Refeeding Syndrome Induced by Fursultiamine Infusion in Wernicke Encephalopathy: A Case Report

Wernicke encephalopathy is caused by thiamine deficiency, and treatment with high-dose thiamine is recommended for its management. We herein report the case of an older adult woman who developed refeeding syndrome after receiving intravenous fursultiamine. Although the patient's oral food intake was restricted to prevent refeeding syndrome, the total caloric load, including glucose contained in fursultiamine, exceeded the recommended amount. This case demonstrates that the caloric contribution of glucose present in fursultiamine should not be overlooked when treating Wernicke encephalopathy with high-dose parenteral fursultiamine.