“…Dapsone (50–200 mg/day), the main agent in SPD, inhibits the cytotoxic effects of peripheral neutrophils and may, as sulphapyridines, cause life‐threatening side‐effects including methaemoglobinaemia and haemolytic anaemia 1 . Corticosteroids, tacalcitol, etretinate, PUVA, acitretin, mebhydroline, ketoconazole, colchicine, mizoribine, minocycline, vitamine E, niacin and, recently, infliximab have also been proposed 1,3–9 …”