Methods 108 cases with essential hypertension were divided randomly into 2 groups:levamlodipine besylate and extended release nifedipine.Treatment lasted for 8 weeks.

• 持续平稳地控制血压达正常目标水平,能有效地预防和阻止心、脑、肾血管并发症的发生,是治疗高血压的关键。