Exhibit 24.1

                                POWER OF ATTORNEY
                                -----------------

KNOW ALL BY THESE PRESENT that the individuals whose signatures appear below, in
their capacities as officers and directors of Immunex Corporation, hereby
constitute and appoint David A. Mann their true and lawful attorney-in-fact,
with full power of substitution, to sign on behalf of the undersigned Immunex's
Annual Report on Form 10-K for the 2001 fiscal year pursuant to Section 13 of
the Securities and Exchange Act of 1934 and to file the same, with exhibits
thereto and any other documents in connection therewith, with the Securities and
Exchange Commission. Each of the undersigned does hereby ratify and confirm all
that such attorney-in-fact may do or cause to be done by virtue hereof.


                 Signature                       Title                Date
                 ---------                       -----                ----

          /s/ Kirby L. Cramer
          -------------------------            Director           March 7, 2002
          (Kirby L. Cramer)

          /s/ Robert J. Herbold
          -------------------------            Director           March 7, 2002
          (Robert J. Herbold)

          /s/ John E. Lyons
          --------------------------           Director           March 7, 2002
          (John E. Lyons)

          /s/ Joseph M. Mahady
          --------------------------           Director           March 7, 2002
          (Joseph M. Mahady)

          /s/ Edith W. Martin
          --------------------------           Director           March 7, 2002
          (Edith W. Martin)

          /s/ Lawrence V. Stein
          --------------------------           Director           March 7, 2002
          (Lawrence V. Stein)