对经方剂量的初步换算

Dosage conversion of classical prescription

关于经方的剂量,一直是历代医家研究的热点问题,近年来随着研究的深入,对经方原文记载剂量的现代度量衡折算研究有较大进展,目前多偏向于经方所记载1两等于13.92g或15.625g的观点。但是笔者认为,在古今用药方式变迁的实际前提下,不能简单的将仲景时期经方剂量的折算结果等同于当前临床实际。即"一两等于多少克"和"一两现在应当用多少克"这两个问题是不能划等号的。笔者在参阅既往研究成果的基础上,以经方所记载1两等于13.92g或15.625g进行折算,通过比较古今煎药、服药环节中的差异,以药物实际溶出率为指标,认为经方1两的换算范围小于5-8g(按1两=13.92g)或6-9g(按1两=15.625g)是比较符合当前临床实际的;而对于服法"不必尽剂"及其他特殊服法一类方的换算,在不同的方中存在差异,不能仅仅是机械地套用现代常规的一日两次的服法和常规服量。

The dosage of classical prescription has always been the hot spot problem of the past dynasties doctor research. In recent years, with the deepening of the research, converting the dosage of original records to modem measurement research has great progress, which now tends to the records of one tael is equal to 13.92g or 15.625g. But the author believes that, under the premise of drug administration in ancient and modem medicine, it can＇t simply be translated the dosage of ZHANG Zhong-jing period to the current clinical practice. That is to say ＇one tael is equal to how many grams＇ can not be the equivalent of ＇one tael is equal to how many grams being used＇. This paper refers to the previous research results, on the basis of conversion as ＇one tael is equal to 13.92g or 15.625g＇. Through comparing ancient and modem decoction, the differences of taking medicine, and drag dissolution rate, the author proposes that conversion range of one tael being smaller than 5-8 grams or 6-9 grams is accorded with current clinical practices. However, in view of other special drug administering methods and the differences existing in prescriptions, routine methods and dosages of taking medicine, such as, twice a day, can＇t be used mechanically.