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Teva-Pharmaceutical

The makers of Linzess hit Teva Pharmaceuticals USA with another infringement suit Friday, accusing the Pennsylvania-based generic drugmaker of mounting a late challenge to a patent for the popular constipation drug.

The complaint, filed by Forest Laboratories, Allergan USA Inc. and Ironwood Pharmaceuticals Inc. in U.S. District Court for the District of Delaware, accuses Teva of infringing a 10 patent for Linzess, which is used to treat irritable bowel syndrome with constipation and chronic idiopathic constipation. Last year, the companies sued Teva and a contingent of other pharmaceutical firms for trying to bring their generics to the market.

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Tom McParland

Tom McParland of New York Law Journal can be contacted at [email protected] Follow him on Twitter @TMcParlandALM.

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