New Customers Only: Spend 49+ Get $20 eGift Card + Free Shipping with code: WELCOME
$21.48Chewy Price
List:
Tooltip Available
List Price is the suggested retail price from a manufacturer, supplier, or other retailer. It may not necessarily reflect an actual price offered on our site or elsewhere.
$31.98Chewy Price
Save
$10.50
(33%)
$20.41Autoship Price
Autoship (Save an extra 5%)
Why Autoship?
Save 5% on all future Autoship orders
Set your schedule based on your pet's needs
No fees, no commitments - skip, change or cancel anytime.
In Stock
FREE 1-3 day shipping over $49
About This Item
Details
Broad-spectrum, veterinarian-recommended treatment repels and kills fleas, ticks and mosquitoes on dogs 7 weeks or older and weighing 55 pounds or more.
Begins working within 12 hours and kills pests on contact.
Kills all life stages of fleas to prevent re-infestation; also kills lice and even repels biting flies.
Waterproof formula continues working for up to four weeks, even after bathing or swimming.
Convenient, monthly topical application contains imidacloprid, permethrin and pyriproxyfen; available in packs of 2, 4 or 6 treatments.
See More
Help protect your gentle giant from parasitic pests and the potentially harmful diseases they can transmit with K9 Advantix II Flea & Tick Treatment for Extra Large Dogs. This broad-spectrum, veterinarian-recommended treatment is specifically formulated to repel and kill fleas, ticks and mosquitoes on contact with no painful biting required. It further kills all life stages of fleas to prevent re-infestation, and even kills lice while also repelling biting flies. The waterproof formula for puppies and dogs 7 weeks or older and weighing 55 pounds or more continues working for up to four weeks, even after bathing or swimming.
Proudly sourced directly from the manufacturer. Guaranteed genuine and backed by the manufacturer.
Specifications
Item Number
75490
Usage
Treatment
Repels or Prevents
Fleas, Ticks, Mosquitoes
Kills or Treats
Fleas, Ticks, Mosquitoes
Lifestage
Adult
Breed Size
Large Breeds, Giant Breeds
Product Form
Solution
Health Condition
Fleas, Ticks, Mosquitoes
Precautions
USE ONLY ON DOGS AND PUPPIES 7 WEEKS OF AGE AND OLDER AND WEIGHING 55 LBS. OR MORE. DO NOT USE ON CATS. Do not get this product in dog's eyes or mouth. As with any product, consult your veterinarian before using this product on debilitated, aged, pregnant or nursing animals. Individual sensitivities, while rate, may occur after using ANY pesticide product on dogs. If signs persist, or become severe, consult a veterinarian immediately. If your animal is on medication, consult your veterinarian before using this or any other product. Keep out of reach of children.
Ingredients
Ingredients
Active Ingredients: Imidacloprid 8.80%, Permethrin 44.00%, Pyriproxyfen 0.44%.
Instructions
How to open:
Be sure tube is at bottom of pouch.
Using scissors, cut the pouch across the top and remove tube.
How to apply:
Use only on dogs.
Remove applicator tube from the package. Use scissors and peel down foil.
Hold applicator tube in an upright position. Pull cap off tube.
Turn the cap around and place other end of cap back on tube.
Twist cap to break seal, then remove cap from tube.
The dog should be standing for easy application. The entire contents of the K9 Advantix II tube should be applied evenly on the top of the back from the shoulder to the base of the tail. At each spot, part the hair until the skin is visible. Place the tip of the tube on the skin and gently squeeze to expel a portion of the solution on the skin. Do not apply an excessive amount of solution at any one spot that could cause some of the solution to run off the side of the dog.
Discard empty tube.
In cases of severe pest infestations, retreatment is allowable earlier than 4 weeks. Do not retreat more often than once every 7 days. After pest control is attained, return to a monthly retreatment schedule.
We source all our products from manufacturer approved distributors or directly from the manufacturers. Chewy takes pride in ensuring that our furry friends’ wellbeing is always our top priority. We have worked hard to partner with all of the manufactures to deliver 100% authentic products
How long after using another topical product do I need to wait before applying K9 Advantix II?
