止咳药种类很多,但原理各不同。只有对症选药,才能取得理想的止咳效果,否则,不但起不到止咳的作用,而且还会招致副作用,适得其反。下面介绍几种常用止咳祛痰药的作用特点、适应范围以及使用时需要注意的事项。 Many types of cough medicine, but the principle is different. Only symptomatic drug selection, in order to achieve the desired cough effect, otherwise, not only can not play the role of cough, but also lead to side effects, counterproductive. The following describes several commonly used cough and expectorants characteristics of the role, to adapt to the scope and use of the need to pay attention to matters.