Oxybutynin in primary hyperhidrosis: A long-term real-life study.

Hyperhidrosis is a condition of excessive sweating beyond physiological parameters that can seriously impair quality of life. This study aims to evaluate the oral oxybutynin effectiveness in hyperhidrosis, besides its tolerance and safety. In a real-life long-term study, 30 patients with primary hyperhidrosis and Hyperhidrosis Disease Severity Scale (HDSS) with score of at least two were submitted to a questionnaire to assess demographic data, HDSS and side effects of oxybutynin. Most patients were women (n = 23, 76.7%), median age was 40 years (range 12-70, SD 17.5) and 17(56.7%) had family history of hyperhidrosis. The most common hyperhidrosis form was axillary (n = 15, 50.0%), followed by palmoplantar (n = 8, 26.7%), cranio-facial (n = 11, 36.7%) and trunk (n = 5, 16.7%). Median duration of treatment was 2.4 years (range 1-6 years, SD 1.3). Thus, all patients used oxybutynin for at least 1 year, 30% for 2 years, 20% 3 years, 17% 4 years, and 3% 6 years. There was a significant improvement in HDSS score of patients (P < .001). This real life study suggests that oxybutynin is effective and safe for treatment of hyperhidrosis, both in children and adults, with mild and tolerable side effects, with significant improvement in HDSS.