BUZZ-Progenics Pharmaceuticals Inc: FDA defers decision on drug
** Drug developer's shares down 11.6 pct at $3.90 premarket
** FDA extends decision date for Progenics' drug oral Relistor, a treatment for opioid-induced constipation, to July 19 from April 16
** Progenics co-developing drug with Valeant Pharmaceuticals International Inc
** FDA says three-month extension needed to review additional data
** Up to Friday's close, stock had fallen 28 pct this year
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