CAPSTAR Flea Oral Treatment for Dogs, 2-25 lbs, 6 Tablets -

Capstar Flea Oral Treatment for Dogs, 2-25 lbs

By Capstar
Rated 3.8981 out of 5 stars
Pet Weight

$38.50Chewy Price
$44.99Chewy Price
$36.58Autoship Price
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About This Item


  • Active ingredient Nitenpyram starts working within 30 minutes and kills adult fleas within 4 hours for dogs.
  • Safe for puppies four weeks and older and weighing at least 2 pounds; also safe for pregnant or nursing pets.
  • A single dose should eliminate current infestation, but may be given up to once per day if your pal gets fleas again.
  • Easy to give tablet with no messes or odors.
  • Unused tablets can be safely stored to keep their potency.

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Play Video: Learn More About Capstar From Our Team of Experts
Learn More About Capstar From Our Team of Experts

This product has recently undergone a packaging change. Customers may now purchase Capstar for Cats—it's the same great results with a brand new look!

About Capstar Oral Flea Treatment

Start Killing Fleas in Just 30 Minutes

When you have a flea infestation, you need to act fast! Capstar starts killing fleas within 30 minutes and is available without a prescription, so you don't have to wait. One tablet kills 90% of adult fleas in 4 hours for dogs and 6 hours for cats, offering quick relief for your pet.

Easy Oral Delivery

Capstar oral tablets go to work quickly to protect your pet from the inside out and start killing fleas in just 30 minutes! To give Capstar tablets, place the pill directly in your pet's mouth or hide it in food. If you hide the pill in food, watch closely to make sure your pet swallows the pill. If you are not sure that your pet swallowed the pill, it is safe to give a second pill.

Treat Every Cat & Dog in your Home

Capstar is available in two dose strengths for dogs and one dose strength for cats. Capstar is for dogs and cats 2 pounds or greater and 4 weeks of age and older. Each box of Capstar contains 6 fast-acting tablets, so you can treat all the pets in the household. Fleas can reproduce on untreated pets and allow infestations to persist. Stop your pet's flea infestation dead in its tracks with Capstar.

Quick Relief with One Dose

Treatment of flea infestations in dogs and cats

Easy Oral Delivery

Recommended by veterinarians

No prescription needed

About Capstar

Capstar is a fast-acting, oral flea treatment for dogs and cats that kills adult fleas before they can start an infestation. One tablet kills over 90% of fleas within 4 hours for dogs and 6 hours for cats. Unlike topical treatments, Capstar works from the inside out-- there's no mess, no chance of rubbing off and no need to isolate your pet. Treat the pets in your home with the flea killer that starts working in just 30 minutes. Always read, understand and follow label and use directions.
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Questions & Answers

29 Customer Questions

Can this be used on a dog with Epilepsy?

What is lufenuron
Answer by ChewyApr 24, 2018
Lufenuron is the active ingredient in the veterinary flea control medication. It inhibits the development of insects, so it will kill immature stages of the flea.

I recently treated my dogs and cats with a topical flea treatment. Is this still safe to use
Answer by ChewyNov 14, 2017
This product is safe to use in combination with your monthly topical flea and tick medication.

What is the active ingredient and how much
Answer by ChewyAug 26, 2017
There are 11.4 milligrams of nitenpyram in each tablet.

ReviewsWrite a Review

Rated 3.8981 out of 5 stars
962 Reviews
Would recommend to a friend

962 Customer Reviews

Filter by reviews that mention

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 4 out of 5 stars
By April on Jan 22, 2023

Works great!

Gave to all3 of my dogs. Started working almost instantly, as my dogs began to scratch & roll around on the carpet because the fleas were not very happy. It killed all visible fleas within 12 hours. The only reason I gave 4/5 star is because within a week I had to treat again because they had tiny baby fleas, so the medicine apparently doesn't kill larvae, but once treated again they were all gone. It's been 2 weeks so far & my dogs are flea free! Definitely worth the purchase!

Rated 5 out of 5 stars
By Lockhartgal on Jan 7, 2023

Awesome service

First time ordering from chewy and very pleased order it on Friday night and product arrives the next day before noon. Deft will order more from chewy

Rated 1 out of 5 stars
By JenC on Nov 21, 2022

Don't work

I have used it a few times and came back to it in hopes it would work again. Well I give it to my dogs and waited a couple of hours and flea combed them. There was a lot of live fleas still on my dogs. I will never waste my money on it again.

Rated 5 out of 5 stars
By RGpets29 on Sep 16, 2022

Must use with additional product

For those of you that it doesn't work for, here's some info. Capstar has been around a while and is a great product. In the veterinary field we use it when pets come in and either have a couple of fleas or are infested with fleas. It can be given daily if there is an infestation but you MUST follow up with either a topical treatment or whatever you normally use. If you have an infestation It can take up to 4 months for the life cycle of the flea to completely die off so you MUST continue with monthly flea treatment and vacuum vacuum vacuum. Don't keep your vacuum in the house. Fleas are annoying and take a long time to get rid of. Just a little helpful info for anyone who needs it.

Rated 2 out of 5 stars
By Rolo on Nov 20, 2022

Capstar use

My dog is still scratching He is on the last pill. It does not seem to be working for him. But it worked when he was a pup

Rated 5 out of 5 stars
By regnig on Sep 21, 2022

If you have animals you need this product!

LOVE this stuff since i was first introduced. . . thanks for making it so easy to get for my pets AND to not worry that it is the correct formula too. . . unlike some other site that starts with an A and ends with a z o n!

Rated 1 out of 5 stars
By Joymomma on Sep 7, 2022

Did nothing for my dogs...

I have 2 small breed dogs and these pills did absolutely nothing for our flea issue... I was hoping they would be a good temporary fix.

Rated 1 out of 5 stars
By Doxie on Aug 26, 2022


This product did not work. I have 2 dachshunds that are suffering severely with fleas this year. I now have to try and find a product that will work.

Rated 1 out of 5 stars
By Cathy on Aug 14, 2022

Capstar did not work for my dogs

I purchased two different boxes since I have two dogs- a Rottweiler and a rat terrier. After bathing each dog, I gave them one dose for six days. They still have fleas.

Rated 1 out of 5 stars
By sharie on Aug 6, 2022

Very Disappointed

Bought these in the small dog and large dog size. I'm very disappointed they only worked for about 5 days. My poor dogs. Definitely looking for a different flea treatment.