Hypomagnesemia

Abnormally decreased serum magnesium concentration below the normal range (0.70-1.05 mmol/L or 1.7-2.3 mg/dL), often associated with neuromuscular, cardiac, and concurrent calcium and potassium abnormalities. Possible causes are dietary factors (poor nutrition, starvation, alcohol abuse), GI loss (vomiting, diarrhea, malabsorption due to celiac disease or gastric bypass), renal loss (diuretics, proton pump inhibitors, diabetes), and medications (cisplatin, amphotericin B).