Psoriderm Scalp Lotion Shampoo Psoriderm Scalp Lotion Shampoo is designed to treat scalp psoriasis (areas of raised, red, sometimes itchy, patches of skin, covered with silvery scales without any blistering or tenderness). Psoriderm Scalp Lotion Shampoo contains distilled coal tar which stops itching & restores normal skin development. Psoriderm Scalp Lotion Shampoo can be used by adults, the elderly & children.