Health Canada is warning the public after a Toronto convenience store was caught selling counterfeit Viagra. Granted, you probably should have been suspicious from the get-go about Viagra being sold in a convenience store. Health Canada announced on Tuesday that it had seized counterfeit Viagra pills from Rocky Convenience at 2466 St. Clair Ave. W. in Toronto. According to Health Canada, drugs like Viagra should only be used under medical supervision and can pose serious complications when combined with certain drugs. "Only buy prescription drugs from licensed pharmacies," warns Health Canada.