This 5% Benzoyl Peroxide spot treatment is one of the most effective topical treatments for acne. Once on the effected area, it reduces the amount of bacteria and fatty acids in the skin. Formulated with 10% benzoyl peroxide for more severe acne conditions, Skin Medication No. 10 aggressively penetrates pores to eliminate acne-causing bacteria while aloe vera and tea tree oil help lessen irritation.