BRIEF-Pain Therapeutics down 43 pct, DURECT down 36.5 pct premarket

NEW YORK Fri May 10, 2013 8:16am EDT

NEW YORK May 10 (Reuters) - Pain Therapeutics Inc : * Shares down 43 percent, DURECT Corp down 36.5 percent in premarket

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A couple walks along the rough surf during sunset at Oahu's North Shore, December 26, 2013. REUTERS/Kevin Lamarque

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