Interceptor Plus is a monthly, broad spectrum parasiticide used to prevent heartworm disease, as well as treat and control common intestinal parasites including roundworms, hookworms, whipworms and tapeworms. Interceptor Plus offers long-lasting protection in the convenience of a tasty, easy-to-administer chewable. The chewable tablets are chicken flavored, which is an added benefit for dogs suffering from beef allergies. Most dogs love the taste, and you can rest assured that your best friend will be protected against heartworms for a full month. Interceptor Plus requires a prescription from your veterinarian. It is available as a 6-pack, which provides six months of heartworm protection or as a 12-pack which provides 12 months of protection.