FREEDOM2: This phase III trial is trying to determine whether a new self-administered therapy (Fedratinib) is safer and more effective than the current best available therapy in the myelofibrosis treatmentA Phase 3, Multicenter, Open-label, Randomized Study to Evaluate the Efficacy and Safety of Fedratinib Compared to Best Available Therapy (BAT) in Subjects With DIPSS (Dynamic International Prognostic Scoring System)-Intermediate or High-risk Primary Myelofibrosis (PMF), Post-polycythemia Vera Myelofibrosis (Post-PV MF), or Post-essential Thrombocythemia Myelofibrosis (Post-ET MF) and Previously Treated With Ruxolitinib

Exclusion

1. Any of the following laboratory abnormalities:

   1. Platelets < 50 x 109/L
   2. Absolute neutrophil count (ANC) < 1.0 x 109/L
   3. White blood count (WBC) > 100 x 109/L
   4. Myeloblasts ≥ 5 % in peripheral blood
   5. Estimated glomerular filtration rate < 30 mL/min/1.73 m2 (as per the Modification of Diet in Renal Disease [MDRD] formula)
   6. Serum amylase or lipase > 1.5 x upper limit of normal (ULN)
   7. Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) > 3 x upper limit of normal (ULN)
   8. Total bilirubin > 1.5 x ULN, subject's total bilirubin between 1.5 - 3.0 x ULN are eligible if the direct bilirubin fraction is < 25% of the total bilirubin
2. Subject is pregnant or lactating female
3. Subject with previous splenectomy
4. Subject with previous or planned hematopoietic cell transplant
5. Subject with prior history of encephalopathy, including Wernicke's (WE)
6. Subject with signs or symptoms of encephalopathy, including WE (eg, severe ataxia, ocular paralysis or cerebellar signs)
7. Subject with thiamine deficiency, defined as thiamine levels in whole blood below normal range according to the central laboratory and not demonstrated to be corrected prior to randomization
8. Subject with concomitant treatment with or use of pharmaceutical, herbal agents or food known to be strong or moderate inducers of Cytochrome P450 3A4 (CYP3A4), or dual CYP2C19 and CYP3A4 inhibitors
9. Subject on any chemotherapy, immunomodulatory drug therapy (eg, thalidomide, interferon-alpha), anagrelide, immunosuppressive therapy, systemic corticosteroids > 10 mg/day prednisone or equivalent. Subjects who have had prior exposure to hydroxyurea (eg, Hydrea) in the past may be enrolled into the study as long as it has not been administered within 14 days prior to randomization
10. Subject has received ruxolitinib within 14 days prior to randomization
11. Subject with previous exposure to Janus kinase (JAK) inhibitor(s) other than ruxolitinib treatment
12. Subject on treatment with aspirin with doses > 150 mg daily
13. Subject with major surgery within 28 days prior to randomization
14. Subject with diagnosis of chronic liver disease (eg, chronic alcoholic liver disease, autoimmune hepatitis, sclerosing cholangitis, primary biliary cirrhosis, hemochromatosis, non-alcoholic steatohepatitis)
15. Subject with prior malignancy other than the disease under study unless the subject has not required treatment for the malignancy for at least 3 years prior to randomization. However, subject with the following history/concurrent conditions provided successfully treated may enroll: non-invasive skin cancer, in situ cervical cancer, carcinoma in situ of the breast, incidental histologic finding of prostate cancer (T1a or T1b using the tumor, nodes, metastasis [TNM] clinical staging system), or is free of disease and on hormonal treatment only
16. Subject with uncontrolled congestive heart failure (New York Heart Association Classification 3 or 4)
17. Subject with known human immunodeficiency virus (HIV), known active infectious Hepatitis B (HepB), and/or known active infectious Hepatitis C (HepC)
18. Subject with serious active infection
19. Subject with presence of any significant gastric or other disorder that would inhibit absorption of oral medication
20. Subject is unable to swallow capsule
21. Subject with any significant medical condition, laboratory abnormality, or psychiatric illness that would prevent the subject from participating in the study
22. Subject has any condition including the presence of laboratory abnormalities, which places the subject at unacceptable risk if he/she were to participate in the study
23. Subject has any condition that confounds the ability to interpret data from the study
24. Subject with participation in any study of an investigational agent (drug, biologic, device) within 30 days prior to randomization
25. Subject with a life expectancy of less than 6 months