Long-Term Cost Reduction and Dose Optimization of Roxadustat in Hemodialysis Patients: A 100-Week Longitudinal Analysis

 

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Long-Term Cost Reduction and Dose Optimization of Roxadustat in Hemodialysis Patients: A 100-Week Longitudinal Analysis

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Kenji
Sawase
Kenji Sawase sawakenurouro@yahoo.co.jp Nagasaki Kidney Center Department of Blood Purification Nagasaki Japan *
Jyunichiro Hashiguchi hashiguchi1215@gmail.com Nagasaki Kidney Center Department of Blood Purification Nagasaki Japan -
Akihiro Maekawa a-maekawa@nagajin.jp Nagasaki Kidney Center Department of Blood Purification Nagasaki Japan -
Koutaro Shimoyama kaisyokai20@gmail.com Jikei University School of Medicine Department of Nephrology Tokyo Japan -
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Roxadustat, a hypoxia-inducible factor prolyl hydroxylase (HIF-PH) inhibitor, was first introduced in Japan in 2019 and subsequently adopted in several countries for anemia management in chronic kidney disease (CKD) and hemodialysis (HD) patients. Although initially more expensive than erythropoiesis-stimulating agents (ESAs), HIF-PH inhibitors represent a novel therapeutic class with broader metabolic effects through activation of multiple hypoxia-responsive genes. This study investigated the long-term cost trajectory and dose trends of roxadustat compared with conventional EPO therapy in HD patients.

Seventy-two stable maintenance HD patients previously treated with EPO (9,000 U/week) were switched to roxadustat at 100 mg, three times per week. The dose was titrated to maintain hemoglobin (Hb) levels between 10–12 g/dL. Ferrokinetic parameters were monitored, and iron supplementation was adjusted as needed. The cost per week was estimated using average retail prices in Japan. Longitudinal changes in dose, cost, and clinical indices—including GNRI and CRP—were analyzed over 100 weeks.

The initial weekly dose of roxadustat averaged 261 mg, corresponding to approximately 4,000 JPY/week—significantly higher than EPO (≈ 2,600 JPY/week). The dose gradually declined over the first 50 weeks, followed by an accelerated reduction beyond 60 weeks. After 100 weeks, the average dose and cost decreased to 65% of the initial level. GNRI slightly declined (92 ± 12.4 → 87 ± 8.9), and CRP rose modestly (0.3 ± 0.14 → 0.8 ± 0.14 mg/dL), neither reaching statistical significance. No severe adverse events were reported.

Long-term treatment with roxadustat demonstrated progressive dose and cost reductions comparable to EPO over a 100-week period. These findings suggest sustained hematopoietic efficacy with potential cost-saving benefits in HD patients. Further studies are warranted to elucidate the underlying mechanisms contributing to long-term dose optimization beyond nutritional or inflammatory influences.

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