Obagi clenziderm m.d. System is a prescription-strength three-step anti-acne system. It uses a revolutionary new liquid-gel form of benzoyl peroxide 5% in combination with salicylic acid that allows for deeper penetration to control acne.. Clinically proven to penetrate the pores deeply and clear acne quickly. Daily care foaming cleanser with 2% salicylic acid genteelly washes away old dead skin cells. Therapeutic lotion with 5% benzoyl peroxide deeply cleanse skin.