Arena Pharmaceuticals (ARNA), which soared over 10% in Monday morning trading, has set a new 52-week high of $6.75. Over the past month, Arena signed a licensing deal for its potential weight-loss drug, lorcaserin, with Japan's Eisai; released study results for the drug; and got a boost from a decision by a Food and Drug Administration panel on rival's Vivus (VVUS) drug. Arena's shares have more than doubled during that time.The Eisai licensing deal is potentially worth about $1.3 billion. Meanwhile, the study results Arena released showed lorcaserin helped nearly half the patients lose 5% of their weight and improved their chances of keeping it off. Arena's drug did that while exhibiting a safer safety profile than either of its competitors' treatments: Vivus's Qnexa and Orexigen's (OREX) Contrave.
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Pharmaceutical company Vivus (.gif)


