|  | CAPSTAR Capstar (nitenpyram) is a once a day medication approved for use in the treatment of flea infestations on dogs and puppies, cats and kittens 4 weeks of age or older. Capstar is safe to use in pregnant or breeding animals. An adult female flea can lay up to 2,000 eggs in her lifetime. Capstar begins to kill adult fleas on the pet within 30 minutes and the effect lasts for 24 hours. Pets may scratch as a result of the fleas dying. It is not a reaction to the medication itself. There are no known drug or food interactions.
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