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

**Brand:** PetArmor
**Price:** $31.49
**Rating:** 4.4 · 22,538 reviews
**Availability:** Out of stock

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4.4 from 22,538 reviews

248K+ sold

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

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 giving one oral tablet

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

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

Uses nitenpyram, the same active ingredient as CAPSTAR, available without a prescription

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

Count

6

12

Sold out

Free shipping on orders over $25

Delivers in 2-3 days

30-day free returns

Want to buy in a store?

Customer confidence

248K+ recently bought this product

Top seller

99.1% of customers keep this item

Low return rate

6 tablets

Nitenpyram

## 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.](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1790292351761-VzkKC5lG.png)

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.](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1790292347322-Z6KqzSyY.png)

![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.](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1790292938918-mBNyOTL2.png)

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.

# 84%

Would recommend to a friend or family member¹

# 5 Million

Trusted by over 5 million pets annually²

Source: (1) Stackline, (2) Numerator Panel, data on file

## 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

## 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.

PetArmor® CAPACTION® (nitenpyram) starts killing fleas within 30 minutes to give your pet quick relief. One oral tablet kills 90% of fleas within 6 hours on cats.

No, PetArmor® CAPACTION® (nitenpyram) is available online and at retail outlets without a prescription.

PetArmor® CAPACTION® (nitenpyram) kills adult fleas. Its active ingredient, nitenpyram, starts killing fleas in just 30 minutes.

PetArmor® CAPACTION® kills adult fleas. If fleas keep appearing, pair it with a broader flea-control plan for your pet and home. For ongoing protection on your dog, try PetArmor® Plus Flea & Tick Topical or the PetArmor® Extend™ Flea & Tick Collar. To tackle fleas where they live outdoors, use PetArmor® Home Yard Spray.

It treats an existing adult-flea problem and can be given daily as needed, following the label. For ongoing prevention, use a longer-lasting option like PetArmor® Plus Flea & Tick Topical  or the PetArmor® Extend™ Flea & Tick Collar.

PetArmor® CAPACTION® (nitenpyram) is available as an oral flea tablet. Place the pill directly in your pet’s mouth or hide it in food. If you hide it 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.

A single dose of PetArmor® CAPACTION® (nitenpyram) should kill the adult fleas on your pet. If your pet gets reinfested with fleas, you can safely give another dose as often as once a day.

If you are currently using a monthly flea preventive and it fails, you may administer PetArmor® CAPACTION® (nitenpyram) daily, as needed, for quick relief against a flea infestation. PetArmor® CAPACTION® (nitenpyram) may also be used with flea shampoos, heartworm preventives, antibiotics, vaccines, and deworming medications.

Yes. You may administer PetArmor® CAPACTION® (nitenpyram) for Small Dogs, 11.4 mg or PetArmor® CAPACTION® (nitenpyram) for Cats, 11.4 mg to dogs, puppies, cats, and kittens 4 weeks of age and older, 2-25 pounds of body weight. PetArmor® CAPACTION® (nitenpyram) tablets should be administered according to the dosing schedule on the label. Weigh your pet before administration to ensure the proper dosing. Do not give PetArmor® CAPACTION® (nitenpyram) for Large Dogs over 25 pounds, 57.0 mg, to small dogs or cats.

PetArmor® CAPACTION® (nitenpyram) oral flea tablets expire after 3 years from the date of manufacture.

![A man plays with an orange tabby in a sunlit loft living room while a cat bed rests nearby.](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1790292347156-EUo8DbAg.png)

### 4.4 Star Rating

## Discover why customers choose us

We've collected over 22,538 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! 🐾

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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.

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.

Lindsay Gonzales

Sep 13, 2025

BEST FLEA Med for Big Fluffy Cats

Highly recommend this product for fleas on your cat. Worked within 30 minutes and the next day my Norwegian Forest cat was flea free after fighting it for months. I put a pill in his food and he laid down and they all fell off, so make sure you let them sleep on a table or in the bathroom and all I needed was to wipe the dead fleas up. There were no active fleas left on my cat. I’m so thankful my cat can heal now.

Jun 23, 2025

This stuff works! Our baby is an outdoor kitty and he got fleas really bad the past 2 months. One dose of this made an amazing difference. It killed literally almost all of the fleas on him. I only found 1 moving when I did a comb check! Our little guy didn’t have any kind of adverse reaction ( I was hesitant and monitored him for a few hours after dosing). He was really affectionate and happy to have his fleas gone 🙂👍🏼 I’ve attached a pic of our happy kitty for reference 😂🖤

May 16, 2025

I have never written a review on any product that I’ve bought, but I knew I had to write a review about this. I live in the woods and have recently started letting my cats go outside. I had started itching on my stomach and under my arms, at first, I thought it was mosquito bites since it is the season. Then I looked at my stomach and it turned out to be flea bites. Then my mom came up to me and showed me her back and asked if this was eczema, I told her no it was flea bites. I usually use a topical medication every month for my cats, but it just wasn’t cutting it. I ended up getting a spray and I sprayed them and I also got them a flea collar. I didn’t know for sure if the fleas had died until I gave them this medication. My mom came up to me and told me to look on the couch, fleas had fallen off. 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.

Lindsey

Dec 13, 2024

Works well to get rid of adult flees

This product worked very well to get rid of adult flees. However, even after washing and using a flee comb, the flees came back. As stated on the box, it doesn’t work on eggs. My advice is to use a combination of topical formula in addition to the pills. They are small enough to administer. I stuck it in a piece of turkey and my cat ate it without incident. The flees were falling off within an hour. It didn’t have any adverse effects on my cat. Unfortunately, even after vacuuming and washing bedding, the flees did come back.

peteygrizz

Nov 9, 2024

Fast and effective

My cat Rascal started acting strange, she was staring at the carpets and then started to avoid walking on rugs and was sleeping in closets all day, along with excessive scratching and chewing her fur. I finally realized she had fleas, which after 14 years of indoor/outdoor access has never once had, even when other pets did. One of my previous cats had a severe and fatal reaction to the common topical treatment so I was looking for a better option.This nitenpyram worked exactly as described. First it was easy to dispense as she readily ate her food with the pill concealed within. She didn’t even notice. It started working within 20 minutes as she was going nuts as the fleas panicked and after a few hours she calmed down. The photo is her sleeping soundly for the first time in several days. The relief it brought her was immense as she was suffering badly from the bites.I especially appreciate the safety factor since I lost a cat to another flea medication and was very nervous about using anything again. So glad to have my kitty happy again.

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