Objective : This study evaluated the effect of Gui-Zhi-Tang(桂枝湯) on chronic cough.

Methods : Three patients who had a chronic cough were diagnosed by the Shanghanlun(傷寒論) Six meridian patterns diagnostic system (六經診斷體系) and treated with Gui-Zhi-Tang(桂枝湯) based on Shang-han-lun's 12th and 15th text. The treatment lasted more than 4 weeks. The severity of Chronic cough was evaluated by the questionnaire(symptom severity assessment) before and after administration of each treatment term.

Results : After the treatments, the patients' symptoms and results of the questionnaire improved.

Conclusions : This case study showed an effectiveness of using Gui-Zhi-Tang on chronÌc cough.

KeyWords : Shanghanlun(傷寒論), Six meridian patterns diagnostic system (六經診斷體系), Gui-Zhi-Tang(桂枝湯), Chronic cough