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

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About This Item

Details

  • Capstar (nitenpyram) starts killing adult fleas in just 30 minutes.
  • With one dose, you can see the dead fleas falling off of your furry friend.
  • If your kitty gets reinfested with fleas, simply give her another dose—you can treat her as often as once a day.
  • This oral flea treatment is a fast, effective way to help your four-legged family member get rid of fleas, and it’s available without a prescription.
  • Capstar Oral Flea Treatment for Cats (11.4 mg) is designed specifically for adult kitties and kittens four weeks and older who weigh 2-25 pounds.

Ingredients

Instructions

FAQ

Learn More About Capstar From Our Team of Experts

Capstar (nitenpyram) Flea Treatment

Fleas act fast—in just 24 to 48 hours, fleas can start laying eggs and quickly become a nightmare. Capstar begins killing fleas in just 30 minutes with a single dose. Watch them fall fast with Capstar and stop an infestation dead in its tracks.

No Rx Needed

Capstar is available over the counter, making it easy and convenient to provide fast relief for your pet whenever you need it. Capstar can be used daily, as needed, to help treat and control an existing flea infestation.

Fast-Acting & Convenient Tablet

A single dose of Capstar starts killing adult fleas within 30 minutes. Just one tablet kills over 90% of fleas within 4 hours for dogs and 6 hours for cats. It’s easy to use, too— just place it directly in your pet’s mouth or hide it in food.

Facing an Active Flea Infestation?

Follow these 3 steps:

  1. Treat your pet with Capstar as often as once a day.
  2. Treat your home with cleaning and indoor environmental treatments.
  3. Treat your yard with flea and tick spray for outdoor use.

About Capstar

Get back to normal with Capstar (nitenpyram) and make flea treatment as simple and stress-free as possible. Explore the whole range of flea treatment products from Capstar, available in various sizes for both dogs and cats.

Shop Capstar

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Questions & Answers

43 Customer Questions

can you administer this pill and also being using a topical flea product as well ?

Answer by Chewy • Sep 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.

can you cut the pill in half for smaller cats?

Answer by Chewy • Sep 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.

How many tablets per order?

Answer by Chewy • Dec 24, 2019
The Capstar Flea Tablets for Cats 2-25 lbs, 6 count includes 6 tablets.

Is it normal for my cat to get dehydrated after consuming the pill?

Answer by Chewy • Aug 01, 2019
Being dehydrated typically isn't a normal side effect and we recommend you consult with a vet.
Reviews
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4.4
Rated 4.4 out of 5 stars
4047 Ratings
Terms & Conditions

Customers Mention

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

Ease of Use

83% Positive

Effectiveness

83% Positive

Ingredients

83% Positive

Long-Term Benefits

84% Positive

1837 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 Sue on Dec 16, 2025

Used for Lionhead buns with lots of fur

Half hour after getting the Capstar tabs into two lionheads and a Holland lop, dead fleas covered the pee pad in my lap. The bunnies had no bad reaction. The only

Half hour after getting the Capstar tabs into two lionheads and a Holland lop, dead fleas covered the pee pad in my lap. The bunnies had no bad reaction. The only problem was getting them to swallow the tabs and not spit them out... Not easy. Finally used a Popsicle stick with a crystallized raw honey ball on the end in which I pushed the small tab inside. Then carefully inserted in the side of their mouth and pushed in without hurting them. One took it easy. Even chewed it up. Another after a couple of times pushing back in with the stick swallowed it. The third it took ten minutes, more honey and alot of patience. So if you can get the small white tab in them, it works. It could be crushed in juice then given by syringe. These tabs are too expensive to be spit out and lose at $10 a pop but they do work well on buns. Also used on two Doodles... One 15 lbs and one 21 lbs. Worked okay on them but not quite as fast and complete. The problem is it kills the adult fleas fast but not the eggs and it only lasts 24 to 48 hours. So need to keep diligent and keep on using til every flea gone. Can take months. I added diatomaceous earth after giving them the Capstar tabs powdering them up with DE. This will kill new young fleas but the powdering needs to be done daily.

Rated 3 out of 5 stars
By Jessica on Dec 1, 2025

Worked but she won't eat it

I bought this for a stray that was covered in fleas. I managed to put it in her food because I can't get her and it worked. However I think this has some sort of

I bought this for a stray that was covered in fleas. I managed to put it in her food because I can't get her and it worked. However I think this has some sort of foul taste or smell or something because after the second dose she stopped eating her food completely. She either eats a little bit or none at all and will not touch the food all day until I change it but with the last 4 doses it seems like she could smell it because she again refused her food. I give it 3 because it did work when she did take it. The fleas dropped off and died but after that and not eating the medicine she now has lots of fleas again.

