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NexGard Spectra for Dogs

Nexgard Spectra (Afoxolaner/ Milbemycin)

Also known as: Nexgard

Pet Size

Don't know your pet's weight?

If you can't get them on the scale, try this super simple method:

  1. Weigh yourself.
  2. Weigh yourself holding your pet.
  3. Subtract the two numbers to get their weight.

Too heavy to hold? Your vet will weigh them if you ask (or may already have it on file if you call).


No Prescription Required

  • Description

    Nexgard Spectra is a chewable flea and tick tablet for dogs that works to prevent heartworms and kill intestinal worms too. Dogs should be able to enjoy the outdoors without having their health put at risk by parasites, and Nexgard Spectra is the best choice for being an all in 1 flea, tick, and worm medication. Plus, your dog is going to find the beef flavor mighty tasty! Give it to them once a month and rest easier knowing these parasites have no chance at all.


    Dogs get Nexgard Spectra flea killer chews once a month, and you give them to them around the same day/time each month. Many owners set a reminder on their phones. Follow this dosage schedule for Nexgard Spectra and order the correct product accordingly:

    Nexgard Spectra for XSmall Dogs (4.4-7.7 lbs) Orange
    Nexgard Spectra for Small Dogs (7.7-16.5 lbs) Yellow
    Nexgard Spectra for Medium Dog (16.5-33 lbs) Green
    Nexgard Spectra for Large Dogs (33-66 lbs) Purple
    Nexgard Spectra for Xlarge Dogs (66-132 lbs) Red

    Your pet can have one Nexgard Spectra with or without dog food, and breaking up flea and tick chews into smaller pieces is a good way for some dogs.


    The active ingredient in Nexgard Spectra for Dogs are Afoxolaner and Milbemycin Oxime.


    Nexgard Spectra flea, tick, and worm prevention tablets are exclusively for dogs and should not be administered to any other pets, including cats. For dog use only. Dogs under 8 weeks of age should not be given Nexgard Spectra. Dogs weighing less than 4.5 lbs (2kg) are not approved to take the 0.5g dosage of Nexgard Spectra.

    The safety of this product for breeding, pregnant, or lactating dogs has not been clinically evaluated. Pet owners should either use it with caution or speak to their veterinarian about other flea and tick prevention alternatives for dogs. Keep out of reach of children and animals.


    There are no known interaction risks between Nexgard Spectra flea tick and worm chews and other Rx drugs.

    Side Effects

    Side effects related to use of Nexgard Spectra for Dogs flea tick and worm are uncommon. Some animals may experience vomiting, diarrhea, lethargy or loss of appetite. When symptoms are observed you should discontinue use immediately and consider talking with your veterinarian about worm prevention and flea and tick control alternatives.

    Frequently Asked Questions about NexGard Spectra

    What is NexGard Spectra?

    NexGard Spectra is a wide-spectrum treatment for dogs. It’s a beef-flavored chewable that treats flea and tick infestations, intestinal worm infections, and prevents heartworm disease.

    How does NexGard Spectra work?

    NexGard Spectra kills fleas, ticks, mites, and intestinal worms. It combines two active ingredients: Afoxolaner (for ectoparasites) and Milbemycin Oxime (for endoparasites).

    What is the difference between NexGard and NexGard Spectra?

    NexGard only targets fleas and ticks, while NexGard Spectra provides broader protection by also eliminating intestinal worms and preventing heartworm infection.

    Do you need a prescription for NexGard Spectra?

    Yes, NexGard Spectra is a prescription product in Canada. You can purchase it from a Canadian veterinarian.

    How often should NexGard Spectra be given?

    Administer NexGard Spectra once a month, ideally on the same day each month, for continuous protection.

    How fast does Nexgard Spectra work?

    It starts working rapidly, killing fleas within hours and ticks within 48 hours of administration.

    How long does Nexgard Spectra last?

    NexGard Spectra provides protection for an entire month. Administer it monthly year-round.

    Is Nexgard Spectra safe for dogs?

    Nexgard Spectra is generally considered safe for most dogs. However, some common side effects include vomiting, diarrhea, itching, lethargy, and loss of appetite. There have also been reports of severe side effects, including seizures.

    Is Nexgard Spectra safe for pregnant dogs?

    Nexgard Spectra has not been specifically tested for use in pregnant or lactating dogs, and its safety in these cases is unknown. However, according to the manufacturer’s recommendations, Nexgard Spectra is safe for use in pregnant bitches from day 42 of pregnancy until the day of whelping. It is essential to consult a veterinarian before administering it to a pregnant dog.

    Product Code : 13196

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