SAN DIEGO, July 19, 2012 (GLOBE NEWSWIRE) -- Somaxon Pharmaceuticals, Inc. (Nasdaq:SOMX), a specialty pharmaceutical company, today announced that it has entered into a settlement agreement with Cadila Healthcare Limited and Zydus Pharmaceuticals (USA), Inc. (collectively, “Zydus”) to resolve pending patent litigation involving Silenor® 3 mg and 6 mg tablets.