Drugs and dose of ingredients in Ephedra Decoction are modified and the roles of principal, assistant, adjuvant and guiding drugs in the prescription are different, its functions and indications are changed accordingly. In this paper, complicated change of prescription-compounding in the recipe is validated. Ephedra being used combination with Cinnamon Twig has a strong diaphoretic action. Cinnamon Twig is used as an adjuvant drug with the effect of reducing fever. Ephedra being used in conjunction with Bit...