[Modified dithranol minute therapy of psoriasis vulgaris]

A modified application of 1% and 2% dithranol was tested in 63 psoriatic patients. There were no differences in efficacy between a very short application time (on/off) and that of 5-10 minutes tried on symmetrical lesions. On the whole, higher concentrations of dithranol (2%) were more effective with both short and longer application times. The dithranol tolerance seems to be better with the on/off-application, especially when the 2% preparation is used. In addition, we found a correlation between tolerance of 2% dithranol and the patient's skin type.