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Its been good for (NASDAQ: BIOD) for couple of days, until it was Tuesday the 21th of September 2010. Suddenly, the shorts came in and toasted BIOD for now, but the battle isn't over yet, and never will be.

Shares of Arena Pharma (NASDAQ: ARNA) sunk significantly after the concern from the U.S. Food and Drug Administration about the diet drug lorcaserin. In documents released Tuesday, FDA officials reviewing lorcaserin's clinical trials indicated the drug might not be effective enough to win approval.