RESUMO
Loop diuretics are commonly prescribed within different clinical settings to prevent and or to treat acute renal failure. In most cases they facilitate fluid management following an increased urine output. Experimental models in animals revealed protective effects of loop diuretics in acute renal failure. Several clinical trials have failed to outline better outcomes associated with the use of diuretics in acute renal failure as there was no recovery in renal function nor a reduction in the number of dialysis sessions required. Glomerular filtration rate did not improve with the administration of loop diuretics after continuous renal replacement therapy. The administration of loop diuretics in the management of acute renal failure should be mainly restricted to patients with hypervolemia.