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

Merck & Co., Inc. (NYSE: MRK):
TO: Journalists and Pharmaceutical Analysts

WHAT: The defense trial team from the product liability case
Grossberg v. Merck will host a conference call for
journalists and pharmaceutical analysts to discuss the
outcome of the trial.

WHO: Ralph Campillo of Sedgwick, Detert, Moran & Arnold in
Los Angeles
Tarek Ismail of Bartlit, Beck, Herman, Palenchar & Scott in
Chicago
Thomas Yoo of Reed Smith in Los Angeles

WHEN: Wednesday, Aug. 2, 2006, 8 p.m. ET

DIAL-IN: In the United States, dial (800) 510-0219/
Passcode: 77833550

Outside of the United States, dial (617) 614-3451/
Passcode: 77833550

REPLAY: A replay of this call will be available from 10 p.m. ET,
Aug. 2 until 11:59 p.m. ET, Aug. 9.

In the United States, dial (888) 286-8010/
Passcode: 14107356

Outside of the United States, dial (617) 801-6888/
Passcode: 14107356

WEBCAST: A live audio Web cast will be available at:

http://phx.corporate-ir.net/phoenix.zhtml?p=irol-eventDetails&c=
190190&eventID=1362642 (Due to the length of this URL, it may be
necessary to copy and paste this hyperlink into your Internet
browser's URL address field.)