Another Generic Drug Maker Challenges Plavix Patent

Law360, New York (September 22, 2005, 12:00 AM EDT) -- French drug maker Sanofi-Aventis and U.S. partner Bristol-Myers Squibb have sued Cobalt Pharmaceuticals over its plans to make a generic version of blockbuster blood thinner Plavix.

The lawsuit, filed last week in the Southern District of New York, comes in the wake of Cobalt’s filing with the U.S. Food and Drug Administration (FDA) of an abbreviated new drug application (ANDA) for clopidrogel bisulfate, the active ingredient of Plavix. The application was filed with a so-called “Paragraph IV” certification.

Generics drug applicants must include with their ANDAs...
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