NexGard Chewables for Dogs

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NexGard Chewables for Dogs Without Vet Prescription. 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. If you have a cat rather than a dog, the equivalent all-in-one option is NexGard Spectra for Cats . For a deeper side-by-side breakdown, including differences for U.S. and Canadian buyers, see our full comparison guide . Who NexGard Is For NexGard is suitable for puppies and adult dogs from 8 weeks of age, matched to the correct weight range. Dogs wi