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

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

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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 twelve convenient one-month doses
  • Easy to apply
  • For dogs seven weeks of age and older and weighing 11-20 pounds and under
  • Per Dose: $10.67
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

2 Boxes includes six 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

Twelve tubes, each 0.034 fluid ounces (1.0 milliliters)

4 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)4 Mo K9 Advantix II (11-20 lbs)Reg price: $70.99
Sale price: $49.95
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
4 MONTH K9 Advantix II RED for Large Dogs (21-55 lbs)4 Mo K9 Advantix II (21-55 lbs)Reg price: $71.99
Sale price: $49.95
6 MONTH K9 Advantix II RED for Large Dogs (21-55 lbs)6mo Lrg Dog (21-55lb) K9 Advantix 2Reg price: $101.99
Sale price: $74.95
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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
K9 Advantix II by Doxie Mom from Stockbridge, Georgia10/29/2013

I have been using this product for three years. It really works well on fleas and especially our nasty Georgia ticks. Entirely Pets has a great price and the shipping is extremely fast.

Great product great price by Kay from Near Cleveland, Ohio01/26/2012

I've used this product for years mainly because it also protects against mosquitos. It's done an outstanding job in keeping my three dogs safe and healthy.

Life Saver by StarIrinaSakura from Modesto, CA08/01/2013

When I first got my dog I was unsure of what to use. After a while, I thought I didn't need to have any type of insect protection for him since he was indoors, but what I didn't know was that my mom loved to garden and that led to her bring fleas into the house. I was so frustrated every time I found a flea on him. Granted we caught it early enough and bathed him in flea killing shampoo so that it didn't spread so much, but my goodness after the 5th time I had had it. I ordered this product and have not seen a flea on him once. It's easy to apply. Bathe dog, put a couple drops along the back, and he's good to go! My area has tick as well. I've gotten him the Lyme vaccination, but this reassures me that he's be protected. Love this product!

Well Satisfied! by RalfAvery from San Diego, CA03/20/2014

Product used in inland Southern California on a Bichon Frise. We have been using Advantix II for several years. It's effective. Never see a flea. Rarely a tick. Fast service from Entirely Pets.

Great product for flea and tick by hbp from Northern Virginia12/05/2012

We have been using Advantix II to prevent fleas and ticks on our dog since he was a puppy. It is very effective and is the one product that doesn't cause him allergic reactions.

Best Product on the Market by Gayle from Tucson, AZ08/11/2012

I have used Advantix II for years and never been disapointed in the results. Have not encountered any pests since I began using it.

great service by Africa from Eaton, IN10/23/2012

You are a great company! All my dogs approve!!

Excellent Flea/Tick Preventive by Heather from Dallas, TX08/04/2014

We consider this the best all-around product. We have used it successfully for a couple of years with complete success.

Best price! by Buddy07/03/2012

Great items at great prices! i only use K-9 Advantix because it protects my dog from multiple bugs.

Works well by JOE D from Spring Hill, Fl04/15/2013

Use it because it fights mosquitos. Our pet had heart worm when we rescued her from the ASPCA 10 years ago.

by sweet from Watsonville,Ca07/15/2013

I tried others. This works the best! I recommend this product!

A product I trust by kfarr22 from Cleveland, Ohio area10/23/2012

I've been using this for a number of years on my 3 dogs and it does exactly what it says it will do. My pets are completely protected from fleas, tics as well as mosquitos. No if's, and's or but's......it works!!!

HAD TO CANCEL ORDER due to customer service by cbaycove from Southbridge, MA06/13/2014

The day after my order WAS ACCEPTED, received an email requesting the code off the back of my CC. Thought this was rather a strange email, since my order had already been accepted by the company through the website. I had to give up the code or cancel the order. I cancelled the order and got an even better deal at 1800PETMEDS! I find it unethical that the order placed and accepted had to be cancelled because your website did not request the CC code with the acceptance of the order.

by never received the produc04/08/2013

I never received the order I placed. I can not comment on something I did not receive. The order is pending and I wrote to you to see why no reply would I use your site again NO!

Need more specific weight categories by Gitanjali from India01/27/2015

This product does work. However it is not very weight specific. For dogs just over 20 lbs, this tube won't work and the next weight category is very high. So I use 2 of the teal tubes. For my great danes I use the one above 55lbs. But they are probably way over 100lbs. So I have to use other tick and flea precautions in addition. It's a good product but if it could have a few more weight categories rather than 3 very wide ones - would be more effective.

Great Value for a Great Product by Angel from York, PA10/22/2012

I've shopped all over the Internet and Entirely Pets is always able to offer the best price on Advantix II...My vet says Advantix is the best product for flea, tick and mosquito. Others try to imitate it but can't replicate it.

