十八反,即中药的配伍禁忌。它是古人长期实践之经验总结,后人在临床用药时都严加遵循。《中国药典》1963年版规定:注明畏、恶、反者,系指一般情况不宜使用。《中国药典》1977年版原来的相反、相畏,仍称“不宜使用”。也有人认为“中药十八反”均无科学根据,没有什么实际意义。古人制方亦不拘于此,如海藻、甘草 Anti-eighteen, that is, incompatibility of traditional Chinese medicine. It is a summary of the long-term practice of the ancients. Later generations strictly followed the clinical medication. The 1963 edition of the Chinese Pharmacopoeia stipulates that indifference, evil, and antithesis mean that the general situation is not suitable for use. The opposite of the original version of the Chinese Pharmacopoeia in 1977 was still called “not suitable for use.” Some people think that there is no scientific basis for the “18 anti-Chinese medicines” and there is no practical significance. The ancients system is also not limited to this, such as seaweed and licorice