth above,
and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, the parties hereto agree as follows:

               1. Amendment to the Receivables Purchase Agreement. Effective as
of the date first above written and subject to the execution of this Amendment
by the parties hereto and the satisfaction of the conditions precedent set forth
in Section 3 below, the Receivables Purchase Agreement shall be and hereby is
amended as follows:

               a. Section 4.1 of the Receivables Purchase Agreement is hereby
amended to add, at the conclusion of the first sentence thereof, the following:
"provided, however, that each Purchaser Interest of a Conduit which is funded
through Pooled Commercial Paper shall accrue

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Yield at the applicable CP Rate for each day during each Accrual Period that any
Capital in respect of such Purchaser Interest is outstanding."

               b. Section 4.3(a) of the Receivables Purchase Agreement is hereby
amended to delete the first sentence thereof in its entirety and to substitute
therefor the following: "With consultation from each related Managing Agent,
Seller shall from time to time request Tranche Periods for the Purchaser
Interests (other than Purchaser Interests which are funded through Pooled
Commercial Paper, the Tranche Periods for which shall be the same as the Accrual
Period); provided, however, that no more than fifteen (15) Tranche Periods shall
be outstanding at any one time.

               c. Exhibit I of the Receivables Purchase Agreement is hereby
amended to add the following new definition in the appropriate alphabetical
locations:

               "Pooled Commercial Paper" means Commercial Paper notes of a
Conduit subject to any particular pooling arrangement by such Conduit but
excluding Commercial Paper issued by a Conduit for a tenor and in an amount
specifically requested by any Person in connection with any agreement effected
by such Conduit; provided, however, that if and to the extent that the Seller
requests a Conduit to issue Commercial Paper notes with particular tranche
periods and the related Managing Agent agrees to such request, such Commercial
Paper notes shall not constitute Pooled Commercial Paper."

               d. The definition of "Broken Funding Costs" in Exhibit I of the
Receivables Purchase Agreement is hereby amended to insert, after the phrase
"remainder of the Tranche Periods", the following parenthetical: "(or, in the
case of Purchaser Interests funded through Pooled Commercial Paper, the tranche
periods for such Pooled Commercial Paper)".

               e. The definition of "CP Tranche Period" in Exhibit I of the
Receivables Purchase Agreement is hereby amended to provide, at the conclusion
thereof, the following: "provided, however, that the CP Tranche Period for any
Purchaser Interest funded through Pooled Commercial Paper shall be (i) the date
from which such Purchaser Interest ceases to be allocated to a CP Tranche Period
pursuant to Section 1.2 until the last Business Day of the Accrual Period in
which such CP Tranche Period ended and (ii) thereafter each Accrual Period."

               f. The definition of "CP Rate" in Exhibit I of the Receivables
Purchase Agreement is hereby amended by inserting the following at the
conclusion thereof:

        "Notwithstanding the foregoing, with respect to Purchaser Interests
        funded through Pooled Commercial Paper, the CP Rate for any CP Tranche
        Period means:

        (i) in the case of Liberty Street, the per annum rate equivalent to the
        weighted average cost (as determined by its Managing Agent and which
        shall include commissions of placement agents and dealers, incremental
        carrying costs incurred with respect to Pooled Commercial Paper maturing
        on dates other than those on which corresponding funds are received by
        Liberty Street, other borrowings by Liberty Street (other than under any
        commercial paper program support agreement) and any other costs
        associated with the issuance of Pooled Commercial Paper) of or related
        to the issuance of Pooled Commercial Paper that are allocated, in whole
        or in part, by Liberty Street or its

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        Managing Agent to fund or maintain its Purchaser Interests (and which
        may be also allocated in part to the funding of other assets of Liberty
        Street) during such CP Tranche Period; provided, however, that if any
        component of such rate is a discount rate, in calculating the "CP Rate"
        for Liberty Street for such Purchaser Interest for such CP Tranche
        Period, Liberty Street shall for such component use the rate resulting
        from converting such discount rate to an interest-bearing equivalent
        rate per annum; and

