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Elanco K9 Advantix Flea Tick & Mosquito Prevention for Dogs
K9 Advantix

Elanco K9 Advantix Flea Tick & Mosquito Prevention for Dogs

3.9· 2,800 ratings

Best price now

$14.98at Chewy.comObserved at 5:33 AM

Compared across 3 stores. Prices are checked against each store and labelled with when.

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Our take on the Elanco K9 Advantix Flea Tick & Mosquito Prevention for Dogs

K9 Advantix is a monthly topical that kills fleas, ticks and mosquitoes on dogs. It pairs imidacloprid with permethrin and is waterproof after 24 hours. This box holds two tubes for dogs 11-20 lbs, so it covers two months. At $14.98 at Chewy.com as of November 4, 2026, it is a low entry price for a two-month supply, though the per-dose cost depends on the size you buy.

Best forDogs 11-20 lbs with flea, tick and mosquito exposureOwners who want a no-prescription topicalMulti-dog homes treating each dog monthlyPeople who prefer a fragrance-free formula
Pros
  • Kills fleas, ticks and mosquitoes in one product
  • No prescription needed
  • Waterproof after 24 hours
  • Fragrance-free
  • Two tubes cover two months
Cons
  • Toxic to cats; keep treated dogs away from them
  • Weight-banded dosing means you must match the right box
  • Monthly reapplication needed
  • Permethrin can irritate sensitive skin

Elanco K9 Advantix Flea Tick & Mosquito Prevention for Dogs prices at every store

  • WalmartNew

    In stock

    $14.98Observed at 5:33 AM
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  • Chewy.comNew

    In stock

    $14.98Observed at 5:33 AM
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  • eBayNew

    Availability unknown

    $17.00Observed at 5:33 AM
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Also available at

  • bomgaars.comCheck price at bomgaars.com
  • KwikPets.comCheck price at KwikPets.com
  • Petco.comCheck price at Petco.com
  • PetSmartCheck price at PetSmart
  • Pet Supplies PlusCheck price at Pet Supplies Plus

Elanco K9 Advantix Flea Tick & Mosquito Prevention for Dogs price history

Lowest price we've seen: $14.98 on Nov 4 at Walmart. Tracked across 8 stores since Nov 4.

What reviewers say

Ratings sit around 3.9 out of 5 across about 2,800 reviews. Many owners report it works well against fleas and mosquitoes, while others cite skin reactions, greasy residue or fleas returning late in the month.

Pros
  • Clears fleas and mosquitoes quickly
  • Easy to apply between the shoulder blades
  • No strong smell
Cons
  • Skin irritation or redness at the application site
  • Greasy or slow-drying spot
  • Some report fleas returning before the month ends

Specifications

Targeted Pests
Fleas, Mosquitoes, Ticks
Active Ingredient
Permethrin, Imidacloprid
Administration Method
Topical treatment
Life Stage Age
Adult
Treatment Frequency
Monthly
Animal Type
Dogs
Dosage Concentration
8.80% (imidacloprid)
Dosage Duration
30-day
Formulation Type
Topical Solution
Formulation
Waterproof (after 24 hours)
Lifecycle Targeted
Adult fleas (before they lay new eggs)
Treatment Type
Prevention, Treatment
Supply Duration
2 months
Supply Amount
2 Count Tubes
Weight Range
11-20 lbs
Breed Restrictions
Do not use on cats
Contains
Permethrin, Imidacloprid, Other ingredients
Free Of
Fragrance
Package Type
Box
Scent
Fragrance-free

Questions and answers

Is K9 Advantix safe for cats?
No. It contains permethrin, which is toxic to cats. Do not use it on cats and keep treated dogs separate from cats until the product dries.
How often do I apply it?
Once a month. Each tube treats one dog for about 30 days, and this box has two tubes.
Which weight range does this box fit?
Dogs 11-20 lbs. K9 Advantix comes in separate weight bands, so check your dog's weight before buying.
Can I bathe my dog after applying it?
Yes, after 24 hours. The formula is waterproof once dry, but shampooing within the first day can reduce protection.
Is it cheaper than a prescription flea product?
Often yes. At $14.98 at Chewy.com as of November 4, 2026 for two doses, it undercuts many vet-channel options, though coverage and pest range differ.
Does it treat an existing flea infestation?
It kills adult fleas before they lay eggs, but homes with an active infestation also need cleaning and possibly an environmental treatment.
Where is the Elanco K9 Advantix Flea Tick & Mosquito Prevention for Dogs cheapest?
At Chewy.com, for $14.98, as of our latest check.
What do buyers say about the Elanco K9 Advantix Flea Tick & Mosquito Prevention for Dogs?
Rated 3.9 out of 5 from 2,800 ratings.
Where can I buy the Elanco K9 Advantix Flea Tick & Mosquito Prevention for Dogs?
8 stores we checked sell it, including Walmart, Chewy.com, eBay, bomgaars.com, KwikPets.com.

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