Would you add amiloride for patients with recurrent calcium nephrolithiasis who have hypercalciuria despite adherence to maximum dose thiazide, low sodium dietary intake, and low animal protein dietary intake?  

Amiloride does not lower urine calcium on a chronic basis. In one set of experiments, acute loading lowered urine calcium, but the effect was very brief. I use amiloride to prevent potassium wasting from thiazides and on and off in primary hyperaldosteronism, but it will not lower urine calcium in t...