Unverified85% confidenceTradeoffTime unknown
口服铁剂胃肠刺激（便秘/黑便/恶心）是常见弃用原因，甘氨酸亚铁、多糖铁复合物等有机铁/螯合铁副作用明显小于硫酸亚铁，肠胃敏感者应选螯合形式而非二价无机铁盐
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85%
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Long-term
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Unverified二价铁吸收好但对胃刺激大、易致便秘和黑便；甘氨酸亚铁螯合铁形式肠胃刺激最小，胃肠敏感者应优先选螯合铁而非普通硫酸亚铁90% similarUnverified富马酸亚铁形态对胃肠刺激中等偏上，空腹服用容易引起恶心、便秘或胃部不适，胃肠敏感者建议随餐服用或考虑螯合铁/甘氨酸铁类产品90% similarUnverified铁剂形式为富马酸亚铁，吸收率较高但对胃肠道敏感人群可能引起便秘、恶心等不适，肠胃较弱者需注意90% similarUnverified铁形式为富马酸亚铁，相比硫酸亚铁胃肠刺激较小，但仍可能引起便秘或黑便，肠胃极敏感者需留意90% similarUnverified铁形式影响吸收和肠胃反应：甘氨酸亚铁（螯合铁）比硫酸亚铁便秘/反胃副作用更小，孕吐或肠胃敏感者优选螯合铁型90% similar
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