Johnson's 4fleas Tablets are an easy to use oral treatment to kill adult fleas on large dogs over 11kg in bodyweight. They can either be given directly into the mouth, or mixed in with a small potion of your dog's favourite food and given immediately Once ingested, the tablets start to kill fleas in 15 minutes, and will kill all fleas in 24 hours. Administer on any day when fleas are seen on your dog. Johnson's 4fleas tablets are safe to use in pregnant or lactating females & breeding dogs and can also be used alongside other flea or worm treatments. Pack contains: 6 tablets.