Effectiveness and safety of an on-demand ferric carboxymaltose infusion strategy in patients with inflammatory bowel disease: a real world experience.

Background: We evaluated an on-demand ferric carboxymaltose (FCM) infusion strategy in inflammatory bowel disease (IBD) patients with iron deficiency anemia (IDA).
Aims: The primary outcome was the response rate to single or multiple FCM infusions after 12 months. Secondary outcomes were the response rate to a single FCM infusion after 3 months and the FCM safety profile.
Methods: We retrospectively included 185 IBD patients who received at least one FCM infusion of 500 mg, between 2015 and 2018. FCM was administered to patients with Hb ≤10 g/dL and hypoferritinemia and repeated according to the physician's assessment. Complete response (CR) was defined as Hb ≥12 g/dL (≥13 g/dL for men) or Hb increase ≥2 g/dL. Partial response (PR) was defined as an Hb increase between 1 and 2 g/dL. A univariate analysis was performed at 3 and 12 months.
Results: After 12 months, the response rate was 75.1% (CR, 48.6%; PR, 26.4%; mean number of FCM infusions, 1.7 ± 1.1). In total 169/185 patients received a single FCM infusion during the first 3 months and 79.2% achieved response (CR, 56.8%; PR, 22.4%). At univariate analysis, no variable was associated with response. No adverse events were reported.
Conclusions: An on-demand strategy was effective and well-tolerated in treating IDA in IBD patients.
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