<prompt> Treatment of psoriasis include all exceptRetinoidsMethotrexateCyclosporineOral corticosteroides  <response>: Unstable psoriasis may be brought under control with liberal application of topical bland emollient supportive therapy.Oral methotrexate, retinoids, cylosporine can be used; however, systemic steroids are usually avoided for the fear of precipitating pustular psoriasis upon withdrawal.Only in pregnancy with pustular psoriasis impetigo gestationis, steroids are drug of choice. 