Merck to Hold Second-Quarter 2011 Sales and Earnings Conference Call on July 29

Merck (NYSE: MRK) will hold its second-quarter 2011 sales and earnings conference call with institutional investors and analysts at 8 a.m. EDT on Friday, July 29. During the call, Kenneth C. Frazier, president and 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.

Investors, journalists and the general public may access a live audio webcast of the call on Merck’s website at http://www.merck.com/investors/events-and-presentations/home.html. Software needed to listen to the webcast is available on the corporate website and should be downloaded prior to the beginning of the webcast. A replay of the webcast will be available at approximately 11 a.m. EDT on July 29 and will remain on the website for 12 months. The quarter's sales and earnings news release and supplemental financial disclosures also will be available in the Newsroom and Investor sections of the company's website at www.merck.com.

Members of the media are invited to monitor the call by dialing (706) 758-9928 or (800) 399-7917 and use ID code number 76798557. Journalists who wish to ask questions are requested to contact a member of Merck's Media Relations team at the conclusion of the call.

About Merck

Today's Merck is a global healthcare leader working to help the world be well. Merck is known as MSD outside the United States and Canada. Through our prescription medicines, vaccines, biologic therapies, and consumer care and animal health products, we work with customers and operate in more than 140 countries to deliver innovative health solutions. We also demonstrate our commitment to increasing access to healthcare through far-reaching policies, programs and partnerships. For more information, visit www.merck.com.