药物是治疗疾病的重要手段之一。药物的应用可以通过抑制或杀灭病原体,,增强人体的抗病能力,为人体彻底消灭病原体、促进疾病的痊愈,创造有利条件。如果应用得当,肌体会很快战胜病原体而使疾病痊愈,这就是药物的治疗作用。然而,事物总是一分为二的;在一定条件下,矛盾也可以互相转化。一方面,病原体具有适应环境、改变代谢途径、对药物产生耐药性的能力,从而使药物失去抗病效力。另一方面,药物本身也有危害的因素,它能引起很多常见的自发性疾病,或者产生与治疗无关的严重的副作用和不良反应,这就是人们所说的“药害”。 Medicine is one of the important ways to cure the disease. Drugs can inhibit or kill pathogens, enhance the body’s resistance to the disease, the body completely eliminate pathogens, promote disease recovery, and create favorable conditions. If applied properly, the body quickly overcome the pathogen and the disease healed, this is the therapeutic effect of the drug. However, things are always divided into two parts; under certain conditions, conflicts can also be transformed into one another. On the one hand, the pathogen has the ability to adapt to the environment, change metabolic pathways and become drug-resistant, so that the drug loses its disease-resistant efficacy. On the other hand, drugs themselves also have harmful factors, which can cause many common spontaneous diseases, or produce serious side effects and adverse reactions unrelated to treatment, which is what people call “drug injury.”