New Drug: Ziftomenib for Relapsed/Refractory NPM1-Mutated AML

Ziftomenib monotherapy led to a complete remission rate of 22% with a median overall survival of 6.6 months among relapsed/refractory NPM1-mutated AML patients. It was well tolerated with manageable differentiation syndrome and low rates of severe adverse events.

  • Study

    Phase II study [KOMET-001]
    Relapsed/refractory NPM1-mutated AML patients
    Ziftomenib 600 mg daily (n=92)



  • Efficacy

    CR/CRh: 22% [14-32]
    mOS: 6.6 mos [3.6-8.6]
    ORR: 33% [23-43]



  • Safety

    Grade >=3 AEs: Febrile neutropenia (26%), anemia (20%), thrombocytopenia (20%)
    Differentiation syndrome (25%)
    Discontinuations due to AEs: 3%


  • J Clin Oncol 2025;43:3381-3390

    Rodriguez-Arboli E, Wang ES, Montesinos P New Drug: Ziftomenib for Relapsed/Refractory NPM1-Mutated AML

    http://doi.org/10.1200/JCO-25-01694

    Reviewed by Ulas D. Bayraktar, MD on Nov 16, 2025

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