I was prescribed Bactrim DS & Cephelaxin for an absess I had on my stomach. I suffered hives, swellen lips, face, pain, heart racing, shortnessof breath. The hospital kept me over nite for observations. I think they prescribed the wrong doses as well. I was instructed to take 2 Bactrim twice a day & 1 cephelaxin 4 times a day. Been home from the hospital for 4 days now. Just starting to feel some relief, how long will it be before i'm back to myself? The hospital sent me home with benedryl, prednisone, zantac.