EXHIBIT 32

                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER

         Pursuant to 18 U.S.C. Section 1350, as created by Section 906 of the
Sarbanes-Oxley Act of 2002, the undersigned officer of Amgen Inc. (the
"Company") hereby certifies that:

         (i)      the accompanying Annual Report on Form 10-K of the Company for
                  the fiscal year ended December 31, 2003 (the "Report") fully
                  complies with the requirements of Section 13(a) or Section
                  15(d), as applicable, of the Securities Exchange Act of 1934,
                  as amended; and

         (ii)     information contained in the Report fairly presents, in all
                  material respects, the financial condition and results of
                  operations of the Company.

Dated: 3/11/04                                    /s/ KEVIN W. SHARER
                                          --------------------------------------
                                                    Kevin W. Sharer
                                          Chairman of the Board, Chief Executive
                                                 Officer and President

         A signed original of this written statement required by Section 906 of
the Sarbanes-Oxley Act of 2002 ("Section 906"), or other document
authenticating, acknowledging, or otherwise adopting the signature that appears
in typed form within the electronic version of this written statement required
by Section 906, has been provided to Amgen Inc. and will be retained by Amgen
Inc. and furnished to the Securities and Exchange Commission or its staff upon
request.



                    CERTIFICATION OF CHIEF FINANCIAL OFFICER

         Pursuant to 18 U.S.C. Section 1350, as created by Section 906 of the
Sarbanes-Oxley Act of 2002, the undersigned officer of Amgen Inc. (the
"Company") hereby certifies that:

         (i)      the accompanying Annual Report on Form 10-K of the Company for
                  the fiscal year ended December 31, 2003 (the "Report") fully
                  complies with the requirements of Section 13(a) or Section
                  15(d), as applicable, of the Securities Exchange Act of 1934,
                  as amended; and

         (ii)     information contained in the Report fairly presents, in all
                  material respects, the financial condition and results of
                  operations of the Company.

Dated: 3/11/04                                      /s/ RICHARD D. NANULA
                                              ----------------------------------
                                                      Richard D. Nanula
                                              Executive Vice President, Finance,
                                                 Strategy and Communications,
                                                  and Chief Financial Officer

         A signed original of this written statement required by Section 906 of
the Sarbanes-Oxley Act of 2002 ("Section 906"), or other document
authenticating, acknowledging, or otherwise adopting the signature that appears
in typed form within the electronic version of this written statement required
by Section 906, has been provided to Amgen Inc. and will be retained by Amgen
Inc. and furnished to the Securities and Exchange Commission or its staff upon
request.