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Twenty-six patients with acute myocardial infarction (mean delay time 6 hours after onset of symptoms) were randomized to control or nifedipine treatment (10 mg sublingually, followed by 10 mg every 6 hours for a total of 24 hours). Nifedipine reduced arterial blood pressure from 127/78 to 115/70 mm Hg at 30 minutes (p < 0.001) and continued to reduce the blood pressure significantly for 12 to...