水，对中药材有较强的穿透力，可溶解中药材中的生物碱、甙类、有机酸、鞣质、蛋白质、糖类、多糖类和无机盐等有效成分，是煎煮中药的最常用溶媒。在实践中，笔者观察到煎药用水的质与量，煎煮的时间与方法，对药效均有较大的影响，简述如下。１　水１．１　水质：对煎药用水 Water, which has strong penetrability for Chinese herbal medicines, can dissolve active ingredients such as alkaloids, terpenoids, organic acids, tannins, proteins, sugars, polysaccharides and inorganic salts in Chinese herbal medicines. The most commonly used solvent. In practice, the author observed that the quality and quantity of decocted water, the time and method of decocting, have a greater impact on the efficacy of drugs, as outlined below. 1 Water 1.1 Water quality: water for decocting