Salicylic acid
What is salicylic acid and how does it work?
Salicylic acid, also known as "sal acid," helps remove scales and is often combined with topical steroids, anthralin or tar to enhance effectiveness. Salicylic acid comes in many OTC topical forms: cream, gel, lotion, ointment, pads, plaster, shampoo, soap and solution. Salicylic acid is available over the counter in concentrations up to 3%; concentrations more than 3% are only available with a doctor's prescription. Strong salicylic acid preparations can cause irritation if left in contact with the skin too long. Salicylic acid can also be compounded with other ingredients by a pharmacist with a doctor's prescription.
Other scale removers include urea, lactic acid and phenol. For more information about salicylic acid and other scale removers, see scalp psoriasis.
Updated June 2006
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