ACE and diabetes mellitus: The consensus of the Brazilian Society of Hypertension recommends ACE inhibitors for patients with creatinine less than 3 mg/dl, and particularly for those with proteinuria and/or diabetes, but suggests caution if prescribing these drugs to patients with creatinine higher than 3 mg/dl.3 In the latter case, creatinine should be reevaluated within a period of one week.