Topical steroids effective for scalp psoriasis

Corticosteroids of high or very high potency are more effective than vitamin D. The combination product of a corticosteroid and vitamin D is of small benefit over corticosteroid monotherapy. The combination product is superior to vitamin D alone. Corticosteroids of moderate, high and very high potency are similarly effective. There was not enough evidence to allow a final conclusion as to whether salicylic acid is of additional benefit in combination with corticosteroids. Little, and mostly unreliable, data suggested the efficacy of tar or dithranol preparations is limited. It might not make a difference whether corticosteroids are used once or twice daily.