Benzonix soap is a anti-acne preparation containing benzoyl peroxide.Benzoyl peroxide is an oxidizing agent that possesses antibacterial properties and is classified as a keratolytic. Directions for use: Wet skin and liberally apply to areas to be cleansed massage gently into skin for 10-20 seconds working into a full lather rinse thoroughly and pat dry.Wash affected areas as directed by dermatologist. Precaution: Avoid contact with eyes or mucous membranes. If drying occurs it may be controlled by rinsing cleanser off sooner or using less often. Use under medical supervision.