K9 Advantix II Monthly Flea & Tick Prevention for Medium Dogs 11-20 lbs, 2-Monthly Treatments
K9 Advantix II Monthly Flea & Tick Prevention for Medium Dogs 11-20 lbs, 2-Monthly Treatments
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K9 Advantix II

K9 Advantix II Monthly Flea & Tick Prevention for Medium Dogs 11-20 lbs, 2-Monthly Treatments

|7,856 ratings
K9 Advantix II Monthly Flea & Tick Prevention for Medium Dogs 11-20 lbs, 2-Monthly TreatmentsK9 Advantix II Monthly Flea Tick Prevention for Medium Dogs 11 20 lbs 2 Monthly TreatmentsK9 Advantix II Monthly Flea Tick Prevention for Medium Dogs 11 20 lbs 1 Monthly TreatmentK9 Advantix II Monthly Flea Tick Prevention for Medium Dogs 11 20 lbs 4 Monthly Treatment
Count Per Pack2

Key item features

  • K9 Advantix II Medium Dog 30-day treatment & prevention protects dogs 11-20 lbs. from fleas, ticks, mosquitoes, biting flies and lice
  • Kills fleas within 12 hours of application
  • Vet-recommended formula kills & repels on contact so fleas don’t have to bite your dog to die
  • Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours
  • No prescription needed

Specs

Brand, K9 Advantix IIAnimal type, DogWeight range, 11-20 lbPet size, MediumMinimum weight, 11 lbMax Weight, 21 lb

About this item

Product details

K9 Advantix II helps defend your dog against fleas, ticks, mosquitoes, biting flies, and lice. Simpler than a flea collar and troublesome pills, this vet-recommended topical formula works within 12 hours of initial application, killing adult fleas on contact to stop existing flea infestations and prevent new ones. Once K9 Advantix II is applied, your dog is ready to get right back to the things it loves most. K9 Advantix II pest protection is effective on both indoor and outdoor dogs. Your dog should be at least 7 weeks old and weigh 11-20 lbs. to use K9 Advantix II Medium Dog.
  • K9 Advantix II Medium Dog 30-day treatment & prevention protects dogs 11-20 lbs. from fleas, ticks, mosquitoes, biting flies and lice
  • Kills fleas within 12 hours of application
  • Vet-recommended formula kills & repels on contact so fleas don’t have to bite your dog to die
  • Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours
  • No prescription needed
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.  

Specifications

Brand

K9 Advantix II

Animal type

Dog

Weight range

11-20 lb

Pet size

Medium

Indications

Directions

Dosage

Monthly Topical

Instructions

Follow instructions on package

Warranty

Warranty information

N/A

Ingredients

Warnings

Customer ratings & reviews

4.3 out of 5 stars
stars
7,856 ratings2,368 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars71% (5,604)
  2. 4 stars12% (905)
  3. 3 stars6% (460)
  4. 2 stars3% (219)
  5. 1 star9% (668)
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
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Showing 1-3 of 2,368 reviews

Oct 30, 2026
Reviewer name: xena
Top Reviewer
Item details
Count per pack: 4
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

RID OF FLEAS FAST

WORKS GREAT! MY DOGS HAD FLEAS AND THEY WERE GONE WITHIN 2 DAYS OF APPLICATION

Helpful?6f02d540-bb15-11f1-8643-3dea92e18e9a43436804
Nov 2, 2026
Reviewer name: Louanna
Top Reviewer
Item details
Multipack quantity: 1
Count per pack: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

My veterinarian recommended this for my pug. I have been very pleased with it. I have not seen any fleas on my dog or in my house.

Helpful?6f02d540-bb15-11f1-8643-3dea92e18e9a43436804
Oct 30, 2026
Reviewer name: Fay
Top Reviewer
Item details
Count per pack: 2
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

My dog has seizures and this is the only tick %26 flea prevention I use. It was recommended by my vet.

Helpful?6f02d540-bb15-11f1-8643-3dea92e18e9a43436804
Current price is $35.68$17.84/count
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