Abstract
Background:Iron deficiency anemia (IDA) is the most common nutritional anemia globally. Goal of iron replacement therapy are correction of anemia and repletion of body iron stores. Oral iron replacement is the preferred route in general. However, response to oral iron replacement therapy is often suboptimal due to poor compliance to treatment resulting from gastrointestinal intolerance and prolonged duration of oral iron therapy. Ferric carboxymaltose is a relatively recently approved parenteral iron formulation which can be administered in large doses of upto 1000 mg in a single infusion.Aims:The present study describes the efficacy & safety of intravenous ferric carboxymaltose for treatment of iron deficiency anemia in a tertiary institution in India.Methods:This non‐randomised prospective study included 77 patients of age ≥ 12 years with confirmed diagnosis of iron deficiency anemia between January 2018 & January 2019. Detailed history was taken & examination performed for signs & etiology of IDA. The cut‐off serum ferritin level for IDA diagnosis was < 15 ng/ml. Pregnant females and patients with concurrent vitamin B12 deficiency were excluded. All patients were treated with Injection Ferric Carboxymaltose (FCM) by I.V. infusion over 30 minutes in day care. Total dose of parenteral iron was calculated according to Ganzoni Formula: Total iron deficit (mg) = 2.4 x body weight (kg) x [target haemoglobin – actual haemoglobin (g/dl)] + 500 mg (depot iron). The maximum dose of FCM administered in a single infusion was 1000 mg. Patients with total iron dose > 1000 mg received two divided doses one week apart. Patients also received oral folic acid at 5 mg/day dose for at least 3 weeks. Appropriate workup for etiology of IDA was performed in all patients. Therapeutic response was assessed after 3 weeks of first FCM dose & was defined as hemoglobin increase of ≥ 2 g/dl from baseline.Results:The median age of patients was 33 years (range 16 ‐ 75 years) and majority (78%) were females. The median baseline hemoglobin was 5 g/dl (range 2.0 ‐ 8.6 g/dl). Therapeutic response was achieved in 100% patients. Mean increase in haemoglobin at 3 weeks was 4.2 g/dl (range 2.8 ‐ 5.5 g/dl). One patient had mild headache during FCM infusion. There was no infusion‐related toxicity or any other adverse event.Summary/Conclusion:In our study, intravenous ferric carboxymaltose was found to be highly effective & safe alternative to oral iron for treatment of iron deficiency anemia, with excellent patient compliance. It is ideally suited for patients who require rapid replenishment of iron stores.
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