Arena Pharmaceuticals, Inc. is a biopharmaceutical company focused on discovering, developing and commercializing drugs that target G protein-coupled receptors (GPCRs). The Company's drug, BELVIQ (lorcaserin HCl), was approved by the United States Food and Drug Administration for marketing in the United States. In addition to BELVIQ, the Company has other drug candidates and compounds at various stages of research and development. The Company is exploring lorcaserin's once-a-day, extended release formulation, as an aid to smoking cessation, in combination with phentermine and other agents for weight management, and for other possible indications. The Company's other drug candidates include ralinepag for vascular diseases, APD334 for autoimmune diseases, APD371 for pain and fibrotic diseases, and temanogrel for thrombotic diseases.