Frontline Plus For Cats & Kittens kills fleas and ticks on your cat. Sold as single one month application. Do not allow children to pet or hug cat at site of application for about a day. Consult with your Vetrinarian if you suspect any adverse reaction. Do not use flea shampoo, spray, or collar when using Frontline Plus. Do treat your home with a premise spray if you have had fleas.