6 MONTH Heartgard Plus Brown for Dogs 51-100 lbs

List Price: $80.99
Sale Price: $72.99
Code: heartbrown6
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Heartgard Plus is a monthly preventative that treats heartworms, microfilaria, hookworms, and roundworms. It is used to kill or prevent parasitic diseases. The active ingredients in this medication are ivermectin and pyrantel pamoate. Together, these ingredients control a wide spectrum of parasites by causing neurological damage to the parasites.


Dogs (6+ weeks of age, no weight requirement)


  • Effectively prevent heartworms
  • Treat and control roundworms & hookworms
  • Only given once a month
  • Delicious beef flavor makes them easy to administer

How it works:

Heartgard Plus Chewables contain ivermectin, a broad-spectrum antiparasitic medication used to prevent heartworms. They also contain Pyrantel Pamoate, an anthelminthic, used to prevent roundworms and hookworms.

Studies have indicated that certain dogs of the herding breeds are more sensitive to the effects of ivermectin administered at elevated dose levels due to the MDR1 gene. Dog breeds that may be affected include Australian Shepherd, Australian Shepherd Mini, Border Collie, Collie and English Shepherd.


Should be stored at room temperature.

Do not remove the chewable from its wrapper until ready to give to your pet.
  • Give Heartgard Plus Chewables once a month on the same day of each month year round.
  • Heartgard Plus Chewables are for dogs only. Do not give to cats.
  • Heartgard Plus Chewables should not be swallowed whole.
  • Chewables may be broken and fed to dogs as pieces, or crumbled and mixed with food.
  • Watch your dog closely following dosing to be sure the entire dose has been swallowed. If it is not completely swallowed, give one more full recommended dose as soon as possible.
Weight range (lbs) Weight range (kg) Dosage
Up to 25lbs Up to 11.4kg 1 chewable every month (Blue Box)
26-50lbs 11.8-22.6kg 1 chewable every month (Green Box)
51-100bs 23-45.3kg 1 chewable every month (Brown Box)
Over 100lbs Over 45.3kg Combination of chewables based on weight


Heartgard Plus Chewables may cause sensitivities in herding dog breeds. Heartgard Plus Chewables should be chewed, not swallowed whole. The chewables may be broken into pieces and fed to dogs that normally swallow treats whole. Make sure that your dog eats the entire dose. It is important to give your dog Heartgard Plus Chewables every month, year round. Do not skip winter months, as your dog may become infected if left unprotected. If you miss more than two months of dosage, please consult with your veterinarian as to whether to continue medication.

Possible side effects:

Adverse reactions and serious side effects are rare, however, they can occur. In the case of a more serious side reaction, seek immediate veterinary attention. Serious reactions include vomiting, depression/lethargy, diarrhea, shaking, seizures, uncontrollable body movements, or unusual salivation.