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Capstar Flea Tablets for Dogs and Cats

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Product Overview

How To Use

What’s in it?


Questions & Answers

Product Description

Capstar Flea Tablets for Dogs and Cats is a quick-acting flea treatment with nitenpyram. This once-daily medication treats existing flea infestations. See Allivet's Flea and Tick chart to find which flea and tick product is best for your pet. 

Who is Capstar Flea Tablets for Dogs and Cats for?

For use in kittens, cats, puppies, and dogs over the age of 4 weeks and weighing at least 2 pounds. Also safe for use in nursing or pregnant cats and dogs.

Why use Capstar Flea Tablets for Dogs and Cats?

Capstar is an effective flea treatment that works in as little as one treatment. Capstar stops fleas from biting and kills adult fleas within 30 minutes.

How does Capstar Flea Tablets for Dogs and Cats work?

Capstar Tablets treat flea infestations, working to kill adult fleas with the active ingredient nitenpyram.



Active ingredient(s):

Capstar Tablets contain 11.4 or 57.0 mg of nitenpyram, which belongs to the chemical class of neonicotinoids. Nitenpyram kills adult fleas.

How is Capstar Flea Tablets for Dogs and Cats sold?

  • Capstar for Cats 2-25 lbs Purple 6 Ct.
  • Capstar Dogs 2-25 lbs 6 Ct. and Dogs and Cats 60 Ct Blue
  • Capstar Dogs 25 lbs & Up 6 Ct. and 60 Ct Green

What are the side effects of Capstar Flea Tablets for Dogs and Cats?

In increasing order of frequency, the most frequently-reported side effects in dogs are: nervousness, fever, salivation, vocalization, hives, panting, seizures, trembling, incoordination, hyperactivity, diarrhea, decreased appetite, itching, vomiting, depression or lethargy.

In increasing order of frequency, the most frequently-reported side effects in cats are: trembling, increased heart rate, dilated pupils, seizures, incoordination, salivation, difficulty breathing, diarrhea, nervousness, decreased appetite, fever, vomiting, vocalization, itching, lethargy, panting, hyperactivity

What special precautions are there?

  • Do not administer to pets under 2 pounds.
  • Keep out of reach of children.

What to do if overdose?

Contact your closest emergency pet hospital.

How can I store Capstar Flea Tablets for Dogs and Cats?

Store at room temperature between 59° and 77°F (15°-25°C).

Helpful Tips:

  • Capstar is safe for use with other products, such as other flea products, shampoos, deworming medication, vaccines, antibiotics, corticosteroids, and heartworm preventative.
  • Capstar tablets do not affect fleas in your pet's environment, so you may need to treat more than once. Immature fleas around or in the home will keep developing into re-infesting adults.
  • Capstar protects your pet from parasite infestation because fleas often transmit them. This includes tapeworms.
  • If your pet experiences re-infestation, it is safe to administer another dose each day.
  • One dose should effectively kill adult fleas on your pet.


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 all infested pets in the household. Fleas can reproduce on untreated pets and allow infestations to persist.Flea Infestations on Dogs In addition to the common nuisance irritations associated with infestations, fleas can be responsible for skin conditions in your pet such as flea allergy dermatitis (FAD) in the dog and miliary dermatitis in the cat.

Recommended Dosage Schedule


Body Weight
 Per Tablet

Dog or Cat

2-25 lbs.

One Tablet



2-25 lbs.

One Tablet



Main Ingredients

Capstar Flea Treatment (for Dogs and Cats 2-25 lbs):


Active Ingredients



11.4 mg


Capstar Flea Treatment (for Dogs over 25 lbs):


Active Ingredients



57.0 mg

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Capstar Flea Tablets for Dogs and Cats

Customer Submitted Questions

This only shows dosage for dogs up to 25 pounds. Can this be used for an 80lb dog?

1 Answer

Can Capstart be given to a cat once a month?

1 Answer
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