Merck, Inc. ERISA Litigation

Plaintiffs filed a complaint in the United States District Court for the District of New Jersey on behalf of all participants in the Merck & Co., Inc. Employee Savings & Security Plan (the "Salaried Plan"), the Merck & Co., Inc. Employee Stock Purchase & Savings Plan (the "Hourly Plan"), the Merck Puerto Rico Employee Savings & Security Plan (the "Puerto Rico Plan") and the Merck-Medco Managed Care, LLC 401(k) Savings Plan (the "Medco Plan") (collectively the "Plans") during the period from October 1, 1998 through September 30, 2004.