Interceptor Plus price comparison
Interceptor Plus is a monthly prescription chew that prevents heartworm disease and treats roundworms, hookworms, whipworms, and tapeworms in dogs. Its five-worm coverage, including tapeworm, is the broadest among common heartworm preventatives.
| Pharmacy | Price | per dose | Last checked | Link |
|---|---|---|---|---|
| 1-800-PetMeds Lowest per dose | $75.79 | $12.63 | Jul 18, 2026 | Check price → |
| Allivet | $75.79 | $12.63 | Jul 18, 2026 | Check price → |
| Chewy | Check site | — | First check pending | Check price → |
| Costco Pharmacy Membership required. No affiliate program exists, and we include it anyway: proof that rankings are not pay to play. | Check site | — | First check pending | In warehouse / member site |
| PetCareRx | Check site | — | First check pending | Check price → |
| Petco | Check site | — | First check pending | Check price → |
| Walmart Pet Rx | Check site | — | First check pending | Check price → |
Ranked by verified per dose only; ties listed alphabetically. Unverified pharmacies are listed alphabetically below priced ones. Outbound links may become affiliate links; that never affects the order. Disclosure · Methodology
Price history: tracking since Jul 18, 2026. Trend charts appear once we have multiple verified checks on record.
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Why the same box costs so much more at the vet
Vet clinics buy medications in small quantities and price them with a margin that helps keep the practice running. That is not a scam, but it does mean paying 2 to 3 times the online price for the identical product is common.
Large online pharmacies buy in volume and compete with each other in public, which pushes prices down. Promotions move prices around too: first-order coupons and autoship discounts can shift the effective price by 5 to 30 percent, so we list base prices and note promotions separately instead of mixing them together.
For prescription meds like Interceptor Plus, every accredited pharmacy performs the same step: it contacts your vet and verifies the prescription before shipping. The verification is identical everywhere, so a higher price does not buy better service.
Common questions
What does Interceptor Plus cover that Heartgard Plus does not?
Interceptor Plus adds whipworm and tapeworm coverage. Heartgard Plus covers heartworm, roundworm, and hookworm. Which coverage matters depends on your region and your dog's exposure, so ask your vet.
Do I need a prescription for Interceptor Plus?
Yes. Online pharmacies verify the prescription with your vet before shipping, and most vets require a recent negative heartworm test to authorize it.
Does Interceptor Plus cover fleas or ticks?
No. It is a parasite preventative only. Flea and tick protection requires a separate product or a combination preventative.
General information only, not veterinary advice. Always consult your veterinarian about your pet's medications.