Obagi CLENZIderm® M.D. Systems are the only prescription-strength acne treatments that contain a patented, solubilized form of 5% benzoyl peroxide (BPO) to penetrate deep into the follicle and treat acne where it starts. Available in two distinct systems, for normal to oily skin or normal to dry skin, these simple, 3-step, physician-dispensed acne therapies from Obagi Medical are clinically proven to better penetrate the follicles for effective P. acnes bacteria reduction and rapid lesion reduction.