How Does Nizoral Scalp Psoriasis Shampoo & Conditioner Work? Maximum strength medication (Salicylic Acid 3%) is found in Nizoral Scalp Psoriasis Shampoo & Conditioner to help with scalp psoriasis symptoms while also leaving hair clean and conditioned. Tea tree oil, green tea extract, and vitamins E, C, and B5 are all included in the unique formulation, which is free of skin-irritating chemical perfumes, preservatives, and dyes. #nizoral #psoriasis #scalppsoriasis #shampoo #conditioner #TEATREEOI