无名异与蛇含石均为矿物类中药。无名异“状如黑石炭”,“似蛇黄而色黑”;蛇含石“圆重如锡,黄黑青色”。二者外形及大小相象,容易相互混淆,互为代用,故有的地区所售无名异为含褐铁矿的蛇含石。据现代分析认为,无名异主含锰(Mn),蛇含石主含铁(Fe)。铁与锰都是人体内所必需的元素,但二者作用不同。铁是体内血红蛋白的成分,缺铁时血红蛋白合成受阻,会造成贫血。而锰参 Anonymous and snakes are stone minerals. Unnamed “like black charcoal”, “like yellow snake and black color”; snake stone “round weight as tin, yellow and black cyan.” The shape and size of the two are similar, easy to confuse each other and use each other as substitutes. Therefore, some areas have no name for the snake-containing stone containing limonite. According to modern analysis, anonymity contains manganese (Mn) and snakes contain iron (Fe). Both iron and manganese are essential elements in the human body, but the two have different effects. Iron is a component of hemoglobin in the body. In the absence of iron, synthesis of hemoglobin is blocked and can cause anemia. Manganese