26th June 2023

A 50-year-old man with recurrent nephrolithiasis was investigated

A 50-year-old man with recurrent nephrolithiasis was investigated. Renal function tests and serum calcium measurements were normal. A 24-hour urine collection revealed the following:


Volume	3L
Calcium	15 mmol/24h	(2.5-7.5mmol/24h)
Oxalate	200 mmol/24h	(90-450 mmol/24h)
Uric Acid	2.54 mmol/24h	(1.48-4.45 mmol/24h)
Citrate	1.0 mmol/24h	(0.3-3.4 mmol/24h)

Which one of the following options would be the most appropriate management in this case?

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