# PetArmor CAPACTION (nitenpyram) Oral Flea Treatment for Dogs — Over 25 lbs, 6 Tablets **Brand:** PetArmor **Price:** $31.49 **Rating:** 4.2 · 33,928 reviews **Availability:** In stock ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Dogs - 6 / > 25lbs](https://media.brandclub.com/product-assets/G1Y867JG5/image/1790295281145-cIKDVf56.webp) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Dogs - 6 / > 25lbs](https://media.brandclub.com/product-assets/G1Y867JG5/image/1790295281362-DHehtlUL.webp) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Dogs - 6 / > 25lbs](https://media.brandclub.com/product-assets/G1Y867JG5/image/1790295391759-Oq09WkMZ.jpg) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Dogs - 6 / > 25lbs](https://media.brandclub.com/product-assets/G1Y867JG5/image/1790370536503-ngJZhvLg.jpg) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Dogs - 6 / > 25lbs](https://media.brandclub.com/product-assets/G1Y867JG5/image/1790370536896-mw1y4O3D.jpg) ![PetArmor® CAPACTION® (nitenpyram) Oral Flea Treatment for Dogs - 6 / > 25lbs](https://media.brandclub.com/product-assets/G1Y867JG5/image/1790370537227-Qx63HttA.jpg) Have a question? We're here to help. 4.2 from 33,928 reviews 365K+ sold When fleas show up on your dog, 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 Sized for dogs over 25 lbs, four weeks and older, when used as directed Contains nitenpyram, the same active ingredient found in CAPSTAR Give as often as once a day if fleas return; safe for pregnant or breeding dogs, as directed Easy oral tablet — no messy topical to rub in, and no prescription needed 6 tablets per pack to treat adult fleas that can cause allergy dermatitis Count 6 12 Weight > 25lbs 2-25lbs Free shipping Delivers in 2-3 days 30-day free returns Want to buy in a store? Customer confidence 365K+ recently bought this product Top seller 99% of customers keep this item Low return rate ## What's included 6 tablets ## Ingredients Nitenpyram ## Over 365K+ happy customers It DOES work! Worth every penny. My dog has been infested with fleas. Tried everything, including yard treatments. Buy it! Worth it. Abby A Must Have Flea Product I keep PetArmor CAPACTION oral flea treatment tablets on hand to administer in that situation. None of my dogs have experienced side effects. I highly recommend this product. Mary Rae Fouts Dogs love it! I use this product often because I have 6 dogs. Perfect if a dog has a lot of fleas. Good price, quick delivery and comes with qty 6, so 1 for each of my dogs. Andrew ![A smiling woman kneels on a sunny lawn and pets a content golden retriever lying in the grass beside her, with trees and blue sky behind them.](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1793367985994-KE6SJNG0.jpg) Fast-acting relief ## Fleas gone fast, without the guesswork Fleas can turn up quickly. CAPACTION is an oral tablet that starts killing adult fleas within 30 minutes, so relief begins the same day you notice a problem — no waiting and no mess to rub in. How it works ## One oral tablet that targets adult fleas CAPACTION contains nitenpyram, the same active ingredient as CAPSTAR. You give it by mouth, and it goes to work on the adult fleas already on your dog. It can be given as often as once a day if fleas come back — always use as directed. ![A hand holds out a small round chewable tablet to a fluffy black-and-white Bernedoodle lying on a wood floor and licking its lips.](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1793367898672-nzwFCtZg.jpg) ![A smiling woman kneels on a front walkway lined with blooming flowers and pets a brown labradoodle wearing a leather collar and leash.](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1793367860297-pYsQ6FfQ.jpg) New to flea treatment? ## A simple first choice you can trust If this is your first flea treatment, we kept it straightforward. Choose the option that matches your dog's weight, give one tablet, and know what to expect. Available without a prescription, CAPACTION is an easy way to tackle an active adult-flea problem. ## Trusted by dog owners for fast flea relief Source: Stackline data, September 2026 ## How We Stack Up | | CAPACTION oral tablets | Topical spot-on treatments | Flea collars | | --- | --- | --- | --- | | Start killing the adult fleas on your dog the same day | ✓ | ✓ | ✗ | | Give it by mouth — nothing to rub onto skin or fur | ✓ | ✗ | ✗ | | Match the dose to your dog's weight range | ✓ | ✓ | ✗ | | Buy it without a prescription | ✓ | ✓ | ✓ | | Re-dose as often as once a day if fleas return | ✓ | ✗ | ✗ | | Simple and mess-free for an active flea problem | ✓ | ✗ | ✓ | ## Frequently Asked Questions ### What is PetArmor® CAPACTION® (nitenpyram)? PetArmor® CAPACTION® is an oral flea treatment for dogs. Its active ingredient is nitenpyram, and it kills adult fleas. Choose the dog option that matches your pet's weight and follow the package directions. ### How long does PetArmor® CAPACTION® take to begin working on my dog? It starts killing adult fleas within 30 minutes after an oral dose. It is meant for quick action when you notice fleas on your dog. ### Do I need a prescription to purchase PetArmor® CAPACTION®? No. PetArmor® CAPACTION® for dogs is available without a prescription. If you are unsure which option fits your dog, ask your veterinarian before giving it. ### What types of parasites does PetArmor® CAPACTION® kill? It is a treatment for adult fleas on dogs. For other parasites, choose a treatment labeled for that need and check with your veterinarian. ### Does PetArmor® CAPACTION® treat all flea life stages or only adult fleas? PetArmor® CAPACTION® kills adult fleas. If fleas keep appearing, you may need 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® be used 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 give my dog PetArmor® CAPACTION®? Give the oral tablet by mouth, following the package directions for your dog's weight. If giving tablets is difficult or you are unsure whether a dose was swallowed, ask your veterinarian before giving another. ### How often can I give PetArmor® CAPACTION® to my dog? It can be given as often as once a day when needed for adult fleas, according to the package directions. Choose the option for your dog's weight and do not give more often than the label