FDA Approves Treatment for Relapsed or Refractory Acute Myeloid Leukemia

 FDA Approves Treatment for Relapsed or Refractory Acute Myeloid Leukemia

Rigel Pharmaceuticals announced that the U.S. Food and Drug Administration (FDA) has approved REZLIDHIA™ (olutasidenib) capsules for the treatment of adult patients with relapsed or refractory (R/R) acute myeloid leukemia (AML) with a susceptible isocitrate dehydrogenase-1 (IDH1) mutation as detected by an FDA-approved test. REZLIDHIA is an oral, small molecule, inhibitor of mutated IDH1 designed to bind to and inhibit mIDH1 to reduce 2-hydroxyglutarate levels and restore normal cellular differentiation of myeloid cells.

The FDA approval was supported by data from the open-label Phase 2 registrational study evaluating REZLIDHIA monotherapy at a dose of 150 mg twice daily in 153 mIDH1 R/R AML patients. The efficacy-evaluable population was 147 patients who initiated REZLIDHIA at least six months prior to the interim analysis cutoff date of June 18, 2021, and who had a centrally confirmed IDH1 mutation. The primary endpoint was a composite of a complete remission (CR) plus a complete remission with partial hematological recovery (CRh). CRh is defined as less than 5% blasts in the bone marrow, no evidence of disease, and partial recovery of peripheral blood counts (platelets >50,000/microliter and absolute neutrophil count >500/microliter).


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