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Look for pharmacies that are LegitScript or Vet-VIPPS (Veterinary-Verified Internet Pharmacy Practice Sites) accredited.

Avoid sites that claim "no prescription required" for U.S. customers. Buying from unverified sources carries significant risks: How to Avoid the Disasters of Counterfeit Pet Prescriptions

Buying heartworm prevention online is a convenient way to save money and stay consistent with your pet's health, but it requires careful navigation to ensure safety and legality. In the United States, from a licensed veterinarian. 1. The Legal Requirement: Why You Need a Prescription buy heartworm prevention online

A veterinarian must confirm your pet's current heartworm status via a blood test before starting or renewing a prescription.

According to reviewers from The Spruce Pets , the following are top-rated for reliability and service: Look for pharmacies that are LegitScript or Vet-VIPPS

Vets ensure the product and dose are correct based on your pet’s exact weight and health history. 2. How to Buy Online Legally To purchase safely, follow these steps:

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