For a fast working, effective flea treatment for cats, try Revolution Blue for Cats.
Suitable for cats between 2.6-7.5kg, Revolution works to eliminate heart worms, fleas and harmful parasites.
The liquid formula can be easily applied to your cat's skin with the quick spot on applicator. No need to mess around with finicky tablets, simply part a section of your cat's fur at the back of their neck and release the liquid onto their skin. One application will protect them for an entire month and is waterproof after two hours.