**Your furry friend must have a current heartworm test result on file with your veterinarian in order to be prescribed heartworm medication. Please visit your veterinarian to have this test performed annually to protect your four-legged friend.** Advantage Multi for Dogs is a broad-spectrum topical solution prescribed by veterinarians to provide a convenient monthly application to help alleviate canine companions from symptoms caused by pesky parasites. This easy-to-use topical solution helps to treat circulating microfilariae in heartworm-positive canines, fights against adult fleas, treats and controls flea infestations, and sarcoptic mange, along with common intestinal parasites including roundworms, hookworms and whipwormsthis medication may also prevent heartworm disease in some dogs. **We directly source prescription medications from manufacturers and wholesale distributors registered with the FDA and licensed by applicable state boards. Guaranteed genuine, and where applicable, backed by the manufacturer.**