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Capstar Flea Treatment Tablets

$37.49 $26.99 
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02-25 lbs
26-125 lbs
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$37.49 $26.99 
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Product Info
How to Use
Customer Reviews
Product Info
What is Capstar Flea Treatment Tablets?

Capstar Flea Treatment Tablets are used to kill fleas on dogs and cats, which begins working within 30 minutes. Capstar will kill more than 90% of adult fleas within 4 hours on dogs and 6 hours on cats, and pets may temporarily scratch as a result of the fleas dying.


Cats (4 weeks of age and older and 2 pounds of body weight or greater) Dogs (4 weeks of age and older and 2 pounds of body weight or greater)

  • Starts killing fleas within 30 minutes
  • Unflavored tablet
  • Safe for pregnant or nursing dogs and cats
How it Works:

The active ingredient in Capstar is nitenpyram, an insecticide. This oral treatment kills adult fleas quickly. Nitenpyram interferes with nerve transmission in fleas, with no adverse effect on your pet.


Pets may scratch as a result of the fleas dying, but it is a temporary condition and not a reaction to the medication itself.

Brand Name:

Capstar (Novartis Animal Health)

Active Ingredient(s):


What is Capstar used for:

Capstar is an oral medication used to kill fleas on dogs and cats. It works within 30 minutes but the effects last only 24 hours.


Capstar is a non-prescription (OTC) product.

How Capstar Flea Treatment Tablets should be used:

Capstar is approved for use in dogs and cats over 4 weeks of age and over 2 pounds of body weight. It is available in packages for dogs and cats 2-25 pounds and dogs 25.1-125 pounds. Choose the correct strength and give 1 tablet as the dose. For pets over 125 pounds give the correct combination of tablets.

What are the side effects of Capstar:

Side effects that may occur in dogs include Lethargy/depression, vomiting, itching, decreased appetite, diarrhea, hyperactivity, incoordination, trembling, seizures, panting, allergic reactions including hives, vocalization, salivation, fever, and nervousness. Side effects that may occur in cats include Hyperactivity, panting, lethargy, itching, vocalization, vomiting, fever, decreased appetite, nervousness, diarrhea, difficulty breathing, salivation, incoordination, seizures, pupil dilation, increased heart rate, and trembling. There are no known drug or food interactions

What special precautions are there:

This medication treats the pet only. To properly control fleas all pets must be treated and the outside and inside environments also need to be treated to prevent a reoccurrence.

In the event of overdose:

Contact your veterinarian or veterinary emergency room.

How should I store this product:

Store this product at room temperature. Keep out of the reach of children and pets.

How to Use
  • Capstar Flea Treatment Tablets are available in packages for dogs and cats 2-25 lbs (11.4 mg) and for dogs 25.1-125 lbs (57 mg).
  • Capstar Flea Treatment Tablets begin working within 30 minutes. Redose pet as often as once a day if needed.

Pets may scratch as a result of the fleas dying.

Dogs/Puppies: (over 4 weeks of age)
2-25 lbs
Give 1 tablet (11.4 mg)
25.1-125 lbs
Give 1 tablet (57 mg)
Over 125 lbs
Give appropriate combination of tablets
Cats/Kittens: (over 4 weeks of age)
2-25 lbs
Give 1 tablet (11.4 mg)
Do not use!

Should be stored at room temperature.

