药品不良反应主要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,或意外的有害反应。即使是比较安全的非处方药也是如此,它有防病药品在规定常用剂量使用时出现的与防病治病目的无关的作用,这里强调应用“目的”,因为一种药物往往有多种作用、目的不同,其他作用就成为副作用了。如阿托品用于沿疗胃痛时,常出现口干,心跳加快等副作用。如用于治疗有机磷农药中毒, Adverse drug reactions mainly refers to the qualified drugs appear in the amount of normal usage, and has nothing to do with the purpose of medication, or accidental adverse reactions. Even relatively safe over-the-counter medicines are such that there is an effect that anti-retroviral drugs have nothing to do with the purpose of disease prevention and treatment when they are prescribed for common doses. The emphasis here is on “purpose” because a drug often has multiple functions and aims Different, other effects become a side effect. Such as atropine for the treatment of stomach pain, often dry mouth, rapid heartbeat and other side effects. If used to treat organophosphorus pesticide poisoning,