WHAT ARE THEY? HOW CAN THEY BE TREATED? Not all heartworm preventives treat and control three species of hookworms. HEARTGARD® Plus (ivermectin/pyrantel) helps prevent heartworm disease AND treats and controls three species of hookworms.

Will Heartgard kill existing hookworms?

HEARTGARD Plus not only prevents heartworm disease but also treats and controls the most common intestinal parasites, hookworms and roundworms. ... That is why it is recommended to administer HEARTGARD Plus every 30 days. Pyrantel pamoate kills roundworms and hookworms living in your dog's intestines.

Does heartworm medication kill parasites?

Yes, a number of heartworm preventives used today also are effective against certain intestinal parasites. Depending on the product, these may include hookworms, roundworms, whipworms and tapeworms.