PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs

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4.4 from 23,809 reviews

248K+ sold

PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats — 6 Tablets, 2–25 lbs

Name: PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs
Brand: PetArmor
SKU: 58N56QEJ3
Price: 31.49 USD
Availability: InStock
Rating: 4.39 (23809 reviews)

When fleas show up on your cat, this oral tablet gets to work fast — it starts killing adult fleas within 30 minutes. Available without a prescription and offered in weight-based options, CAPACTION is a simple first step for new flea-treatment buyers.

$31.49

Key Features

•

Starts killing adult fleas within 30 minutes of a single oral dose

•

Safe for kittens and cats 2–25 lbs and 4 weeks or older, when used as directed

•

Nonprescription oral tablet — no messy topical and no rub-off to worry about

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If fleas return, give another dose as often as once a day, even to pregnant or breeding cats

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Contains nitenpyram, the same active ingredient found in CAPSTAR

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Includes 6 doses to kill adult fleas that can trigger flea allergy dermatitis

Free shipping

Delivers in 2-3 days

30-day free returns

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Customer confidence

248K+ recently bought this product

Top seller

99.1% of customers keep this item

Low return rate

Over 248K+ happy customers

Works!

I gave this product 5 stars because it truly works! PetArmor CapAction started killing fleas very quickly after I gave it to my pet.

Tabatha Perez

This stuff works!!

From the start, the difference was amazing. He's so much more comfortable now.

Tabitha

Make sure to always keep this on hand

I was very surprised with how fast the results were. I will always make sure to have this medication on hand, and I plan on buying more.

khalil al-stouhi

A cat owner checks her Siamese cat with a flea comb while a treatment box rests on the kitchen counter.

Fleas gone fast

A clear first step when fleas show up

Spotting fleas on your cat for the first time is stressful, and it is hard to know what to reach for. CAPACTION® keeps it simple: one oral tablet that starts killing adult fleas within 30 minutes, so you can take action the moment you notice a problem.

No prescription needed

Fast relief, available over the counter

You should not have to wait for a vet appointment to get fleas off your cat. CAPACTION® is available without a prescription and uses nitenpyram, the same active ingredient as CAPSTAR®, so you get a trusted, fast-acting treatment on your own timeline.

A tabby watches as its owner organizes newly purchased cat-care supplies in a home entryway.

A person with short curly red hair, wearing a green sweater and white pants, sits beside and pets a fluffy blue-eyed kitten on a cushioned bench in a sunlit bedroom, with a brush resting on folded blankets nearby.

Made for cats and kittens

Gentle enough for kittens 4 weeks and older

CAPACTION® is made for cats and kittens 2–25 lbs and 4 weeks and older, when used as directed, and can even be given to pregnant or breeding cats. If fleas come back, you can give another dose as often as once a day.

Protecting pets for over 15 years

Advocacy

84%

Of customers have recommended us to a friend or family member.

Satisfaction

75%

Of customers gave us positive customer satisfaction scores.

Source: Stackline data, September 2026

How We Stack Up

PetArmor® CAPACTION®

Topical spot-on drops

Prescription flea pills

No treatment yet

Bring fast relief when your cat has fleas right now

Get it without a vet visit or prescription

Give as an easy oral tablet, no messy topical

Dose again as often as once a day if fleas return

Suitable for eligible kittens and cats, when used as directed

Keep spare doses ready for the next flare-up

A black cat sits behind a sealed flea-treatment box and flea comb on a living-room side table.

Relief that starts in minutes

One oral tablet starts killing adult fleas within 30 minutes, so you do not have to watch your cat suffer while a slower treatment kicks in.

A calico mother cat rests with three sleeping kittens in a softly lit nesting bed.

Reassurance built in

Made for kittens and cats 2–25 lbs and 4 weeks and older, when used as directed, and even suitable for pregnant or breeding cats. No prescription required.

A gray tabby cat looks up beside a bowl of food and a basket holding PetArmor® CAPACTION® cat flea treatment.

Simple to give, easy to repeat

Skip the greasy topical and the rub-off worries. It is an oral tablet you can give at home, and you can dose again as often as once a day if fleas return.

Frequently asked questions

PetArmor® CAPACTION® (nitenpyram) is a fast-acting oral flea treatment for dogs and cats that kills adult fleas before they can start an infestation.

A man plays with an orange tabby in a sunlit loft living room while a cat bed rests nearby.

4.4 Star Rating

Discover why customers choose us

We've collected over 23,809 reviews from shoppers on our website and major retailers.

All

Effectiveness

Value for money

Fast acting

Price

Lyubov

Oct 26, 2025

Amazing Product – It Really Works!

