• 4 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)

4 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)

SKU: 5458498
Regular Price: $70.99Sale Price: $49.95
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K9 Advantix II TEAL for Medium Dogs 11-20 lbs

Keep your dog safe from irritating and dangerous pests with k9 Advantix for dogs 11-20 Lbs. Formulated for dogs seven weeks of age and older and weighing 11-20 pounds and under, K9 Advantix II outperforms its competitors not only by killing more varieties of pests, but also by repelling them to prevent future attacks.

Repels and Kills Ticks, Fleas, and Mosquitos

The active ingredients in K9 Advantix II help keep your dog safe from ticks, fleas, and mosquitoes. These effective compounds attack the pests' nerve cells, paralyzing and effectively killing them, as well as repelling them from future attacks. Most ticks are repelled and killed before they can attach, which may reduce the risk of transmitting disease-causing organisms to your pet. K9 Advantix II effectively kills and repels Deer ticks, American dog ticks, Brown dog ticks, and Lone Star ticks.

K9 Advantix II for Medium Dogs up to 11-20 lbs
  • Kills and repels ticks, fleas, and mosquitoes
  • Repels biting flies and kills lice
  • Waterproof formula won't wash off from swimming or bathing
  • Includes four convenient one-month doses
  • Easy to apply
  • For dogs seven weeks of age and older and weighing 11-20 pounds and under
  • Per Dose: $11.75
Dog flea life cycle
K9 Advantix II and Frontline Plus Comparison Chart
Fights Against Fleas at All Stages of Development

K9 Advantix II protects your pet against fleas at all stages of the parasite's development. K9 Advantix II breaks the flea life cycle by killing the living fleas on your dog before they can lay eggs. It also prevents the development of existing flea eggs, larvae, and pupae, helping to prevent future infestations.

K9 Advantix II also kills reinfesting fleas (newly hatched fleas jumping back on your dog) within two hours, and it prevents fleas on a treated dog from infesting your home.

Effective Against Biting Flies and Lice

In addition to complete tick, flea, and mosquito protection, K9 Advantix II also repels painful biting flies from feeding on your dog, and it effectively kills up to 100 percent of lice within one week of treatment.

Waterproof Formula

K9 Advantix II is waterproof, so there's no need to reapply after your dog has a bath or goes for a swim. Studies show that dogs are still protected against parasites after exposure to water, though for best results, dogs treated with K9 Advantix II should be bathed with a non-detergent shampoo.

Package Contents

Box includes four 1.0-milliliter tubes of K9 Advantix II for Medium Dogs 11-20 pounds.

Flea Cycle

Usage Info

How to Apply

Applying K9 Advantix II to your pet is a fast and easy process. First, remove the K9 Advantix II applicator tube from its packaging and use scissors to peel down the foil. Next, hold the applicator tube in an upright position and pull the cap off the tube. Use the upturned cap to break the protective seal, and you're ready for application.

For easiest application, your dog should be standing upright. Evenly apply the entire contents of the K9 Advantix II tube to two or three spots from the back of the shoulder to the base of the tail. Part the hair at each spot until the skin is visible, then place the tip of the tube on the skin and gently squeeze out a portion of the solution. Be careful not to apply an excessive amount of the solution in any one spot, otherwise some of the solution might run off the side of your dog. Dispose of the container and do not reuse or refill. Do not empty unused product in any indoor or outdoor drain.

For optimal control and prevention of parasites, use K9 Advantix II every month. K9 Advantix II is available in four- and six-month supplies. Do not use K9 Advantix II on cats or any animals other than dogs.

Application Instructions

Evenly apply the entire contents of the tube to four to six spots on the top of the back--from the shoulder to the base of the tail. Apply monthly.

Length of Effectiveness

Under normal conditions, the product is effective for one month. However, in cases of severe flea infestation, retreatment may be necessary earlier than four weeks. Do not retreat more often than once every seven days. After flea control is attained, return to a monthly retreatment schedule.

Hazards to Humans

Causes eye irritation. Harmful if swallowed. Do not get in eyes or on clothing. Avoid contact with skin. Wash hands thoroughly with soap and warm water after handling.

Hazards to Domestic Animals

*For external use on dogs only.
*Do NOT use on animals other than dogs.
*Do NOT use on puppies under seven weeks of age.