Capstar Flea Treatment Tablets (for Dogs and Cats 2-25 lbs):
Active Ingredients
11.4 mg
Capstar Flea Treatment Tablets (for Dogs over 25 lbs):
Active Ingredients
57.0 mg
Customer Reviews
Capstar Flea Treatment Tablets is rated 4.2438 out of 5 by 644.
Rated 5 out of 5 by from Relief My 3 cats came down with fleas. We believe it was our adopted outdoor cat. Anyway, our other adopted cat has flea dermatitis and was breaking out in horrific sores as well as losing fur and being miserable. Our 3rd cat we are fostering for a friend and ended up losing fur too. We tried Diatomaceous Earth which controlled it, but no elimination. We finally ordered Capstar as a last ditch resort. So glad we did. Within 30min all 3 cats had immediate relief. We even picked up a few fleas who had fallen over dead. No adverse reactions in any of the cats to the medication. 4 days later...The dermatitis has cleared up in both cats. The outdoor cat had tapeworm I guess too, because those came running out his back end. Doing a second dose in a few days time. I have nothing but good things to say about this medication as my cats are all back to their normal selves personality wise. It has killed the existing flea population and we are ready and armed with Capstar for round 2!
Date published: 2017-01-04
Rated 5 out of 5 by from My cat is allergic to fleas and this works best for him. He is like a different car after he gets this treatment.
Date published: 2016-12-24
Date published: 2016-12-18
Rated 5 out of 5 by from The best product for relief from fleas! I've been using Capstar for my cats on and off for several years. I have indoor cats, but once in a while they manage to slip outside and sometimes bring fleas back inside with them and we all know how fast fleas multiply! Capstar is a wonderful product; the fleas fall right off my cats shortly after they ingest the tablet and my cats have never experienced any side effects from the medication. I would highly recommend this product.
Date published: 2016-12-07
Rated 5 out of 5 by from This is sooooooo good! When I first discovered Capstar, I think it was 9 years ago when I had 4 dogs and 2 cats. I wasn't sure what to expect, and had to purchase enough to cover all the animals. Well, needless to say, on the very first treatment, we had fleas jumping off all the animals! They were landing on my carpet, dead! I only gave the animals 2 doses because there was no sign of fleas after the second dose. I only have one dog left. :( This is the first year in the past 5 years that I have given him Capstar because of his scratching made me believe he has fleas again. Since I have only given him one dose, he hasn't scratched since. Yes, you are reading this correctly! We have not had a flea issue in all these years and I thank Capstar for that. Yes, I have recommended Capstar to several friends and they have had the same result.
Date published: 2016-12-02
Rated 5 out of 5 by from This product WORKS. Firstly, let me tell you how sceptical and pessimistic I am about anything prescription or unnatural. I researched about Capstar for days and read many reviews before I took my cat to the vet to get his flea problem under control. Well, he was given cap star for the first time today at the vet, and by the time we got home and I let him out of his carrier, there were dead fleas all over the towel he was laying on. Once we got home he was cleaning himself to rid himself of the dead fleas, so I sat with him and helped him brush them out of his fur. He was purring and nuzzling into me, his way of saying "thank you I feel so much better!" If your baby is infested and uncomfortable, I recommend this product 100%.
Date published: 2016-11-30
Rated 5 out of 5 by from It really works! My cat got out one day and returned with a nice little flea infestation. She then passed it to our dog and before you knew it, it was out of control. I am usually really skeptical when it comes to online product reviews. But I was in dire need of a flea treatment quick! So as a last ditch effort, I came here and ordered Capstar based on their ratings because the Dawn dish soap baths and flea collars weren't cutting it. I have to say that one round of Capstar got the job done! While it didn't work within the advertised 30 minutes, it definitely took effect within a few hours. My dog and cat were running around scratching like crazy and the fleas were falling off and twitching/dying. This also made it easier to pick them off their fur. I'm 100% satisfied and plan to use it again if I need to!
Date published: 2016-11-30
Rated 5 out of 5 by from Awesome! I was a little hesitant about buying this because it's kind of expensive but after using it I can definitely say it's worth every penny. The fleas literally just fell off my cats. My poor little guys even had very large fleas embedded in their faces under their whiskers and they popped right out and died. I didn't even know fleas could burrow into the skin like that. But thanks to this product my cats a flea free and so much happier. Thanks so much!
Date published: 2016-11-11
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What is the name of the other med the women in the video says too use with capstar flea treatment.

Asked by: Ladyraven
The second medication mentioned in the video is Program tablets.
Answered by: Amy Petmed Pro
Date published: 2017-01-03

We were given Capstar by a vet for our two kittens that have fleas. It worked on the first day it was given however the vet told us onlybuse it once a week. We now are seeing baby flees on the blanket the sleep on. Is it safe to give another dose to them?

Asked by: Josh1289
According to the manufacturer you can redose pet as often as once a day if needed. If your vet advise you otherwise there may be a reason for that since they have seen the kittens. We will advise you to contact them directly to get an answer.
Answered by: Carolyn Petmed Pro
Date published: 2016-12-02

How get cat take capstar?

Asked by: Susie
You may find a pill pocket or a pet piller helpful. A pill pocket is a treat used to hide the tablet; whereas, a pet piller is a device used to ease administration of oral medications.
Answered by: Lisa M
Date published: 2016-11-19

Can you use this on kittens at 8.5 weeks old? I'm also not sure if she's even 2 lbs yet?

Asked by: Renee10
Capstar may be used in cats 4 weeks of age or older and weighing more than two pounds. Your veterinarian can determine if this treatment is appropriate for your specific pet.
Answered by: Lisa M
Date published: 2016-11-18

What would you recommend using as treatment on the cat along with three Capstar?

Asked by: Shawn
You can use any monthly topical flea and tick medication in conjunction with the Capstar since the Capstar only stays effective for 24 hours.
Answered by: Cherley Petmeds Pro
Date published: 2016-11-18

Is there a specific type of bug problem asociated with long haired chiwawas

Asked by: chevy
Not necessarily. It is important for all pets to be on monthly preventative products as recommended by your veterinarian.
Answered by: S Duesler PharmD MBA
Date published: 2016-11-17

How often can I give my 10 lb dog a capstar? I'm fighting my first and hopefully last infestation. 

Asked by: Insain24
This product can only be given once a day when you see live fleas.
Answered by: Carolyn Petmed Pro
Date published: 2016-11-15

I have already used Frontline on 3 cats and they still have fleas, is it safe to use Capstar within less than 30 days?

Asked by: Lorri
This product can be used in combination with a flea and tick topical. It can only be used when you see live adult fleas once a day if needed.
Answered by: Carolyn Petmed Pro
Date published: 2016-11-15
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