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What is NexGard Spectra for Dogs?

NexGard Spectra is an upgraded formula of the original NexGard, which controls tick and flea infestations on dogs. NexGard Spectra contains an additional active ingredient (Milbemycin Oxime) that protects your pet against heartworms and other intestinal parasites.

This means that with the administration of a single monthly chewable you can: kill fleas, kill ticks (including Rocky Mountain wood tick, brown dog tick), prevent the development of heartworm, and control roundworms, hookworms and whipworms.

As with all heartworm medications, this is a preventative measure and it is important that your dog is first tested for existing heartworm.

Benefits

  • Broad-spectrum treatment protects from multiple parasites
  • Fast acting formula kills fleas in 6-8 hours
  • Comes in a tasty beef-flavored chew for easy administration
  • No more mess from topical preventatives

Is NexGard Spectra suitable for my dog?

NexGard Spectra is suitable for use with dogs and puppies from 8 weeks of age, with a minimum body weight of 4.5 lbs (2 kg). NexGard Spectra has not been evaluated as safe for use on pregnant or lactating dogs.

Dosage Schedule

NexGard Spectra is given as a once-a-month chewable, with the exact dosage based on your dog’s body weight.

Body weight Chewable size (g) Afoxolaner (mg) Milbemycin Oxime (mg)
4.5- 8 lbs (2-3.5 kg) 0.5 9.4 1.9
8-16 lbs (3.6-7.5 kg) 1 18.8 3.8
16-33 lbs (7.6-15 kg) 2 37.5 7.5
33-66 lbs (15.1-30 kg) 4 75.0 15.0
66-130 lbs (30.1-60 kg) 8 150.0 30.0

NexGard Spectra may be offered to your dog by hand, or broken up into pieces and included with their food. If hidden in food, make sure that the tablet has been swallowed. It is not necessary to administer the chewable with a meal.

What are the side effects of NexGard Spectra?

Reported side effects include vomiting, diarrhea, lethargy and loss of appetite.

What precautions must be taken?

  • Keep out of reach children and animals.
  • Not for human use.
  • Not for feline use.
  • Do not give to dogs under 8 weeks of age.
  • Do not give to dogs weighing less than 4.5 lbs (2kg).
  • The safe use of NexGard Spectra with breeding, pregnant or lactating dogs has not been evaluated.

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Nexgard Spectra for Dogs

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    Kyle G.
    No More Needles, No More Worries
    I used to get that 6-month shot at the vet for my dogs, but something clearly changed with the formula. Both of them—Bear (my massive Saint Bernard) and Diesel (my laid-back Rhodesian Ridgeback)—had terrible reactions. It took multiple vet visits, antibiotics, and tests to figure it out, and I ended up spending over a grand just to get them healthy again. It was scary and frustrating, and I knew I couldn’t risk it a second time. That’s when I switched to NexGard Spectra, and honestly? Best decision ever. The chews are way easier—no appointments, no stress, and my dogs actually want to take them. They think it’s a treat instead of getting stabbed with a needle. PetBucket has an awesome deal on the 6-pack, especially for bigger dogs. Fast shipping too. I’ve got peace of mind knowing they’re protected from everything—fleas, ticks, heartworm, the works—and they’re happy and healthy. I’m never going back to shots.
    Lori R.
    One and Done Protection for My Pack
    NexGard Spectra has been a total game changer for my two dogs, Luna (my sweet Standard Poodle) and Moose (my goofy Weimaraner-Great Dane mix). It’s such a relief to have one product that covers everything—fleas, ticks, heartworm, and intestinal worms. No more juggling multiple meds or worrying about what I might’ve missed. The price on PetBucket is incredible compared to what I used to pay at the vet. The 6-pack saves me money and hassle, and it ships fast. Plus, both dogs actually like taking it—no more hiding pills in peanut butter! If you want to keep your dogs protected and make your life easier, this is the way to go. I wouldn’t use anything else now!
    Patrick McFadden
    Nexgard Spectra
    NexGard Spectra is absolutely amazing! It gives me complete peace of mind knowing both of my Irish Wolfhounds, Brutis and Popeye, are fully protected from fleas, ticks, and worms—all in one simple dose. With giant breeds like mine, having a product that covers everything is a lifesaver. PetBucket makes it even better by offering such a great deal on the 6-pack. It’s super convenient and cost-effective, and shipping was fast too. Brutis and Popeye both take it without a fuss, and I love not having to juggle multiple medications. Highly recommend for anyone with big dogs who wants reliable, all-in-one protection without the stress!
    Prina
    Fast delivery and good quality
    I ordered it to Korea. The delivery was fast and it arrived well. It's nice to be able to get rid of your dogs' tick worries thanks to this product. I'll order again!
    Heather
    Excellent Product
    I bought this for my puppy after being charged $50/month for Simparica Trio by my vet. Doing my research, this is, by far, the superior product and still a lot cheaper than buying in the US. Shipping is a little slow, but it will get to you.