Interceptor for Medium Dogs 26-50 LBS [Yellow] protects against heartworm [Dirofilaria immitis] infestation. It prevents intestinal worms in dogs including hookworms, roundworms, whipworms, and tapeworms including Hydatid tapeworms. This monthly oral treatment eliminates immature heartworms. Buy Heartworms and Worms Treatment online with free shipping and earn rewards. Get up to 10% off with auto-order. Apply Coupon Code: SUMR10