How diuretics cause hypomagnesemia?

Diuretics can cause hypomagnesemia primarily by increasing the excretion of magnesium in the urine. They promote diuresis, which enhances renal clearance of electrolytes, including magnesium. Additionally, certain types of diuretics, particularly loop diuretics, inhibit magnesium reabsorption in the renal tubules, further contributing to decreased serum magnesium levels. This can lead to symptoms associated with magnesium deficiency if not monitored and managed appropriately.