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My pregnant cat has fleas. Is it safe to use flea treatment on her?

Updated On September 23rd, 2025

Pet's info: Cat | Maine Coon | Female | unspayed | 5 lbs

Hi, my cat is pregnant and has fleas. Can I use flea treatment on her right now?

5 Answers

Most Helpful Answer

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Answered By Jeffrey Milner

Veterinarian

Published on June 9th, 2017

To my knowledge, there is only one safe (supposedly) flea / tick treatment for pregnant / lactating cats. That is Frontline. I would still read the label carefully and see if the study they did revealed any weird birth defects in large numbers, but it is definitely supposed to be safe.

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18Pet Parents found this answer helpful

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    Answered By Angel Alvarado, LVT

    Licensed Veterinary Technician

    Published on

    Frontline is safe to use on pregnant cats. You will need to vacuum everywhere she has been, disposing of the bag outdoors immediately after. Wash all bedding as well. You should also use an area treatment to prevent reinfestation. Use a topical preventative monthly for at least three consecutive months, preferably year round.

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    Answered By Destini R. Holloway, DVM

    Veterinarian

    Published on June 25th, 2017

    Absolutely not. This will undoubtedly cause a toxicity for your cat. Please only use cat flea preventative on your cat Angie to avoid making her very sick. It is good that you checked with us first. Look into cat products like Revolution, Advantage for cats or Comforirs for cats instead. Take care.

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  • Published on May 15th, 2017

    Yes you can, strictly use the product recommended for cats. Other spot on may work better (like Stronghold), as fleas are getting resistant to frontline. Please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on September 19th, 2018

    It is not recommended to use Hartz® UltraGuard® brand flea and tick products on pregnant cats (or dogs). You can, however, use a product called Frontline spray on your pregnant cat. 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 (in your case: Frontline spray) 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.

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