药物不良反应，是指在预防、诊断、治疗疾病或调节生理机能过程中，病人接受常规用法、用量的药物时所出现的有害反应。可以说，只要用药，就有发生不良反应的可能。例如，抗凝血药（肝素或华法林）可导致出血，抗焦虑药（安定或利眠宁）可引起嗜睡。此外还有一种与药物正常药? Adverse drug reactions, refers to the prevention, diagnosis, treatment of disease or regulation of physiological function, the patient accepted the conventional usage, the amount of drugs when the adverse reactions occur. It can be said that as long as medication, there is the possibility of adverse reactions. For example, anticoagulants (heparin or warfarin) can cause bleeding and anti-anxiety drugs (diazepam or chlordiazepoxide) can cause drowsiness. In addition, there is a normal drug with drugs?