Advantage II Flea Spot Treatment for Dogs, 11-20 lbs, 6 Doses (6-mos. supply)

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About This Item

Details

  • Flea protection for dogs weighing 11 to 20 pounds, at least 7 weeks old.
  • Easy-to-apply monthly topical treatment.
  • Delivers total flea protection and kills adult fleas, flea larvae and flea eggs through contact.
  • Starts killing fleas the same day and keeps working for 30 days.
  • Fragrance-free formula is waterproof after 24 hours of application.

Ingredients

Instructions

Size

FAQ

Learn More About Advantage 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 Advantage II for Dogs

Get the Advantage Over Fleas

Advantage II topical flea treatment and prevention for dogs kills fleas on your dog within 12 hours, and it continues to protect for 30 days. It’s easier to use than hard-to-swallow pills—simply apply the convenient drops once a month. Best of all, Advantage II is available without a prescription.

How Advantage II for Dogs Works

The active ingredients in Advantage II for Dogs (imidacloprid and pyriproxyfen) spread over the skin and hair coat. Fleas are killed through contact, so they don’t have to bite your dog to die. Do not use on cats.

Flea Treatment and Prevention

Advantage II doesn't just treat fleas––it breaks the flea lifecycle to prevent reinfestation.

Reliable Flea Protection

These flea drops kill adult fleas, flea larvae, flea eggs, and chewing lice.

Same-Day Effectiveness

Advantage II kills fleas on dogs within 12 hours, and it continues to prevent reinfestations for four weeks.

No Prescription Needed

You don’t have to go to the vet to get quality flea protection for your dog—simply buy and apply.

Fragrance-Free

This flea topical formula is fragrance-free and waterproof 24 hours after application.

Frequently Asked Questions

Can I Use Advantage II on My Dog?

Advantage II is for dogs 7 weeks of age and older. The product comes in four sizes: Small Dog (3-10 lbs.), Medium Dog (11-20 lbs.), Large Dog (21-55 lbs.), and Extra Large Dog (over 55 lbs.). Choose the right size based on your dog’s weight. Not for use on cats.

How Do I Apply Advantage II?

Break the seal on the tube, then part the hair on your dog’s back between the shoulder blades to show the skin. Squeeze the tube to expel the entire contents directly onto the skin. The number of application spots will depend on the weight of your dog—see product label for detailed instructions.

The Advantage Family

Get the Advantage over fleas with complete flea protection for your pet, home, and yard. The Advantage family of products has everything you need for a complete flea treatment and prevention plan, including monthly topical treatments, pet shampoos and sprays, household sprays for carpets and crevices, and even a yard and premise spray. Just be sure to get the right product for each need and use only as directed.

Shop K9 Advantix II

Questions & Answers

6 Customer Questions


does this product have a citrusy smell??

Answer by ChewySep 18, 2019
This product does not have any added scent.

Does this kill or repel ticks

Answer by ChewyOct 20, 2021
This treatment does not kill ticks. It kills all life stages of fleas and treats, prevents, and controls lice infestations.

Will this be effective for a dog already infested?

Answer by ChewyJun 28, 2021
This spot treatment can be used for a current infestation or as a preventative. It will begin working within 12 hours to kill fleas on contact.

Is it a pill?

Answer by ChewyDec 04, 2020
This flea treatment is a topical treatment.

4.4
Rated 4.4 out of 5 stars
698 Ratings

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

83% Positive

Effectiveness

79% Positive

Ingredients

77% Positive

Long-Term Benefits

78% Positive

371 Customer Reviews



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 Sara on Nov 1, 2025

Relief for my itchy dog

My little poodle/bischon was using a different topical treatment that seemed to be working for a while. I don't know why it stopped working but he got a flea infestation

My little poodle/bischon was using a different topical treatment that seemed to be working for a while. I don't know why it stopped working but he got a flea infestation at the end of summer and it was awful. I tried Advantage II because it had great reviews. I saw major improvement after a couple of days. I have not seen anymore fleas on his fur or in our house.


Rated 5 out of 5 stars
By sunangel on Sep 18, 2025

recommended by a neighbor

previous dogs suffered seizures from soresto and allergic to just about everything else; the natural solutions were no match for Florida fleas; skeptical but this

previous dogs suffered seizures from soresto and allergic to just about everything else; the natural solutions were no match for Florida fleas; skeptical but this advantage II really works and no unpleasant side effects. i had tried other topical flea treatments and the dog acted like fire had been placed on their back; this product did not do that. so far this has been the best for my little dog Chloe aka baby werewoof


Rated 1 out of 5 stars
By Judith on Nov 11, 2025

Poor

Not sure if fleas have gotten use to this topical, but it did nothing to stop fleas this year. Especially for cats. Won't buy again.

Not sure if fleas have gotten use to this topical, but it did nothing to stop fleas this year. Especially for cats. Won't buy again.


Rated 5 out of 5 stars
By Nathan on Nov 16, 2025

Fast delivery

Good product. Glad we can now schedule and adjust schedule of delivery.

Good product. Glad we can now schedule and adjust schedule of delivery.


Rated 5 out of 5 stars
By Katrina on Nov 14, 2025

Ease of selection

Prompt shipment, couldn't be Happier keep up the Superior Job/ support

Prompt shipment, couldn't be Happier keep up the Superior Job/ support


Rated 4 out of 5 stars
By Leslie on Oct 10, 2025

Good product and Chewy delivers on the spot

My babies need a change and they really like it. So they purrrred more. No more chicken!!

My babies need a change and they really like it. So they purrrred more. No more chicken!!


Rated 5 out of 5 stars
By Holley on Dec 27, 2025

Works great.

Great for a dog that can't take the pills.

Great for a dog that can't take the pills.


Rated 5 out of 5 stars
By LOWELL on Aug 26, 2025

The fastest shipment needed pet meds were delivered the next day to my hime

First time I ever been on this site to order medication there shipment was delivered to my home the very next day

First time I ever been on this site to order medication there shipment was delivered to my home the very next day


Rated 5 out of 5 stars
By Nancy on Jul 14, 2025

Speedy delivery

I can always rely on speedy and timely delivery. My dog gets very excited when I tell him the package is for him. He starts jumping.

I can always rely on speedy and timely delivery. My dog gets very excited when I tell him the package is for him. He starts jumping.


Rated 5 out of 5 stars
By Alma on Oct 2, 2025

Easy to apply

Works great and safe when dry with our cat in the house

Works great and safe when dry with our cat in the house