               (ii) in the case of PREFCO and Falcon, for each day during the
        related CP Tranche Period, the sum of (a) discount accrued on Pooled
        Commercial Paper of such Conduit on such day, plus (b) any and all
        accrued commissions in respect of placement agents and Commercial Paper
        dealers, and issuing and paying agent fees incurred, in respect of such
        Pooled Commercial Paper for such day, plus (iii) other costs associated
        with funding small or odd-lot amounts with respect to all receivable
        purchase facilities which are funded by Pooled Commercial Paper of such
        Conduit for such day, minus (iv) any accrual of income net of expenses
        received on such day from investment of collections received under all
        receivable purchase facilities funded substantially with Pooled
        Commercial Paper, minus (v) any payment received on such day net of
        expenses in respect of Broken Funding Costs related to the prepayment of
        any receivables interest of such Conduit pursuant to the terms of any
        receivable purchase facilities funded substantially with Pooled
        Commercial Paper, as calculated by its Managing Agent on the tenth
        (10th) Business Day immediately preceding each Settlement Date based on
        the aggregate amount of such costs for the applicable CP Tranche Period
        and the number of days during which Capital was outstanding during such
        period and notified to the Seller for each of PREFCO and Falcon, without
        the need to express such CP Rate as a per annum rate. In addition to the
        foregoing costs, if Seller shall request any Incremental Purchase during
        any period of time determined by the Agent in its sole discretion to
        result in incrementally higher costs of Pooled Commercial Paper
        applicable to such Incremental Purchase, the Capital of the Purchaser
        Interest associated with any such Incremental Purchase shall, during
        such period, be deemed to be funded by PREFCO and/or Falcon, as
        applicable, in a special pool (which may include capital associated with
        other receivable purchase facilities) for purposes of determining the CP
        Rate applicable only to such special pool and charged each day during
        such period against such Capital; and

               (iii) with respect to any other Conduit which elects to fund
        Purchaser Interests through Pooled Commercial Paper, such rate as may be
        mutually agreed upon in writing by the Seller, such Conduit and such
        Conduit's Managing Agent and notified in writing to the other parties
        hereto."

               g. The definition of "Designated Obligor" in Exhibit I of the
Receivables Purchase Agreement is hereby deleted in its entirety and the
following new definition is substituted therefor:

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               "Designated Obligor" means Rite Aid or an Obligor indicated by
the Collateral Agent to Seller in writing.(1)

               h. The definition of "Liquidity Termination Date" in Exhibit I of
the Receivables Purchase Agreement is hereby amended to delete the words "June
23, 2000" and to substitute therefor the words "June 15, 2001".

               i. The definition of "Special Concentration Limit" in Exhibit I
of the Receivables Purchase Agreement is hereby amended to add the following
language immediately before the period at the end thereof:

               "; provided, further, that notwithstanding the foregoing, the
Special Concentration Limit for Albertson's (American Stores and Osco Drug) and
for Wal-Mart shall be the lesser of (i) the applicable percentage set forth
above multiplied by the aggregate Outstanding Balance of Eligible Receivables
(net of all Earned Discounts and quarterly volume rebates) at such time and (ii)
$175,000,000."

               j. The definition of "Special Obligor" in Exhibit I of the
Receivables Purchase Agreement is hereby deleted in its entirety and the
following definition is substituted therefor:

               "Special Obligor" means Albertson's (American Stores and Osco
Drug), CVS Corp., Wal-Mart and such other Special Obligors as may be designated
by the managing Agents from time to time.

               k. Exhibit IV of the Receivables Purchase Agreement is hereby
deleted in its entirety and the Exhibit IV attached as Schedule 1 hereto is
substituted therefor.(2)

               2. Waiver. Effective as of the date first above written and
subject to the execution of this Amendment by the parties hereto and the
satisfaction of the conditions precedent set forth in Section 3 below, the
parties hereby agree to waive at all times prior to and including July 17, 2000,
the Seller's failure to obtain a Collection Account Agreement with respect to
the Collection Account at Bank of America, N.A. identified on Schedule 1 to this
Amendment, as required by Sections 5.1(1), 7.1(j), 7.2(b) and 8.2(b) of the
Receivables Purchase Agreement (the "Specified Default").

               3. Conditional Precedent. This Amendment shall become effective
as of the date above written if and only if the Managing Agents have received:

               a. duly executed originals of this Amendment from each of the
parties listed on the signature pages hereto; and

--------
(1) Please note that the effect of this change is to remove Receivables of Rite
Aid from the definition of "Eligible Receivable" by operation of clause (i)(c)
thereof.

(2) Please note that Exhibit IV has been revised to delete the reference to the
lock-box at Am South Bank and to include a reference to the new blocked account
at Bank of America, N.A.