Do not get this product on dog's eyes or mouth. Consult your veterinarian before using this product on debilitated, aged, pregnant, or nursing animals. Individual sensitivities, while rare, may occur after using any pesticide product for pets. If signs persist, or become more severe, consult a veterinarian immediately. If your animal is on medication, consult your veterinarian before using this product.

Do Not Use on Cats

Due to their unique physiology and inability to metabolize certain compounds, cats must not use this product. If applied to a cat, or ingested by a cat that actively grooms a recently treated dog, this product may have serious harmful effects. If this occurs, contact your veterinarian immediately.

Environmental Hazards

This product is extremely toxic to fish. Do not add directly to water. Do not contaminate water when disposing of product or package.

First Aid

Have the product container or label with you when calling a poison control center or doctor, or when going for treatment.

If in eyes: Hold eye open and rinse slowly and gently with water for 15 to 20 minutes. Remove contact lenses, if present, after the first 5 minutes, then continue rinsing eye. Call a poison control center or doctor for treatment advice.

If swallowed: Call poison control center or doctor immediately for treatment advice. Have person sip a class of water if able to swallow. Do not induce vomiting unless told to do so by the poison control center or doctor. Do not give anything by mouth to an unconscious person.

If on skin or clothing: Take off contaminated clothing. Rinse skin immediately with plenty of water for 15 to 20 minutes. Call a poison control center or doctor for treatment advice.

To physician: Treat patient symptomatically.

Keep out of reach of children.



How long does K9 Advantix last?

A single application of K9 Advantix keeps working for one month.

How often should I use K9 Advantix?

Experts recommend monthly application to keep your dog protected year-round.

My dog is strictly indoors. Should I still use K9 Advantix?

Yes, ticks and fleas can be brought into the home by people or other pets--without owners even realizing it. Immature flea stages remain dormant until conditions are appropriate for development. This is why it is also important to protect indoor pets.

Can I bathe my dog during the month after application?

Yes, you can give your dog a bath. A non-detergent shampoo is recommended for best results.

How young can the dog be for application?

K9 Advantix is gentle enough for puppies as young as seven weeks.




Imidacloprid is an ectoparasiticide, an antiparasitic agent that targets parasites living primarily on the surface of a host. Chemically classified as a chloronicotinyl nitroguanidine, imidacloprid inhibits neurotransmitter transmission in insects, resulting in paralysis and death.


Imidacloprid exhibits both adulticide and larvicidal flea efficacy; it not only kills adult fleas and larvae on your pet, but it also kills larval stages in your pet's immediate surroundings.

Main Purpose

To kill fleas at all stages of their life cycles and stop them from being able to move or feed.


Permethrin is the additional ingredient in Advantix. It belongs to the Type I class of pyrethroid acaricides and insecticides, and it also acts as a repellent. Pyrethroids affect muscle and nerve cells' sodium ion channels by increasing their mean open time, which leads to hyperexcitability and death of the parasite.


Thanks to its repelling activity, permethrin reduces parasite bites and thus the risk of diseases and stress for your dog.

Main Purpose

To repel ticks, sand flies, and mosquitoes; to kill ticks and fleas.

Two Proven Ingredients with Enhanced Activity

Imidacloprid and permethrin work together to overwhelm the nervous system of the parasite, providing neurotoxic activity beyond that of each compound alone. This leads to more profound and quicker insect paralysis and death.

Specifically, imidacloprid increases the efficacy of permethrin by activating insect nerve cells and increasing the frequency of neurotransmissions. As a result, more sodium channels are opened and the pyrethroid can interact much better with its target site.


Pyriproxyfen is a pyridine-based pesticide. A juvenile hormone analog, it interferes with the hormone signaling of growing insects, so that insects in immature stages are unable to mature. Additionally, a female insect that touches the toxin will produce eggs that will not hatch.


Pyriproxyfen provides an added layer of protection for pets and their surroundings. It interrupts the flea life cycle at multiple stages, halting the growth and development of insect eggs and larvae and preventing reinfestation.

Main Purpose

To prevent flea eggs from hatching and larvae from growing.

