Description About this item ------ 24 doses......... 19 boxes in stock. FOR CATS OVER 1.5 pounds: Catego is a safe and effective formula for cats that kills fleas, flea eggs, flea larvae, ticks and chewing lice. May be used on cats as young as 8 weeks old FAST RELIEF: Catego kills fleas in just 6 hours compared to other brands that take 12 hours LONG LASTING MEDICINE: Your cat will be rid of those unwanted guests for 30 days ACTIVE INGREDIENTS: Catego has a unique combination of three proven active ingredients; Dinotefuran, Fipronil, and Pyriproxyfen EASY TO APPLY: The patented applicator makes it easy to apply and minimizes risk of skin abrasion. The formula is non greasy, quick drying, and is small in volume; ensuring no medicine is wasted