Merck Announces Voluntary Delisting from Philadelphia Stock Exchange

WHITEHOUSE STATION, N.J., Nov. 17, 2008 - Merck & Co., Inc. announced today the Company's intention to voluntarily delist its common shares from the NASDAQ OMX – PHLX, Inc., formerly the Philadelphia Stock Exchange (PHLX), following a decision by the exchange to discontinue the PHLX XLE equity trading platform.

Common shares of Merck will continue to be traded on the New York Stock Exchange under the ticker symbol MRK.
 
About Merck
Merck & Co., Inc. is a global research-driven pharmaceutical company dedicated to putting patients first.  Established in 1891, Merck discovers, develops, manufactures and markets vaccines and medicines to address unmet medical needs.  The Company devotes extensive efforts to increase access to medicines through far-reaching programs that not only donate Merck medicines but help deliver them to the people who need them.  Merck also publishes unbiased health information as a not-for-profit service.  For more information, visit www.merck.com.

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