PROSPECTUS SUPPLEMENT
                    (TO PROSPECTUS DATED JUNE 18, 1997)

               4,000,000 TRUST CONVERTIBLE PREFERRED SECURITIES
                           MCKESSON FINANCING TRUST
                   5% TRUST CONVERTIBLE PREFERRED SECURITIES
          (LIQUIDATION AMOUNT $50 PER CONVERTIBLE PREFERRED SECURITY)
                 GUARANTEED TO THE EXTENT SET FORTH HEREIN BY
                             MCKESSON CORPORATION
                             --------------------

          This Prospectus Supplement supplements and amends the
     Prospectus dated June 18, 1997 (the "Prospectus") relating to the
     5% Trust Convertible Preferred Securities (the "Convertible
     Preferred Securities"), which represent preferred undivided
     beneficial interests in the assets of McKesson Financing Trust, a
     statutory business trust formed under the laws of the State of
     Delaware, and the shares of common stock, par value $.01 per
     share ("McKesson Common Stock"), of McKesson Corporation, a
     Delaware corporation ("McKesson") issuable upon conversion of the
     Convertible Preferred Securities.

          A merger between Cardinal Health Inc. and Bergen Brunswig
     Corporation has been proposed.  If the merger is completed by the
     parties as planned, McKesson will no longer be the largest health
     care supply management company in North America.

          The Prospectus, together with this Prospectus Supplement,
     constitutes the prospectus required to be delivered by Section
     5(b) of the Securities Act of 1933, as amended, with respect to
     offers and sales of the Convertible Preferred Securities and
     McKesson Common Stock issuable upon conversion of the Convertible
     Preferred Securities.  All references in the Prospectus to "this
     Prospectus" are hereby amended to read "this Prospectus (as
     supplemented and amended)".

     PROSPECTIVE INVESTORS SHOULD CAREFULLY CONSIDER MATTERS DISCUSSED
     UNDER THE CAPTION "RISK FACTORS" BEGINNING ON PAGE 6 OF THE
     PROSPECTUS.

     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 Supplement is September 8, 1997.