Without A Vet — Where Can I Buy Heartgard

In the United States, from a licensed veterinarian . The U.S. Food and Drug Administration (FDA) regulates heartworm preventatives as prescription-only drugs to ensure they are used safely and effectively. Why a Prescription is Required

The requirement for a vet's order is based on several critical health and safety factors: Can I Get Heartworm Medicine Without a Vet? - Penny Paws