The pills amazed me. My cat got fleas and the upstairs was a flea haven. You could literally see them jumping at you and with khaki pants on, the number on my legs was obscene. I took said cat to the vet and they gave him a pill. By the time I got home every flea on him was dead in his carrying crate. I sent him upstairs as a biological weapon and he destroyed the infestation. After a thorough vacuum I never saw another flea. Powerful stuff. I can't remember the name but I remember it was expensive.