If your cat is at high risk for fleas, ticks, or chewing lice, Frontline Plus for Cats & Kittens is the best answer! When used monthly, Frontline Plus for Cats completely breaks the flea life cycle and controls tick and chewing lice infestations. Research demonstrates that Frontline for cats kills adult fleas, flea eggs, and flea larvae for up to six weeks and ticks for up to 4 weeks. This fast acting flea treatment for cats is proven effective after bathing, because it is highly waterproof. For use with cats and kittens over 8 weeks of age. Follow instructions carefully and Frontline for cats will win the war on fleas!Do I need a prescription to purchase this product? No.What stages of the flea cycle does this products kill, suppress, or sterilize? Kills adult fleas, flea eggs, and flea larvae.What is the main flea killing ingredient (active ingredient)? Fipronil.What are the flea sterilizing or additional ingredients? Methoprene (flea sterilizer).Intended Use: Cats.What is the youngest age I can use this on my pet? At least 8 weeks.What is the weight requirements for use? None.Can I use on my pregnant or lactating (nursing) pet? Yes.Is this Waterproof or Water Resistant?: Waterproof. After application, pet should not swim or bathe for at least 24 hours.How long before it starts to work? Begins working within 4 hours of administration.How long until maximum effectiveness is reached? Within 12 hours, 100% fleas are dead.What other parasites does this kill, control, or repel? Kills Lone Star Ticks, American Dog Ticks, Deer Ticks, Brown Dog Ticks, Western Blacklegged Ticks, and Lice.How often should I apply or administer? Monthly.How is it administered (Topically, orally, or other)? Topical. Pet should be completely dry before application.Directions for Use: To apply, simply follow these instructionsûand repeat every 30 days:1. Remove Applicator: Lift and remove the plastic tab to expose foil backing. Then peel away the foil. Or use scissors to open2. Open Applicator: Hold upright with foil side toward you and snap applicator tip3. Apply FRONTLINE Plus: Part your pet's hair between the shoulder blades. Place the applicator tip just above the skin and squeeze. Apply entire contents of the applicator in a single spot directly onto the animal's skin. Do not apply on top of the haircoat. Avoid contact with treated area until dry.Cautions and Possible Side Effects: Some temporary irritation at the site of application can occur with any pesticide made for pets. Observe your pet following treatment and if signs persist or become more severe a few days after application, contact your veterinarian immediately.