Most herbs have multifuncion characteristic which means one set of herb is one small formula. So it has very practical value to master the skill how to control the function of herbs in order to use it reasonably and safely. The author of this article looked back upon historically the course of taking shape of function of Ban Xia by the method of sorting out literature and concluded a part of compatibility usually used in clinic and characteristic of herb dose and processing. As a result, the author found that conclusion of function of Ban Xia stems from formulae used in clinic for a long period of time. Factors, such as surroundings of compatibility, herb dose and processing, etc, not only influence the functional direction of Ban Xia, but also form some functions of Ban Xia. This task makes a good try and accumulates valuable experiences for the study of controlling functional direction of herbs. |