Interruption of the renin–angiotensin system with angiotensin-I–converting enzyme inhibitors slows the progression of renal disease both in patients with type 1 diabetes and in nondiabetic patients who have overt nephropathy.1-3 However, postponing end-stage renal disease in patients with type 2 diabetes, the leading cause of chronic renal failure in many countries, remains an elusive goal. We undertook a study in patients with type 2 diabetes and nephropathy in order to determine whether the angiotensin-II–receptor antagonist losartan, alone or in combination with conventional antihypertensive therapy, would increase the time to a doubling of the serum creatinine concentration, the onset of end-stage renal disease, or death. In addition, we assessed the effects of losartan and placebo on the following secondary end points: a composite of morbidity and mortality from cardiovascular causes, proteinuria, and the rate of progression of renal disease.