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Frontline for kittens: How long until fleas are gone and my home is safe?

Updated On September 23rd, 2025

After applying Frontline to a kitten, how long will it take to work? Attempting to rescue a stray that was dumped and now living under a abandoned home. Need to keep it in my bathroom a few days and wait till spay n neuter clinic opens again next week and i have 3 indoor cats. Dont want to risk my apartment or my cats to fleas. Should i keep kitty out of home till it takes effect? Thankyou.

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2 Answers

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on October 3rd, 2018

Frontline will kill fleas within 24 hours and ticks within 48 hours. To be safe, you should also treat all your cats as well. A majority of a flea population lives off the pet, only hopping on to feed. A flea treatment and prevention program will include treatment of the pet and the environment. Use a preventative for at least 3 consecutive months, preferably year round.

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on September 29th, 2018

    You should be able to give the advantage (for cats) about 10 days after having reapplied the Frontline. However there is more you need to do to get rid of fleas: Unfortunately fleas only hop on the body of your pet when they want to feed, then they hop off again and stay in your pet's environment. So you need to treat all pets in the household as well as the environment (which contains the fleas, their eggs and larvae). Flea treatment:  1) Get some flea medication such as a Flea spray or a spot on from a pet shop or your veterinarian and apply monthly (as you have done) 2) get flea powder, put some in your vacuum cleaner bag and vacuum your house and furniture and also non-carpeted areas frequently to remove flea larvae and eggs which live off house dust., Dispose of the bag in the trash outside. Hot-wash all the pet's bedding, If you do this diligently for a few months you will get rid of the fleas. Flea products: Spot-ons and/or chews Advantage, Advantix Advantage Multi (Advocate in the UK) Frontline (ticks as well) Bravecto spot on (ticks as well) - for cats, in tablet form for dogs Simparica, Nexgard Revolution (stronghold in the UK) Tablets: comfortis (will only kill fleas once) Collar: Seresto (ticks as well)

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