Rated 5 out of 5 stars
By Jennifer on Dec 16, 2025

Does what it claims!

I mean I had literally tried so many things guaranteed natural remedies other flea sprays etc and nothing would work I even got flea collars and they didn't work!

I mean I had literally tried so many things guaranteed natural remedies other flea sprays etc and nothing would work I even got flea collars and they didn't work! Like within 20 minutes fleas start falling off of them. By the next day they had stopped scratching and within a day or two all of the bite scabs had healed! This product is truly a godsend and I will purchase it in the future for such issues!

Rated 2 out of 5 stars
By TordIsBored on Nov 27, 2025

Customer service sucked

The pills themselves might be working?? Its hard to tell. I only got 6 tablets instead of the 12 that I ordered, reached out to customer service and they didn't

The pills themselves might be working?? Its hard to tell. I only got 6 tablets instead of the 12 that I ordered, reached out to customer service and they didn't do anything about it unless I sent the entire thing back after I have given my pets their first dose. They came in two separate 6 packs they could've just sent me another. Im really disappointed in chewys flea products. Been buying different ones for months and still haven't been able to get rid of them on my boys. :(

Rated 5 out of 5 stars
By Brianna on Nov 8, 2025

Good pill

This is the only medication I’ve used that I’ve seen actually kill fleas. I received this today, two days after ordering it; I love that Chewy is quick with shipping!

This is the only medication I’ve used that I’ve seen actually kill fleas. I received this today, two days after ordering it; I love that Chewy is quick with shipping! I gave Ayla a pill after opening the package, fed her a treat and some food, then she laid down on the bed to take a nap. Thankfully my bedsheets aren’t black or else I wouldn’t have noticed, but when she got up there were dying fleas where she had been laying. Even after 3 hours I was still finding dying fleas or fleas fleeing from her fur onto my bedsheets. I do see there being some downside to using this as it won’t instantly kill all the fleas. They jump off of your pets body and could easily infest your home. I’ve dealt with a really bad flea infestation before, so I know I have to be around to kill the escaping fleas and get rid of them for good. I will give her another pill in two days and then give her a bath the day after the second pill. Capstar has been the only flea medication that has worked for me and is pretty affordable. I’ve given Bravecto by two different vets before and it did nothing. I recommend Capstar over Bravecto!

Rated 5 out of 5 stars
By Ellen on Dec 16, 2025

Finally an Oral Flea Med NO Prescription

2 neglected cats figured I was a better human to manipulate and they came with lots and lots of fleas poor babies. They were suffering and these got rid of the fleas

2 neglected cats figured I was a better human to manipulate and they came with lots and lots of fleas poor babies. They were suffering and these got rid of the fleas so they can heal. Way more effective than topical control. Great for people living in areas with limited vet access like me. Worked; tiny pill.

Rated 5 out of 5 stars
By Lisa on Dec 9, 2025

Shipping and Delivery were Excellent

My poor cat was suffering with fleas. I needed a solution fast. I order this product and received it with 4 days. The product is excellent for killing adult fleas

My poor cat was suffering with fleas. I needed a solution fast. I order this product and received it with 4 days. The product is excellent for killing adult fleas and giving your pet instant relief. It's great as an additional treatment to use with the topical treatment. My cat, who is aging and underweight tolerated both treatments well.

Rated 5 out of 5 stars
By Robin on Jan 15, 2026

Kills fleas fast

This is a great product. It truly starts working in an hour or less. I wish it lasted longer, but it works quick. I wish it came in liquid form, cats don't like

This is a great product. It truly starts working in an hour or less. I wish it lasted longer, but it works quick. I wish it came in liquid form, cats don't like pills much. Overall, Great product.

Rated 5 out of 5 stars
By Sherri on Jan 6, 2026

Must have litter box!!

This is the best litter box that I have ever purchased. I have always had cats my entire life. You can not go wrong with this one is big enough for large cats and

This is the best litter box that I have ever purchased. I have always had cats my entire life. You can not go wrong with this one is big enough for large cats and cats can’t pee off the sides like most litter boxes.

Rated 5 out of 5 stars
By VANESSA on Dec 29, 2025

Works great

I have a cat who does NOT like to be touched so getting him flea treatment is quite challenging to say the least! I crush one of these up and put it in his lickable

I have a cat who does NOT like to be touched so getting him flea treatment is quite challenging to say the least! I crush one of these up and put it in his lickable treats every few days for his flea treatment It really helps,!