NexGard Chewables for Dogs

NexGard delivers monthly protection against fleas and ticks in a single beef-flavored chew, sized to your dog's exact weight. The active ingredient, afoxolaner, is absorbed into the bloodstream and starts killing fleas within hours, with coverage against multiple tick species lasting a full 30 days per dose.

Shop NexGard by Weight

• Extra Small Dogs (Orange) 4–10 lbs
• Small Dogs (Blue) 10.1–24 lbs
• Medium Dogs (Green) 24.1–60 lbs
• Large Dogs (Red) 60.1–121 lbs

Always dose to your dog's current body weight — never split or share chews across sizes. If your dog sits near the edge of a weight range, check our NexGard size guide before ordering.

How NexGard Works

Afoxolaner belongs to the isoxazoline class of parasiticides. Once a dog swallows the chew, the active ingredient is absorbed into the bloodstream rather than sitting on the coat. When a flea or tick bites and feeds, it ingests afoxolaner, which disrupts nervous system signalling in the parasite and kills it — typically within hours for fleas. Because protection works from inside the body, it isn't washed off by swimming, bathing, or rain the way some topical treatments can be.

NexGard vs NexGard Spectra — Which One Do You Need?

NexGard (this range) covers fleas and ticks only. If your dog also needs protection against heartworm and intestinal worms, NexGard Spectra combines flea, tick, heartworm, and worm coverage in one monthly chew. Both use a similar chewable format and monthly dosing schedule — the choice generally comes down to whether your dog needs flea/tick coverage alone or the broader all-in-one protection.

Who NexGard Is For

NexGard is suitable for puppies and adult dogs from 8 weeks of age, matched to the correct weight range. Dogs with a history of seizures should only use NexGard under veterinary guidance, since isoxazoline-class products have been associated with neurological side effects in a small number of dogs with pre-existing conditions.

Possible Side Effects

NexGard is well tolerated by most dogs. Mild, short-lived side effects can include vomiting, diarrhea, itching, lethargy, or reduced appetite. Contact your veterinarian if any symptoms persist or you have concerns about your dog's reaction.

No Vet Prescription Required

NexGard is available over the counter through Smartway Pet Supplies — no prescription or vet authorization needed at checkout. It's the same product, same active ingredient, and same dosage your vet would sell, sourced as genuine Australian stock from Boehringer Ingelheim.

Fast Shipping to the US and Canada

Orders ship directly from Australia to the US and Canada, with free standard shipping on qualifying orders over $125.

Frequently Asked Questions

How is NexGard different from a flea collar?
A collar releases treatment continuously onto the coat and can be dislodged, chewed, or lost. NexGard works systemically from a single monthly dose, so there's no collar to fit, remove for bathing, or replace.

Can I give NexGard alongside other medications?
NexGard is commonly used alongside heartworm and worming treatments, but always check with your vet before combining any medications, especially if your dog is on existing treatment for a health condition.

What happens if I miss a monthly dose?
Give the chew as soon as you remember, then resume your regular monthly schedule from that date. A missed or delayed dose can leave a gap in protection, particularly in tick-active seasons.