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Description
K9 Advantix II Flea, Tick & Mosquito Treatment & Prevention for Medium DogsK9 Advantix II Medium Dog is the veterinarian recommended formula that helps defend your dog against five pests: fleas, ticks, mosquitoes, biting flies and lice. And unlike other treatments, K9 Advantix II kills and repels fleas, ticks and mosquitoes. K9 Advantix II topical treatment gets straight to work killing fleas on dogs within 12 hours of initial application. This formula stops existing flea infestations and prevents new ones by killing adult
K9 Advantix II Medium Dog is the veterinarian-recommended formula that helps defend your dog against five pests: fleas, ticks, mosquitoes, biting flies and lice. And unlike other treatments, K9 Advantix II kills and repels fleas, ticks and mosquitoes. K9 Advantix II topical treatment gets straight to work killing fleas on dogs within 12 hours of initial application. This formula stops existing flea infestations and prevents new ones by killing adult fleas on contact so they can’t lay eggs and they don’t have to bite your dog to die. Fleas, ticks, mosquitoes and other pests not only cause discomfort; they may also transmit disease. Monthly use of K9 Advantix II is important to protect your dog against fleas that may cause transmission of tapeworms. This formula also kills fleas which may cause Flea Allergy Dermatitis and flea bite anemia. That’s why K9 Advantix II Medium Dog topical, spot-on formula makes application simple - going on in seconds. It's easier than a flea collar and there are no hard-to-swallow pills. You’ll also love that K9 Advantix II is fragrance-free and waterproof after 24 hours of application. Check the product label for information on application and potential side effects. K9 Advantix II pest protection is effective on both indoor and outdoor dogs. Your dog should be at least 7 weeks old and weigh 11-20 lbs. to use K9 Advantix II Medium Dog. For the ultimate convenience in care, K9 Advantix II is available over the counter – no prescription needed. And, you can stock up with 2-dose, 4-dose and 6-dose packs so you never miss a monthly treatment. Once K9 Advantix II is applied, your dog is ready to get right back to big-pup cuddles and racing around the park. K9 Advantix II Medium Dog is a trademark of Elanco or its affiliates.
Key Features
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K9 Advantix II Medium Dog 30-day treatment & prevention protects dogs 11-20 lbs. from fleas, ticks, mosquitoes, biting flies and lice
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Kills fleas within 12 hours of application
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Vet-recommended formula kills & repels on contact so fleas don’t have to bite your dog to die
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Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours
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No prescription needed
Directions for Use
Use only on dogs. DO NOT USE ON CATS or other animals. Do not apply to dogs weighing less than 4 lbs. Remove applicator tube from the package. Use scissors and peel down foil. Hold applicator tube in an upright position. Pull cap off tube. Turn 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. Evenly apply entire contents of the tube along the top of the dog's back, from the shoulder down to the base of the tail. The number of spots depends on the size and weight of your dog (please refer to the product label). At each spot, part the hair until 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. Do not get this product in your dog’s eyes, or allow your dog to ingest this product.
Storage Instructions
Store in a cool, dry place inaccessible to children and pets. Protect from freezing.
Active Ingredients
Imidacloprid, Permethrin, Pyriproxyfen
Product Form
- Topical
Pet Size
- Medium
Pet Lifestage
- 7 weeks and older
Pet Weight
11-20 lbs
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
High quality fiber
Size: 81 Count (Pack of 1)
Excellent fiber. I take it twice a day so it does fast but it's the best fiber gummy I've used in terms of results. Some of the flavors aren't my favorite but they're all palatable. I like the gummies because otherwise I forget to take them. It's hard to remember to take them exactly between other meds so having these sit out helps.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
Works like a charm
Size: 81 Count (Pack of 1)
My gastroenterologist told me to take Benefiber, specifically, every day. I looked at a bunch of different kinds within the brand, and settled on this one because it seemed to have fewer ingredients I didn’t want. I was pleasantly surprised to find out they actually taste like candy my kids liked when they were younger.
Yes, they are gummy and stick together a bit, just like any other gummy product, but I had no problems getting them out of their container nor eating them, unlike some reviewers. I keep them in a cupboard in a spot where it’s always an average temp.
You can chew these or just let them dissolve in your mouth, something I do most often. I take them one by one after a meal, letting them slowly melt as I do other things before brushing my teeth.
The best thing? They actually work. You should definitely start small and slowly increase to what is prescribed to you. It makes the process easier and more pleasant. My digestion seems to be better, and I no longer have constipation, just normal, average, healthy stool. They are an expense at the amount my doctor has me on, but they’re worth every penny to not have the awful pain and nausea I had before I started taking them. Highly recommend.
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Reviewed in the United States on September 26, 2025
★★★★★ 5
Good stuff, tastes nice, does the job
Size: 81 Count (Pack of 1)
Same as in the retail stores, only it's actually available through Amazon. When we head to the stores to pick it up locally, there's a 90% chance it's out.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Tastes great and works well!
Size: 81 Count (Pack of 1)
I've tried a number of different competing products in this space and found these to be the right combination of tastes good and works well. I do recommend!
If they stick together in the container the probably got hot somewhere along the way to your house. Try freezing them and tapping the container ona counter. Should help break them apart.
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Reviewed in the United States on April 21, 2026
★★★★★ 5
It works!
This really solved a very obvious problem when one is on a Keto diet. It does the job gently-no side effects. This is a great product at a great price. Thank you.
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Reviewed in the United States on May 24, 2026