De­sert­ed by Astel­las and Mer­ck, lit­tle Cor­re­vio still can't win over FDA pan­el con­cerned with its AFib drug's safe­ty

When the FDA spurned Astel­las’ pitch for atri­al fib­ril­la­tion drug ver­nakalant in 2008, reg­u­la­tors made it abun­dant­ly clear that it wasn’t the ef­fi­ca­cy they had a prob­lem with — two Phase III tri­als had shown the drug suc­cess­ful­ly re­stored 52% of pa­tients’ heart­beat from ir­reg­u­lar to nor­mal — but the car­dio safe­ty is­sues for a drug that was to com­pete with well es­tab­lished, low-risk op­tions. One li­cens­ing deal, one clin­i­cal hold and sev­er­al stud­ies lat­er, the chances of ap­proval aren’t look­ing any bet­ter.

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