Merck to Hold Fourth-Quarter 2010 Sales and Earnings Conference Call on Feb. 3

Merck will hold its fourth-quarter 2010 sales and earnings conference call with institutional investors and analysts beginning at 8 a.m. EST on Thursday, Feb. 3. During the call, Kenneth C. Frazier, chief executive officer, Peter N. Kellogg, executive vice president and chief financial officer, and Adam H. Schechter, president, Global Human Health, will provide an overview of Merck’s financial performance for the quarter. Journalists are invited to listen-only by calling (706) 758-9928 or (800) 399-7917. At the conclusion of the call, journalists who wish to ask questions are invited to call Media Relations. A replay of the call will be available starting at 11 a.m. EST on Feb. 3 through 11:59 p.m. EST on Feb. 11. To listen to the replay, dial (706) 645-9291 or (800) 642-1687 and enter ID No. 30176534.

Investors, journalists and the general public may access a live audio webcast of the call on Merck’s Web site at http://www.merck.com/investors/events-and-presentations/home.html. Software needed to listen to the webcast is available on the corporate Web site and should be downloaded prior to the beginning of the webcast. A replay of the webcast will be available at approximately 11 a.m. EST on Feb. 3 and will remain on the website for 12 months. The fourth-quarter sales and earnings news release and supplemental financial disclosures also will be available in the Newsroom.