Two cases of acute renal failure associated with ticrynafen administration are reported. Both patients had received hydrochlorothiazide prior to the institution of ticrynafen therapy and were mildly hyperuricemic. Flank pain, oliguria, and azotemia developed after the institution of ticrynafen in both cases. Clinical and laboratory features were consistent with acute uric acid nephropathy in both patients. In addition, a newly formed collection of radiolucent material was found by intravenous urography in the renal pelvis of one of the patients. Both patients were treated with intravenous fluids and sodium bicarbonate. One of the patients received allopurinol as well. Complete recovery of renal function was observed in both patients. Ticrynafen-induced hyperuricosuria in these previously volume-depleted and hyperuricemic subjects is felt to have been responsible for intrarenal and extrarenal deposition of uric acid in our patients.
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