---
product_id: 5749537
title: "K9 Advantix II Flea Control for Dogs 21-55 Pounds (6 Applications)"
brand: "bayer"
price: "R33"
currency: ZAR
in_stock: false
reviews_count: 8
url: https://www.desertcart.co.za/products/5749537-k9-advantix-ii-flea-control-for-dogs-21-55-pounds
store_origin: ZA
region: South Africa
---

# Water-resistant formula 6 monthly applications included Kills fleas in 12 hours K9 Advantix II Flea Control for Dogs 21-55 Pounds (6 Applications)

**Brand:** bayer
**Price:** R33
**Availability:** ❌ Out of Stock

## Summary

> 🐾 Stay ahead of pests, keep your dog unstoppable!

## Quick Answers

- **What is this?** K9 Advantix II Flea Control for Dogs 21-55 Pounds (6 Applications) by bayer
- **How much does it cost?** R33 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/5749537-k9-advantix-ii-flea-control-for-dogs-21-55-pounds)

## Best For

- bayer enthusiasts

## Why This Product

- Trusted bayer brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Vet-Trusted & Safe:** EPA-approved, safe for dogs 7 weeks and older weighing 21-55 lbs—no prescription needed.
- • **Rapid Flea Eradication:** Eliminates 98-100% of fleas within 12 hours—fast relief for your active dog.
- • **Long-Lasting Protection:** 6 monthly doses provide half a year of continuous defense against pests.
- • **Water-Resistant Formula:** Keeps working through baths and rainy days—no interruptions in protection.
- • **Broad-Spectrum Pest Control:** Repels and kills ticks and mosquitoes, guarding against Lyme and West Nile viruses.

## Overview

K9 Advantix II is a vet-recommended topical flea and tick treatment designed for dogs weighing 21-55 pounds. Each pack includes 6 water-resistant monthly applications that kill 98-100% of fleas within 12 hours and repel ticks and mosquitoes, providing up to 6 months of continuous protection. Safe for puppies 7 weeks and older, this EPA-approved formula helps prevent flea allergy dermatitis and vector-borne diseases like Lyme and West Nile virus, ensuring your dog stays healthy and itch-free.

## Description

K9 Advantix Red kills 98100 of fleas on dogs within 12 hours and continues protection at least 4 weeks. Repels and kills a majority of ticks and mosquitoes. This is the ultimate protection for your dog Each packet contains 6 applications providing 6 months of protection. Protect your pet today. Effective Flea Tick Control . . . No Prescription RequiredGuaranteed US EPA approved. Each package of K9 Advantix for Dogs lasts 4 to 6 months (One vial per month) Kills 98100 of fleas within 12 hours helpful in dogs with Flea Allergy Dermatitis Protects against deadly Lyme Disease, spread by ticks Repels and kills mosquitos, carriers of dangerous West Nile Virus Waterresistant, easy to apply formula stays on in baths or in the rain CLICK HERE for additional information on K9Advantix.

Review: works for my "herd" - I have six (yes 6) dogs and 2 cats... The dogs are indoor-outdoor kids...you know, if they are in they want out and if they are out they want in! We live outside of the city limits and have our share of wildlife - fox, raccoons, possum etc. along with all the neighbors who let their dogs run loose. I do what I can to keep the yard sprayed - but it becomes a loosing battle by the mid-summer to late fall. This product keeps the fleas off the dogs and makes such a difference during those periods when our Mississippi weather promotes the mad hatching of fleas. I have tried other products in the past - nothing works like K9 Advantix for our household. We have a place in the "hills" we visit from time to time - notorious for ticks - we have yet to have any ticks return with us from these trips! Our six "kids" fall into three different weight categories - two are right on the upper end of the cut off - with those I use the next dose up. They range in size from an 85 pound German Shepherd to an 18 pound Poodle mix. None of my pups have every had a skin or nervous system reaction to this product. No problems and no complaints.
Review: Worked When Nothing Else Would - We mixed up some all-natural stuff...killed one or two, but not all of the fleas. We bought some all-natural stuff. We bathed them in vinegar+dish soap. We bathed them again in Insect Guard Shampoo. Still spotted fleas when we looked through the fur. This stuff knocked them all off overnight. No more scratching waking us up at 4am, no more worrying about a flea infestation, either. I really, truly wanted to avoid putting something on my dogs that I wouldn't put on myself, but they were miserable and all the natural stuff we tried just wasn't saving them from the fleas. It's been a few days, and they seem much happier and more relaxed. To be fair, the natural stuff did kill the fleas as well, but not as effectively. We laid our puppies out on the floor and went through them with a comb, spraying a natural oil mixture on any flea we spotted. They died instantly, but this was after following the directions on the bottle, dampening all the fur and rubbing the stuff to the roots. Spent hours working through fur and killing fleas and still we didn't get them all.

