Case Presentation: A previously healthy 59-year-old male with newly-diagnosed hypertension and prediabetes presented to the emergency department following an unwitnessed syncopal episode on standing. He was found to have significant electrolyte abnormalities with critical values of potassium at 2.5, magnesium at 1.4, calcium at 6.3, phosphorus at 1.8, and a nonanion gap metabolic acidosis with [...]