一、孕妇用药的一般原则众所周知,孕期用药对母子均有一定危害性。如孕期、特别是受精后3～5周用药(绝对敏感期)最易致胎儿畸形。根据动物实验,流行病学调查和先天畸型登记等统计,美国食品医药局把药物致畸的危险度分为A、B、C、D和X5类,其中A最安全,对胎儿无危险,以后危险度依次增加,X类对胎儿有损害,孕 First, the general principles of medication for pregnant women As we all know, medication during pregnancy have a certain harm to both mother and child. Such as pregnancy, especially after 3 to 5 weeks after fertilization (absolute sensitive period) most likely to cause fetal deformity. According to animal experiments, epidemiological surveys and registration of congenital malformations and other statistics, the United States Food and Drug Administration to the risk of teratogenic drugs divided into categories A, B, C, D and X5, of which A is the safest, no risk to the fetus, after The risk increases in turn, X damage to the fetus, pregnancy