Help Protect
Your Dog

from potentially Deadly
Heartworm Disease with
HEARTGARD® Plus

You can't stop mosquito bites. But with HEARTGARD Plus, you can ​kill the heartworm larvae that are transmitted to your dog by those annoying bloodsuckers, helping to prevent heartworm disease.

 

Takes the Sting Out of

Heartworm Disease

  • Helps prevent heartworm disease in your dog
  • Kills heartworm larvae and treats and controls roundworm and hookworms.​
  • Easy-to-give—most dogs eat it right out of your hand
  • Give one each month, year-round
  • Helps avoid the cost of treating heartworm disease and the risk of possible death from heartworm disease
  • Available by prescription from a veterinarian—annual testing for heartworm disease is recommended

IMPORTANT SAFETY INFORMATION:
HEARTGARD Plus is well tolerated. All dogs should be tested for heartworm infection before starting a preventive program. Following the use of HEARTGARD Plus, digestive and neurological side effects have rarely been reported. For more information, contact your veterinarian or click here for full prescribing information.

All in a delicious real-beef chew that dogs love.1

It's the #1 Choice of Vets1

For Heartworm Disease Prevention

HEARTGARD Plus is the most recommended heartworm disease preventive for dogs.1 Ask your vet about heartworm testing and the importance of year-round use.

Select your dog's weight to find the right size.

For use in dogs only.

up to 25 lbs 26 to 50 lbs 51 to 100 lbs  
 
 

IMPORTANT SAFETY INFORMATION:
HEARTGARD Plus is well tolerated. All dogs should be tested for heartworm infection before starting a preventive program. Following the use of HEARTGARD Plus, digestive and neurological side effects have rarely been reported. For more information, contact your veterinarian or click here for full prescribing information.

HEARTGARD Plus
and the Heartworm

Life Cycle

After a bite from an infected mosquito, heartworm larvae migrate through the tissue. After three months, they enter the bloodstream and end up in the pulmonary artery. Left untreated, larvae can grow into adult worms in just over 6 months—leading to heart, lung, liver and kidney damage.

HEARTGARD Plus kills the larvae—preventing adult heartworms.

HEARTGARD Plus kills heartworm larvae, preventing them from developing into adult heartworms. See for yourself with the interactive diagram by selecting the buttons below.

  • With HEARTGARD Plus
  • Without HEARTGARD Plus
 

IMPORTANT SAFETY INFORMATION:
HEARTGARD Plus is well tolerated. All dogs should be tested for heartworm infection before starting a preventive program. Following the use of HEARTGARD Plus, digestive and neurological side effects have rarely been reported. For more information, contact your veterinarian or click here for full prescribing information.

3x Killer

Kills heartworm larvae. Plus treats and
controls roundworms and hookworms.

HEARTGARD Plus treats and controls 3 species of hookworms and 2 species of roundworms. It kills heartworms in the larvae stage and prevents possible serious damage to your dog.

 
 
 
 

Heartworm

Roundworm

Hookworm

So Many Ways to Help Protect Your Pet

HEARTGARD Plus is just one of the many Merial® products designed to help protect your dog. Learn more about some of them detailed here. Then speak with your vet.

 
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