Advise patients to drink at least 2 L daily; consider thiazide diuretics, citrate therapy and allopurinol for patients with “active” calcium stone formation.
American College of Physicians (ACP) Key Recommendations
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Increased fluid intake to achieve 2 L of urine output daily (weak recommendation; low-quality evidence).
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Drug therapy with a thiazide diuretic, citrate, or allopurinol for patients with active disease despite increased fluid intake (weak recommendation; moderate-quality evidence).