If you’ve spent time researching parasite prevention for your dog, you would have probably run into these two names again and again: NexGard Spectra and Heartgard Plus. Both are well-known and commonly used for heartworm prevention in dogs. But underneath the surface, they’re built differently, and that difference is important to understand while evaluating what your dog actually needs. This blog covers the comparison between NexGard Spectra and Heartgard Plus in detail to help you make an informed decision.
Overview of NexGard Spectra and Heartgard Plus
NexGard Spectra
What is NexGard Spectra for Dogs?
NexGard Spectra for dogs is a once-monthly chew that provides broad-spectrum parasite protection against fleas, certain ticks, mites, heartworm, and intestinal worms like roundworm, hookworm, and whipworm. It comes in a highly palatable beef-flavored chew form for convenient administration. NexGard Spectra can be given to puppies from 8 weeks of age, and 4.4 pounds (2 kg) bodyweight.
How Does NexGard Spectra for Dogs Work?
NexGard Spectra works through its two active ingredients: Afoxolaner, which targets fleas and ticks, and Milbemycin oxime, which covers heartworm prevention along with several intestinal worms. The active ingredients in NexGard Spectra are absorbed within 4 hours, resulting in rapid protection for your dog.
Heartgard Plus
What is Heartgard Plus for Dogs?
Heartgard Plus is an oral heartworm preventive for dogs, which is also indicated for the treatment and control of roundworms and hookworms. Like NexGard Spectra, it comes as a real-beef chew, which is given once a month. Heartgard Plus is recommended for dogs 6 weeks of age and older.
How Do Heartgard Plus Chews Work?
Heartgard Plus chews contain two active ingredients, Ivermectin and Pyrantel. The Ivermectin works to prevent heartworm disease by allowing the immune system to recognize and inactivate heartworm larvae before they can develop into adults. The Pyrantel treats and controls roundworms and hookworms.
Similarities between NexGard Spectra and Heartgard Plus
Both NexGard Spectra and Heartgard Plus:
- Come in beef-flavored chew form.
- Are given once a month.
- Prevent heartworm disease in dogs.
- Treat and control roundworms and hookworms in dogs.
- Are dosed according to the dog’s weight.
Difference Between NexGard Spectra and Heartgard Plus
Active Ingredients
NexGard Spectra contains Afoxolaner and Milbemycin oxime, whereas Heartgard Plus contains Ivermectin and Pyrantel.
Parasite Coverage
External parasite coverage:
NexGard Spectra covers fleas, certain ticks, as well as specified mange and mite infestations. In comparison, Heartgard Plus is not labeled for external parasites, including fleas and ticks.
Intestinal parasite coverage:
NexGard SPECTRA is indicated for the treatment and control of whipworms. Comparatively, Heartgard Plus does not provide protection against whipworms.
Age and Weight Requirement
NexGard SPECTRA can be used starting at 8 weeks of age and at least 4.4 pounds (2 kg) bodyweight. Heartgard Plus chews are suitable for dogs 6 from weeks of age, and there’s no minimum weight requirement to worry about.
Quick Comparison Table of NexGard Spectra and Heartgard Plus
Which Option Fits Your Dog?
It really comes down to what your dog is exposed to. Your dog’s geographic location plays a role too. Some regions have heavier flea and tick exposure than others, and mosquito activity varies as well.
NexGard Spectra may be an option for a dog that needs flea and tick protection alongside heartworm prevention. Comparatively, Heartgard Plus may suit a dog whose main need is heartworm and intestinal parasite coverage.
Your veterinarian is really the best person to help you determine these factors and confirm which parasite prevention option is right for your dog based on their needs.
Also check: Joint Health in Dogs – Common Causes, Signs & Effective Support Methods
Final Thoughts
At the end, NexGard Spectra vs. Heartgard Plus is ultimately a comparison of two different parasite-prevention approaches. NexGard Spectra is labeled for broad protection against fleas, certain ticks and mites, heartworm, and specified intestinal worms. Heartgard Plus keeps things more focused on heartworm plus roundworms and hookworms.
NexGard Spectra and Heartgard Plus are widely used among pet parents and veterinarians. Now, it depends on your dog’s risk factors and what you and your veterinarian decide. You can also explore flea and tick treatments for dogs and other dog care products at DiscountPetCare. And, if you still have any questions, do not hesitate to call your veterinarian for better guidance.
Frequently Asked Questions
Q. Do NexGard Spectra and Heartgard Plus treat an existing heartworm infection?
A. No. Both NexGard Spectra and Heartgard Plus labels are explicit that they prevent heartworm disease; neither is effective against adult heartworm infections. Additionally, the use of NexGard Spectra in heartworm-positive dogs has not been evaluated.
Q. Can I switch from one product to the other?
A. It’s worth confirming timing and any transition steps with your veterinarian rather than simply switching the product.
Q. What happens if I miss a monthly dose?
A. A missed dose can create a gap in continuous parasite protection. If you miss a dose, follow the product label’s instructions for resuming treatment, and consult your veterinarian if you are unsure what to do.
