EXHIBIT 24.1

POWER OF ATTORNEY

          Each of the undersigned does hereby appoint CELIA A. COLBERT and BRUCE N. KUHLIK and each of them, severally, his/her true and lawful attorney or attorneys to execute on behalf of the undersigned (whether on behalf of the Company, or as an officer or director thereof, or by attesting the seal of the Company, or otherwise) the Form 10-K Annual Report of Merck & Co., Inc. for the fiscal year ended December 31, 2008 under the Securities Exchange Act of 1934, including amendments thereto and all exhibits and other documents in connection therewith.

           IN WITNESS WHEREOF, this instrument has been duly executed as of the 24^th day of February 2009.

/s/ Richard T. Clark		Chairman, President and Chief Executive Officer
Richard T. Clark		(Principal Executive Officer; Director)
/s/ Peter N. Kellogg		Executive Vice President and Chief Financial Officer
Peter N. Kellogg		(Principal Financial Officer)
/s/ John Canan		Senior Vice President and Controller
John Canan		(Principal Accounting Officer)

		DIRECTORS
/s/ Leslie A. Brun
Leslie A. Brun				Rochelle B. Lazarus
/s/ Johnnetta B. Cole				/s/ Carlos E. Represas
Johnnetta B. Cole				Carlos E. Represas
				/s/ Thomas E. Shenk
Thomas H. Glocer				Thomas E. Shenk
/s/ Steven F. Goldstone
Steven F. Goldstone				Anne M. Tatlock
/s/ William B. Harrison, Jr.				/s/ Samuel O. Thier
William B. Harrison, Jr.				Samuel O. Thier
/s/ Harry R. Jacobson				/s/ Wendell P. Weeks
Harry R. Jacobson				Wendell P. Weeks
/s/ William N. Kelley				/s/ Peter C. Wendell
William N. Kelley				Peter C. Wendell