What Does NexGard Spectra Not Cover?

Discover what NexGard Spectra does not cover and ensure complete protection for your pet.

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NexGard Spectra is a popular and effective flea and tick treatment for dogs. It provides comprehensive protection against a wide range of parasites, but it’s important to understand what it does not cover. In this article, we will explore the limitations of NexGard Spectra and discuss the importance of using additional preventive measures to keep your furry friend safe and healthy.

What is NexGard Spectra?

Before we delve into what NexGard Spectra does not cover, let’s first understand what it is and how it works. NexGard Spectra is a chewable tablet that combines two powerful active ingredients, afoxolaner and milbemycin oxime. Afoxolaner kills fleas and ticks by targeting their nervous system, while milbemycin oxime prevents heartworm disease and treats and controls intestinal worms.

NexGard Spectra is easy to administer, highly palatable, and provides month-long protection against a variety of parasites. It is a trusted choice for pet owners looking for a convenient and effective solution to protect their dogs.

Flea and Tick Coverage

NexGard Spectra is highly effective in killing fleas and ticks, including the most common species such as the American dog tick, brown dog tick, and black-legged tick. It starts working within hours of administration, rapidly eliminating existing infestations and preventing new ones from developing.

However, it’s important to note that NexGard Spectra does not provide coverage against all species of fleas and ticks. While it covers the most prevalent ones, there may be some rare species that are not targeted by this treatment. It’s always a good idea to consult with your veterinarian to ensure your dog is protected against the specific parasites in your area.

Limited Mosquito Protection

Mosquitoes are not only annoying pests but also carriers of dangerous diseases such as heartworm. While NexGard Spectra does provide some protection against heartworm disease, it does not fully protect against mosquito bites. Mosquitoes can still bite your dog and potentially transmit diseases, so it’s important to take additional measures to prevent mosquito bites.

Using mosquito repellents specifically formulated for dogs, keeping your dog indoors during peak mosquito activity, and eliminating standing water in your surroundings can help reduce the risk of mosquito-borne diseases.

External Parasites Only

NexGard Spectra is designed to target external parasites such as fleas and ticks. It does not provide coverage against internal parasites such as tapeworms, roundworms, or hookworms. These internal parasites can cause various health issues in dogs, including gastrointestinal problems and nutrient deficiencies.

To ensure comprehensive protection against both external and internal parasites, it is recommended to use a broad-spectrum dewormer in conjunction with NexGard Spectra. Your veterinarian can guide you in choosing the most appropriate deworming treatment for your dog based on their specific needs and lifestyle.

Limited Duration of Action

While NexGard Spectra provides month-long protection against fleas and ticks, it’s important to remember that its efficacy may decrease towards the end of the treatment period. As the days pass, the concentration of the active ingredients in the dog’s system gradually decreases, making it less effective in killing parasites.

To maintain continuous protection, it is crucial to administer NexGard Spectra at regular intervals as recommended by your veterinarian. Missing a dose or delaying the administration can leave your dog vulnerable to flea and tick infestations.

Individual Sensitivities and Allergies

Just like humans, dogs can have individual sensitivities and allergies to certain medications. While NexGard Spectra is generally well-tolerated, there have been rare instances of adverse reactions reported. These may include vomiting, diarrhea, lethargy, and loss of appetite.

If your dog experiences any unusual symptoms after administering NexGard Spectra, it is important to consult your veterinarian immediately. They can provide guidance on alternative options or adjust the dosage to ensure the safety and well-being of your furry friend.

Importance of Regular Vet Check-ups

While NexGard Spectra is an effective preventive treatment, it should not replace regular veterinary check-ups. Routine visits to the veterinarian are essential to monitor your dog’s overall health and detect any potential issues early on.

During these check-ups, your veterinarian can assess the effectiveness of the flea and tick treatment, perform necessary tests for internal parasites, and recommend any additional preventive measures based on your dog’s specific needs.

In conclusion, NexGard Spectra is a highly effective flea and tick treatment for dogs, but it does have its limitations. It’s important to be aware of what it does not cover, such as certain species of fleas and ticks, mosquito bites, and internal parasites. By understanding these limitations and taking additional preventive measures, you can ensure the well-being of your beloved canine companion.


NexGard Spectra is a reliable and convenient solution for protecting your dog against fleas and ticks. However, it’s important to remember that it does not provide coverage against all species of parasites and does not protect against mosquito bites or internal parasites. By combining NexGard Spectra with other preventive measures and consulting with your veterinarian, you can create a comprehensive plan to keep your furry friend safe and healthy.

what does nexgard spectra not cover

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