Shire Sues Watson Again Over Adderall Patents

Law360, New York (April 6, 2011, 2:03 PM EDT) -- Shire LLC accused Watson Pharmaceuticals Inc. in New York on Tuesday of infringing its patents for attention deficit hyperactivity disorder drug Adderall XR and violating an earlier licensing agreement with the Irish biopharmaceutical company.

The complaint, filed in the U.S. District Court for the Southern District of New York, is in response to a Paragraph IV notice letter that Watson sent earlier this year challenging several patents for the popular drug, parent company Shire PLC said Wednesday.

Shire claims that Watson's recently filed abbreviated new drug...
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