I was prescribed Keflex for a UTI but I haven't been on it for acne. It kills bacteria so I am guessing it would be an effective cleanser.

If you are taking it in pill form, be aware that it kills good bacteria as well as bad. I got a very stubborn yeast infection while I was on it. Eat lots of yogurt and dairy with active cultures in them while you are on it.

My son's Derm. prescribed Keflex to be taken at the start of his accutane regimine. This is because when starting accutane, it can really break you out during the first few weeks. The Doctor found that Keflex really calms or eliminates this breakout. It eliminated it for my son. He had no breakout.

my doc gave me keflex then took me off it to give me doxicycline. it worked pretty good for awhile but i thin my body started to reject it so it didnt work any more.