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Impax Opens New Front In Adderall Battle With Shire

Law360 (November 11, 2005, 12:00 AM EST) -- Impax Laboratories Inc. is taking action against the newest patent issued for anti-depressant Adderall XR, countersuing Shire Laboratories Inc. in federal court. At the same time, Shire is lobbying the FDA to further restrict the generic manufacture of the drug.

California-based Impax is seeking a declaratory judgment that it does not infringe Maryland-based Shire’s Adderall patent and that the patent’s claims are invalid. The suit was filed in the U.S. District Court for the District of Delaware.

Shire sued Impax, as well as Barr Laboratories Inc.,...
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