So let’s say you’re acne-prone but don’t like or can’t tolerate benzoyl peroxide. Not a problem. O2 Med does all the heavy lifting–the liquid penetrates on contact and turns into oxygen gas under skin’s surface–but without the potential dryness or irritation. 1.7 fl. oz. For normal to oily skin with stubborn adult, hormonal, or premenstrual acne. Super-absorbent silky oxygen emulsion treats painful pimples beneath the surface of the skin, improving cell metabolism, disinfecting bacteria and rehydrating as it works. No potential dryness or irritation!