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

Merck & Co., Inc.:

 TO:       Pharmaceutical Reporters and Editors  WHAT:     Merck & Co., Inc. will host a conference call for           pharmaceutical and business reporters and editors to           discuss the Garza v. Merck trial and other U.S. litigation           matters.  WHO:      Kenneth C. Frazier, senior vice president and general           counsel, Merck & Co., Inc.  WHEN:     Friday, April 21, 2006, 4:45 p.m. ET  DIAL-IN:  In the United States, dial (866) 543-6405/ Passcode:           17959477            Outside of the United States, dial (617) 213-8897/           Passcode: 17959477  REPLAY:   A replay of this call will be available from 6:45 p.m. ET,           April 21 until 11:59 p.m. ET, April 28.            In the United States, dial (888) 286-8010/ Passcode:           48406275            Outside of the United States, dial (617) 801-6888/ Passcode:           48406275  WEBCAST:  A live audio Web cast will be available at: http://phx.corporate-ir.net/phoenix.zhtml?p=irol-eventDetails&c=190190 &eventID=1303890  (Due to its length, this URL may need to be copied/pasted into your Internet browser's address field. Remove the extra space if one exists.)