My cat still has fleas. When can I safely reapply Cheristin?

Question

I have a 7 lb. Balinese cat and am not sure that I was able to get the full dose of Cheristin on her the last two times I tried. Maybe only 1/2 a dose, but not sure. How soon can I try to give her another full dose? She's scratching like crazy and losing fur because of it. I know Cheristin does work on her because the first dose (given by the vet) worked great.

Dr. Melanie, BVSc MS · Accepted Answer

According to the package instructions for Cheristin, it can only be given once a month, so you will have to wait until a month has passed before you can give her another full dose. Cats are exquisitely sensitive to flea medications, so it's very important to not overdose them with the medication. It's also important to disinfect the environment when a cat has fleas. Wash her bedding in hot soapy water, and vacuum the furniture and carpet surfaces. You can use a spray to kill fleas in the house, such as Indorex, or a flea bomb would work well to kill the fleas in the home. Next time you need to put a dose of Cheristin on your cat, I'd have a friend help hold her so you can get the full dose on.

My cat still has fleas. When can I safely reapply Cheristin?

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