Merck & Co., Inc. (NYSE: MRK):

TO:       Journalists and Pharmaceutical Analysts

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

WHO:      Jim Fitzpatrick of Hughes Hubbard & Reed
          Diane Sullivan of Dechert LLP

WHEN:     Thursday, July 13, 2006, 3:30 p.m. ET

DIAL-IN:  In the United States, dial (800) 901-5231/ 
          Passcode: 49790509

          Outside of the United States, dial (617) 786-2961/ 
          Passcode: 49790509

REPLAY:   A replay of this call will be available from 5:30 p.m. ET,
          July 13 until 11:59 p.m. ET, July 20.

          In the United States, dial (888) 286-8010/ 
          Passcode: 62414438

          Outside of the United States, dial (617) 801-6888/ 
          Passcode: 62414438

WEBCAST:  A live audio Web cast will be available at:
http://phx.corporate-ir.net/phoenix.zhtml?p=irol-eventDetails&c=190190
&eventID=1352522     

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