Great Purchase by chicken from Maryland08/18/2014

Very pleased with the way the K9 ADVANTIX works on my dog would recommend it.

Shipped on time!!! by mduff07/22/2012

Last time I ordered flea/tick control online (different company). I waited three weeks before I got my order. Fleas were out of control by that time. Entirely Pets: GREAT PRICES and fast shipping :-)

Advantix Does the Job on Pests by GeeGee from Gainesville, FL01/04/2012

I have 6 Shih Tzu and a Toy Poodle. Here in NC Florida the hot dry weather provides ideal conditions for both fleas and ticks. We were heavily infested with both a couple of years ago and tried everything on the market. Nothing stop the pests. Then we tried Advantix. Within two months we were rid of both fleas and ticks. I can honestly say that the results are far ahead of any other leading brand in keeping flea and ticks under control. I highly recommend it.

Effective flea and tick control by agiltiysheltiemom06/26/2014

Advantix II seems to be the best available product for flea and tick control available. Some of the newer products seem too dangerous. Frontline is no longer effective enough. Entirely Pets always has the lowest price for this product, especially when you can find a sale.

Just what I needed! by Shar from Where ever we park07/20/2013

Product was received quickly, very smooth transaction, would buy from Entirely Pets again! Have used K9 Advantix for years with fantastic results.

Great product really works by Griffy10603/07/2013

great product, no problems using it on my dogs. I have never had a flea or tick problem in the 5 years I have been using it.

by JD06/08/2013

Product is easy to apply & it works great.

Best topical for ridding pet of fleas and ticks by TommieM from Gainesville, FL09/28/2013

I have several longhaired Shih Tzu dogs. It only takes one stroll outside to pick up a few fleas and even ticks. I have used several different brands of topicals but none compare with Advantix. Both pests are quick to die out and it keeps the young fleas and ticks from developing into biting adults.

Best purchase ever!! by Lisalisa from Ball Ground, Ga.06/26/2012

K9 advantixII is a great product, but what makes this purchase the best ,is that I ordered it on a Monday, expecting shipment to be within around a week, and I received it Wednesday!! Less than two days, since I purchased it in the evening...online. You can't impress me anymore than they did...I am amazed. I didn't order express ....either. The boxes were in great shape, the packaging impeccable....and the price was too great to pass up. I recommend entirely pets to ALL my friends.

by from 10/22/2012

K-9 advantage by Lennie from New York, NY03/20/2013

I honestly love this product, I've used it since I got my dog Romeo at 3 months of age . I am thankful I did not have to try different brands to find the one that would work best for him. Besides being an effective product it's also very affordable and harmless for my dog.

Only Flea and Tick Prevention I Use by Mary311 from Atlanta, Ga06/12/2014

This keeps my 2 small dogs tick and flea free! When I do find ticks, they are dead. Love Entirely Pets for great prices and fast shipping.

Our vet recommended it. by Dick07/17/2012

We are in Maine during flea and tick season and our vet recommended Avantix II over Frontline Plus. After their discounts, EntirelyPets had the best price I found on the web and it arrived in a few days. Free shipping, too.


I not only want my home to be pest free but I want to protect my special little Boston from any discomfort or disease. I have been using this product since it came out. I used the previous version before. My pet is now 12 years young and he's healthy and frisky. I take him to Atlantic City and board him there. I know he's safe from ticks, fleas, mosquitos, and every other possible insect danger.

Works Great by Schnauzer Mom from Norman, OK10/10/2011

I use this product on my three dogs and never have problems with fleas or ticks. The special offers from Entirely Pets help with the cost.

Best for Poms by Ames from Louisiana10/23/2012

I have 4 poms and with all that hair and live in the South. I have been using K9 Advantix for 7 yrs. and it seems to be the working just fine for us.

Doesn't seem to work well anymore by doglover1608/15/2012

K 9 Advantix and Advantx II have been used on our 16 dogs for too many years perhaps because the fleas don't seem to care. This is certainly not Entirely Pets fault, darn fleas are stubborn, same thing happened with Frontline in 2007 after years of use, always recommended until last few months and still seeking an alternative, hopefully more natural way to prevent fleas and ticks.

by from 06/12/2012

This product works great on my 2 dogs! My dogs have no adverse reaction from applying this product.

& by I from canPrice


Great product! by Sandy from MA03/06/2013

This product is great! It lives up to it's claims. I always buy it for my family member on 4-feet.

Good Stuff by Kim07/03/2012

Have used advantix for long time. Works good. No fleas. Good product.

Top purchase by Lufta848 from Florida03/19/2013

We and our dog can relax now. Ticks and fleas are behind us. Thanks for your good product.

The best online pet store ever by cwlyip01/27/2015

This is my second time to purchase products in EntirlyPets. Best experience ever.


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