- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                               ----------------
 
                                 SCHEDULE 14D-1
 
              TENDER OFFER STATEMENT PURSUANT TO SECTION 14(D)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
 
                               (AMENDMENT NO. 8)
 
                               ----------------
 
                              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
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

 
  This Amendment No. 8 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, 5, 6 and 7 thereto dated July 27, 1994, August
10, 1994, September 7, 1994, September 21, 1994, October 11, 1994, October 13,
1994 and October 14, 1994, respectively (collectively, the "Schedule 14D-1").
The purpose of this Amendment No. 8 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 release issued by Parent on October 24, 1994,
a copy of which is filed as Exhibit (a)(26) to the Schedule 14D-1 and is
incorporated herein by reference.
 
ITEM 11. MATERIAL TO BE FILED AS EXHIBITS.
 
 
  (a)(26)   --Form of press release issued by Parent on October 24, 1994.
 
                                       1

 
                                   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 24, 1994
 
                                       2

 
                                                                 EXHIBIT (a)(26)
 
                                          October 24, 1994
                                          For Release Immediately
                                          Refer to (317) 276-3655
 
                      LILLY EXTENDS MCKESSON TENDER OFFER
 
  Eli Lilly and Company (NYSE:LLY) announced today that it is extending its
offer to purchase all outstanding shares of common stock of McKesson
Corporation for $76.00 per share in cash until 5:00 p.m., New York City time,
on Monday, November 7, 1994.
 
  The terms of the extended offer are identical to the terms of the original
offer announced on July 11, 1994. Therefore, in addition to Lilly's offer of
$76.00 per share in cash, McKesson Corporation will, immediately prior to the
consummation of the tender offer, distribute to its stockholders one share of
common stock of a newly formed McKesson corporation for each share held in the
old McKesson Corporation.
 
  Lilly said that its discussions with the Federal Trade Commission were
continuing. The mandatory waiting period under the Hart-Scott-Rodino Antitrust
Improvements Act is now scheduled to expire on Thursday, October 27, 1994. 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
distribution of stock of the newly formed McKesson corporation to its
stockholders, it is possible that Lilly's tender offer will be further
extended.
 
  As of Friday, October 21, 1994, approximately 15,184,000 shares of McKesson
common stock had been tendered.
 
                                  *    *    *