Exhibit 32.2

          CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED
            PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, David W. Froesel, Jr., Senior Vice President and Chief Financial Officer of
Omnicare, Inc. (the "Company"), do hereby certify in accordance with 18 U.S.C.
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
that:

1.   The Quarterly Report on Form 10-Q of the Company for the period ended
     September 30, 2004 (the "Periodic Report") fully complies with the
     requirements of section 13(a) or 15(d) of the Securities Exchange Act of
     1934 (15 U.S.C. 78m or 78o(d)); and

2.   The information contained in the Periodic Report fairly presents, in all
     material respects, the financial condition and results of operations of the
     Company.

Dated: November 9, 2004
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                                             /s/ David W. Froesel, Jr.
                                             -----------------------------------
                                             David W. Froesel, Jr.
                                             Senior Vice President and Chief
                                             Financial Officer