K9 Advantix II Monthly Flea & Tick Prevention for Large 21-55lbs Dogs - 2.5ml/2pk
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4.8 out of 5 stars with 37 reviews
5 out of 5 stars
7 April, 2026
originally posted on influenster.com

Easy to apply
[This review was collected as part of a promotion.] Easy product to apply. I think my dog needed two people to apply this product as she wouldn’t stand for me. The dosage is pre measured in small tubes with a narrow tip for application. It lasts for one month. Setting a reminder on your phone can help applying the dose on time. My big girl didn’t seem to mind having the product applied. She didn’t act like the product bothered her in any way.
4 out of 5 stars
6 April, 2026
originally posted on influenster.com

Easy, clean, and effective
[This review was collected as part of a promotion.] I love this prevention!! The only thing I would change would be application as multiple pets can lick it off of each other. Easy to follow instructions and little to no residue is left
5 out of 5 stars
6 April, 2026
originally posted on influenster.com

Effective
[This review was collected as part of a promotion.] It is very effective in preventing fleas. I like that it's an easy application and it does not leave residue. The only thing that I've notice with my dog is that she scratches alot (she does not have fleas). I don't know if it's this medication.
5 out of 5 stars
30 March, 2026
originally posted on influenster.com

Just as advertised!
[This review was collected as part of a promotion.] The K9 Advantix II for large dogs did just as advertised. Our dog loves playing in the woods in our back yard and we used to find ticks on her every few days we would have to pick off. Since we have treated her with K9 Advantix II we no longer find any. There is no rough scent to deal with and so far it has lasted several weeks. The instructions were a little unclear but other than that it was great!
5 out of 5 stars
28 March, 2026
originally posted on influenster.com

Works great
[This review was collected as part of a promotion.] The instructions are very clear and simple. It states the dosages very clearly for you to read and understand. My dog didn’t have any kind of reactions. It worked very good a pretty quickly. My dog hasn’t had any issues with any flea or insect since applying it on her.
5 out of 5 stars
24 March, 2026
originally posted on influenster.com

Great product!
[This review was collected as part of a promotion.] The K9 Advantix II for my new rescue pup is just what we needed to ensure my pup was safe and protected from unwanted from fleas ticks and mosquitoes in my areas! There is no gross scent and the value is worth the money. This will be used all year to protect my baby. Will definitely be used monthly in my house!
5 out of 5 stars
23 March, 2026
originally posted on influenster.com

Simple to use, long lasting
[This review was collected as part of a promotion.] Ticks are out early so It’s spring maintenance time. Application was simply, love that it has a pleasant scent and last for the entire 30 day duration .
5 out of 5 stars
23 March, 2026
originally posted on influenster.com

Easy to apply
[This review was collected as part of a promotion.] Easy to apply works great no ticks, fleas, lice or other bugs biting bugs. He is happy and playful as ever. Ut has no bad effects as far as I can tell.
5 out of 5 stars
23 March, 2026
originally posted on influenster.com

Effective and easy to use
[This review was collected as part of a promotion.] Got this just in time! Doggy was starting to get fleas and applied this and soon after no more scratching and biting at himself. Happy to have him get some relief! Was easy to apply, no strange odor, and no discomfort to our doggy. Box is compact so easy to store if not needed right away, the little tube inside was easy to open and squeeze it gave me no hassle. All product came out and spread easily on neck. Was lightweight and easy to use.
5 out of 5 stars
23 March, 2026
originally posted on influenster.com

Excellent product
[This review was collected as part of a promotion.] I am excited to try this product! We have used similar products in the past. However, the quality of this product seems to be superior to the ones I have tried in the past.
5 out of 5 stars
23 March, 2026
originally posted on influenster.com

Help your dog be scratch free this spring.
[This review was collected as part of a promotion.] This product absolutely helped my dog in so many ways but I have never seen him be able to run around without scratching himself but after I used this product he was able to run and play without scratching.
4 out of 5 stars
21 March, 2026
originally posted on influenster.com

Looking forward to results
[This review was collected as part of a promotion.] We buy a this product every year for our two dogs. While, I’ve never tried this brand until now, I’m looking forward to seeing how it works for our babies. Instructions are super easy to follow and the texture looks just fine. I’m happy with the amount of time between doses.
5 out of 5 stars
21 March, 2026
originally posted on influenster.com

My dog took the medicine without fuss and that’s n
[This review was collected as part of a promotion.] Darby took her Advantix and has been able to enjoy the outdoors without any flea and tick problems. No side effects, single dose and long lasting. I was able to finish using the current medication without this expiring. Price is similar value to other flea and tick medicines.
5 out of 5 stars
19 March, 2026
originally posted on influenster.com

Works well!
[This review was collected as part of a promotion.] This product seems to be effective in keeping ticks away. We always apply a tick repellent every spring and this one is nice because it’s from a reputable brand, is a liquid consistency for easy and quick application (which is always great with dogs) and doesn’t leave a sticky residue after it has been applied.
5 out of 5 stars
19 March, 2026
originally posted on influenster.com

Great product for flea, mosquito and tick protecti
[This review was collected as part of a promotion.] Easy to apply. I have used in the past and like how easy it is to use. You put it in a small area on the back and it will absorb and give coverage to you whole dog. Lasts throughout 30 days. Did not cause any discomfort on my dog. Vials are small and easy to store in a drawer. This is good to have if you live in an area where ticks are present.
5 out of 5 stars
19 March, 2026
originally posted on influenster.com

Gotta get!
[This review was collected as part of a promotion.] If you have a dog you know prevention is key!! I have one of my many that is so prone to fleas-this helps keep him comfortable and my mind at ease for my little bestie! Highly recommend
5 out of 5 stars
18 March, 2026
originally posted on influenster.com

K-9 advantix 11 Large dogs
[This review was collected as part of a promotion.] I have 6 dogs of different sizes , from a tiny shitzu to a cane corso ,so it can be pricey for all their treatments. Advantix K-9 makes it more affordable and their items are trustworthy and good quality.
4 out of 5 stars
18 March, 2026
originally posted on influenster.com

Easy application with no side effects
[This review was collected as part of a promotion.] Can recommend this topical flea/tick treatment. I like that it doesn’t require scissors to open and is easy to open using its lid. I took one star off due to having to apply it to multiple spots rather than one single spot during application, but it’s better than other brands that require you to apply in a long line from neck to tail. My dog has not experienced any negative side effects or itching from the medication, which is a huge plus! Still too early to tell its full effectiveness, but so far, it’s doing its job!
4 out of 5 stars
18 March, 2026
originally posted on influenster.com

Worth it
[This review was collected as part of a promotion.] This is a monthly dose that works well at preventing fleas and ticks on dogs. With the one month application it was successful and I did not see any fleas or ticks on my dogs.
5 out of 5 stars
18 March, 2026
originally posted on influenster.com

Good tick prevention
[This review was collected as part of a promotion.] I live in an area with a lot of ticks. This has helped so much to prevent them from going on my dog. I don’t find any ticks on him anymore, and I only have to reapply it monthly.