现在一般临床医生在为病人开处方时,常采用联合用药的方法。这是因为1.病人同时患多种疾病或有多种症状需要联合用药;2.企图通过药物相互作用来提高药效和降低不良反应。据统计,多种药物联合的不良反应率,5种以下者约4.2％,20种以上者增长至45％。 Nowadays, when clinicians prescribe for their patients, they usually use the combination method. This is because 1. The patient suffers from multiple illnesses or multiple symptoms at the same time and needs combination therapy; 2. Attempting to improve the efficacy and reduce adverse reactions through drug interactions. According to statistics, the adverse reaction rate of multiple drugs combined, about 5 kinds of about 4.2%, 20 kinds of more than 45%.