Cephalexin
"I had back pains for three days and unable to sleep comfortably. By the four day I couldn't even take a deep breath. I tried  Salonpas along with back massagers and soaking. Nothing helped! I went to the E.R. urine test revealed elevated white cell .They prescribed me cephalexin 500 mg three times a day. I was in so much discomfort I started the medication immediately!  I felt 100% better the very next day. I have been drinking water and cranberry juice."