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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 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
Count
6
12
Sold out
Free shipping on orders over $25
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
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.
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
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.
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.
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.
4.4 Star Rating
Discover why customers choose us
We've collected over 22,538 reviews from shoppers on our website and major retailers.
Lyubov
Oct 26, 2025
Amazing Product – It Really Works!
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July Berry
Aug 26, 2023
5.0 out of 5 stars Easy, works great!
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Tabatha Perez
Apr 25, 2026
Work's!
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Kitty Royse City
Mar 28, 2026
These work for scratching without the mess.
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Sarah Dunham
Oct 2, 2025
Gets rid of the fleas fast!
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Lindsay Gonzales
Sep 13, 2025
BEST FLEA Med for Big Fluffy Cats
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Tabitha
Jun 23, 2025
This stuff works!!
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khalil al-stouhi
May 16, 2025
Make sure to always keep this on hand
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Lindsey
Dec 13, 2024
Works well to get rid of adult flees
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peteygrizz
Nov 9, 2024
Fast and effective
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