Noble Formula Salicylic Acid Spray is our original Noble Formula Spray with pyrithione zinc (ZnP) .25% enhanced with salicylic acid 2%. As salicylic acid is one of only two ingredients approved by the FDA specifically for non-prescription treatment of psoriasis, patients with this condition may find this enhanced product especially effective. Salicylic acid is used on the skin to treat psoriasis and other dry, scaly skin conditions. Salicylic acid causes the skin to shed dead cells from its top layer by increasing the amount of moisture in the skin, making it easier to shed skin cells, softening the top layer of skin and decreasing scaling and dryness. Not available in a cream.