Interceptor Flavor Tabs, for dogs and cats, prevent heartworm disease while protecting your dog against roundworms and hookworms. Interceptor heartworm protection for dogs requires your dog must be tested for heartworms. For dogs, Interceptor Flavor tabs; prevent heartworm disease, adult hookworm infection, and remove adult roundworms and hookworms. For cats, Interceptor Flavor Tabs prevents heartworm disease and remove adult hookworms and roundworms. Read more about heartworm disease.