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About Capstar Oral Flea Treatment


Start Killing Fleas in Just 30 Minutes
When you have a flea infestation, you need to act fast! Capstar starts killing fleas within 30 minutes and is available without a prescription, so you don't have to wait. One tablet kills 90% of adult fleas in 4 hours for dogs and 6 hours for cats, offering quick relief for your pet.
Easy Oral Delivery
Capstar oral tablets go to work quickly to protect your pet from the inside out and start killing fleas in just 30 minutes! To give Capstar tablets, place the pill directly in your pet's mouth or hide it in food. If you hide the pill 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.


Treat Every Cat & Dog in your Home
Capstar is available in two dose strengths for dogs and one dose strength for cats. Capstar is for dogs and cats 2 pounds or greater and 4 weeks of age and older. Each box of Capstar contains 6 fast-acting tablets, so you can treat all the pets in the household. Fleas can reproduce on untreated pets and allow infestations to persist. Stop your pet's flea infestation dead in its tracks with Capstar.
Quick Relief with One Dose

Treatment of flea infestations in dogs and cats

Easy Oral Delivery

Recommended by veterinarians

No prescription needed
About Capstar
Capstar is a fast-acting, oral flea treatment for dogs and cats that kills adult fleas before they can start an infestation. One tablet kills over 90% of fleas within 4 hours for dogs and 6 hours for cats. Unlike topical treatments, Capstar works from the inside out-- there's no mess, no chance of rubbing off and no need to isolate your pet. Treat the pets in your home with the flea killer that starts working in just 30 minutes. Always read, understand and follow label and use directions.
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30 Customer Questions
What is lufenuron
Answer by • Apr 24, 2018
Lufenuron is the active ingredient in the veterinary flea control medication. It inhibits the development of insects, so it will kill immature stages of the flea.
I recently treated my dogs and cats with a topical flea treatment. Is this still safe to use
Answer by • Nov 14, 2017
This product is safe to use in combination with your monthly topical flea and tick medication.
What is the active ingredient and how much
Answer by • Aug 26, 2017
There are 11.4 milligrams of nitenpyram in each tablet.
This says that the 60 count one is for dogs and cats? But there's a different one just for cats. So can this one actually be given to cats as well?
Answer by • Aug 12, 2019
Capstar is now available in three packages: Capstar for Large Dogs, Capstar for Small Dogs and Capstar for Cats. You may administer Capstar for Small Dogs (11.4 mg) or Capstar for Cats (11.4 mg) to dogs, puppies, cats and kittens 4 weeks of age or older and between 2 and 25 pounds of body weight. Capstar tablets should be administered according to the dosing schedule on the label. Weigh your pet prior to administration to ensure proper dosing. Do not give Capstar for Large Dogs (57.0 mg) to cats, or dogs with less than 25 pounds of body weight.