FDA Wants More Study of FibroGen Roxadustat

An FDA complete response letter for the FibroGen NDA for roxadustat to treat anemia of chronic kidney disease says the agency will not approve the NDA in its present form and requests additional clinical study before resubmission. The company says it and its partner, AstraZeneca, will be discussing next steps with FDA.

Roxadustat is described as the first HIF-PH inhibitor, a new class of medicines that promotes erythropoiesis through increased endogenous production of erythropoietin, improved iron absorption and mobilization, and downregulation of hepcidin. It is also in clinical development for anemia associated with myelodysplastic syndromes and for chemotherapy-induced anemia.

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