DOW JONES NEWSWIRES 
 

Schering-Plough Corp. (SGP) reached an agreement with India's Orchid Chemicals & Pharmaceuticals Ltd. (524372.BY) and Orgenus Pharma Inc. that will allow those companies to sell generic forms of its Clarinex allergy treatment starting in 2012.

Schering-Plough holds patents on Clarinex that extend to 2022.

The deal ends all pending lawsuits filed since 2006 in federal court in New Jersey against several generic drug manufacturing companies that had sought approval to sell generic brands before Schering-Plough's patents expired. Schering-Plough, which is preparing to merge with Merck & Co. (MRK), previously settled suits against about 15 other companies.

Orchid will introduce a generic version of Clarinex Reditabs in the U.S. on Jan. 1, 2012, and Clarinex brand 5-milligram tablets on July 1, 2012.

Schering-Plough's shares closed Tuesday at $26.63, down 0.7%, and were inactive after hours.

-By Kathy Shwiff, Dow Jones Newswires; 212-416-2357; Kathy.Shwiff@dowjones.com