My dermatologist put me on Doryx, as well as a benzoyl peroxide gel for my face, and something called tazarac for my chest, back, and neck. I didn't have any acne before the cycle, I started taking this stuff, and I still don't have any. A dermatologist can really help! I broke out REALLY bad on a cycle a year ago, and I have scarring on my back, the tazarac helped the scars go away as well.