Interceptor Is A Convenient And Simple Way To Protect Your Dog Against Heartworm And The Major Intestinal Wormers. One Delicious Beefy Flavoured Tablet Once A Month Is All It Takes To Give Your Dog A Lifetime Of Protection Against Even The Most Dangerous Wormers. Interceptor Guarantees To Completely Prevent Heartworm And Control Hookworm, Roundworm And Whipworm In Your Dog.