Effipro Plus Topical Solution for Cats is a liquid spot-on parasiticide formulated with fipronil and pyriproxyfen to control fleas, ticks, mosquitoes, and chewing lice on cats and kittens weighing 1.5 pounds or more. Each carton contains three single-use applicator tubes, with the full contents of one tube applied directly to the skin between the shoulder blades each month. The solution begins working upon application and remains effective through bathing, water immersion, and sun exposure. Fipronil targets adult fleas and ticks while pyriproxyfen works against flea eggs and larvae to help reduce reinfestation over time. No mixing or assembly is required; the applicator cap is inverted and pressed down to break the seal before use. The product is intended for cats and kittens 8 weeks of age or older and should be applied to the skin rather than the haircoat for full effectiveness.