Objective To investigate the clinical effect and security of Qiaoruisu Capsule on chronic bronchitis in acute stage caused by phlegm-heat stagnated in lung, and to explore the mechanism of this capsule.

• 研究目的:观察鞘蕊苏胶囊治疗慢性支气管炎急性发作期痰热郁肺证的临床疗效、安全性及探讨其部分治疗作用机理。