Ducray Kertyol PSO Treatment Shampoo is a specialized care shampoo designed for scalps with thick and dry plaques. This dermatological treatment helps reduce plaques while gently cleansing the hair and scalp. This is a medicated shampoo specifically formulated for treating scalp conditions characterized by thick and dry plaques. The product comes in a 200ml bottle and is part of Ducray's dermatological treatment line. As this is a treatment shampoo, it should be used as directed by a healthcare professional.