Multicenter Randomized Active-controlled Study to Investigate Efficacy & Safety of IV FCM in Pediatric Patients With IDA

This is a Phase III, multicenter, randomized, active-controlled study that compares the efficacy and safety of FCM to oral iron in pediatric participants with IDA and a documented history of an inadequate response to oral iron therapy at least 8 weeks (56 days) prior to randomization. Participants who satisfy the inclusion requirements and no exclusion criteria will be eligible to participate in this study and enter into a screening phase to confirm eligibility. Randomization will occur via the Interactive Response Technology (IRT) system in a 1:1 ratio to either Group A, participants receiving FCM, or Group B, participants receiving oral iron (oral solution drops, elixir or oral tablets). Randomization will be stratified by baseline Hgb (\<10, ≥10 g/dL) and age (1 to \<12 years and ≥12 to 17 years). The oral ferrous sulfate formulation received will be based on the participant's age, such that infants and children (1 to \<4 years of age) will receive ferrous sulfate drops, children (≥4 to \<12 years of age) will receive ferrous sulfate elixir, and adolescents (≥12 to 17 years of age) will receive ferrous sulfate tablets. Participants who experience adverse clinical symptoms due to the oral iron during the treatment phase may have a weight-based dose of ferrous sulfate reduced from 6 mg/kg to 3 mg/kg. If the participant is receiving tablets, the dose will be reduced from one tablet taken twice daily to one tablet per day. Once randomized, all participants will return for efficacy and safety evaluations, including adverse events and laboratory assessments, on Days 7, 14, 28, and 35. Additional pharmacokinetic sampling and analyses will be performed for participants receiving FCM on Days 0 and 7.