Case Presentation: A 62-year-old man with a history of diabetes presented to the emergency department with altered mental status (AMS) and increased urinary frequency. The patient was conscious but oriented only to self. Initial evaluation revealed hyponatremia (serum sodium: 125 mmol/L) with mild hyperglycemia (186 mg/dL). Further assessment of hyponatremia showed a serum osmolality of [...]