Oxybutynin treatment for buprenorphine-naloxone-induced hyperhidrosis

Hyperhidrosis occurs when sweating is excessive for thermoregulatory purposes, which may result in decreased quality of life and emotional stress for patients.1 Classified as primary and secondary, secondary hyperhidrosis is often related to an underlying cause.2 Certain medications have been reported to induce hyperhidrosis, including selective serotonin reuptake inhibitors, tricyclic antidepressants, and opioid agonists.2, 3, 4 We present the case of a woman with a history of opioid use disorder who experienced hyperhidrosis in the setting of partial opioid agonist and opioid antagonist therapy (buprenorphine-naloxone), who was treated successfully with oral oxybutynin 5 mg daily.