Pet Health

Medications to Prevent Heartworm Disease for Dogs

Discover essential medications to prevent heartworm disease in dogs. Keep your furry friend safe and healthy with our comprehensive guide on prevention options!
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
Dog receiving medication from a veterinarian to prevent heartworm disease, emphasizing pet health and preventive care.

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Heartworm disease can be a silent and deadly threat to dogs, and as a pet parent, you want to do everything possible to protect your furry friend. Fortunately, heartworm disease is preventable with the right medications and care. But with so many options out there, it’s easy to feel overwhelmed. Let’s walk through everything you need to know about heartworm prevention, so you can make the best decision for your dog’s health and well-being.

🩺 Vet Recommendations

Heartworm disease is caused by a parasite transmitted through mosquito bites. Once infected, the worms grow inside a dog’s heart and lungs, leading to potentially life-threatening complications. Prevention is key, as treatment for heartworm disease can be expensive, invasive, and risky for your dog.

Veterinarians recommend year-round prevention to protect dogs from heartworm disease. Preventative medications are highly effective and come in various forms, including oral tablets, topical treatments, and injections. Regular use of these medications ensures your dog is protected even if you live in an area with a high mosquito population.

Here are the most commonly recommended types of heartworm preventatives:

  • Monthly oral medications
  • Topical treatments applied to the skin
  • Long-acting injectable medications administered by a vet

Talk to your veterinarian about the best option for your dog based on their lifestyle, health status, and your preferences as a pet owner.

📋 Care Tips

When using heartworm prevention medications, it’s important to follow your vet’s instructions carefully. Here are some practical tips to ensure your dog stays protected:

  • Administer oral medications on the same day each month to maintain consistent protection.
  • If using a topical treatment, make sure your dog’s skin is clean and dry before application.
  • Schedule reminders on your phone or calendar to avoid missing doses.
  • For injectable preventatives, visit your veterinarian as recommended for timely administration.
  • Have your dog tested for heartworm annually, even if they are on preventative medication. This ensures the prevention plan is working effectively.

Remember, prevention is far easier and more affordable than treating heartworm disease after an infection occurs.

✅ Do’s and Don’ts

To keep your dog safe from heartworm disease, follow these essential do’s and don’ts:

  • Do consult your vet before starting any heartworm medication.
  • Do ensure your dog is heartworm-free before beginning a prevention program, as administering preventatives to an infected dog can lead to complications.
  • Do keep your dog indoors during peak mosquito activity, such as early morning and evening.
  • Don’t skip doses or assume your dog doesn’t need protection during colder months. Mosquitoes can be active year-round in many regions.
  • Don’t use heartworm medications designed for other animals, as they may not be safe for dogs.

By staying consistent and informed, you can protect your dog from this dangerous disease and give them the long, healthy life they deserve.

💡 Expert Advice

Choosing the right heartworm prevention plan for your dog may seem complicated, but you don’t have to do it alone. Your veterinarian is your best resource for understanding your dog’s unique needs and selecting the safest, most effective option.

Additionally, keep in mind that some heartworm preventatives also protect against other parasites, such as fleas, ticks, and intestinal worms. Discuss combination options with your vet if you’re looking for broader protection in a single product.

Finally, prevention is a year-round commitment. Even if mosquitoes are less active during the winter months, there’s still a risk of infection in many areas. Staying consistent with your prevention plan ensures your dog is protected no matter the season.

FAQs

Q: What happens if I miss a dose of my dog’s heartworm medication?
A: Missing a dose can leave your dog vulnerable to infection. If you’ve missed a dose, contact your veterinarian immediately for guidance. They may recommend restarting the medication and possibly testing for heartworms before resuming a prevention schedule.

Q: Can indoor dogs get heartworm disease?
A: Yes, indoor dogs are still at risk. Mosquitoes can enter your home, and even one bite from an infected mosquito can transmit heartworm larvae. Year-round prevention is essential, regardless of whether your dog spends most of their time indoors.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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