Merck & Co., Inc. Conference Call and Audio Web Cast

TO:	Pharmaceutical Journalists and Analysts
WHAT:	Merck & Co., Inc. will host a conference call for pharmaceutical and business journalists and analysts to discuss the preliminary analyses of the off-drug extension of the APPROVe study of VIOXX.
WHO:	Peter S. Kim, Ph.D., president, Merck Research Laboratories Kenneth C. Frazier, senior vice president and general counsel, Merck
WHEN:	Thursday, May 11, 2006, 4:30 p.m. ET
DIAL-IN:	In the United States, dial (866) 202-1971 Passcode: 11833956 Outside of the United States, dial (617) 213-8842 Passcode: 11833956
REPLAY:	A replay of this call will be available from 5 p.m. ET, May 11 until 11:59 p.m. ET, May 25. In the United States, dial (888) 286-8010 Passcode: 73501895 Outside of the United States, dial (617) 801-6888 Passcode: 73501895
WEBCAST:	A live audio Web cast will be available at: http://phx.corporate-ir.net/phoenix.zhtml?p=irol-eventDetails&c=190190&eventID=1317899

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