◎方  名：八正散（利濕之劑）

   總  結：濕熱便秘                                                               

   編  號：019                                                                    

   組  成：瞿麥、扁蓄、車前子、木通、滑石、山梔子、大黃、燈芯、甘草               

   主  治：治濕熱下注，咽干口渴，少腹急滿，小便不通，或淋痛尿血，或因熱為腫。     

   歸  經：手足太陽足少陽藥也                                                     

   方  義：(1)1.梔子、大黃─苦寒下行。                                            

              2.滑石─利竅散結。                                                  

              3.此皆瀉熱而兼利濕者也。                                            

           (2)1.車前─清肝熱而通膀胱，肝脈絡于陰氣，膀胱津液之府也。              

              2.木通、燈草─清肺熱而降心火，肺為氣化之源，心為小腸之合也。        

              3.瞿麥、扁蓄─降火通淋。                                            

              4.此皆利濕而兼瀉熱者也。                                            

           (3)甘草合滑石為六一散。用梢者，取其徑達莖中，甘能緩痛也。              

           (4)雖治下焦而不專于治下，必三焦通利，水乃下行也。                      

   又附方：一方加木香。                                                           

   煎服法：加燈草煎。