Pipex Pharmaceuticals Completes Corporate Name Change And New Ticker Symbol

ANN ARBOR, MI -- (MARKET WIRE) -- December 18, 2006 -- Pipex Pharmaceuticals, Inc. (the “Company” or “Pipex”) (OTCBB: PPXP), a specialty pharmaceutical company developing innovative late-stage oral drug candidates for the treatment of neurologic and fibrotic diseases, announced today that they have completed a corporate name change from Sheffield Pharmaceuticals, Inc. (OTCBB: SFPH) to Pipex Pharmaceuticals, Inc. As a result of the name change, the Over-The-Counter Market on the NASD Electronic Bulletin Board (OTCBB) will begin to trade Pipex’s shares of common stock as of today under the new ticker symbol “PPXP.”

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