Health Canada wishes to inform Canadians that seized natural health products being sold by Lion King Health Enterprises Group Ltd., 1328-8368 Capstan Way, Richmond, BC . were tested and found to contain hidden ingredients and unauthorized substances similar to the prescription drugs, sildenafil and tadalafil. Approved products that contain sildenafil or tadalafil can only be sold with a prescription and by a pharmacy. These unauthorized products are being added to the list of products sold by this retailer that may pose a serious risk to health.