阿摩線上測驗
65.有關口服鐵劑的敘述，下列何者錯誤？
(A)ferrous salt口服吸收較ferric salt好
(B)ferrous sulfate 325 mg tid提供195 mg elemental iron
(C)服用鐵劑時加上100 mg vitamin C能大幅增加吸收率
(D)長效型鐵劑雖可降低腸胃道副作用，卻會降低吸收
統計： A(503), B(739), C(2667), D(606), E(0) #1631395
詳解 (共 10 筆)
口服2價
CKD 200mg/d
飯前，酸性吸收佳，配250mg VitC
含量記法望文生義 sulfate佔1/5 fumarate佔1/3 gluconate佔1/10
注射3價
sucrose比dextrose安全
(C)服用鐵劑時加上 1000mg vitamin C能大幅增加吸收率
阿摩線上測驗: http://www.yamol.tw/reponse.php?id=35493489&dostatus=&noslave=1&exp=1300#ixzz55KYY9kj0
(C)服用鐵劑+250mg vitamin C
為了減少胃腸道的副作用，亦有腸溶膜衣與緩釋劑型的鐵劑，但因鐵質的吸收主要於十二指腸和空腸，此種劑型的鐵劑鐵質吸收率較低。
鐵劑中的二價鐵在酸性環境中吸收最好，所以服用鐵劑時，建議併服250 mg的維他命C以增加鐵質的吸收
rf. http://www.taiwan-pharma.org.tw/weekly/1722/1722-5-3.htm
Simultaneous consumption of 25-100 mg of vitamin C has been shown to increase the absorption of nonheme iron by four-fold. However, an excess of 200 mg of vitamin C per 30 mg of elemental iron is required to enhance the absorption of highly available iron salts, such as ferrous sulfate.
rf. https://www.globalhealingcenter.com/natural-health/heme-iron-vs-nonheme-iron/
Ferrous sulfate = 20% elemental Fe
Koda-Kimble & Younger's Applied Therapeutics 10ed Ch 12 Anemia p237
(C) smaller doses of vitamin C (e.g., 100 mg) do not significantly alter iron absorption