 Shivering is a common post-anesthetic complication occurring in up to 65 of patients undergoing spinal or epidural anesthesia. Shivering may interfere with electrocardiogram, blood pressure and oxygen saturation monitoring. In addition, shivering increases oxygen consumption, carbon dioxide production and metabolic rate by up to 400. Thus, it may result in problems in patients with low cardiac and pulmonary reserves. Preventing shivering could therefore result in better postoperative outcomes or reduce the incidence of post-surgical complications. 