SAN DIEGO--(BUSINESS WIRE)--Somaxon Pharmaceuticals, Inc. (Nasdaq:SOMX), a specialty pharmaceutical company focused on the in-licensing and development of proprietary product candidates for the treatment of diseases and disorders in the fields of psychiatry and neurology, today announced that the U.S. Food and Drug Administration (FDA) has notified the company that it has accepted for filing the company’s New Drug Application (NDA) for SILENOR™ (doxepin hydrochloride). Somaxon is seeking marketing approval of SILENOR™ for the treatment of insomnia.