Johnson's 4fleas Tablets are an easy-to-use oral treatment which kills adult fleas on cats and kittens over 4 weeks of age between 1kg and 11kg in body weight. Johnson's 4fleas Tablets start killing fleas in 15 minutes and will kill all fleas in 24 hours. The tablets can be given either directly into the mouth or crushed and mixed in with food, and unlike topical treatments, no residue is left on your cat's coat or in the home. Johnson's 4fleas tablets can also be safely given to pregnant or lactating females and breeding cats. Administer on any day when fleas are seen on your cat.