EXHIBIT 24

                               POWERS OF ATTORNEY

The undersigned directors of OMNICARE, INC. ("Company") hereby appoint JOEL F.
GEMUNDER, DAVID W. FROESEL, JR. and CHERYL D. HODGES as his/her true and lawful
attorneys-in-fact for the purpose of signing the Company's Annual Report on
Form 10-K for the year ended December 31, 2004, and all amendments thereto, to
be filed with the Securities and Exchange Commission. Each of such
attorneys-in-fact is appointed with full power to act without the other.


/s/ Edward L. Hutton                                           March 4, 2005
- ---------------------------------                           --------------------
    Edward L. Hutton                                                Date


/s/ Charles H. Erhart, Jr.                                     March 5, 2005
- ---------------------------------                           --------------------
    Charles H. Erhart, Jr.                                          Date


/s/ Sandra E. Laney                                            March 4, 2005
- ---------------------------------                           --------------------
    Sandra E. Laney                                                 Date


/s/ Andrea R. Lindell, DNSc, RN                                March 4, 2005
- ---------------------------------                           --------------------
    Andrea R. Lindell, DNSc, RN                                     Date


/s/ John H. Timoney                                            March 6, 2005
- ---------------------------------                           --------------------
    John H. Timoney                                                 Date


/s/ Amy Wallman                                                March 4, 2005
- ---------------------------------                           --------------------
    Amy Wallman                                                     Date


/s/ John T. Crotty                                             March 4, 2005
- ---------------------------------                           --------------------
    John T. Crotty                                                  Date