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水合氯醛一般剂量无副作用,若每日应用,连续数周,可引起胎儿的肝脏损害。三聚乙醛一般亦无副作用,过量应用,新生儿在头一二日内嗜睡。过量应用巴比妥盐类药物,胎儿出现不同程度的抑制。产前几小时应用吗啡,可抑制胎儿呼吸,对早产儿更危险,严重的常可看到瞳孔缩至针头大及戒断综合征。哌替啶(度冷丁)则比较安全,反复应用可致宫内成瘾。水杨酸盐一般治疗量对胎儿毒性不大,近产期大
Chloral hydrate general dose without side effects, if daily application, for several weeks, can cause fetal liver damage. Trimethylacetal generally no side effects, excessive use of newborns in the first day or two days lethargy. Excessive use of barbiturates salts, the fetus showed varying degrees of inhibition. Morphine can be used for a few hours before delivery to suppress fetal respiration. It is more dangerous and serious for premature infants. It is often seen that the pupils shrink to large needles and withdrawal syndromes. Pethidine (meperidine) is more safe, repeated use can cause intrauterine addiction. Salicylate treatment of general toxicity to the fetus is not large, large near term