Cephalexin is a cephalosporin (SEF a low spor in) antibiotic. It works by fighting bacteria in your body. where can i get cephalexin without prescription (cephalexin4all.top) is used to treat infections caused by bacteria, including upper respiratory infections, ear infections, skin infections, urinary tract infections and bone infections. Cephalexin may also be used for purposes not listed in this medication guide.