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

8,916 ratings
K9 Advantix Flea, Tick & Mosquito Prevention for Medium Dogs 11-20 lbs., 2-Monthly TreatmentsK9 Advantix Flea Tick Mosquito Prevention for Medium Dogs 11 20 lbs 2 Monthly Treatments2 pack K9 Advantix Flea Tick Mosquito Prevention for Extra Large Dogs Over 55 lbs 2 Monthly Treatments3 pack K9 Advantix Flea Tick Mosquito Prevention for Medium Dogs 11 20 lbs 2 Monthly Treatments2 pack K9 Advantix Flea Tick Mosquito Prevention for Small Dogs 4 10 lbs 2 Monthly Treatments4 pack K9 Advantix Flea Tick Mosquito Prevention for Medium Dogs 11 20 lbs 2 Monthly Treatments4 pack K9 Advantix Flea Tick Mosquito Prevention for Small Dogs 4 10 lbs 2 Monthly Treatments3 pack K9 Advantix Flea Tick Mosquito Prevention for Large Dogs 21 55 lbs 2 Monthly Treatments4 pack K9 Advantix Flea Tick Mosquito Prevention for Extra Large Dogs Over 55 lbs 2 Monthly Treatments3 pack K9 Advantix Flea Tick Mosquito Prevention Treatment Small Dogs 4 10 lbs 2 Count4 pack K9 Advantix Flea Tick Mosquito Prevention for Large Dogs 21 55 lbs 2 Monthly TreatmentsK9 Advantix Flea Tick Mosquito Prevention for Extra Large Dogs Over 55 lbs 2 Monthly Treatments2 pack K9 Advantix Flea Tick Mosquito Prevention for Medium Dogs 11 20 lbs 2 Monthly TreatmentsK9 Advantix Flea Tick Mosquito Prevention for Small Dogs 4 10 lbs 2 Monthly Treatments3 pack K9 Advantix Flea Tick Mosquito Prevention for Extra Large Dogs Over 55 lbs 2 Monthly TreatmentsK9 Advantix Flea Tick Mosquito Prevention for Large Dogs 21 55 lbs 2 Monthly Treatments2 pack K9 Advantix Flea Tick Mosquito Prevention for Large Dogs 21 55 lbs 2 Monthly Treatments
Multipack Quantity1
Pet SizeMedium

Key item features

  • An excellent value from the K9 Advantix brand
  • K9 Advantix Medium Dog 30-day treatment & prevention protects dogs 11-20 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

Specs

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

About this item

Product details

K9 Advantix kills and repels fleas, ticks, mosquitoes, biting flies, and lice. Simpler than a flea collar and hard-to-swallow pills, this topical formula works within 12 hours of initial application to stop existing flea infestations on dogs and prevent new ones by killing adult fleas on contact before they lay new eggs or bite your dog. K9 Advantix offers fast relief at an excellent value, so you and your dog can get back to the things you love most. Your dog should be at least 7 weeks old and weigh 11-20 lbs. to use K9 Advantix Medium Dog. Use as directed by label. Do not use on cats.
  • An excellent value from the K9 Advantix brand
  • K9 Advantix Medium Dog 30-day treatment & prevention protects dogs 11-20 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
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 lb - 20 lb

Pet size

Medium

Indications

Directions

Dosage

1 Tube

Instructions

Follow instructions on package

Ingredients

Warnings

Customer ratings & reviews

4.3 out of 5 stars
stars
8,916 ratings2,188 reviews
Includes global ratings and reviews
How item rating is calculated

Reviews summary

Pros

  • : Application process is fast and requires minimal effort.
  • : The topical repels and kills biting insects on dogs.
  • : Offers good cost-to-benefit ratio.
  • : Reduces scratching and itching in dogs.
  • : Prevents and kills fleas and ticks.
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Showing 1-3 of 2,188 reviews

Oct 22, 2026
Reviewer name: Tabatha
Top Reviewer
Item details
Multipack quantity: 1
Pet size: Extra Large
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

works great!!!

i buy this brand every year it works great on my pittie, and my pit/ catahoula is easy to apply and no runoff or irritation, which is great because my boys ha e sensative skin.

Helpful?2AOU0QP68G3R2925998668
Jun 20, 2026
Reviewer name: anonymous
Top Reviewer
Item details
Multipack quantity: 1
Pet size: Small
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Flea And Tick Medication

I Have Used This K-9 Advantix On My Fur Babies Since Last Year. I Know That It Keeps The Ticks And Fleas Off My Babies. And I Am So Thankful For That. I Know That If They Get Fleas On Them They Are So Miserable. And I Don't Want My Babies To Be In Any Kind Of Misery. So If You Have Never Tried This Monthly Flea And Tick Medication Give It A Try. ( Just Remember If You Have A Cat Fur Baby Do Not Let Them Near Each Other For A Day Or Two. I Read This On The Package Directions , And I Let My Mom Keep My Cat For A Couple Days.

Helpful?2AOU0QP68G3R2925998668
Aug 25, 2026
Reviewer name: DioneJ
5 out of 5 stars
5 out of 5 stars review

My go-to treatment for my dog!

I will always use K9 Advantix on my dogs. I found that it's the most effective way to help treat and prevent ticks, mosquitoes, fleas, and biting flies, which is an absolute must when you live in Florida. It is so easy to use. Once a month, I give my dog a bath and once she's all dry, I apply it along her back and you're done!

Review from influenster.com
Helpful?2AOU0QP68G3R2925998668
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