PetArmor CapAction Oral Flea Treatment for Dogs 2-25lbs 6 doses

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About This Item

Details

  • Starts working within 30 minutes to help kill fleas fast!
  • Achieves greater than 90% effectiveness against adult fleas on dogs within 4 hours.
  • Comes in a convenient oral tablet.
  • Contains the same active ingredients as CAPSTAR (nitenpyram).
  • Specially formulated for dogs who weigh 2 to 25 pounds.

Ingredients

Instructions

Learn More About PetArmor From Our Team of Experts

Take Action with CapAction

Fleas can be a nightmare—but with CapAction, they don’t have to be. CapAction (nitenpyram) begins killing fleas in just 30 minutes with a single tablet. Just one oral dose stops an infestation right in its tracks.

Starts Killing Fleas in Just 30 Minutes

When it comes to fleas, every minute counts. This fast-acting formula begins working within 30 minutes, so your pet can be free of fleas as soon as possible.

No Rx Needed

CapAction comes in formulations for both dogs and cats, yet no prescription is needed. One dose of CapAction is all it takes to kill the adult fleas on your pet. If those pesky fleas come back and re-infest your pet, don’t worry—CapAction can be safely administered once a day to keep your pet flea-free.

Breaking the Flea Life Cycle

Be patient—it can take months to get rid of a flea infestation, but CapAction is here to help. Here’s how to do it:

1. Treat Your Pets: You can safely administer CapAction as often as once a day to kill adult fleas—treat all your pets to avoid reinfestation.

2. Treat Your Home: Household sprays, powders, and foggers can help kill the fleas hiding in your home.

3. Treat Your Yard: Flea and tick yard sprays will help kill outdoor fleas at the source, so your pet won’t keep bringing them in.

About PetArmor

At PetArmor, protecting your pet is the most important goal. PetArmor is committed to providing pets with quality flea and tick solutions that are effective and easy to use. PetArmor products help keep your pet happy, healthy, and active—without the stress of pests.

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Questions & Answers

3 Customer Questions

Is this a flavored chew or do I have to put it in something to get my dog to eat it?

Answer by Chewy • Oct 21, 2025
This chew is not flavored.

Can it be used for prevention of fleas?

Answer by Chewy • Apr 07, 2025
This treatment can be used daily, as needed, to help treat and control an existing flea infestation. A monthly flea preventive is recommended for long-term prevention.

Can I use this for an 8 week old puppy?

Answer by Chewy • Apr 20, 2025
PetArmor flea treatments for dogs are suitable for dogs 4 weeks of age and older.
Reviews
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4.0
Rated 4 out of 5 stars
270 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

66% Positive

Effectiveness

64% Positive

Ingredients

68% Positive

Long-Term Benefits

64% Positive

102 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 3 out of 5 stars
By Angela on Nov 9, 2025

hyperactive

i gave lucy one pill while i’m waiting for that to kick in i took molly a bath. lucy is about a year old so i wasn’t to nervous about the side effects but OMG he

i gave lucy one pill while i’m waiting for that to kick in i took molly a bath. lucy is about a year old so i wasn’t to nervous about the side effects but OMG he was going nuts running and jumping panting heart racing. i sat with molly combing her hair blowing drying her. after i was done with molly i tried to get lucy so i can comb her she would not sit still, she always does she sleeps while i comb her so i knew it was the meds that had her going nuts. i’m afraid to give molly the pill because she’s 15 can bearly see and hear she’s already incoorinate, i’m worried il hurt her if i give her the pill. so WARNING be cautious of the side effects. also if i would have read the reactions in the information i would not have purchased so maybe posting the information packed on the site would help to find the right item for our pets. any recommendations for molly ?

Rated 1 out of 5 stars
By Stephanie on Sep 22, 2025

Waste of $

Gave pill 6 days ago and my dogs are worse than when I gave the pill. Due to changing to your products for the last 3 months my dogs have infected skin and losing

Gave pill 6 days ago and my dogs are worse than when I gave the pill. Due to changing to your products for the last 3 months my dogs have infected skin and losing their hair. I'm going to have to go to vet to get meds to stop this constant itching and bloody sores on my poor babies. Should have just kept getting pills from local feed store. Highly disappointed. My dogs deserve better. Ask a dog lover and owner of a boarding facility this can't happen! I keep my place spotless and no carpet inside. Dogs don't even go outside at all they are puppy pad trained. I do everything to prevent this and two different products purchased from y'all the have caused my Furbabies pain and unnecessary suffering. Not to mention I'm having to wash them in dawn and use a flea comb to get these fleas off. It's like you gave my dogs something to attract the fleas make them multiply so my dogs need more products you're hoping I purchase from Chewy. Well not again. I'm sure going to not recommend your products!

Rated 5 out of 5 stars
By Teresa on Oct 30, 2025

Works!

My dog picked up a flea somewhere. I gave him one of these every other day. I gave him a total of four. It killed the fleas and I didn't have to treat him with a

My dog picked up a flea somewhere. I gave him one of these every other day. I gave him a total of four. It killed the fleas and I didn't have to treat him with a monthly preventive which I think is very strong.

Rated 5 out of 5 stars
By Busey on Sep 19, 2025

PetArmor

I have 2 long hair chihuahua dogs. I got this product on autoship so I miss a dose. Every once and a while we travel to see our friends. When we get home Diesel

I have 2 long hair chihuahua dogs. I got this product on autoship so I miss a dose. Every once and a while we travel to see our friends. When we get home Diesel and Gracie is covered in feas. I give each one a pill in about 10 hours no more fleas. My dogs are 14 lbs and 15 lbs. I don't have to treat them until we revisit our friends again. I love this product

Rated 5 out of 5 stars
By Amanda on Sep 5, 2025

Better than expected

Had a severe flea issue due to heat. Gave this to all our dogs and within 30 minutes the fleas were falling off dead. I will be ordering again. Worked amazingly

Had a severe flea issue due to heat. Gave this to all our dogs and within 30 minutes the fleas were falling off dead. I will be ordering again. Worked amazingly well. 10/10 highly recommend.

Rated 5 out of 5 stars
By Penny on Dec 18, 2025

Quickness

It worked very fast and was so small she took it very easy.

It worked very fast and was so small she took it very easy.

Rated 2 out of 5 stars
By Donna on Nov 13, 2025

I liked that it was in separate doses

It did not kill the fleas that it says it kills. Am still battling with fleas.

It did not kill the fleas that it says it kills. Am still battling with fleas.

Rated 2 out of 5 stars
By Brenda on Dec 12, 2025

Didn’t work

I tried it. A couple months did not see any fleas reduced.

I tried it. A couple months did not see any fleas reduced.

Rated 1 out of 5 stars
By Caridad on Sep 24, 2025

I really thought the product would work

I did nothing for my Lil Chloe looking for something that will work frustrating

I did nothing for my Lil Chloe looking for something that will work frustrating

Rated 5 out of 5 stars
By Amanda on Jan 11, 2026

cost compared to others

delivered in a timely manner

delivered in a timely manner