NexGard Spectra for Dogs is a monthly beef-flavored chewable tablet that combines broad-spectrum parasite protection into one simple dose. At Smartway Pet Supplies, you can shop the full NexGard Spectra range by weight — no vet prescription required — with fast shipping to the USA and Canada.
Each monthly chew is designed to protect against fleas and ticks, prevent heartworm disease, and treat and control intestinal worms including roundworms, hookworms, and whipworms. For dog owners in the United States searching for a comparable all-in-one monthly chewable, NexGard Spectra is the product sold internationally that some U.S. shoppers may know as NexGard Plus.
What Does NexGard Spectra Cover?
NexGard Spectra chewable tablets provide protection across six parasite categories in a single monthly dose:
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Fleas — Starts killing fleas rapidly after dosing. With consistent monthly use, NexGard Spectra helps control flea infestations and interrupts the flea life cycle in your home.
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Ticks — Protects against multiple tick species including the American dog tick, brown dog tick, lone star tick, and black-legged tick. Ticks can transmit serious diseases, making consistent monthly prevention especially important for dogs that spend time outdoors.
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Heartworm Prevention — Eliminates immature heartworm larvae before they develop into adult worms. Heartworm is spread by mosquitoes and can cause severe, life-threatening illness if left untreated.
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Roundworms — Treats and controls roundworm infections, among the most common intestinal parasites in dogs.
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Hookworms — Controls hookworm infestations, which can cause significant gastrointestinal issues, particularly in puppies.
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Whipworms — Treats and controls whipworm infections, giving NexGard Spectra broader intestinal worm coverage than many other monthly chewables.
Active Ingredients in NexGard Spectra
NexGard Spectra contains two active ingredients that work together to deliver its wide coverage:
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Afoxolaner — An isoxazoline class compound that kills fleas and ticks by targeting their nervous systems. This is the same active ingredient found in standard NexGard Chewables.
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Milbemycin Oxime — Prevents heartworm disease and treats and controls intestinal worms including roundworms, hookworms, and whipworms.
Together, these two active ingredients make NexGard Spectra one of the most comprehensive monthly chewables available for dogs.
NexGard Spectra vs. NexGard — What Is the Difference?
|
NexGard |
NexGard Spectra |
| Fleas |
✅ |
✅ |
| Ticks |
✅ |
✅ |
| Heartworm Prevention |
❌ |
✅ |
| Roundworms & Hookworms |
❌ |
✅ |
| Whipworms |
❌ |
✅ |
If you only need flea and tick protection, standard NexGard Chewables may be sufficient. If you want a single monthly chew that also covers heartworm and intestinal worms, NexGard Spectra is the more complete option.
NexGard Spectra Sizes — Shop by Dog Weight
NexGard Spectra chewable tablets are available in four weight-based sizes. Always choose the pack that matches your dog's current body weight. Using the correct size is essential for proper monthly dosing and effective parasite protection.
If your dog is close to a weight cutoff, weigh them carefully before ordering. Always choose the pack that matches your dog's current body weight for proper monthly dosing.
NexGard Spectra and NexGard Plus — A Note for U.S. Shoppers
If you are shopping from the United States and searched for NexGard Plus, you are in the right place. NexGard Plus is the name used in the U.S. market for a monthly chewable with a comparable broad-spectrum coverage profile. The product sold internationally — and available here at Smartway Pet Supplies — is NexGard Spectra. Both are monthly beef-flavored chewables designed to cover fleas, ticks, heartworm, and intestinal worms in one dose. Review the product details and weight ranges carefully to confirm NexGard Spectra is the right fit for your dog before ordering.
Important Safety Information
NexGard Spectra is a widely used monthly parasite treatment, but there are important safety points to be aware of before use.
Suitable for:
- Dogs and puppies 8 weeks of age and older
- Dogs weighing at least 7.8 lbs (3.5 kg)
Isoxazoline class advisory:
Afoxolaner belongs to the isoxazoline class of parasiticides. This drug class has been associated with neurologic adverse reactions including tremors, ataxia, and seizures in some dogs, particularly those with a history of neurological conditions. These reactions are considered rare but important to be aware of. If your dog has a history of seizures or neurological issues, consult your veterinarian before use.
General caution:
- For use in dogs only — not for use in cats or other animals
- Always match the correct pack size to your dog's current body weight
- If adverse reactions occur after dosing, contact your veterinarian promptly
Frequently Asked Questions
What is NexGard Spectra used for?
NexGard Spectra is a monthly chewable tablet for dogs that protects against fleas, ticks, heartworm disease, roundworms, hookworms, and whipworms in one dose.
Is NexGard Spectra the same as NexGard Plus?
They are comparable products. NexGard Plus is the name used in the United States market. NexGard Spectra is the international product name. Both are monthly chewables providing broad-spectrum flea, tick, heartworm, and intestinal worm protection.
What active ingredients does NexGard Spectra contain?
NexGard Spectra contains Afoxolaner (isoxazoline class) and Milbemycin Oxime. These two ingredients together provide its broad parasite coverage.
Can puppies take NexGard Spectra?
Yes. NexGard Spectra is suitable for puppies 8 weeks of age and older, provided they meet the minimum weight requirement of 7.8 lbs (3.5 kg).
How often do I give NexGard Spectra?
Once monthly. Consistent monthly dosing is especially important for maintaining effective heartworm prevention.
What ticks does NexGard Spectra protect against?
NexGard Spectra provides protection against multiple tick species including the American dog tick, brown dog tick, lone star tick, and black-legged tick.
What if I miss a dose?
Give the missed dose as soon as you remember, then continue with your regular monthly schedule. Do not double dose.
Can I buy NexGard Spectra without a vet prescription?
At Smartway Pet Supplies, NexGard Spectra is available without a vet prescription. Customers are responsible for ensuring their order complies with local import regulations in their destination country.
How long does delivery take to the USA and Canada?
We offer fast delivery to both the USA and Canada. Orders over $99 qualify for FREE standard shipping. See our shipping & delivery page for full details.
100% Genuine NexGard Spectra — Sourced from Reputable Distributors
Every product at Smartway Pet Supplies is sourced directly from reputable wholesalers and sold in original manufacturer packaging. We stock only genuine, brand-name products — never counterfeit or grey-market goods.
Alongside NexGard Spectra, we carry other leading parasite prevention brands including:
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Simparica Trio — Monthly all-in-one chewable for dogs covering fleas, ticks, heartworm, and intestinal worms
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Bravecto — Long-lasting flea and tick chewable with up to 3 months protection per dose
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NexGard — Monthly flea and tick chewable
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HeartGard Plus — Monthly heartworm prevention for dogs
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