Hyperhidrosis is the excessive production of sweating, which can be primary and
focal or secondary to various pathologies. The exact cause of primary focal
hyperhidrosis is still unknown, although a genetic basis is recognized, and its
prevalence varies from 1% to 2.8%. The most affected sites are the armpits,
palms, soles and face. It causes much discomfort, affects the quality of life,
and is estimated to be undervalued by health professionals. Many treatment
options are proposed, both clinical and surgical. The aim of this review is to
focus on the treatment of hyperhidrosis with oxybutynin, an anticholinergic drug
originally used to control overactive bladder.