Canada's Supreme Court on Thursday decided against global drug giant Pfizer Inc in a high-profile case, ruling that a patent on its Viagra erectile dysfunction drug was no longer valid. The court backed an appeal by Israeli-based Teva Pharmaceutical Industries Ltd - the world's largest generic drug maker - which argued that Pfizer had not provided enough details when filing its patent, which runs out in 2014 in Canada.
The verdict was a unanimous 7-0. The court said Pfizer had not provided enough details to identify the active ingredient.