合理用药的主要任务是根据病情选用最适当的药物以发挥药物的最大效用,同时尽量避免药物的不良反应。近几十年来,由于新药大量涌现,人们接触的药物越来越多,同时由于医药科学的发展,人们对药物反应的认识水平不断提高,药物反应有越来越多、越来越严重的趋势。有时用药物治好了某病却又引起了其它的病,甚至原来的病未治好而引起了其它更 The main task of rational drug use is based on the condition of the most appropriate choice of drugs to maximize the effectiveness of drugs, while trying to avoid the adverse drug reactions. In recent decades, with the massive emergence of new drugs, more and more people have been exposed to the drugs. At the same time, due to the development of medical science, people’s awareness of drug reactions is constantly increasing, and drug reactions are more and more and more and more serious . Sometimes cure the disease with drugs but cause other diseases, even if the original disease is not cured and caused other more