Instructions
Eliminate fleas from your cat's environment. It can be argued that this is more important than killing the fleas on the cat itself, as the majority of the flea population is not in fact on the cat. Bug sprays and bug bombings (with you and your furry friend at a safe distance from the chemicals, of course) are ways to do this. If the problem persists, contact an exterminator if necessary.
Use a cheaper, non-chemical method first by running a fine toothed flea comb over your cat. This procedure will dredge up a significant number of fleas. Have a cup of water sitting to the side to dispose of them, as it is difficult (and not to mention messy) to squash them. Many cats find this procedure soothing, as to them it is no different than a standard brushing. One drawback, however, is that there is no guarantee that you will get all of the fleas off, and your cat could tire of the procedure and struggle to break free.
Apply flea powders, sprays and baths. These products are pretty safe with no harmful side effects. If you have successfully cleared your cat's environment of fleas, these can be very effective. However, these only kill the fleas that are there with no future prevention. If your cat is an outside cat or shares the house with other affected animals, then you may want to try a higher-end spray that has chemicals to end the insect life cycle. Not only will the fleas be killed, they won't be able to come back.
Consult with your veterinarian about products that they might have. There are a few creams and pills on the market that could prove effective if all else has failed.
How to Kill Adult Fleas on Cats
If you have a cat, then you know just how pesky of a problem fleas can be. Not only is the itching unpleasant for the animal, but it can also have other negative side effects, such as chaffing and sores from constant scratching. In extreme cases, it can lead to anemia in your cat. The problem with fleas is that there are many more than those on your cat, as it is just the adult fleas that use an animal host. With the proper treatment procedures, however, you can easily rid your home and cat from fleas.