OBJECTIVE To study the pharmacodynamics of psoralen gel on experimental vitiligo modles.METHODS The vitiligo models were produced by chemical decoloration method,then the models were respectively treated with three different dosages of psoralen gel,and 8-MOP tincture was used as the positive control.Observed the distribution of the skin melanin and determined the activity of acetylcholinesterase and tyrosinase.RESULTS The psoralen gel showed good effects on the animal models.It highly improved the skin mela...