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中医方剂根据组成是单味药还是多味药命名单方和复方。复方是从单方发展而来,它更能适合复杂病情的需要,加上疗效较高,故历来受到医家的欢迎。中医复方虽由几种单味药组成。但其作用绝不能简单地用其组成药物的单一作用来解释。如由鬼针草和臭梧桐组成的针桐合剂,单用其中任何一味,均无明显的疗效,但两者的合剂对大白鼠因注射甲醛或蛋白引起的踝关节肿胀则有明显的抑制作用。因此,这是单味药配伍成方剂后,在相互作用的情况下所产生的综合效应,故称为综合作用。又如日人中山恒明研究一种抗癌方,由藤瘤、诃子、菱实、薏苡仁四味药组成,在实验中证明,除米仁
Chinese medicine prescriptions are named single and compound based on whether they consist of single or multi-taste drugs. Compound is developed from unilateral, it is more suitable for the needs of complex conditions, with a higher efficacy, it has always been welcomed by medical doctors. Although the Chinese medicine compound consists of several kinds of single herbs. But its role must not be simply explained by the single role of its constituent drugs. For example, Needlewort mixture consisting of Bidens pilosa and S. japonica has no obvious curative effect when used alone, but the combination of the two has a significant inhibitory effect on the swelling of the ankle caused by injection of formaldehyde or protein in rats. . Therefore, this is a comprehensive effect produced by interaction of a single herb after it has been formulated into a prescription. Another example is the study of an anti-cancer drug by the Japanese person Heng Ming Zhongshan. It consists of four herbs: vine tumor, gardenia, rhizoma, and barley.