Active Ingredients % by Weight
Imidacloprid 8.80%
Permethrin* 44.00%
Pyriproxyfen 0.44%
Other Ingredients 46.76%
Total 100%
*cis/trans ratio: max 55% () csi and min 45% () trans
Net Contents

Four tubes, each 0.034 fluid ounces (1.0 milliliters)

6 MONTH K9 Advantix II GREEN for Small Dogs (upto 10 lbs)6mo Sml Dog (4-10lb) K9 Advantix 2Reg price: $101.99
Sale price: $74.95
12 MONTH K9 Advantix II GREEN for Small Dogs (upto 10 lbs)12 Mo K9 Advantix II (up to 10lb)Reg price: $198.99
Sale price: $148.95
6 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)6mo Med Dog (11-20lb) K9 Advantix 2Reg price: $100.99
Sale price: $74.95
12 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)12 Mo K9 Advantix II (11-20lb)Reg price: $196.99
Sale price: $148.95
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Customer Reviews

DISCLAIMER: The results described on the testimonials on this site, are the individual experiences and personal opinions of those who have purchased and used the products. These testimonials are not intended to make any claims that the products can be used to diagnose, treat, mitigate, cure or prevent any disease or medical condition.
Click here to see all reviews
Good Buy by aj from PA12/01/2011

Always arrives quickly, the box is always smashed, but the product inside is fine.

K9 ADVANTIX II by Love My Dogs! from Cincinnati, Ohio10/21/2011

I have 2 dogs - a Japenese Chin that is 7 years old and a 4 year old rescued Shih- tzu who are my Buddies, I never want them to suffer from fleas irritating and biting. I've tried cheaper brands in the past and will never go back ----K9 ADVANTIX II is the best------Never seen a single flea on my Buddies!

by from 02/11/2012

The fleas aren't so bad this year (it's dry) but my dog can pick up fleas from visits to the dog park. I got the K9 Advantix (it works well on the cats) because I knew it would work.

to by have from anyYou


K9 Advantix Works by Schatze239 from Estero, Florida04/09/2014

Have been using this product for 6 years and haven't seen a flea or a tick. Very pleased with the product and Chloe, my shih tzu, doesn't seem to mind having it applied to her backside.

ticks dont die by shortie from wisconsin06/12/2013

The wood ticks dont die and fall off. They stay stuck and when you take them off they are still alive. It doesnt seem to repel the ticks either.

by tdh from charlotte, nc03/13/2013

A friend of mine recommended this product after having tried several others. I decided to not waste my money doing the same thing and have been ordering this for 1.5 years. We have 2 dogs and in that time I have only seen 1 flea on one dog. However, I have had a few bite me and my indoor cats keep getting fleas.

good purchase by Diane from Sherbrooke Quebec05/31/2013

very happy of this puchase...Excellent price..Will order many things more soon...Thanks...

K9 Advantix II by Cynthia from Oklahoma12/04/2012

K9 Advantix II is THE best flea and tick medicine I have EVER used, from the ease of application to the protection it provides my two dogs!

Great product by Jana07/19/2012

I have used K-9 Advantix on my dogs since it came out and we have never had problems with fleas. I never have to worry about them getting sick from the application either. I highly recommend this for cats and dogs.

Wonderful service by Sheri from East New Market, MD05/12/2013

I get my dog and cat supplies from here only, I don't even bother to look anywhere else. I have never been disappointed.

ADVANTIX II Medium Dog by KShep from Turnersville, NJ05/01/2014

Best price for best product of this kind. Used on Two 20 lb. pugs.

Worth Every Penny by Momma from Troy, NY10/23/2012

Our 3 dogs never have a bug - ever! Many of my friends/neighbors are upset that in spite of using flea/tick control products their animals still get fleas and ticks. Our dogs have never (thank God) gotten a bug on them. We recommend this product to everyone.

by grandma opal from Kerrville TX12/26/2012

Great product good prices. Fast shipping.Thanks.

by me09/12/2013

works way better than other brands !! Does not both my very sensitive dog

Best topical flea product!!! by Dee M. from Gladstone, Oregon11/06/2012

This is by far the best topical flea product on the market! It not only gets rid of currently fleas/larvae, but it keeps them away so my dogs don't scratch at themselves at all!

