Unverified75% confidenceTradeoffTime unknown
缓释铁剂(如硫酸亚铁缓释片)虽减少胃肠刺激,但会将铁运送到吸收较差的肠段,吸收率可能低于普通剂型,用刺激性换吸收率需权衡
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75%
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Long-term
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Unverified缓释型或肠溶型铁剂能减少胃部刺激,但会降低吸收率(铁主要在十二指肠吸收,缓释可能错过吸收窗口);追求疗效应选普通剂型随餐后服用93% similarUnverified缓释铁剂虽能减少胃肠道刺激,但铁的主要吸收部位在十二指肠和空肠上段,缓释剂型可能在铁未释放前就通过吸收部位,反而降低整体吸收率93% similarUnverified缓释包衣铁剂减少胃刺激,但会绕过十二指肠(铁主要吸收部位)在小肠下段释放,可能降低实际吸收率,两者不可兼得91% similarUnverified缓释/肠溶铁剂虽减少胃部刺激,但会使铁在十二指肠主吸收部位之后才释放,反而降低吸收率,胃肠可耐受者不必优先选缓释型91% similarUnverified采用三价铁(多糖铁复合物)形式,胃肠刺激明显小于硫酸亚铁等二价铁制剂,但相应地吸收率低于二价铁,需要更依赖体内转化89% similar
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