Arena Pharmaceuticals Inc (NASDAQ: ARNA ) and VIVUS (NASDAQ: VVUS ) in early 2012 as each company headed into their regulatory reviews with the U.S. Food and Drug Administration, or FDA, for their respective obesity medications. Arena Pharmaceuticals, Inc. (NASDAQ:ARNA) stock performance was -2.84% in last session and finished the day at $6.49. Traded volume was 6.83million shares in the last session and the average … Continue reading Active Stocks Healthcare: Arena Pharmaceuticals (NASDAQ:ARNA), Pfizer Inc. (NYSE:PFE), Merck & Co. (NYSE:MRK), Teva Pharmaceutical Industries (NYSE:TEVA)