Nodular prurigo is a distressing disease which is difficult to treat. Two patients with severe nodular prurigo were treated with cyclosporin for periods of 36 and 24 weeks, respectively, using doses of 3-4.5 mg/kg per day. In both cases there was a reduction in the severity of pruritus after 2 weeks
In order to study the dermal uptake, time course, and urinary excretion of polycyclic aromatic hydrocarbons, the concentration of 1-hydroxypyrene in urine was determined by means of high performance liquid chromatography with fluorescence detection before, during, and after the topical treatment