Best for Getting Rid of Tick and Fleas by Katie07/05/2012

In my opinion, this prodict is the best on the marktet for keeping your pets comfortable and happy. The price was one that you could not pass up and the delivery was really quick. Thank you Entirely Pets!!

relief by cj from Marietta, GA07/16/2012

Within seconds of applying the Advantix to our dog the fleas began to die. They actually came to the surface where we were able to remove and destroy. Fastest acting flea product we have used and we have tried a lot of them. Our dog is a happy girl now.

do not buy! by missy from California09/20/2011

I have used Frontline successfully on my dog, but decided to try the K9 Advantix II due to mosquitoes and flies being prevalent this summer. I followed instructions carefully. Soon after administering within the hour i could see my dog was uncomfortable. After 2 he was twitching and running into places in our home he does not normally go. I called the hotline on the box Bayer, and they told me to wash off the areas and to do it a few times. Then to apply vitamin E to those areas. My poor doggie was still very uncomfortable and trembling unable to relax that entire day. As well into the next day. I checked online on this product and found more problems worse then what we experienced with use of K9 Advantix II. My dog is about 40 lb.'s and only 4 years old and healthy. He is a poodle bichon mix. Please if you have not used this product. Dont try it!

product works by country girl from LA11/14/2013

Advantix II works. My dog has never gotten fleas with other brands but he has had ticks. This product works to prevent fleas & ticks and kills ticks. I like all of the Bayer brand products.

Never Disappointed by Sheri10/10/2011

I buy Advantix 11 for all my animals. I save alot of money buying it this way. It can be very expensive since I have four dogs and a cat. Its fast shipment and its easy to purchase.

Works by Katy from Texas06/12/2014

I used this last year and was able to get rid of the fleas on my dog and in my house. It just took a while to work completely.

Mosquito protection for the summer by rox from Virginia12/24/2012

We use both Frontline and Advantix products for flea and tick prevention, but switch to the Advantix during our humid summers when mosquitoes are plentiful. Our dog has allergies and sensitive skin, but has not had any adverse reactions to the Advantix.

by joy from WI10/22/2012

Very good product, Never have a fea problem or any bugs on my 3 dogs.

Best Purchase ever by Tonie from Trenton, Ontario, Canada09/22/2013

I loved the service and how easy the web suit was. I will order from here, from now on.

Not very pleased with K-9 Advantix ll by Taffyocala from Ocala, Fl09/30/2013

My dog still had fleas after applying the flea medicine on her.


As a single parent to my Bichon, times are tough, but I don't want to compromise her health care. Entirely Pets along with Groupon made it possible for me to continue to keep Maggie protected against fleas, ticks, and the disease they carry.

by dadsangel9288111/24/2012

Best product on the market in my opinion!

Best of the best by Carol05/22/2013

I trust this product and would not use anything else. I love my pets , they are my family and would you not give the best to your family if possible?

Product is excellent by hagarmsu from Atlanta Ga10/22/2012

I tried to order on line and because I put in the wrong e mail address,( I could not delete it and put in the correct one.) I COULD NOT ORDER I finally had the staff at Groupon do the online order for me. Your staff people were no help. I don't think I will try to order again, since I tried three seperate days and the same BAD order kept coming up that would not allow me to go on.

Great Product by MaddysMom from NY11/30/2011

I use this on my Cavalier King Charles Spaniel and have not found one flea on her, even after going through wooded areas or being exposed to other animals with fleas. I am very satisfied with it's performance, especially in the summer time when she swims very often. No problems between applications.

Good Prices by Griz from CA11/15/2013

Always the lowest prices. Shipping of ADVANTIX however could be improved in packaging.

always good by vic07/25/2012

Always what I want when I need it and I get it fast

not sure about new formula by cee from southern Indiana04/24/2012

I have used the original Advantix and Frontline Plus without a problem. I used the Advantix 2 and first of all, the formula seems oiler than usual. I have long haired dogs and the formula never seems to absorb even though I part the hair & apply to skin. Secondly, two of my dogs had attached ticks within 2 weeks. Not sure if this is as good as original.

Great product by Sasksi from Roanoke, VA02/06/2013

I have used Avantix for several years now and have experienced no problems with it.


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