Ducray Kertyol S cream. States localized scaly body and scalp. Psoriasiform States. Instructions for use: In the body, apply one or two times a day for a month. On the scalp, apply at night, leave on and remove in the morning by washing with a specific dermatological shampoo for 15 consecutive days. COMPOSITION: Kertyol 2% (Ictyol oil 1%. Crotamiton 1%). Glycolic acid 1%. Keluamida 5%. Glycerol 10%.