Abstract
The lack of comparative studies of nifedipine and felodipine using 24-h blood pressure (BP) monitoring in the same patients led to the present study evaluating the antihypertensive efficacy and side effects of treatment with slow-release (SR) nifedipine (20 mg twice daily) and extended-release (ER) felodipine (10 mg once daily). In the double-blind study, subjects were randomly assigned to one of two treatment groups: 6 weeks of nifedipine SR (20 mg twice daily) followed by 6 weeks of felodipine (ER) (10 mg once daily with evening matched placebo), or vice versa. Twenty-four-hour ambulatory BP monitoring showed no significant differences in systolic BP (SBP) during the day. There were no significant differences in diastolic BP (DBP) throughout the 24 h, although the frequency of DBP recordings > 90 mm Hg was greater during nifedipine (33.1%) than felodipine (27.75%) treatment. The most common side effects were flushing, palpitations, headaches, and ankle edema; there were no adverse effect on lipid profile or glucose level.
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