Best Heartworm Protection for Dogs: Top Preventives and Treatments 2025
Protecting your dog from heartworm disease is crucial for their health and well-being. With a variety of options available, finding effective heartworm prevention that also addresses other parasites can simplify your pet’s care. Below is a comparison table of some of the best heartworm protection products, each offering unique features to suit different dog sizes and needs.
| Product | Brand | Weight Range | Key Features |
|---|---|---|---|
| HEARTGARD® Plus Chewables | HEARTGARD | 51-100 lbs | Prevents heartworm, controls roundworms & hookworms |
| NexGard Plus Soft Chewables | NexGard | 33.1-66 lbs | Heartworm prevention, flea & tick control, kills five tick species |
| Trifexis 5-in-1 Protection | Trifexis | 40.1-60 lbs | Treats heartworm, fleas, roundworms, hookworms, whipworms |
| Interceptor Plus Monthly Chewable | Interceptor | 25.1-50 lbs | Prevents heartworm, treats 5 types of worms, real chicken flavor |
| NexGard Flea & Tick Protection | NexGard | 60.1-121 lbs | Flea and tick control; FDA-approved to prevent Lyme disease |
HEARTGARD® Plus Chewables for Dogs 51-100 lbs
HEARTGARD® Plus is a vet-recommended heartworm preventive trusted by many pet owners. Its active ingredients, ivermectin and pyrantel, not only prevent heartworm disease but also effectively treat and control common intestinal parasites such as roundworms and hookworms. This product is designed for dogs weighing between 51 and 100 pounds and is supplied as chewable tablets that are easy to administer. Its brown box packaging contains a 6-month supply, offering convenience and consistency for pet care.
NexGard Plus Flea, Tick & Heartworm Protection 33.1-66 lbs
NexGard Plus combines heartworm prevention with fly and tick protection in convenient soft beef-flavored chewables. Suitable for dogs weighing 33.1 to 66 pounds, it provides a simple, once-a-month dosage to cover multiple parasites. This formula kills adult fleas and five species of ticks, reducing the risk of infestations and tick-borne diseases. It’s designed to integrate parasite control into your dog’s monthly care routine easily.
Trifexis 5-in-1 Heartworm & Flea Treatment for Dogs 40.1-60 lbs
Trifexis offers comprehensive protection by combining heartworm prevention with flea treatment and control of multiple worms such as roundworms, hookworms, and whipworms. Specifically formulated for dogs between 40.1 and 60 pounds, Trifexis starts killing fleas within 30 minutes and eliminates 100% of adult fleas within 4 hours. This chewable treatment covers several parasites in one dose, making it a strong option for multi-parasite protection.
Interceptor Plus Chewable for Heartworm & Worms 25.1-50 lbs
Interceptor Plus is notable for protecting against a wide range of worms, making it a versatile monthly chewable for dogs 25.1 to 50 pounds. It effectively prevents heartworm disease while also treating hookworm, roundworm, whipworm, and tapeworm infections. The chewables are flavored with real chicken to encourage easy consumption, supporting consistent use essential for parasite protection.
NexGard Flea and Tick Protection for Dogs 60.1 to 121 lbs
While NexGard focuses primarily on flea and tick control for dogs weighing 60.1 to 121 pounds, it supports overall parasite prevention by killing fleas fast and protecting against ticks that can cause Lyme disease. Though it is not a heartworm preventive, NexGard’s rapid flea and tick control complements heartworm preventives by reducing other parasite-related risks. This product is a good addition for broad parasite management on larger dogs.
Buying Guide for Heartworm Protection for Dogs
When choosing the best heartworm protection for your dog, consider the following key factors to ensure effective and comprehensive parasite prevention:
1. Dog’s Weight and Size
Select a product that matches your dog’s weight class for appropriate dosing and safety. Most heartworm treatments specify weight ranges on the packaging.
2. Spectrum of Parasite Protection
Many heartworm preventives also target other intestinal worms and parasites such as roundworms, hookworms, whipworms, fleas, and ticks. If your dog is at risk for multiple parasites, consider a combination product for convenience.
3. Administration Form and Frequency
Heartworm preventives come mainly as chewables or topical solutions. Monthly dosing is most common. Choose a form your dog accepts easily to maintain consistent treatment.
4. Veterinary Recommendations and Approvals
Look for products recommended by veterinarians and approved by the FDA or equivalent authorities. This ensures safety and efficacy validated by scientific research.
5. Additional Parasite Concerns
If fleas and ticks are a concern in your area, opting for a product that covers these parasites in addition to heartworm may simplify your pet care routine.
6. Sensitivities and Health Considerations
Some dogs may react differently to certain ingredients or have pre-existing health conditions. Consult your veterinarian before starting any new preventive treatment.
7. Convenience and Cost-Effectiveness
Consider the supply size and cost per dose, keeping in mind that consistent monthly administration is essential for effective heartworm prevention.