刍议经方剂量单位古今换算

Humble Opinion on Conversion of Dose Units in Classical Prescriptions from Ancient to Modern Times

经方的剂量应与东汉官制度量衡一致,且东汉官制度量衡的直接考证要比间接考证更有说服力。经方的剂量大多是按标准度量衡计量的,如"两""升""尺"等,也有按非标准度量衡进行计量的,如"个""枚""把"等。一般认为东汉时一升约为现代的200 m L,一尺约为现代的23 cm。经方的计量单位"两"的古今换算主要有两种说法:一种是"一两等于13. 75 g",另一种是"一两等于15. 625 g",但到底哪种说法更为接近仲景用药剂量的原貌呢,经方的古今换算不应是"一两等于3 g",但没有做"一两等于13. 75 g"和"一两等于15. 625 g"这两种折算比例的药效学对比实验研究,故经方的计量单位"两"的古今换算仍有探讨的必要。

The dose of a classical formula should be in accordance with the official system of the Eastern Han Dynasty,and the direct textual research on the official system of the Eastern Han Dynasty is more convincing than the indirect textual research.The dose of a classical formula is mostly measured by standard measures,such as"liang";"sheng";"chi"etc.,and also by non-standard measures,such as"ge","mei","ba"and so on.It is generally believed that one"sheng"in the Eastern Han Dynasty is about 200mL;one"chi"is about 23cm.The ancient and modern conversion of the unit of measurement"liang"has two main views:one is that one"liang"equals 13.75g,while the other is that one"liang"equals15.625 g.But which statement is closer to the original meaning of Zhongjing’s dose?The ancient and modern conversion of classical prescriptions should not be that one"liang"equals 3 g,but there is no comparative pharmacodynamic experimental study on the conversion ratio of one"liang"equaling 13.75 g and one"liang"equaling15.625 g.Therefore,it is still necessary to discuss the ancient and modern conversion of the unit of measurement of classical prescriptions.