Diabetic autonomic neuropathy is a common complicationof diabetes, and is present in up to 40% of insulin-dependent dia-betic patients [1]. While the pathogenesis of diabetic auto-nomic neuropathy remains unknown [2], the Diabetes Control and Complications Trial (DCCT) indicates that hyperglycemia is critical in the development of diabetic complications, in-cluding autonomic neuropathy [3—5]. The risk of cardiorespiratory arrest due to autonomic neuropathy is increased in diabetic patients [1], and 5-year mortality from postural hypotension due to sympathetic dysfunction approaches 60%[1].