[The interrelationship between calcium and magnesium homeostasis and its significance for the relapse-prevention treatment of calcium nephrolithiasis].

The correlation between the renal excretion of calcium and magnesium after an overload with 1000 mg of calcium is studied. The significant interrelations between the calcium and magnesium urine excretion point that there are close interrelations between their active tubular transport in the kidneys. The significantly higher magnesuria and the tendency toward a low serum magnesium level in patients with renal hypercalciuria require to take into account the hypermagnesuria. The oral treatment with magnesium which was prescribed in the past indiscriminantly to all patients with relapsing calcium nephrolithiasis is necessary only for patient with renal hypercalciuria.