China Pharma Industry Rises to the Occasion as Viagra Patent Expires

BEIJING (TheStreet) -- The thrill is back for Chinese pharmaceutical companies and their investors because Pfizer is about to lose its China patent rights for the erectile dysfunction drug Viagra. The U.S. drug giant's exclusive rights to sell the active ingredient sildenafil citrate under the trade name Viagra expires in China in July. That's expected to clear the way for at least 10 domestic ...

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