Potassium Citrate Dosage for Kidney Stone Prevention

Dosing Guidelines

The American Urological Association recommends a dose of 30-80 mEq per day divided into 3-4 doses for patients with recurrent calcium stones and low urinary citrate to effectively prevent kidney stone formation 1
Potassium citrate is preferred over sodium citrate as the sodium load in the latter may increase urine calcium excretion 2
For uric acid stones, the recommended dosage is 30-80 mEq per day in three-to-four divided doses, with a target urinary pH of 6.0 4
For cystine stones, the recommended dosage is 30-80 mEq per day in three-to-four divided doses, with a target urinary pH of 7.0 and high fluid intake (at least 4 liters per day) 4, 5

Maintaining adequate fluid intake is essential to ensure sufficient urine volume 7
Restricting sodium intake (100 mEq/2,300 mg or less daily) can help enhance the efficacy of potassium citrate 8
Consuming ample fruits and vegetables can help counterbalance foods that confer an acid load 2
Thiazide diuretics can be considered in combination with potassium citrate for patients with hypercalciuria 9

Patients with severe renal impairment should be monitored closely as they are at risk of developing hyperphosphatemia 10
Sodium citrate should be avoided as the sodium load may increase urine calcium excretion 2