Other Information: Store at controlled room temperature 59-86 degrees F (15-30 degrees C). Misc: 10% benzoyl peroxide. Dermatologist recommended ingredients. Therapeutic acne control. Face; chest; back. Benzoyl peroxide effectively penetrates pores kills the bacteria that cause acne. Clears existing acne blemishes and prevents new blemishes from forming. Questions? Call 1-888-438-7426. Side effects may be reported to this number. www.stiefelchc.com. Now you can take control of your acne with maximum strength PanOxyl Acne Cleansing Bar, the highest strength of benzoyl peroxide (BPO) available without a prescription. The benzoyl peroxide in the PanOxyl Acne Cleansing Bar is the same medicine prescribed by dermatologists. The convenient bar form of PanOxyl gently removes dirt and excess oil to cleanse and unclog pores, making it an excellent choice for the management of acne on the face, chest and back.