Elanco Animal Health Cheristin for Cats Topical Flea Treatment and Prevention &ndash; 6 Monthly Doses - 33385 FLEA TREATMENT FOR CATS: A gentle one size-fits-all flea treatment. Great for multi-cat families, Cheristin kills fleas for fast, long-lasting protection KILLS FLEAS FAST: Start killing fleas fast within 30 minutes of application and lasts a full month for cats and kittens 8 weeks of age or older and 1.8 lbs or greater EFFECTIVE FLEA TREATMENT: Cheristin Flea Treatment for cats killed 100% of fleas within 12 hours in controlled study EASY TO USE: Simple to use and dependably long-lasting, Cheristin Flea Treatment provides 99% flea control for a full month QUICK DRYING FLEA AND PROTECTION FOR CATS: Easy to use applicator is in a quick-drying, non-greasy formula that is comfortable to apply for you and your cat