J&J Files New Concerta Lawsuit Against Impax Labs
Impax said the lawsuit alleges its generic violates patents belonging to Alza supporting Concerta tablets of 18 milligrams, 27 milligrams and 36 milligrams.
Hayward-based Impax Laboratories Inc. said May 6 it received a second patent lawsuit from Johnson & Johnson's Alza Corp. division related to Impax's proposed generic version of drug Concerta, which treats the attention deficit hyperactivity disorder.
Impax said the lawsuit alleges its generic violates patents belonging to Alza supporting Concerta tablets of 18 milligrams, 27 milligrams and 36 milligrams.
In November, another J&J unit -- Ortho-McNeil-Janssen Pharmaceutical -- sued Impax over a generic version of 54-milligram Concerta tablets.
Impax said U.S. sales of Concerta totaled $1.4 billion in the 12 months ended Feb. 28.
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