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Nov 17, 2025
Seeing your furry companions itch incessantly due to fleas can be stressful. Fleas are blood-sucking parasites that not only make your pet itch, but they can also cause health issues, including flea allergy dermatitis. What’s worse, an uncontrolled flea infestation can lead to anemia. Therefore, it is essential to eliminate fleas as soon as you spot them and treat the flea infestation before it causes problems. The good news is that there is a powerful flea treatment that kills fleas instantly and ensures faster relief, i.e., Capstar.
In this blog post, we will discuss everything about Capstar, from its benefits to administration.
Let’s dive into the details!
Capstar is a highly effective, rapid-action, easy-to-dose, oral flea treatment for dogs and cats. It is suitable for puppies and kittens from 4 weeks of age, weighing 1kg or greater. The treatment starts working within 30 minutes of administration and a single dose lasts for up to 24-48 hours. It kills over 90% fleas within 4 hours in dogs and 6 hours in cats and helps treat re-infestations. It is also effective in killing fleas that may cause flea allergy dermatitis (FAD).
Capstar can be safely used in conjunction with other treatments including heartworm preventives, antibiotics, vaccines, dewormers, shampoos and other flea products. Moreover, it is safe for use in pregnant and nursing pets.
Let’s have a quick look at why you should consider using Capstar for your pet’s flea control:
Capstar is formulated with a powerful ingredient, Nitenpyram, which rapidly kills fleas by interrupting their nervous system. Post administration, the active ingredient enters the pet’s bloodstream and when an adult flea bites a pet, it ingests the active ingredient, causing neurotoxicity and death of the parasite.
Please note that Capstar does not eliminate flea eggs, larvae and pupae.
Here’s how you can administer Capstar to your pet effortlessly:

Follow the instructions mentioned on the product label carefully and consult the veterinarian in case your pet exhibits any unusual signs.
Bottom Line
In the end, Capstar is an ideal treatment for dogs and cats for quick flea elimination. Compared to other flea treatments, this oral formula offers mess-free administration, quick results and better efficacy against adult fleas.
A single dose of Capstar provides 24-48 hours of flea protection, making it an appropriate choice for pets prone to flea infestations. However, make sure to keep the product away from children and wash your hands properly before and after administration. Don’t forget to speak to a vet for expert recommendations.
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