Confirmed diagnosis of PMF, post-PV MF, or post-ET MF, as assessed by the treating physician according to the World Health Organization (WHO) criteria
High, Intermediate-1, Intermediate-2 risk category International Prognosis System Score (IPSS)
Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2
JAK-inhibitor treatment naive
PMF, post-PV MF, or post-ET MF that is TP53WT as assessed by central testing
ECOG performance status of 0 to 2
Treatment with a stable dose of ruxolitinib
Suboptimal response to run-in ruxolitinib treatment
You may not be if
Prior Splenectomy
Splenic irradiation within 3 months prior to the first dose
Prior BCL-XL, BET, MDM2, PI3K, PIM, or XPO1 inhibitors therapy or p53-directed therapy
Eligible for Bone Marrow Transplant
Peripheral blood or bone marrow blast count ≥ 10 percent
Elevated white blood cell count that doubles (or more) during ruxolitinib treatment and exceeds 50 × 10\^9/L
Peripheral blood or bone marrow blast count ≥ 10 percent
Clareo Health | Study of Navtemadlin add-on to Ruxolitinib in JAK Inhibitor-Naïve Patients With Myelofibrosis Who Have a Suboptimal Response to Ruxolitinib
