Arena Pharmaceuticals Inc was incorporated in the state of Delaware in April 14, 1997, and commenced operations in July 1997. The Company is a clinical-stage biopharmaceutical company engaged in discovering, developing and commercializing oral drugs that target G protein-coupled receptors, or GPCRs, to address unmet medical needs. BELVIQ, its internally discovered drug for chronic weight management in adults who are overweight with a comorbidity or obese, is its first and only drug approved for marketing by any regulatory agency. In June 2012, the U.S. Food and Drug Administration, or FDA, approved its internally discovered drug, BELVIQ, for chronic weight management in adults who are overweight with comorbidity or obese. The Company is engaged in commercializing BELVIQ in the United States and ultimately in additional territories, selectively advancing its drug candidates and discovering additional drug candidates. Its programs include: BELVIQ, for chronic weight management; APD811, an orally available agonist of the prostacyclin (IP) receptor, is an internally discovered investigational drug candidate intended for the treatment of Pulmonary Arterial Hypertension; Temanogrel, an orally available inverse agonist of the serotonin 2A receptor, is an internally discovered investigational drug candidate intended for the treatment of thrombotic diseases; APD334, an orally available agonist of the S1P1 receptor, is an internally discovered investigational drug candidate intended for the potential treatment of a number of conditions related to autoimmune diseases, including multiple sclerosis, psoriasis and rheumatoid arthritis; APD371, an orally available agonist of the cannabinoid 2 receptor, is an internally discovered investigational drug candidate intended for the treatment of pain; GPR119, represents pharmaceutical target for discovering orally available small molecule agonists for the treatment of type 2 diabetes. The Company's wholly owned subsidiary, Arena Pharmaceuticals GmbH, or Arena GmbH, granted Eisai Inc., and Eisai Inc.'s parent company, Eisai Co. Ltd. exclusive rights to commercialize BELVIQ in the United States. The Company competes successfully against these organizations, which include many large, well-financed and experienced pharmaceutical and biotechnology companies, as well as academic and research institutions and government agencies. The Company's research and development programs involve the controlled use of hazardous materials, chemicals, biological materials and various radioactive compounds. In the United States, the Company is subject to regulation under the Occupational Safety and Health Act, the Environmental Protection Act, US Environmental Protection Agency, California Environmental Protection Agency, the Toxic Substances Control Act, the Resource Conservation and Recovery Act, the CSA and other federal, state or local regulations.