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

Capstar Flea Oral Treatment for Cats, 2-25 lbs

By Capstar
Rated 4.0819 out of 5 stars

$38.45Chewy Price
$44.99Chewy Price
$36.53Autoship Price
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About This Item


  • Kills adult fleas to help prevent infestations on cats and kittens weighing between 2-25 pounds.
  • Capstar is formulated to start killing fleas within just 30 minutes to help give felines fast-acting relief.
  • This treatment can also help quickly treat flea infestations.
  • Capstar can be given to your cat companion as often as once a day.
  • Easy-to-give tablets are mess-free and odor-free, unlike some topical solutions.

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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 was previously sold as Capstar Flea Treatment for Dogs & Cats. Dog parents, Capstar for Dogs is now available—it's the same great results in a brand new package.

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

35 Customer Questions

can you administer this pill and also being using a topical flea product as well ?
Answer by ChewySep 11, 2019
If you are currently administering a monthly flea infestation preventive and your pet still gets fleas, you may administer Capstar treatments daily, as needed, for quick relief against a flea infestation. Capstar may also be used with flea shampoos, as well as heartworm preventives, antibiotics, vaccines and de-worming medications.

How many tablets per order?
Answer by ChewyDec 24, 2019
The Capstar Flea Tablets for Cats 2-25 lbs, 6 count includes 6 tablets.

can you cut the pill in half for smaller cats?
Answer by ChewySep 01, 2021
This treatment comes in tablet form and measures approximately 6 millimeter in diameter and 1 millimeter thick (see attached for reference). It is suitable for cats 2 pounds or greater and 4 weeks of age and older. While it is possible to crush or cut this treatment in half the full dose should be given.

Is it normal for my cat to get dehydrated after consuming the pill?
Answer by ChewyAug 01, 2019
Being dehydrated typically isn't a normal side effect and we recommend you consult with a vet.

ReviewsWrite a Review

Rated 4.0819 out of 5 stars
720 Reviews
Would recommend to a friend

720 Customer Reviews

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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 cat57 on Mar 4, 2023

Capstar worked great!

We had a flea infestation. We started out with capstar for the cats to knock the fleas down on them and spraying the house room by room (making sure we followed all directions of keeping cats out until completely dry). Then we applied a topical we got from the Vet. Capstar did a Great job of killing the fleas quickly and giving them some comfort.

Rated 5 out of 5 stars
By Maggierose on Mar 12, 2023

Solved my problem

I was looking for something to give the strays that I feed to protect them from flees and ticks and to keep them forming bring them to my door.These strays are wild and they will not be touched. With this product I am able to turn it into a powder and mix it in their food. Problem solved.

Rated 2 out of 5 stars
By WileysMom on Feb 16, 2023

Killed Fleas, but...

Used this on 2 cats (ages 3 and 14 years). It did indeed kill the fleas, but both cats were completely miserable for about two days, licking themselves endlessly. One cat's mouth became swollen and red. They seemed more tormented by itching after the pill than before I gave it to them. Not sure I'll use it again.

Rated 5 out of 5 stars
By Nicky on Feb 13, 2023

Thanks Chewy

Chewy recommended this flea medicine for my five indoor 'fur kid cat's. I bought a flea medicine that didn't work. Capstar was amazing. I waited a while & flea combed them & the fleas were gone.its been about a week & no flea's!! Thanks Chewy!!

Rated 5 out of 5 stars
By Sydney on Mar 10, 2023

Amazing Product

This worked so well for us cleared the fleas up immediately We couldnt find any fleas on him after the first day and the scratching cleared up after the second

Rated 5 out of 5 stars
By Sassy on Jan 14, 2023

get the fleas OUT!

This is an excellent product, when used with other necessary steps to oust fleas for inside your house! My cat is inside only. She got the worst case of fleas when the temperature dropped this year. I have trust in Chewy for providing the tools to eradicate the pests. Thank you for you time

Rated 5 out of 5 stars
By Kala on Jan 21, 2023

Capstar or oral

It's Really works!! My cat had been flea and i use so many stuff and spend money too, but didn't get it off but now, completely gone! Because of this. I would like to buy this again if same happen on her again also flea shampoo as well.

Rated 5 out of 5 stars
By Catlover on Jan 25, 2023

Capstar Oral Flea killer

This flea treatment works great! I take a spoon and grind the tablet into a powder and then mix with a small amount of pate. The cats gobble it down. They stop scratching within a day. You still need to apply a topical like Frontline or Advantage monthly for continuous protection against the fleas.

Rated 5 out of 5 stars
By JennF on Jan 11, 2023

Incredibly fast delivery

I can't use topical flea treatments on one of my cats and this oral treatment has been hard to find lately. I ordered it one evening online from Chewy and it was delivered before 10am the next day. You simply can't beat that!!

Rated 5 out of 5 stars
By Kevin on Dec 25, 2022

Good stuff

I have four newborn kittens and they suddenly somehow got fleas about a week after they were born, putting the mama on Capstar was the best choice I ever made, the fleas were gone completely after two doses, and I still have four doses left in case I need it in the future