User Icon
Free shipping on all orders over $49. View details >
  • HEARTGARD® is used to prevent heartworm infections.

HEARTGARD® Chewables Canine


*Prescription Required: Vetsource®, our pharmacy provider, may need to contact your veterinary hospital for prescription verification. Learn More

Your Price $46.48-$82.50
Sign In To See Pricing: You must be signed in to view pricing on this item. Login
Strength / Size
Product Information

HEARTGARD® Chewables are a once a month beef-flavored chewable that can protect your dog from the threat of potentially deadly heartworm disease. HEARTGARD® Chewables are approved for use in puppies as young as 6 weeks, small dogs regardless of weight, pregnant or breeding dogs, and Collies. Dogs 6 months of age and older should be tested for heartworm disease prior to being put on a preventive program and tested annually thereafter. Each chewable contains ivermectin.

VetSource pharmacy has a direct relationship with and is authorized to dispense Merial products.

Active Ingredients


Side Effects

There are very few side effects when the drug is given at the usual dose. Ivermectin may rarely cause a shock like reaction in dogs. If this occurs, notify your veterinarian. If you notice anything unusual, contact your veterinarian.

Developed For

Dogs (at least 6 weeks of age)

Product Benefits

HEARTGARD® is used to prevent heartworm infections.

Usage Guidelines

HEARTGARD® Chewables should be given orally as directed by your veterinarian.


There are no known drug interactions with ivermectin. It is best to always tell your veterinarian what other medications you are giving to your pet. Quite often your veterinarian may prescribe two different medications, and a drug interaction may be anticipated. In this case, your veterinarian may vary the dose and/or monitor your pet more closely. Contact your veterinarian if your pet experiences any unusual reactions when different medications are given together.

Allergic reactions to medications may occur. Be sure to inform VetSource and your veterinarian if your pet has any known drug sensitivities or allergies. If your pet displays symptoms of an allergic reaction, call your veterinarian immediately or go to a veterinary emergency clinic. Symptoms may include but are not limited to: swollen lips, tongue, face, airways; difficulty breathing; agitation; profuse salivation; vomiting; widespread hives and itching.