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Par Pharmaceutical Sued by Horizon Over Duexis Generic

Par Pharmaceutical Cos. was sued for patent infringement by Horizon Pharma Inc. over a generic version of the drug Duexis, used to treat arthritis.

Horizon, based in Northbrook, Illinois, contends Par plans to market a copy of the drug before two U.S. patents expire in 2026, according to a complaint filed yesterday in federal court in Wilmington, Delaware.

Unless a judge stops the alleged infringement, “Horizon will be irreparably harmed,” the company said in court papers.

Gross sales for Duexis in the third quarter of 2012 were $3 million, Horizon said in a Nov. 13 statement.

Stephen Mock, a spokesman for Woodcliff Lake, New Jersey-based Par, didn’t immediately return a phone call seeking comment on the lawsuit.

The case is Horizon Pharma v. Par Pharmaceutical, U.S. District Court, District of Delaware (Wilmington).

To see the patents in the lawsuit, click: 8,309,127 and 8,318,202.

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