Easy as 1-2-3

Three small steps. Big savings.

We’ve made PetTrust™ Plus (ivermectin/pyrantel) easy to buy and more affordable than other heartworm preventives so more dogs can stay heartworm-free. All you have to do is:

  1. Visit your veterinarian for a heartworm test.
  2. Ask for a prescription for PetTrust Plus.
  3. Fill your dog’s prescription at a retail pharmacy like Walmart of Sam’s Club, or call 1-800-2-REFILL.

Want Free Home Delivery?

Call 1-800-2-REFILL and Walmart will contact your veterinarian to request a prescription
on your behalf.
Walmart offers free home delivery for all orders, once they’re approved by a veterinarian.

Prescription required.

A prescription must be obtained from a veterinarian with whom there is a client-patient-veterinarian relationship. Like any other heartworm preventive medication, you must have a prescription from your veterinarian to buy PetTrust Plus. Find out why.

Remember routine veterinary care.

As with all heartworm preventives, your veterinarian will determine if your dog needs to be retested before you receive a refill. In addition to heartworm tests, regular veterinary exams are essential to maintaining your pet’s overall health.

IMPORTANT INFORMATION: Dogs should be tested for heartworms prior to use. In a small percentage of treated dogs, digestive and neurological side effects may occur. Please see full product insert for more information.