Canada's High Court Kills Viagra Patent In Pfizer-Teva Row

Law360, New York (November 8, 2012, 12:55 PM EST) -- The Supreme Court of Canada on Thursday voided Pfizer Inc.'s patent for erectile dysfunction treatment Viagra, finding the drugmaker didn't disclose enough about how the medicine works to deserve exclusivity and clearing the way for generic competition from Teva Pharmaceutical Industries Ltd.

In a 7-0 decision, justices faulted Pfizer for not specifically naming sildenafil citrate as Viagra’s active ingredient in a patent application approved in 1998, and said the remedy was to strip away monopoly power that had been challenged by Teva and expected to last...
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