Heartgard Plus Chewables for Large Dogs 51 to 100 lbs (Brown) are formulated to help prevent heartworm disease while treating and controlling certain hookworms and roundworms. Designed specifically for large dogs weighing 51 to 100 pounds, this brown pack monthly chew provides targeted dosing with 272 mcg of ivermectin and 227 mcg of pyrantel per chewable tablet. Suitable for large dogs 6 weeks of age and older, it offers reliable parasite protection in an easy-to-administer, real beef-flavored chew. Given once every month as directed, this weight-specific formula supports consistent, year-round heartworm prevention and intestinal worm control for large dogs.

How It Helps

Heartgard Plus contains two trusted active ingredients, ivermectin and pyrantel that work together to protect your dog. It helps prevent heartworm disease by eliminating the early stage of the parasite before it can develop into adult heartworms. It also treats and controls certain species of hookworms and roundworms that can affect your dog’s digestive health. Given monthly, it provides continuous protection when used as directed by your veterinarian.

Who It’s For


Your veterinarian can help determine the correct strength based on your dog’s current weight.


Why Pet Parents Choose It