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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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32 Customer Questions
can you administer this pill and also being using a topical flea product as well ?
Answer by • Sep 11, 2019
If you are currently administering a monthly flea infestation preventive and your pet still gets fleas, you may administer Capstar treatments daily, as needed, for quick relief against a flea infestation. Capstar may also be used with flea shampoos, as well as heartworm preventives, antibiotics, vaccines and de-worming medications.
I have several ferals I feed wet food every morning is it okay to crush capstar up and mix it in their breakfast?
Answer by • Jul 08, 2020
While it is possible to crush this treatment and place within food, if multiple cats are eating from the same dish(es) then they may consume too much or too little of the treatment for it to work safely and effectively.
How many tablets per order?
Answer by • Dec 24, 2019
The Capstar Flea Tablets for Cats 2-25 lbs, 6 count includes 6 tablets.
Is it normal for my cat to get dehydrated after consuming the pill?
Answer by • Aug 01, 2019
Being dehydrated typically isn't a normal side effect and we recommend you consult with a vet.