Comparative Impact of Intravenous Iron Sucrose and Ferric Carboxymaltose on Hypophosphatemia and Anemia Parameters in Iron Deficiency Anemia: A Retrospective Study.

Aim: This study aimed to determine the incidence of hypophosphatemia and evaluate anemia parameters following intravenous iron sucrose (IS) and iron carboxymaltose (FCM) therapy in patients diagnosed with iron deficiency anemia (IDA).

Methods: This retrospective study included 108 patients aged 18-67 who were diagnosed with IDA and received either FCM or IS therapy. The patients were divided into two groups: iron sucrose (n=55, 51%) and ferric carboxymaltose (n=53, 49%). We collected and analysed data on patient demographics, doses of FCM and IS, and laboratory parameters including serum phosphorus, ferritin, total iron-binding capacity (TIBC), iron, and haemoglobin (Hg) values.

Results: The pre-treatment blood phosphorus levels were significantly lower in the IS group than in the FCM group (p = 0.029). Following intravenous iron treatment, the TIBC and phosphorus levels were higher in the IS group compared to the FCM group (p = 0.011 and p <0.001, respectively). The ferritin levels were significantly higher in the FCM group compared to the IS group (p = 0.002).

Conclusion: It is important to be aware that hypophosphatemia may occur after intravenous iron therapy for iron deficiency anemia. Therefore, phosphate levels should be monitored closely following treatment. Furthermore, it would appear that hypophosphatemia is more prevalent following FCM therapy compared to IS.