Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/23/2025

Kidney Stone Prevention and Management

Lifestyle Interventions

  • Increased fluid intake is recommended to prevent kidney stones, aiming for a urine volume of at least 2.5 liters daily, as suggested by the American Urological Association 1, 2
  • Dietary calcium should be maintained at 1,000-1,200 mg per day for calcium stone formers, according to the American Urological Association 1, 2
  • Sodium restriction to 2,300 mg daily is recommended to reduce urinary calcium excretion, as advised by the American Urological Association 1, 3
  • Limiting oxalate-rich foods is recommended for those with calcium oxalate stones and high urinary oxalate, as suggested by the American Urological Association 1

Pharmacological Management

  • Thiazide diuretics are recommended for calcium stones with hypercalciuria, as suggested by the American Urological Association 3, 4
  • Potassium citrate therapy is recommended for calcium stones with hypocitraturia, according to the American Urological Association 3, 4
  • Potassium citrate is first-line therapy for uric acid stones, aiming to increase urinary pH to 6.0, as recommended by the American Urological Association 5, 6
  • For cystine stones, potassium citrate is recommended to increase urinary pH to 7.0, along with high fluid intake, as suggested by the American Urological Association 5, 6

Dietary Supplements and Kidney Stone Risk

  • Vitamin C supplements should be discontinued in calcium stone formers with hyperoxaluria, as they can increase urinary oxalate excretion by 22%, according to the National Kidney Foundation 7, 8
  • Cranberry supplements may increase urinary oxalate concentrations, increasing stone risk, as reported by the American Society of Nephrology 9
  • Supplemental calcium may increase stone formation risk by 20%, as suggested by the American Urological Association 1, 2

Monitoring and Follow-up

  • A 24-hour urine specimen should be obtained within six months of initiating treatment to assess response, as recommended by the American Urological Association 5, 6
  • Annual 24-hour urine specimens are recommended for ongoing monitoring, according to the American Urological Association 5, 6
  • Periodic blood testing is necessary to assess for adverse effects of pharmacological therapy, as suggested by the American Urological Association 5, 6