The quickest way to kill a flea and tick is to expose them directly to a wet insecticide product like a shampoo or spray. Shampoos and sprays work fast because they are applied directly to the entire coat, penetrating to the skin, where fleas and ticks are usually found.

Active Ingredients: Pyrethrins 0.15%/(S)-Methoprene 0.10%/Piperonyl Butoxide 1.50%