If the medication you are giving your cat is not working, you may have to take further measures. You may want to take him to a groomer to have them give him a flea bath. You can also do this yourself at home, if you want. If he is picking up fleas out of your yard, then a flea bath won’t really help, though. For a badly infested yard, you may have to hire an exterminator.

You may have fleas living in your carpet. This is a common place they like to hang out, as well as other soft areas with lots of places to hide, such as mattresses, bedding, laundry, rugs, etc. They like to hop up onto your legs as you walk by, then work their way into your clothes to get a bite. You can figure out if you have them in your carpet by paying attention to where you are in the house when you get bitten. If it keeps happening in the same place, more than likely there are fleas in that area. Flea bombs work especially well if you have fleas in the rug.

One more thing I will suggest, is a product you can find at some pet stores and natural foods stores, called PetGuard. It is made from brewer’s yeast and garlic, in either powder form to mix into food, or chewable tablets. Brewer’s yeast and garlic are natural flea repellents, and animals that consume this on a regular basis will have an improved resistance to fleas. I have used this on my cats successfully for years, and don’t use any flea medication or collars anymore. Some people like to thumbs down me when I suggest this to others here, because they think garlic is poisonous. ONION is posionous to cats, not garlic - they are not the same plant species. I have never had an animal get sick from using PetGuard, yet I have had a cat almost die after I used those flea drops from the vet on him (I dont remember which brand).

Good luck, I hope this helps =^.^=