Cerimon Pharmaceuticals, founded in 2004 and based in South San Francisco, California, is a biopharmaceutical company that focuses on developing and commercializing treatments for autoimmune diseases, inflammation, and pain. Their products include Simulect, a monoclonal antibody for ulcerative colitis, diclofenac sodium, a non-steroidal anti-inflammatory drug for various types of pain, and topical diclofenac sodium patch products. The company operates in the United States and Europe.