真武湯原典出自傷寒論少陰病篇。少陰病相當於今日急性熱性傳染病之末期，凡適合真武湯者，多半以上非昏睡狀態即是體力沉衰、缺乏生氣。少陰病的真武湯雖與太陽病的葛根湯、少陽病的小柴胡湯同屬應用範圍廣泛之劑，但因其所主治的對象少陰病，一般都是氣息奄奄、生命垂危之末期的症狀─雜病除外─在治療使命上，其重要性遠出葛根湯、小柴胡湯之上。本篇針對真武湯臨床應用及病例做一個討論。

ZhenWuTang originates from Lesser Yin chapter in the "On Cold Damage". Lesser Yin disease is equal to the end stage of acute febrile infectious disease nowadays. The symptoms for ZhenWuTang are mostly drowsiness and fatigue. Although ZhenWuTang of Lesser Yin disease is listed as extensively used formulas with GeGenTang of TaiYang disease and XiaoChaiHuTang in Lesser Yang disease, it only focuses on Lesser Yin disease that shows end stage of life, except other miscellaneous diseases. It is therefore more important than GeGenTang and XiaoChaiHuTang. This article discusses the clinical application and a case study of ZhenWuTang.