Alza, Impax Clash Over Patents For ADD/ADHD Drug Concerta

Law360, New York (September 6, 2005, 12:00 AM EDT) -- California-based Alza Corporation, a maker of drugs for attention disorders, has filed a complaint against two domestic rivals over their attempts to gain approval for generic versions of its drug Concerta.

Alza alleges Impax Laboratories Inc. and Andrx Pharmaceuticals LLC infringe its patents by seeking to make generic versions of all doses of Concerta prior to the expiration of the patents in question.

Concerta, is made with active ingredient methylphenidate hydrochloride, a stimulant medication. It treats Attention Deficit Disorder (ADD) and attention deficit hyperactivity disorder (ADHD)....
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