Health & WellbeingMy cat still has fleas. When can I safely reapply Cheristin?
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.
Updated on September 24th, 2025
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