药物是防病治病的重要工具。但药物也具有两重性(Dualism),其有利的一面可用于防治疾病,解除病人的疾苦,造福人类;另一方面也可危害机体,引起生理、生化机能的紊乱和结构变化等不良反应。由此发生各种症状和体征的疾病,即为药源性疾病(Drug induced diseases)。如果能注意合理而谨慎地用药,则可充分发挥药物的有利作用,而把不良反应减少到最低限度。反 Drugs are an important tool for disease prevention and treatment. However, the medicine also has dualism. Its beneficial side can be used to prevent and cure diseases, relieve the suffering of patients and benefit human beings. On the other hand, it can also endanger the body and cause adverse reactions such as physiological and biochemical disorders and structural changes. The resulting disease and signs of various diseases, namely drug-induced diseases (Drug induced diseases). If you can pay attention to reasonable and careful medication, you can give full play to the beneficial effects of drugs, and reduce adverse reactions to a minimum. anti-