Hyperhidrosis (HH) is sweating beyond that which is required for thermoregulation.1 Secondary HH, which is usually caused by an underlying medical condition or drug, may be seen in patients with spinal cord injury (SCI) and can negatively impact psychosocial well-being and quality of life (QOL) if not treated.1
Information on the current prevalence of HH is lacking. In 2004, one study projected the prevalence of HH in the U.S. to be 2.8%.2 A previous study found that about 27% of the 154 patients with SCI reported experiencing HH that was annoying, with 28 (14.6%) of those reporting no contributing somatic causes.3 Somatic causes of HH include autonomic dysreflexia, posttraumatic syringomyelia, or orthostatic hypotension.4
Autonomic dysreflexia is a syndrome that describes a dramatic increase in blood pressure (BP) in patients with spinal cord lesion at or above T6 and is characterized by exaggerated autonomic responses to stimuli that are innocuous to individuals without SCI.5,6 Noxious stimuli that may trigger autonomic dysreflexia include bowel or bladder distension or obstruction, urinary infection, catheter insertion, suprapubic palpation, or skin irritation.6 Syringomyelia, another somatic cause of HH, is a cystic lesion on the spinal cord that may develop secondary to congenital anomalies or SCI.6-8
The following case reports describe 2 patients with SCI with different diagnoses and presentations of HH. Both were treated with oxybutynin for HH.
Case 1 Presentation
Mr. J is a 49-year-old with C6-C7 SCI attributed to a motor vehicle accident 26 years before. He presented to the primary care clinic for a routine visit in a self-propelled wheelchair. His diagnosis included tetraplegia, muscle spasms, osteoporosis, chronic pain syndrome, benign prosthetic hypertrophy, neurogenic bladder, and neurogenic bowel. He was noted to have a bath towel around his neck to wipe sweat from his face and neck. He did not recall when this condition started; however, he reported a prior trial of diazepam 5 mg as needed in 2006 in the mornings and before transfers when sweating was usually worst. He continued to use diazepam because it helped with his muscle spasms but not with sweating. His other medications included oral baclofen, alendronate, ibuprofen, docusate sodium, tamsulosin, calcium/vitamin C supplement, and bisacodyl suppository.
The patient’s surgical history was significant for anterior discectomy with C6-C7 fusion, sphincterotomy, transurethral resection of the prostate, and right urethral stent placement for hydronephrosis in 2004. His cystoscopy and renal sonogram were within normal limits. On physical examination, his vital signs were within normal limits. However, his long-sleeved shirt was wet on the front, and his neck, chest, and arms also were moist from excessive sweating. During his transfer to and from his wheelchair, he was noted to have chattering of his teeth. The remainder of the physical examination was negative for any other acute findings.
Mr. J was prescribed a 30-day trial of oxybutynin 5 mg 1 tablet by mouth per day for HH. During a 3-week follow-up telephone call, Mr. J reported that the oxybutynin was working well; the sweating on his chest had improved and had resolved on his face. Except for mild dryness of mouth, he was tolerating the medication well. There were no changes in his neurogenic bladder, which was managed with an external urinary device.
Six months later, Mr. J reported that oxybutynin continued to work well, and he no longer had to travel with a towel. He was able to go to a football game, social activities were more enjoyable, and he was not embarrassed because of excessive sweating.
Case 2 Presentation
Mr. B is a 48-year-old with T12 paraplegia secondary to a motor vehicle accident in 1994. He called the primary clinic for a visit because he was concerned about cold clammy hands for the past 6 to 7 months when he woke up in the morning and sometimes throughout the day. He was preparing to start his first semester in college. His diagnosis included neurogenic bowel and bladder and muscle spasms. There was no history of posttraumatic syringomyelia, and his medications included baclofen, dantrolene, diazepam, and multivitamins.
Mr. B took tolterodine 4 mg/d for several years, and for unknown reasons, about 6 years previously the prescription was changed to oxybutynin 15-mg extended release for his neurogenic bladder. He continued to have urinary leakage between the every 4-hour intermittent catherization, and oxybutynin was increased to 10-mg tablet twice per day.
About 7 months prior to this appointment, Mr. B independently stopped the oxybutynin as he felt that it was not making a difference in the management of his neurogenic bladder. It was noted that his cold clammy hands started about the same time that he discontinued the oxybutynin. He could not recall whether he had this symptom prior to initiation of any medication. It was mutually decided to restart the oxybutynin at a lower dose, this time not for his bladder but for the HH. He was ordered a 30-day trial of a 5-mg tablet once per day. About 3 weeks later, he sent a secure message to report oxybutynin’s effectiveness and to request a refill.