<prompt> Vitamin D analogue calcitriol is useful in the treatment ofLichen planusPsoriasisPhemphigusLeprosy  <response>: Drugs for psoriasisTopical medicationsVitamin D calcipotrieneCool tarCorticosteroidsTree bark extract dithranolTopical retinoidsSystemic Psoralens Methoxsalen, trioxsalen Methotrexate Acitretin Etanercept Cyclosporine AlefaceptTacrolimus6-ThioguanineHydroxyureaTacrolimusAdalimumabPhoto therapyPUVA oral psoralen plus UV-ANarrow - band UV-B NB-UVB 