Heartgard Plus (Ivermectin) is a beef chewable used for the prevention of heartworm disease in dogs. When combined with pyrantel emboate it is also used for treating roundworm and hookworm in dogs.
Heartguard 30 Plus is a beef chewable which, if given to your dog monthly according to directions, prevents heartworm disease and treats and controls hookworm and roundworm infections.