引起药物不良反应的因素众多。笔者根据工作实践 ,对年龄、性别及药物后遗效应与药物不良反应的关系作一浅析。1　年龄因素因婴幼儿的肝、肾功能、中枢神经系统、内分泌系统等发育尚未完善 ,易发生不良反应。如新生儿用氯霉素后容易引起灰婴综合征和肝内某些酶系统发育不完善 , Many factors that cause adverse drug reactions. According to the author’s practice, the author of the age, gender and drug effects and the adverse effects of drug reactions to make a brief analysis. 1 age factors due to infant liver and kidney function, central nervous system, endocrine system development is not yet perfect, prone to adverse reactions. Such as neonatal chloramphenicol easily lead to gray baby syndrome and liver some of the enzyme system development is imperfect,