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


Dogs (at least 6 weeks of age)


Heartgard is used to prevent heartworm infections.

Active Ingredients



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.

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.


Heartgard Chewables should be given orally as directed by your veterinarian.

Product Notes is not a licensed pharmacy.

All prescription products (excluding prescription food) fulfilled by VetSource. VetSource only ships to the contiguous 48 US states.

You must have a valid veterinarian-client-patient relationship to request prescription products from VetSource. Prescription requests are subject to a drug utilization review by a licensed pharmacist at VetSource for patient safety.

All prescription products (excluding prescription food) are FDA approved, or EPA licensed, to be sold in the US.

Most prescription products cannot be returned, however, Hill's Prescription Diet products can be returned.

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Heartgard Chewables Canine - (Blue) - up to 25 lbs - 6 ct

$35.89 SALE

All prescription products filled by VetSource Pharmacy.
More infomation.
Weight Count Unit Price
Heartgard Chewables Canine (Blue) - up to 25 lbs 6 ct
Limit Reached
Heartgard Chewables Canine (Green) - 26-50 lbs 6 ct
Limit Reached
Heartgard Chewables Canine (Brown) - 51-100 lbs 6 ct
Limit Reached
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