中西药合用，其目的是为了治疗疾病，但中药为含有多种有效成分的天然物，同西药一样具有疗效与毒性的两重性。中西药合用于一体，其相互作用十分复杂。故结合临床报道，作一浅析，供同道参考。１相互制约，降低毒副反应如甘草是中药汤剂及成药中最常用药物之一，主要成分是甘 Chinese and Western medicine, its purpose is to treat the disease, but the Chinese medicine is a natural substance containing a variety of active ingredients, with the same efficacy and toxicity of Western medicine has the duality. Combination of Chinese and Western medicine in one, its interaction is very complicated. Therefore, combined with clinical reports, make a brief analysis, for fellow reference. 1 mutual restraint and reduce side effects Such as licorice is one of the most commonly used drugs in traditional Chinese medicine decoction and medicine, the main component is Gan