Advantage II flea treatment for cats has been redesigned and improved, enhancing the protections this cat flea treatment offers. Advantage II is among the best flea treatment for cats. Advantage flea medicine only has to be applied one time per month, and it will provide a full 30-day protection from fleas and their eggs or larvae. By cutting off the birthing cycle of the fleas, Advantage flea treatment breaks any kind of establishment and infestation within the cat's hair or bed. Further, the flea control medicine actively kills existing fleas within a half day or 12 hours, removing their ability to propagate and stay on until this flea medicine for cats wears off.