Heartworm Prevention

The simplest, most effective thing you can do for your dog is give them heartworm prevention every month, year-round. All FDA-approved preventives belong to a class of medications called macrocyclic lactones, and they work by eliminating any larvae that entered your dog in the previous 30 days — stopping heartworm before it ever has a chance to develop.

Common heartworm preventive options include:

  • Monthly chewables: Heartgard Plus, Interceptor Plus, Sentinel Spectrum, Simparica Trio — most also cover common intestinal parasites, and some cover fleas and ticks as well

  • Monthly topicals: Revolution Plus, Advantage Multi — applied to skin, good for dogs who resist chewables

  • Injectable (vet-administered): ProHeart 6 (every 6 months) or ProHeart 12 (once a year) — great for families who struggle with monthly consistency

Ask your vet which product makes the most sense for your dog's size, lifestyle, and the parasites most common in your area.

The Bottom Line

Heartworm disease is serious, costly, and hard on your dog. But it is also one of the most preventable diseases there is. One pill or chew per month — every month — stands between your dog and an infection that could take years off their life.

Test every year. Prevent every month. And if your dog does test positive, know that with the right treatment, most dogs make a full recovery.

Talk to your veterinarian about starting or confirming your dog's heartworm prevention plan today.

Sources: AVMA (American Veterinary Medical Association, Veterinary Partner, VCA Animal Hospitals , PetMD , American Animal Hospital Association, MedVet, PMC / NIH peer-reviewed research, Merck Veterinary Manual, VIN (Veterinary Information Network), Cornell University College of Veterinary Medicine, Sustainable Vet, American Heartworm Society (2024 Updated Canine Guidelines), the FDA, Companion Animal Parasite Council and trusted Veterinarians along my 17-year journey as a dog mom.

The Good Boy Foundation is committed to providing valuable resources and education to empower pet parents in caring for their furry companions. However, it's important to note that the information provided on our website is intended for educational purposes only and should never replace the advice or treatment provided by a licensed veterinarian. While we strive to offer accurate and helpful guidance, we cannot be held responsible for any outcomes or consequences resulting from the application of this information. Pet parents are encouraged to consult with their veterinarian for personalized guidance and recommendations tailored to their pet's specific needs and circumstances.