Treatment of excess sweating of the palms by iontophoresis.

Eighteen subjects were treated for palmar hyperhidrosis by tap water iontophoresis. Only one hand was treated; the other served as a control. Fifteen of the 18 subjects became euhidrotic. Iontophoresis is a suitable alternative to long-term drug therapy and should be offered to patients for the control of palmar hyperhidrosis prior to surgical intervention.