Johnsons 4fleas for cats and kittens tablets are an easy oral treatment for flea infestations on your cat or kitten aged over 4weeks johnsons tablets are fast acting and easily administered with their effects killing fleas in just 24 hours johnsons 4fleas tablets can only be fully effective as part of a flea treatment programme that will eliminate fleas and their eggs from pets and their surroundings pet bedding and the household should be vacuumed regularly and treated with a suitable ins