Please consult your dog’s veterinarian for their recommendation. Do not use K9 Advantix II on cats.
How long does K9 Advantix II last?
A single application of K9 Advantix II keeps working for a month. Do not use K9 Advantix II on cats.
Can I bathe my dog after applying K9 Advantix II?
Yes! However, we suggest bathing your dog before applying K9 Advantix II. Just make sure your dog is thoroughly towel dried. If you choose to bathe your dog in between treatments, we recommend use of a general grooming shampoo for pets. Do not use K9 Advantix II on cats.
Can I apply K9 Advantix II more than once a month?
A single application of K9 Advantix II remains effective for four weeks. However, if the dog has a severe infestation, retreatment within a month may be necessary. Do not retreat more than once every seven days not to exceed weekly treatments. After flea control is attained, return to a monthly treatment schedule. Do not use K9 Advantix II on cats.
Why do I still see fleas after using K9 Advantix II?
Although K9 Advantix II kills fleas on your dog, there may still be fleas in your dog's environment that have since jumped on after treatment. Luckily, with K9 Advantix II, new fleas are killed within 2 hours with protection against further infestation for at least 4 weeks. As fleas die they are no longer able to stay hidden against your dog's skin, and therefore you may also be seeing dying fleas coming to the surface of your dog's fur coat. Do not use K9 Advantix II on cats.
How long does it take for K9 Advantix II to work on fleas?
K9 Advantix II kills fleas within 12 hours. New fleas that jump on the dog from the surroundings, such as grass, carpet and pet bedding, are killed within 2 hours with protection against further infestation for at least 4 weeks. Do not use K9 Advantix II on cats.
Can my dog go swimming after using K9 Advantix II?
Yes! Your dog is free to take a dip after K9 Advantix II has been on for 24 hours. More frequent swimming may keep the product from working for the full 30 days. Do not use K9 Advantix II on cats.
How does K9 Advantix II work?
Not all products work the same way: K9 Advantix II is applied to the pet's skin, spreading the active ingredients over your dog's body to kill fleas, ticks and mosquitoes through contact. No biting required! Do not use K9 Advantix II on cats.
Learn More About K9 Advantix II From Our Team of Experts
Important Information
Fleas rise to the top of your pet's coat as they die, so consider it a triumph if you start seeing more fleas at first, after treating your pet. If you’re still seeing fleas after application, it may be because your pet has picked up new fleas from the environment, which may include other pets, surfaces and outdoor areas. It may take up to 30 days to break the entire flea life cycle. Additionally, you should also treat sources of new fleas (i.e., carpet, yard, etc.) to ensure complete flea control.
About K9 Advantix II
Experience the Advantages of K9 Advantix II
Veterinarian-recommended K9 Advantix II kills fleas, ticks, mosquitoes and lice, and repels biting flies. Now you can help your dog fight these pesky pests through contact—no biting required. Convenient and easy to use, K9 Advantix II is for dogs and puppies 7 weeks of age or older. So help your pal get the effective protection he needs with all of the advantages of K9 Advantix II.
Why are Biting Bugs a Big Deal?
K9 Advantix II spreads over the skin and hair to kill and repel them through contact, meaning they do not have to bite to die. And if a flea, tick or mosquito is repelled, it cannot bite and transmit disease.
Why Choose K9 Advantix II?
Fleas, ticks and mosquitoes can negatively affect your pet's health. It's important to use an effective product that kills pests which can spread disease. Fleas can cause flea allergy dermatitis, an allergic reaction that can lead to constant scratching, severe itching and even hair loss. Ticks can transmit deadly diseases, such as Lyme disease and Rocky Mountain spotted fever. And mosquitoes can potentially carry dangerous diseases, too, including heartworm. K9 Advantix II should not be used in place of a heartworm disease prevention product.
Is K9 Advantix II the Right Choice for Your Dog?
