How do you advise patients with recurrent nephrolithiasis who also have chronic mild hyponatremia for which they limit daily fluid intake?  

Depending on the cause of hyponatremia, as you implied, our usual recommendation for recurrent stone formers to drink more fluid may be inappropriate or contraindicated. First, I would like to know the kidney stone composition. For example, if it is uric acid, we could prevent new stone formation a...