## Features

- Once a month topical flea treatment for dogs
- Kills 98 to 100 percent of fleas within 12 hours
- Safe for dogs 7 weeks and older and weighing 21 55 pounds
- Water resistant; includes 6 applications for 6 months of protection
- Please read all label information on delivery

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Age Range (Description) | Large dogs 21-55 |
| Brand | Bayer |
| Customer Reviews | 4.3 out of 5 stars 411 Reviews |
| Item Form | Drops |
| Item Volume | 9 Milliliters |
| Item Weight | 0.13 Pounds |
| UPC | 024089616341 724089616340 724089353108 |

## Product Details

- **Age Range (Description):** Large dogs 21-55
- **Brand:** Bayer
- **Item Form:** Drops
- **Item Volume:** 9 Milliliters
- **Item Weight:** 0.13 Pounds
- **UPC:** 024089616341 724089616340 724089353108

## Images

![K9 Advantix II Flea Control for Dogs 21-55 Pounds (6 Applications) - Image 1](https://m.media-amazon.com/images/I/71k2TZcS71L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ works for my "herd"
*by P***M on August 23, 2010*

I have six (yes 6) dogs and 2 cats... The dogs are indoor-outdoor kids...you know, if they are in they want out and if they are out they want in! We live outside of the city limits and have our share of wildlife - fox, raccoons, possum etc. along with all the neighbors who let their dogs run loose. I do what I can to keep the yard sprayed - but it becomes a loosing battle by the mid-summer to late fall. This product keeps the fleas off the dogs and makes such a difference during those periods when our Mississippi weather promotes the mad hatching of fleas. I have tried other products in the past - nothing works like K9 Advantix for our household. We have a place in the "hills" we visit from time to time - notorious for ticks - we have yet to have any ticks return with us from these trips! Our six "kids" fall into three different weight categories - two are right on the upper end of the cut off - with those I use the next dose up. They range in size from an 85 pound German Shepherd to an 18 pound Poodle mix. None of my pups have every had a skin or nervous system reaction to this product. No problems and no complaints.

### ⭐⭐⭐⭐⭐ Worked When Nothing Else Would
*by J***I on June 26, 2016*

We mixed up some all-natural stuff...killed one or two, but not all of the fleas. We bought some all-natural stuff. We bathed them in vinegar+dish soap. We bathed them again in Insect Guard Shampoo. Still spotted fleas when we looked through the fur. This stuff knocked them all off overnight. No more scratching waking us up at 4am, no more worrying about a flea infestation, either. I really, truly wanted to avoid putting something on my dogs that I wouldn't put on myself, but they were miserable and all the natural stuff we tried just wasn't saving them from the fleas. It's been a few days, and they seem much happier and more relaxed. To be fair, the natural stuff did kill the fleas as well, but not as effectively. We laid our puppies out on the floor and went through them with a comb, spraying a natural oil mixture on any flea we spotted. They died instantly, but this was after following the directions on the bottle, dampening all the fur and rubbing the stuff to the roots. Spent hours working through fur and killing fleas and still we didn't get them all.

### ⭐⭐⭐⭐ Switched from Frontline
*by S***S on March 20, 2011*

After having used Frontline for over 8 years, we switched to K9 Advantix in order to save money. We have 2 dogs (24 and 53 pounds) both using the 21-55 pound dose. Frontline offers a narrower dosing weight, therefore we had to purchase 2 different Frontline products. Purchasing one dose range of K9 Advantix in bulk will save us money. We were happy with Frontline, so this review will compare K9 Advantix to Frontline. Again we only made the switch to save money. Amazon by far is the best source for Frontline and Advantix. I have been unable to beat the price offered here. Likes: -Packaging: Much simpler to open then Frontline. -Tube of medication: Again much better than Frontline. Easy to pierce, no mess or dripping. -Flea and tick control: Seems to work just as well as Frontline did. -Skin reaction: Neither of our dogs had any irritation, itching, redness, etc from K9 Advantix. -Price: Did I mention I am saving a little money by switching? Dislikes: -Application: Must be dosed on 4 spots along spine. Much messier. Dog looks greasier for 2 days than with Frontline. Overall the switch has been fine for our dogs.

## Frequently Bought Together

- K9 Advantix II Flea Control for Dogs 21-55 Pounds (6 Applications)
- K9 Advantix II XL Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs Over 55 lbs. | 6-Mo Supply
- K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 6-Mo Supply

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-28*