A randomized, controlled trial comparing IV iron sucrose to oral iron in anemic patients with nondialysis-dependent CKD

Kidney Int. 2005 Dec;68(6):2846-56. doi: 10.1111/j.1523-1755.2005.00758.x.


Background: Although iron deficiency frequently complicates anemia in patients with nondialysis-dependent CKD (ND-CKD), the comparative treatment value of IV iron infusion and oral iron supplementation has not been established.

Methods: In a randomized, controlled multicenter trial, we compared the efficacy of iron sucrose, given as 1 g in divided IV doses over 14 days, with that of ferrous sulfate, given 325 mg orally thrice daily for 56 days in patients with ND-CKD stages 3 to 5, Hb < or =11 g/dL, TSAT < or =25%, and ferritin < or =300 ng/mL. Epoetin/darbepoetin therapy, if any, was not changed for eight weeks prior to or during the study.

Results: The proportion of patients achieving the primary outcome (Hb increase > or =1 g/dL) was greater in the IV iron treatment group than in the oral iron treatment group (44.3% vs. 28.0%, P= 0.0344), as was the mean increase in Hb by day 42 (0.7 vs. 0.4 g/dL, P= 0.0298). Compared to those in the IV iron group, patients in the oral iron treatment group showed a greater decline in GFR during the study (-4.40 vs. -1.45 mL/min/1.73m2, P= 0.0100). No serious adverse drug events (ADE) were seen in patients administered IV iron sucrose as 200 mg IV over two to five minutes, but drug-related hypotension, including one event considered serious, occurred in two females weighing less than 65 kg after 500 mg doses were given over four hours.

Conclusion: IV iron administration using 1000 mg iron sucrose in divided doses is superior to oral iron therapy in the management of ND-CKD patients with anemia and low iron indices.

Publication types

  • Clinical Trial, Phase III
  • Comparative Study
  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Administration, Oral
  • Aged
  • Anemia / drug therapy*
  • Anemia / etiology
  • Erythropoiesis / drug effects
  • Female
  • Ferric Compounds / administration & dosage*
  • Ferric Compounds / adverse effects
  • Ferric Oxide, Saccharated
  • Glucaric Acid
  • Hemoglobins
  • Humans
  • Injections, Intravenous
  • Iron / metabolism
  • Male
  • Middle Aged
  • Patient Compliance
  • Quality of Life
  • Renal Insufficiency, Chronic / complications*
  • Treatment Outcome


  • Ferric Compounds
  • Hemoglobins
  • Iron
  • Ferric Oxide, Saccharated
  • Glucaric Acid