Teva Pharmaceutical Industries Ltd plans to acquire specialty drugmaker Cephalon for $81.50 a share, topping an unsolicited bid by Canada's Valeant Pharmaceuticals International Inc .

Teva said the deal was worth about $6.8 billion on an enterprise basis. The deal is worth about $6.2 billion, based on the number of Cephalon shares outstanding, according to Thomson Reuters data.

(Reporting by Lewis Krauskopf; Editing by Lisa Von Ahn)

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