Amazing Product – It Really Works!Wow, I never knew they even had this kind of medicine pill for flea!My cat is a Scottish Fold ( high-maintenance breed), so I was really nervous to try any medicine. I didn’t know if it would work for him or if it might make him sick. But I decided to give it a try and honestly, I’m amazed!I gave him one pill just like the instructions said, and in about 30 minutes the flea started jumping out. I was shocked! I even took pictures because I couldn’t believe how many came off. I had no idea he had that many!My cat is an indoor cat and only went outside a couple of times, and that’s probably how he got them. This pill worked so fast and so well. I’ll check again tomorrow to see if he needs another dose, but so far it’s perfect.If your cat has flea— don’t even think twice. Just buy it! You’ll love it. It’s super effective, easy to use, and my cat is totally fine after taking it. Highly recommend! 🐾

July Berry

Aug 26, 2023

5.0 out of 5 stars Easy, works great!

I have a stray/feral cat that has mange. I started him on a mange relief treatment first to help with the scratching, crushed it and put in wet food. About 4 days later I have him one of these and it worked perfectly. I give him one once a month the past 3 months, and so far between the 2 treatments the condition is improving very well, it will definitely take time dealing with mange. The sores were pretty severe so it will take several months to fully heal. But in 2 months you can definitely see the difference, like a new cat.

Crystal Marshall

Jun 29, 2026

Happy Pill

Happy kittys for sure, this is the magic pill hands down. Follow up with the topical drops after 24 hour's then vaccum every room in your house. Make sure to wash all bedding as well in hot water and your kitty will thank you for getting rid of those nasty fleas.

Edwin serna

Oct 24, 2026

Great Flea Treatment for Cats! ⭐⭐⭐⭐⭐

The product arrived in good condition, and the packaging is clear and easy to understand. I like that it comes with six tablets and is designed to start working quickly against fleas. The tablets are convenient to store, and the instructions are straightforward. A practical option for cat owners looking for an oral flea treatment!

Molly

Sep 20, 2026

Easy to apply, effective medicine

Our favorite medicine for our Russian blue. He knows it helps. We put it on the back of his neck, there is little to no smell and an incredible reduction of fleas. He is an outdoor cat so it can get tough but this medicine is worth every penny. Does not irritate his skin at all, he just doesn’t like the feeling of his wet fur. But this keeps him healthy and ready to tackle any wild mouse without bringing back a nest.

Briana Montgomery

Jul 8, 2026

Definitely Purchase

Works exactly as promised. No noticeable fleas and even the tiny ticks that are impossible tp get at fell off after the first day . Works better then advertised actually! Definitely recommend because all other name brand flea and tick products are not working as good as they used to. Also comes with a good amount for those who have multiple pets . Also no prescription needed. So no headache

Keisha

Jun 2, 2026

Works for us

As a cat owner of 1.5 years. I've done the flea shampoo baths, but this pill is immediate relief for my 1.5 year old cat. She is strictly indoor but has door contact with friendly cats & dogs (carrying fleas). For one week I've watched her scratch, jump, tumble for relief. IVE tried to trick her before w other flea pills, but this one seems to work best. But I literally forced her to swallow it and we are both at peace. NO MORE ExCESSIVE SCRATCHING, she's literally on chil. Initially she ran around upset b/c I forced the pill about 45 min later she calmed, would not move, just stared at me! then about 3 hrs later she came to me in peace. NO MORE SCRATCHING

Tabatha Perez

Apr 25, 2026

Work's!

I gave this product 5 stars because it truly works! PetArmor CapAction started killing fleas very quickly after I gave it to my pet. Within a few hours, I could already see a big difference. It’s easy to use, and I love that it doesn’t leave any mess like topical treatments. My pet felt much more comfortable and stopped scratching so much. Definitely a great option if you need fast and effective flea control. I would absolutely buy it again!

Kitty Royse City

Mar 28, 2026

These work for scratching without the mess.

No smell, oiliness or risk of skin irritation like some vial-type applications! We have been buying these tablets for years and they help! Our indoor/outdoor cats stop scratching after an hour or two. The only side effects are increased scratching after 30 minutes of administering and lasting an hour or two. The value is worth the comfort and health risks of what fleas can cause. One cat is difficult to give pills to while the other is fairly easy. It just depends on your pet. Lasts for a month.

Sarah Dunham

Oct 2, 2025

Gets rid of the fleas fast!

I've been fighting fleas on the cats all summer. We don't have carpet and all their bedding is washed regularly. Bravecto and flea baths weren't cutting it. I got this on a whim and gave it to the cat with the worst problems and the next day there was notable improvement. If I did catch a flea on her it was either already dead or slow and easy to crush. Best thing is, if you get a new hatch out, you can dose them again!I gave it to the rest of the cats last night so hopefully this will be the end to the flea problem.

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