# PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats — 6 Tablets, 2–25 lbs **Brand:** PetArmor **Price:** $31.49 **Rating:** 4.4 · 23,829 reviews **Availability:** In stock ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/product-assets/58N56QEJ3/image/1790291399142-PN69T3li.webp) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/product-assets/58N56QEJ3/image/1790291399426-Lfj8i8PW.webp) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/product-assets/58N56QEJ3/image/1790291399631-u3KHcD5y.webp) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/product-assets/58N56QEJ3/image/1790291399841-WPS1R4oH.webp) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1791483667111-YSneKSet.png) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1791483693114-HEy2XTiI.jpeg) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1791483740965-l7SWECS3.png) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1791483763987-kXeIriUT.png) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1791407333347-s9BWM2P6.png) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Cats - 6 / 2-25lbs](https://media.brandclub.com/product-assets/58N56QEJ3/image/1790291400109-pKDxaoF3.webp) Have a question? We're here to help. 4.4 from 23,829 reviews 248K+ sold 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 Free shipping 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 ## What's included 6 tablets ## Ingredients 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. ## Protecting pets for over 15 years 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 | ✓ | ✓ | ✓ | ✗ | ## Frequently asked questions ### What is PetArmor® CAPACTION® (nitenpyram)? PetArmor® CAPACTION® (nitenpyram) is a fast-acting oral flea treatment for dogs and cats that kills adult fleas before they can start an infestation. ### How long does it take PetArmor® CAPACTION® (nitenpyram) to begin working on my cat? 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. ### Do I need a prescription to purchase PetArmor® CAPACTION® (nitenpyram)? No, PetArmor® CAPACTION® (nitenpyram) is available online and at retail outlets without a prescription. ### What types of parasites does PetArmor® CAPACTION® (nitenpyram) kill? PetArmor® CAPACTION® (nitenpyram) kills adult fleas. Its active ingredient, nitenpyram, starts killing fleas in just 30 minutes. ### Does PetArmor® CAPACTION® (nitenpyram) kill fleas in all life stages or just the fleas I see? 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. ### Can PetArmor® CAPACTION® (nitenpyram) act as a preventive flea treatment? 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. ### What is the best way to administer PetArmor® CAPACTION® (nitenpyram)? 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. ### How often can I administer PetArmor® CAPACTION® (nitenpyram) to my pet? 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. ### Can I combine PetArmor® CAPACTION® (nitenpyram) with another flea treatment? 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. ### Can I use the same product on my dog and cat? 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. ### What is the shelf life for PetArmor® CAPACTION® (nitenpyram) oral flea tablets? 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 23,829 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! 🐾 Show more 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 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. See more reviews ### Ways to buy PetArmor View