Cheristin Flea & Tick Solutions for Cats | Petco

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Vet Q & A
My 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
Vet Q & A
Need flea treatment for multiple cats? What's best to buy online?
If it is available, my best topical flea treatment for cats is Cheristin. It is very effective and kills fleas before they bite, which is helpful for cats with flea allergies since it is the bite they react to. Comfortis is a tablet that is also very effective, but it can cause vomiting.
Updated on September 24th, 2025
Health & Wellness
My kitten's ZoGuard isn't working. Can I use Cheristin now?
I am sorry to hear about Mittens! It should be fine to use the Cheristin as the Zogaurd is a different type of medication so they should not interfere. I would also recommend treatment of your home if you are having issues with fleas coming back. This may involve enlisting the help of a professional or treating yourself with Knockout spray or fogger after vacuuming all floors and furniture well (even wood floors) and throwing out the bag, and washing all bedding thoroughly.
Updated on September 24th, 2025
Vet Q & A
Is Cheristin safe for my 5-month-old kitten despite bad reviews?
There will always be negative reviews for any product. There have been some cases in which cats have had undesirable side effects but there is no way to determine which cat will respond in this way. As a topical, you can try it and watch your cat closely. If you see negative side effects, you can wash the area with warm water and Dawn dish liquid to remove it before your cat absorbs more or it dries.
Updated on September 24th, 2025
Vet Q & A
Cat scratching after Cheristin. Can I give Capstar for fleas?
According to Plumb's Veterinary handbook, the only contraindications for use in Capstar is that it's not to be used in animals under two pounds of body weight or under four weeks of age. It's therefore safe to give this to your cat now :-)
Updated on September 24th, 2025