Suit Targets Impax’s Move To Sell Generic Amrix

Law360, New York (January 8, 2009, 12:00 AM EST) -- Impax Laboratories Inc. said Thursday it has been tied into a patent infringement suit over its plans to market a generic Amrix, a skeletal muscle relaxant produced by Pennsylvania-based Cephalon Inc.

Cephalon lodged the suit in the U.S. District Court for the District of Delaware after the Hayward, Calif.-based specialty pharmaceutical firm submitted an abbreviated new drug application for cyclobenzaprine hydrochloride extended release capsules to the U.S. Food and Drug Administration, according to Impax.

Impax’s ANDA includes a Paragraph IV certification, which asserts the generic version...
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