药品不良反应(ADR)是指合格药品在正常用法用量下出现的与用药目的无关的有害反应。该定义包含以下几几点含义:1、不良反应是药物所具有的两重性之一,完全没有不良反应的药物是不存在的;2、必须具备三个性质:合格药品、正常用法用量、与用药目的无关的或意外的有害反应.我国2011年7月1日起实施的《药品不良反应报告和监测管理办法》中明确规定:“药品不良反应报告的内容和统计资料是加强药品监督管理、指导合理用药的依 Adverse Drug Reactions (ADR) refers to the harmful drugs that are not related to the intended purpose of the drug at normal usage levels. The definition includes the following several meanings: 1, adverse reactions are one of the duality of the drug has no adverse reactions of the drug does not exist; 2, must have three properties: qualified drugs, the amount of normal usage, and medication Purpose unrelated or unexpected harmful reactions.China’s July 1, 2011 implementation of the ”Adverse Drug Reaction Reporting and Monitoring Management“ clearly states: ”Adverse drug reactions report content and statistical information is to strengthen drug supervision and management, Guide the rational use of drugs