NexGard is a commonly used medication for preventing flea and tick infestations in dogs. In the United States, it is generally sold with a prescription from a veterinarian, as it contains ingredients that require professional oversight for safe usage. Despite this, some pet owners may look for ways to obtain NexGard without vet prescription. While it is possible to find online sources or alternative outlets offering the medication without a prescription, it is crucial to emphasize the importance of veterinary guidance. Using such treatments without a professional's advice could lead to improper dosage or adverse health effects for pets.