Objective:To observe the therapeutic effect of felodipine in treatment of primary hypertension.Methods:Among 98 patients with primary hypertension (60 male,38 female,aged 56±4 years) recruited in the outpatient department,81 were treated with oral intake of 5 mg of felodipine once a day for a total of 8 weeks; 17 with the same dose of felodipine plus captopril.Results:The total effective rate was 90.8%,with 49.0% of the patients showing a significant improvement.Conclusion:Felodipine is effective for the treatment of primary hypertension,it can decrease the SDP up to 3.9±0.4 kPa.Meanwhile,the side effect is mild.