中医治病,先求理法,后选方遣药。由药物配合成的方剂,是根据病情的需要,且在辨证立法的基础上,配伍适当药物,规定必要的剂量。历史上有名的方剂,除丸剂外,一般汤剂处方少则二三味,多则八九味,不蔓不枝,每味都抓住了它的实用价值,可知其立方遣药经过再四推敲,去其芜,而存其菁,不让一味药品在方中多余浪费。如有名的经方桂枝汤只有五味; Chinese medicine cures the disease, first seeks the law, after the election party sends the medicine. Formulated by drugs, according to the needs of the disease, and in accordance with the dialectical legislation, compatibility with appropriate drugs, the required dose. In the history of famous prescriptions, in addition to pills, the general decoction prescription is as little as two or three tastes, and more than eighty-nine flavor, not vines, branches, every taste has grasped its practical value, we can see that its cubic drug delivery after another four Scrutiny, go to the others, and save the essence, not to blindly waste medicine in the party. For example, there are only five flavors in the famous Fanggui Zhitang;