PURPOSE
To evaluate if low molecular weight iron dextran (LMWID) is a safe and effective alternative to iron sucrose for intravenous iron administration.
BACKGROUND
In recent years, intravenous iron administration has increased due to clinical indications and rapid iron repletion. Early IV iron formulations had safety concerns that precluded widespread use. High molecular weight iron dextran was removed from the US market in 2009 due to safety concerns. Since then, several new IV formulations including LMWID and iron sucrose have been approved with a favorable benefit risk profile. While recent evidence and guidelines indicate that LMWID and other iron formulations have comparable safety profiles, no head-to-head comparisons exist. Both iron sucrose and LMWID are used for the treatment of IDA in Veterans Affairs hospitals. Iron sucrose is given 200 mg weekly for 5 weeks, while LMWID is given as a single 1-gram dose over 3 hours. We conducted a retrospective crosssectional analysis to compare the safety and efficacy of IV LMWID to IV iron sucrose.
METHODS
We identified 129 patients (LMWID: n=29, iron sucrose: n=100) who received intravenous iron from 01/01/2022 to 03/03/2023. To match the sample size, we selected every 3rd patient from the iron sucrose group (n=33). We captured data on infusion-related reactions, history of asthma/inflammatory bowel disease/> 2 drug allergies, overall and ≥ 2 g/dL hemoglobin increase, and treatment cost. Descriptive statistics were used to describe the safety and efficacy parameters. An unpaired t-test was used to calculate statistical significance of the cost.
RESULTS
We found that 82.7% of the patients who received LMWID had an increase in hemoglobin vs. 60.6% in the iron sucrose group. 48.3% of patients in LMWID had ≥ 2 hemoglobin increases vs. 27.3% in the iron sucrose group. The cost for LMWID administration was $2016.10, compared to $2315.40 for administration of IV iron sucrose cost. Two-tailed p value < 0.0001 indicating the observed difference to be statistically significant. No infusion reactions were observed in both groups.
CONCLUSIONS
In this single center analysis, IV LMWID administered provided comparable safety, and improved effectiveness, and cost-effectiveness to iron sucrose.