Where To Buy Heartworm Medication May 2026

You cannot buy genuine heartworm preventatives over the counter for several safety reasons:

Once your pet has a current, negative heartworm test and a prescription from a vet, you can purchase medication from the following types of retailers:

: Major retailers with pet divisions, such as Walmart PetRx or Costco , often carry heartworm preventatives at lower prices. where to buy heartworm medication

Heartworm medication is a drug in the United States and must be obtained through a licensed veterinarian or a pharmacy authorized to fulfill vet prescriptions. Where to Buy Heartworm Medication

: Reputable sites like 1-800-PetMeds , Chewy, and Allivet offer competitive pricing on brands like Heartgard and Interceptor. You will need to provide your vet's information so the pharmacy can verify the prescription. You cannot buy genuine heartworm preventatives over the

: Pets must be tested for existing heartworms before starting medication. Giving preventative meds to a pet that is already heartworm-positive can cause a dangerous, sometimes fatal, reaction.

: Retailers like Petco and PetSmart have online and in-store pharmacy services that can fulfill prescriptions. Why a Prescription is Required You will need to provide your vet's information

: Most pet owners buy directly from their vet during their annual checkup. This is often the most convenient way to ensure you get the correct dosage immediately.