Is Increasing Fluid Intake Warranted for Kidney Stones?

In 2014, the American College of Physicians released a new guideline for preventing recurrent kidney stones in adults. For patients who have had 1 or more prior kidney stone episodes, the guideline recommends increased fluid intake spread throughout the day to achieve a urine volume of at least 2 L/day. However, the guidelines suggest that evidence for the efficacy of increasing fluid intake is weak, possibly leaving the impression that increasing fluid intake is not an important prescription for patients with kidney stones.

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