Interceptor vs Heartgard: What's the Cost Difference in Calgary?

Interceptor and Heartgard are two of the most commonly prescribed monthly heartworm preventives for dogs in Calgary. They cover slightly different sets of intestinal parasites, and their cost varies with weight, formulation, and where you fill the prescription.

This guide compares them in a neutral, plain-language way. It does not recommend one over the other, does not include dosing, and does not tell you to change what your vet has prescribed.

Why heartworm prevention is discussed in Calgary

Heartworm risk varies across Canada, and travel history matters. Dogs that travel to warmer regions, or that came from those regions, are often on year-round prevention. Local Calgary dogs may follow a different plan. Your vet will assess risk and recommend a schedule based on your dog's history.

How Interceptor is used

Interceptor is a monthly oral heartworm preventive that also covers certain intestinal parasites. It is prescription-only in Canada and is dosed by weight.

How Heartgard is used

Heartgard is a monthly oral heartworm preventive available in different formulations. Some versions add coverage for certain intestinal parasites, while others focus on heartworm. It is prescription-only and dosed by weight.

Coverage side-by-side

Feature	Interceptor	Heartgard
Format	Monthly oral	Monthly oral
Heartworm prevention	Yes	Yes
Intestinal parasite coverage	Yes, per label	Depends on formulation
Weight bands	Multiple	Multiple
Flavour options	Yes	Yes

What shapes the price in Calgary

Cost differences come from:

• Weight band. Larger dogs pay more per dose.
• Formulation. Some versions add coverage and cost more.
• Pack size. Six- or twelve-month supplies often cost less per dose.
• Fulfillment channel. Clinic pickup and prescription delivery are often priced differently.

Combination versions and why they cost more

Both product families have combination versions that layer additional coverage on top of heartworm prevention. Combinations can reduce the number of separate products in the household, but they usually cost more per dose than the base heartworm-only version. Your vet will consider whether combination coverage is appropriate for your dog.

Filling either prescription through VetFaster

The workflow is the same for either product:

1. Your Calgary vet writes the prescription.
2. The clinic faxes it to VetFaster.
3. You confirm the order online.
4. A licensed Alberta pharmacy dispenses.
5. Delivery arrives at your home.

Live pricing is available on our medicines catalogue.

Delivery across Alberta

VetFaster delivers within 72 hours across Alberta, including Calgary, Airdrie, and Chestermere. You do not need to visit a clinic just for pickup.

Frequently Asked Questions

Is Interceptor or Heartgard cheaper?

It depends on weight, formulation, pack size, and current pricing. Compare live prices on the medicines catalogue.

Can I switch between them?

Only under your vet's guidance. Switching heartworm products involves timing considerations.

Do I need heartworm prevention year-round in Calgary?

That depends on your dog's history and lifestyle. Your vet will decide the schedule.

Are both prescription-only in Canada?

Yes. Both require a veterinary prescription.

How fast can either be delivered?

Within 72 hours across Alberta once the prescription and order are ready.

What if my dog misses a dose?

Contact your veterinarian for guidance. VetFaster does not provide dosing advice.

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