Angiotensin converting enzyme inhibitors versus calcium antagonists in the treatment of diabetic hypertensive patients.

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Abstract
Angiotensin converting enzyme inhibitors and calcium antagonists are effective agents for controlling high blood pressure in diabetic patients. We selected 30 type II diabetic patients with proteinuria and evaluated the effect of these drugs on renal function and proteinuria. In a double-blind trial, patients received either 40 mg/day enalapril or 40 mg/day nifedipine during 12 months. They also received a hypoproteic diet with 0.8 g/kg wt/day of protein. In the enalapril group (10 men and eight women), mean arterial blood pressure was 112.0 +/- 12 mm Hg, creatinine clearance was 58.6 +/- 12.4 ml/min, and 24-hour proteinuria was 4.36 +/- 3.23 g/24 hr before treatment. After treatment, mean arterial blood pressure was 82.0 +/- 8.30 mm Hg (p less than 0.001), creatinine clearance was 66.6 +/- 13.8 ml/min (NS), and 24-hour proteinuria was 0.56 +/- 0.78 g/24 hr (p less than 0.001). In the nifedipine group (six men and six women), mean arterial blood pressure was 114.0 +/- 8.0 mm Hg, creatinine clearance was 67.8 +/- 19.6 ml/min, and 24-hour proteinuria was 2.84 +/- 1.31 g/24 hr before treatment. After treatment, mean arterial blood pressure was 86.0 +/- 7.0 mm Hg (p less than 0.001), creatinine clearance was 51.4 +/- 7.9 ml/min (p less than 0.001), and 24-hour proteinuria was 2.66 +/- 0.89 g/24 hr (NS). These results show a similar hypotensive action and different renal effects between these two drugs after 12 months of treatment.

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