(3 pack) K9 Advantix Flea, Tick & Mosquito Prevention for Large Dogs 21-55 lbs., 2-Monthly Treatments
(3 pack) K9 Advantix Flea, Tick & Mosquito Prevention for Large Dogs 21-55 lbs., 2-Monthly Treatments
Hero image 0 of (3 pack) K9 Advantix Flea, Tick & Mosquito Prevention for Large Dogs 21-55 lbs., 2-Monthly Treatments, 0 of 10
Best seller

(3 pack) K9 Advantix Flea, Tick & Mosquito Prevention for Large Dogs 21-55 lbs., 2-Monthly Treatments

4.3 stars out of 5560 reviews
(4.3)|
5,560 ratings

Key item features

  • An excellent value from the K9 Advantix brand
  • K9 Advantix Large Dog 30-day treatment & prevention protects dogs 21-55 lbs. from fleas, ticks, mosquitoes, biting flies and lice
  • Affordable formula works on contact to kill and repel fleas on dogs within 12 hours of application even without a bite
  • Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours
  • No prescription needed
Current price is $44.94$7.49/count
Price when purchased online
  • Free shipping
  • Free 90-day returns

How do you want your item?

Try 30 days of Free Shipping with Walmart+! Choose plan at checkout.
How do you want your item?
Columbus, 43215
Arrives by Today
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible

This item includes:

  • 3-pack of K9 Advantix Flea, Tick & Mosquito Prevention for Large Dogs 21-55 lbs., 2-Monthly Treatments
walmart plus

Get free delivery, shipping and more*

*Restrictions apply
Try Walmart+ now

About this item

Product details

Specifications

Indications

Directions

Ingredients

Warnings

Customer ratings & reviews

4.3 out of 5 stars
stars5,560 ratings1,803 reviews
How item rating is calculated

Reviews summary

Pros
  • : Application process is simple and fast.
  • : Provides long-lasting defense against multiple insects.
  • : Offers good value at this price point.
  • : Reduces scratching in dogs after application.
  • : Has little to no noticeable odor.
Generated by AI

Customer images

  • +186 images
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 1,803 reviews

May 19, 2025
anonymous
Top Reviewer
Item details
Multipack quantity: 1
Pet size: Large
5 out of 5 stars review

Verified Purchase

Tried %26 True

I prefer an oral flea treatment as I don't want pesticide in my own bloodstream from the topical getting on everything the dog lays on (%26 then I touch). But I have 1 dog that can't take oral treatment. So I've used Advantix for 12yrs. I do bathe him exactly 24hrs after application to avoid it transferring around my home.

Helpful?2AOU0QP68G3R15346561416
Jul 14, 2025
WalmartCustomer
Item details
Multipack quantity: 1
Pet size: Extra Large
5 out of 5 stars review

Verified Purchase

I have used this product for a couple years now. It has always been effective at preventing and treating fleas and ticks. I'm not *********% sure about the biting flies, but my three year old Catahoula bulldog is an indoor dog and only goes outside to go potty or about three times a week to socialize with other dogs at a leashless dog park nearby. I haven't noticed any biting flies swarming him at least. I have used other flea/tick treatment, that one from Walmart as well, costing $5-$6 for a three month supply, and discovered that brand wasn't as effective after seeing a tick on my dog and increased scratching four days after applying that flea/tick treatment/prevention. I was wanting to test it's efficacy based on the very cheap price and won't use it again. Lesson learned. The price of this flea and tick treatment is very affordable, and it truly works. I have used it long enough to know it works. If anything, give it a try and see for yourself.

Incentivized Review
Helpful?2AOU0QP68G3R15346561416
Aug 8, 2025
WalmartCustomer
Item details
Multipack quantity: 1
Pet size: Large
5 out of 5 stars review

Verified Purchase

This is the only product that works for fleas and I love that it is more affordable and also offered in smaller packs as I have 4 different size dogs. I understand having to have this stuff locked up in the store but it is quite inconvenient to have to find/wait for an employee to come unlock the area in the store so I'm glad I can have it delivered and still get it same day without the hassle. I understand theft is a big problem but I do often get tired of being inconvenienced due to other people's behaviors. (In relation to the items being locked up)

Incentivized Review
Helpful?2AOU0QP68G3R15346561416

Frequently bought together

(3 pack) K9 Advantix Flea, Tick & Mosquito Prevention for Large Dogs 21-55 lbs., 2-Monthly Treatments $44.94 $7.49/count

(3 pack) K9 Advantix Flea, Tick & Mosquito Prevention for Large Dogs 21-55 lbs., 2-Monthly Treatments
current price $44.94
$7.49/count

(3 pack) K9 Advantix Flea, Tick & Mosquito Prevention for Large Dogs 21-55 lbs., 2-Monthly Treatments

4.3 out of 5 Stars. 5560 reviews

Best seller ADAMS Flea & Tick Cleansing Shampoo For Dogs, Cats, 12 Fluid Ounces $11.48 95.7 ¢/fl oz

Best seller
ADAMS Flea & Tick Cleansing Shampoo For Dogs, Cats, 12 Fluid Ounces
current price $11.48
95.7 ¢/fl oz

ADAMS Flea & Tick Cleansing Shampoo For Dogs, Cats, 12 Fluid Ounces

4.5 out of 5 Stars. 1159 reviews

Hartz UltraGuard Pro Reflective Flea & Tick Collar for Dogs and Puppies, 7 Months Protection, 1ct $7.92

Hartz UltraGuard Pro Reflective Flea & Tick Collar for Dogs and Puppies, 7 Months Protection, 1ct
current price $7.92

Hartz UltraGuard Pro Reflective Flea & Tick Collar for Dogs and Puppies, 7 Months Protection, 1ct

4 out of 5 Stars. 1943 reviews

Best seller Vibrant Life Large Dog Flea Comb $4.93

Best seller
Vibrant Life Large Dog Flea Comb
current price $4.93

Vibrant Life Large Dog Flea Comb

4.2 out of 5 Stars. 408 reviews
Current price is $69.27
Items may be delivered on different dates