古医籍和目前的教材指出:矿石类、贝壳类、角甲类及有毒的药物先煎;气味芳香、含挥发油多的、不宜久煎的药物后下;花粉类、含淀粉、粘液质较多、附绒毛的药物包煎,还有烊化、冲入、溶化、另煎兑入、生汁兑人、冲服等.上述方法中不少与中药研究的新成果不符,且不是最佳方法.因此,某些传统煎法已不通适应中医药学发展的需要.下面举些例子加以说明. Ancient medical textbooks and current textbooks point out that minerals, shellfish, horns, and poisonous drugs are fried first; odors are aromatic, contain more volatile oils, and should not be decocted for a long time; pollen, starch-containing, and mucoid are more , Fugitive drug package fried, as well as simmering, leaching, melting, another fried into, raw juice against people, blunts, etc.. Many of the above methods and the new results of traditional Chinese medicine research does not match, and not the best method. Therefore, some traditional decoctions can no longer meet the needs of the development of traditional Chinese medicine. Here are some examples to illustrate.