Whether your dog is a winter snow hound or a summer backyard explorer, an sunseeker or an outdoor enthusiast, choose K9 Advantix II to help keep fleas, ticks and mosquitoes from interrupting his favorite activities year-round. If you want to return the love to your dog, take care of him with flea prevention that works to kill the fleas you see and the ones you don't.
K9 Advantix II Has a Treatment for Dogs Large and Small
K9 ADVANTIX II FLEA & TICK TREATMENT FOR SMALL DOGS
4-10 pounds
K9 ADVANTIX II FLEA & TICK TREATMENT FOR MEDIUM DOGS
11-20 pounds
K9 ADVANTIX II FLEA & TICK TREATMENT FOR LARGE DOGS
21-55 pounds
K9 ADVANTIX II FLEA & TICK TREATMENT FOR EXTRA LARGE DOGS
55 pounds and over
Do not use K9 Advantix II on cats.
About K9 Advantix II
K9 Advantix II is manufactured by Bayer, a leading name in the healthcare industry for over 150 years. K9 Advantix II is a monthly flea, tick and mosquito treatment for your dog that kills through contact—no biting required. It starts working to kill fleas within 12 hours of application and is veterinarian recommended, so you can feel confident knowing that your pet is getting effective protection.
Will Advanix kill Heartworms as will as Flea's and Ticks
Answer by • Jun 02, 2021
This treatment is specifically formulated to repel and kill fleas, ticks and mosquitoes. It kills all life stages of fleas to prevent re-infestation and also kills lice and repels biting flies.
Can this product be used on pregnant dogs?
Answer by • May 21, 2018
K9 Advantix II is suitable for use with a pregnant or lactating dog.
Can I use both this along with the collar flea preventer?
Answer by • Aug 15, 2018
We encourage speaking with your Veterinarian before combining supplements, for the safest opinion.
Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 5 out of 5 stars
By onedef92 on Mar 12, 2023
Protect your pet with K9 Advantix II
Don't go with the budget brands, never found one that works half as well as this stuff. Ask your vet, if you get the dosage correct for some of this you can treat two small dogs using one large dog treatment (but ask your vet first!)
Rated 2 out of 5 stars
By StillaStruggle on Feb 27, 2023
No Good Results
I've had my dog on this for three months and have yet to see any good results. She's still being bit up by bugs outside I have two more doses left and don't think I should use them. Guess I should've thought twice before buying five...
Rated 5 out of 5 stars
By Rena on Mar 24, 2023
Economical and Effective
Provides protection for my pets at a reasonable price. I have been using it for years with no issues with fleas or ticks.
Rated 5 out of 5 stars
By oek9mom on Dec 29, 2022
So far, So good!
I'd always been a fan of the Seresto collars & had used them for years successfully but apparently something happened a couple of years ago & I've had two bad experiences with them. I'd used K9 Advantix previously & went back to it. So far, so good! Thank you!
Rated 5 out of 5 stars
By Rombo62 on Mar 5, 2023
Excellent Product
I've used this for my last dog and again on my current. It works as advertised and I prefer topical over a pill.
Rated 1 out of 5 stars
By LoriA on Mar 16, 2023
Made my dogs back all flaky
My dogs back is still flaky along the line where I administered the meds. And it's been 4 days.
Rated 1 out of 5 stars
By Cindy on Feb 13, 2023
Be Careful
Our dog had a reaction to this flea and tick medicine. Caused Skin irritation and made him itchy and irritable.
Rated 5 out of 5 stars
By Polly on Mar 26, 2023
Great Deal
Chewy always delivers my orders expediently. Good deal on flea/tick med.
Rated 5 out of 5 stars
By Roxiemom on Nov 18, 2022
Does just what it says
My first use greatly decreased the problem when dog was brand new to me. Repeated in three weeks and then monthly as indicated. I haven't had any problems with fleas, ticks, mosquitos. No skin allergies either. My backyard is within 30 feet of deep drainage creek too.
Rated 5 out of 5 stars
By TSquared13 on Feb 4, 2023
TOTALLY OFF LIMITS
Best flea, tick AND mosquito defense available on the market. The application is easy to apply and works!