K9 Advantix II Flea and Tick Prevention for Dogs
4.5Best price now
$19.97at WalmartObserved at 5:11 AM
45% under what the other stores charge
Compared across 4 stores. Prices are checked against each store and labelled with when.
45% under what the other stores charge
Compared across 4 stores. Prices are checked against each store and labelled with when.
K9 Advantix II is a monthly spot-on treatment for dogs that kills and repels fleas, ticks and mosquitoes, and also controls biting flies and chewing lice. It combines imidacloprid, permethrin and pyriproxyfen, kills fleas within 12 hours, and becomes waterproof 24 hours after application. The 4-tube pack for dogs 21-55 lbs is $19.97 at Walmart as of November 4, 2026, the lowest of the four stores listing it new.
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Lowest price we've seen: $19.97 on Nov 4 at Walmart. Tracked across 7 stores since Nov 4.
Owners rate it 4.5 out of 5 across 136 ratings, with most reporting fewer fleas and ticks and easy application. Complaints center on the smell of the liquid going on and on skin reactions in a minority of dogs.
K9 Advantix II for Dogs
K9 Advantix® II is a monthly topical treatment that kills and repels fleas, ticks, and mosquitoes while also controlling biting flies and chewing lice. Its three active ingredients—imidacloprid, permethrin, and pyriproxyfen—work together to kill existing fleas, help prevent flea reinfestation, and provide protection against multiple external parasites.
This easy-to-apply, fragrance-free formula kills fleas on dogs within 12 hours of initial application and kills newly arriving fleas within 2 hours. It remains effective for up to four weeks and becomes waterproof after 24 hours when used as directed.
Features:
Broad-spectrum pest control: Kills and repels fleas, ticks, and mosquitoes; also controls biting flies and chewing lice.
Fast flea control: Kills existing fleas within 12 hours and newly arriving fleas within 2 hours.
Flea life-cycle control: Pyriproxyfen helps prevent flea development for up to four weeks.
Monthly protection: Provides up to four weeks of protection per application.
Convenient topical formula: Easy-to-apply, fragrance-free treatment with no pills required.
Waterproof: Becomes waterproof after 24 hours when used as directed.
• No prescription required.
Active Ingredients:
• Imidacloprid 8.80%
• Permethrin 44.00%
• Pyriproxyfen 0.44%
Directions:
Apply the contents of one weight-appropriate tube topically as directed on the product label. Use only on dogs and puppies at least 7 weeks old and weighing 4 lb or more.
For best results, avoid bathing your dog for 48 hours before and after application. Swimming or frequent bathing may reduce the duration of protection. Follow the package instructions for application sites and retreatment intervals.
Cautions/Warnings:
For dogs only. Do not use on cats. Keep treated dogs away from cats until the application site is completely dry, and follow all label precautions to prevent cat exposure. Do not allow the product to contact the dog's eyes or mouth. Keep out of reach of children.
Monitor your dog after application. Possible adverse reactions include skin redness, scratching, discomfort, vomiting, or diarrhea. If signs persist or become severe, contact a veterinarian. Consult your veterinarian before use on debilitated, elderly, pregnant, or nursing dogs, or if your dog is taking medication. Individual sensitivities to pesticide products may occur.
Available Sizes:
Dog Weight
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