                                       4
<PAGE>   5

               b. a duly executed Amended and Restated Fee Letter providing an
increase to the Administration Fee set forth therein.

               4. Representations and Warranties of the Seller Parties. Each of
the Seller Parties hereby represents and warrants as follows:

               a. This Amendment and the Receivables Purchase Agreement, as
amended hereby, constitute legal, valid and binding obligations of such Seller
Party and are enforceable against such Seller Party in accordance with their
terms.

               b. Upon the effectiveness of this Amendment, each Seller Party
hereby reaffirms all representations and warranties made in the Receivables
Purchase Agreement, and to the extent the same are not amended hereby, agrees
that all such representations and warranties shall be deemed to have been remade
as of the date of delivery of this Amendment, unless and to the extent that any
such representation and warranty is stated to relate solely to an earlier date,
in which case such representation and warranty shall be true and correct as of
such earlier date.

               5.  Reference to and Effect on the Receivables Purchase Agreement

               a. Upon the effectiveness of Section 1 hereof, on and after the
date hereof, each reference in the Receivables Purchase Agreement to "this
Receivables Purchase Agreement," "hereunder," "hereof," "herein" or words of
like import shall mean and be a reference to the Receivables Purchase Agreement
as amended hereby.

               b. The Receivables Purchase Agreement, as amended hereby, and all
other documents, instruments and agreements executed and/or delivered in
connection therewith, shall remain in full force and effect, and are hereby
ratified and confirmed.

               c. Except as expressly provided herein, the execution, delivery
and effectiveness of this Amendment shall not operate as a waiver of any right,
power or remedy of the Managing Agents, the Financial Institutions or the
Collateral Agent, nor constitute a waiver of any provision of the Receivables
Purchase Agreement or any other documents, instruments and agreements executed
and/or delivered in connection therewith.

               6. Governing Law. This Amendment shall be governed by and
construed in accordance with the internal laws (as opposed to the conflict of
law provisions) of the State of New York.

               7. Headings. Section headings in this Amendment are included
herein for convenience of reference only and shall not constitute a part of this
Amendment for any other purpose.

               8. Counterparts. This Amendment may be executed by one or more of
the parties to the Amendment on any number of separate counterparts and all of
said counterparts taken together shall be deemed to constitute one and the same
instrument.

                                       5
<PAGE>   6

               IN WITNESS WHEREOF, this Amendment has been duly executed and
delivered on the date first above written.

                                    CGSF FUNDING CORPORATION, as the Seller

                                    By:_____________________________________
                                    Name:
                                    Title:

                                    McKESSON HBOC, INC., as the Servicer

                                    By:_____________________________________
                                    Name:
                                    Title:

                                    PREFERRED RECEIVABLES FUNDING
                                      CORPORATION, as a Conduit

                                    By:_____________________________________
                                             Authorized Signatory

                                    FALCON ASSET SECURITIZATION
                                      CORPORATION, as a Conduit

                                    By:_____________________________________
                                             Authorized Signatory

                                    BLUE RIDGE ASSET FUNDING CORPORATION, as a
                                    Conduit

                                    By: Wachovia Bank, N.A. as Attorney-In-Fact

                                    By:_____________________________________
                                    Name:
                                    Title:

                            Signature Page to Third Amendment and Second Waiver
                                                                to McKesson RPA

<PAGE>   7

                                    LIBERTY STREET FUNDING CORP., as a Conduit

                                    By:_____________________________________
                                    Name:
                                    Title:

                                    BANK ONE, NA (Main Office Chicago) (formerly
                                    known as The First National Bank of
                                    Chicago), as a Committed Purchaser for
                                    PREFCO and Falcon, a Financial Institution,
                                    a Managing Agent and as Collateral Agent

                                    By:_____________________________________
                                    Name:
                                    Title:

                                    WACHOVIA BANK, N.A., as a Committed
                                    Purchaser for Blue Ridge, a Financial
                                    Institution and a Managing Agent

                                    By:_____________________________________
                                    Name:
                                    Title:

                                    THE BANK OF NOVA SCOTIA, as a Committed
                                    Purchaser for Liberty Street, a Financial
                                    Institution and a Managing Agent

                                    By:_____________________________________
                                    Name:
                                    Title:

                            Signature Page to Third Amendment and Second Waiver
                                                                to McKesson RPA

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