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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
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                                 SCHEDULE 14D-1
 
              TENDER OFFER STATEMENT PURSUANT TO SECTION 14(D)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
 
                               (AMENDMENT NO. 6)
 
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                              MCKESSON CORPORATION
                           (NAME OF SUBJECT COMPANY)
 
                          ECO ACQUISITION CORPORATION
                          A WHOLLY OWNED SUBSIDIARY OF
                             ELI LILLY AND COMPANY
                                   (BIDDERS)
 
COMMON STOCK, $2.00 PAR VALUE PER SHARE               581556 10 7
   (INCLUDING THE ASSOCIATED RIGHTS)     (CUSIP NUMBER OF CLASS OF SECURITIES)
     (TITLE OF CLASS OF SECURITIES)
 
                                J.B. KING, ESQ.
                       VICE PRESIDENT AND GENERAL COUNSEL
                             ELI LILLY AND COMPANY
                             LILLY CORPORATE CENTER
                          INDIANAPOLIS, INDIANA 46285
                                 (317) 276-2000
         (NAMES, ADDRESSES AND TELEPHONE NUMBERS OF PERSONS AUTHORIZED
           TO RECEIVE NOTICES AND COMMUNICATIONS ON BEHALF OF BIDDER)
 
                                WITH A COPY TO:
 
                             BERNARD E. KURY, ESQ.
                                DEWEY BALLANTINE
                          1301 AVENUE OF THE AMERICAS
                            NEW YORK, NEW YORK 10019
                                 (212) 259-7400
 
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  This Amendment No. 6 to the Schedule 14D-1 relates to a tender offer by ECO
Acquisition Corporation (the "Purchaser"), a Delaware corporation and a wholly
owned subsidiary of Eli Lilly and Company, an Indiana corporation ("Parent"),
to purchase all outstanding shares of common stock, par value $2.00 per share
and the associated Rights (as defined in the Offer to Purchase) (collectively,
the "Shares"), of McKesson Corporation (the "Company"), a Delaware corporation,
at a purchase price of $76.00 per Share, net to the seller in cash, without
interest, upon the terms and subject to the conditions set forth in the Offer
to Purchase, dated July 15, 1994 (the "Offer to Purchase"), and the related
Letter of Transmittal (which together constitute the "Offer"), copies of which
were attached as Exhibits (a)(1) and (a)(2), respectively, to the Schedule 14D-
1 filed with the Securities and Exchange Commission on July 15, 1994 as amended
by Amendment Nos. 1, 2, 3, 4 and 5 thereto dated July 27, 1994, August 10,
1994, September 7, 1994, September 21, 1994 and October 11, 1994, respectively
(collectively, the "Schedule 14D-1"). The purpose of this Amendment No. 6 is to
amend and supplement Items 10 and 11 of the Schedule 14D-1 as described below.
 
ITEM 10. ADDITIONAL INFORMATION TO BE FURNISHED.
 
  Reference is made to the press releases issued by Parent on October 11 and
13, 1994, copies of which are filed as Exhibits (a)(22) and (a)(24) to the
Schedule 14D-1 and are incorporated herein by reference.
 
ITEM 11. MATERIAL TO BE FILED AS EXHIBITS.
 
 
  (a)(24)   --Form of press release issued by Parent on October 13, 1994.
 
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                                   SIGNATURE
 
  AFTER DUE INQUIRY AND TO THE BEST OF ITS KNOWLEDGE AND BELIEF, EACH OF THE
UNDERSIGNED CERTIFIES THAT THE INFORMATION SET FORTH IN THIS STATEMENT IS TRUE,
COMPLETE AND CORRECT.
 
                                          Eli Lilly and Company
 
                                                  /s/ James M. Cornelius
                                          By: _________________________________
                                            Name: James M. Cornelius
                                            Title:  Vice President, Finance
                                           and
                                                Chief Financial Officer
 
                                          ECO Acquisition Corporation
 
                                                 /s/ Charles E. Schalliol
                                          By: _________________________________
                                            Name: Charles E. Schalliol
                                            Title:   President
 
Dated: October 13, 1994
 
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                                                                 EXHIBIT (A)(24)
 
                                          October 13, 1994
                                          For Release Immediately
                                          Refer to (317) 276-3655
 
    LILLY EXTENDS HART-SCOTT-RODINO WAITING PERIOD FOR MCKESSON TENDER OFFER
 
  Eli Lilly and Company announced today that it has agreed to extend the
waiting period under the Hart-Scott-Rodino Antitrust Improvements Act (HSR Act)
in connection with its tender offer for McKesson Corporation until Thursday,
October 27, 1994. The waiting period was originally scheduled to expire today,
October 13, 1994. Because of the complexity of the transaction, additional time
is needed to complete the ongoing discussions taking place between Lilly and
the Federal Trade Commission (FTC).
 
  The FTC has advised Lilly that its submission in response to the FTC's second
request for information under the HSR Act is in compliance with the request.
 
  It is possible that Lilly could agree to a further extension of the waiting
period. For this reason, as well as to permit McKesson time to complete the
previously announced distribution of stock of a newly formed McKesson
corporation to its stockholders, it will be necessary to further extend its
offer to purchase the common stock of McKesson, which is currently scheduled to
expire on Monday, October 24, 1994.