directs. ### Can I combine PetArmor® CAPACTION® with another flea treatment? If your dog already uses another flea treatment, check both labels and speak with your veterinarian before combining them. The available product information does not establish which combinations are appropriate for your dog. ### Can I use the same PetArmor® CAPACTION® product on my dog and cat? This page features the dog treatment, with options for dogs weighing 2–25 lb and over 25 lb. Do not assume the same package or dose is right for a cat; use a product labeled for your pet's species and weight, and ask your veterinarian if you are unsure. ### What is the shelf life of PetArmor® CAPACTION® oral flea tablets? Check the expiration date printed on your package before use. The available product details do not confirm a fixed shelf life for every package; ask the manufacturer or your veterinarian if the date is missing or unclear. ![A smiling woman kneels on a sunny lawn and pets a content golden retriever lying in the grass beside her, with trees and blue sky behind them.](https://media.brandclub.com/pages-studio/_app/app_petarmor_dtc/assets/1793368254002-wAgoJqw4.jpg?crop=0,0.33231,1,0.93958) ### 4.2 Star Rating ## Discover why customers choose us We've collected over 33,928 reviews from shoppers on our website and major retailers. All Effectiveness Value for money Price Fast acting Alyssa aguilar May 18, 2025 Highly recommend for a temporary solution!! Package came a little bent but I assume that’s because of how flat the box is. Medication kicked in about 30-40 minutes and I immediately started seeing the fleas come off. Not specifically sure how the medication works but to me it very much made the fleas “drunk” to where they would fall off and eventually die.Like I said, temporary fix till I can get my dog to the vet to get him Trifexis. Really enjoyed the popping the drink fleas! Show more Yuri Jun 10, 2024 It works Having just received medication today, I gave it to her around 6pm, and within 30 minutes she started acting crazy. There were fleas running all over her body waiting to come out. She was itching like crazy. As she scratched, dead and alive fleas jumped out. I also helped her get some off with a comb. I got a plastic cup with water and threw about two cups full of fleas into it. As an indoor dog, she only goes out for the restroom occasionally, but she does escape, and that's how she gets fleas, especially from stray cats roaming around our neighborhood. It is hoped that fleas will disappear soon. It must be given to her by a Winnie, the taste she hates. I really hope this helps my poor baby, she's been scratching for days, she's going bald. Brittany franks Aug 27, 2026 Oral flea treatment ! This is the only flea meds I’ll buy for my furry kids. They really work start working within 30 minutes I give them a bath an hour after getting meds. It works wonders. Simple to use. I put it in peanut butter, as my dogs are stubborn. No side affects for my animals and it reduces the fleas by 90%! Very much in love with this brand and very pleased to keep buying ! Bee Aug 3, 2026 Recommend product First time using it and so far I am satisfied with the results. My 1yr 2month husky was filled with fleas and fleas eggs and with her coat was hard to see them. I gave one tablet to my husky and one to my senior pitbull and this stuff started working within 30 minutes no lie. I have added a picture of the fleas I was able to take out while brushing my husky. Adult and small fleas dead. I definitely with buy again & definitely recommend. Honest Reviews Jul 29, 2026 Helped Reduce My Puppy’s Itching I tried PetArmor CapAction on my puppy, who weighs about 2–3 lbs, and overall I’m happy with the results. My puppy had been itching quite a bit, and after giving this, I noticed she wasn’t scratching nearly as much as she was before.I didn’t see any ticks fall off, so I can’t speak to that, but it seemed to help with the flea-related itching we were dealing with. My puppy did not want to take the tablet by itself, so I’m not sure if it has a taste or smell that dogs don’t like. However, placing it inside a small piece of meat worked perfectly and she took it without a problem.It was easy to give, and I like that it starts working quickly. I would recommend this for pet owners looking for an oral flea treatment option, especially if your dog is picky about taking medication. Jamie A. Arellano Jul 22, 2026 Fast Results We noticed fleas fell off after about 25. Works great Patricia S. Apr 28, 2026 Works better than capstar. I gave my Blue heeler one of these capsules in the next day every flea was gone. She stays in a half acre pen with a dog house inside the barn and we put cedar shavings down along with diametric Earth. We also put the diatometric Earth on the dog. You can purchase that from Tractor supply company. They can even eat it. It keeps ticks flies and bugs away and it's great for gardeners and yards. Sep 9, 2025 A Must Have Flea Product For Fleas Between Regular Monthly Flea Medication Doses! Fleas are bad all year round here in the San Francisco Bay Area. We have always used a monthly dose of flea preventative on all of our dogs. In spite of that, we occasionally see live fleas between doses.I keep PetArmor CAPACTION oral flea treatment tablets on hand to administer in that situation. Tablets are easy to wrap in some creamy peanut butter and give to the dog. The flea treatment starts killing fleas within 30 minutes, and continues for about 24 yours. It is easy to see the treatment is working, as my dogs are always quickly more comfortable.Note: Flea eggs on your dog are not killed by this treatment, only live fleas. I would not recommend this as your only flea preventative for your dog, but rather an extra treatment when needed.None of my dogs have experienced side effects. I highly recommend this product. Andrea Sep 1, 2025 Dogs love it! Starts working in 30 minutes I use this product often because I have 6 dogs. It works great to get rid of adult fleas. Starts working within 30 minutes and lasts up to 24 hours. Perfect if a dog has alot of fleas. After one pill I wait a day and apply monthly products. Good price, quick delivery and comes with qty 6, so 1 for each of my dogs. See more reviews ### Ways to buy PetArmor View