Objective:To investigate the clinical effects of threatened preterm nifedipine.Method:60 cases of threatened premature labor in pregnant women were randomly divided into three groups,each of 20 cases.Observation group 1 was given nifedipine 10 mg,observation group 2 was given nifedipine 20 mg,the control group was given hydrochloric acid Toledo monarch.Compared three groups prolong delivery time points,pregnancy outcomes and side effects.Result:Observation group 1 and observation group 2 were markedly time significantly shorter than the control group(P<0.05);the control group to postpone childbirth shorter time than in the observation groups,the difference was statistically significant(P<0.05);observation group 2 was significantly higher birth weight than the other two groups (P<0.05);spend of the control group was significantly higher than the observation group 1 and observation group 2 (P<0.05).Conclusion:Nifedipine has better prevention and treatment of threatened premature labor,safety,low economic cost,recommended as the drug of choice threatened premature labor.%目的：探讨硝苯地平治疗先兆早产的临床效果。方法：将60例先兆早产孕妇随机分为三组，各20例。观察1组给予硝苯地平10 mg，观察2组给予硝苯地平20 mg，对照组服用盐酸托利君。对比三组延长分娩时间、妊娠结局及副反应。结果：观察1组和2组显效时间较对照组显著缩短（P<0.05）；对照组分娩推迟时间较观察组短，差异具有统计学意义（P<0.05）；观察2组新生儿体重显著高于其他两组，差异具有统计学意义（P<0.05）；对照组花费显著高于观察1组和观察2组，差异具有统计学意义（P<0.05）。结论：硝苯地平防治先兆早产效果较好，安全性高，经济成本低，建议将其作为先兆早产的首选药物。
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