Merck & Co., Inc. To Host Media and Investor Briefing

Merck & Co., Inc. (NYSE:MRK):

TO:      Health News Reporters/Producers; Analysts         

WHAT: Merck & Co., Inc. will host a briefing for reporters and analysts following the close of the U.S. Food and Drug Administration’s (FDA) Arthritis Advisory Committee Meeting on ARCOXIA (etoricoxib) to discuss the outcome of the meeting and to participate in a question and answer session.

WHO: Kyra Lindemann Executive Director, Media Relations Merck & Co., Inc.

Sean Curtis, M.D., MPH Executive Director, Clinical Sciences Merck & Co., Inc.

Scott Korn, M.D. Executive Director, Regulatory Affairs International Merck & Co., Inc.

WHEN: Thursday, April 12, 2007

Start: Within 30 minutes following the conclusion of the U.S. FDA Arthritis Advisory Committee Meeting

Duration: 30 – 45 minutes

WHERE: Hilton Gaithersburg Bethesda Room 620 Perry Parkway Gaithersburg, Md.

DIAL-IN: In the United States: 866-288-0541/passcode: 1737414

Outside of the United States: 44-207-984-7566/passcode: 1737414