This study will evaluate the effect of CYP3A weak inducer rufinamide on the pharmacokinetics (PK) of Quizartinib in healthy subjects

This is a clinical pharmacology study with 2 treatment groups (Test treatment group receiving both rufinamide weak CYP3A inducer and quizartinib and Reference treatment group receiving quizartinib only) investigating the effect of rufinamide on the PK of quizartinib in healthy subjects.

Key Inclusion Criteria:

• Male and female subjects 18 to 55 years of age (inclusive), with a BMI of 18 kg/m2 to 32 kg/m2 (inclusive) at Screening.
• Has vital signs (measured after subject has been supine for at least 5 minutes) at Screening within the following ranges: heart rate: 50-100 beats per minute (bpm); systolic blood pressure (BP): 90-145 mmHg; diastolic BP: 50-95 mmHg. Out-of-range vital signs may be repeated once.
• Liver function test results (alanine aminotransferase [ALT], aspartate aminotransferase [AST], and total bilirubin [TBbil]) must be equal to or below the upper limit of normal (ULN). Hemoglobin levels must be ≥11.5 g/dL for female subjects and ≥12.5 g/dL for male subjects.
• In females, documented surgical sterilization (i.e., documented hysterectomy, bilateral tubal ligation, or bilateral salpingo-oophorectomy, Essure® with hysterosalpingogram [documentation to confirm tubal occlusion 12 weeks after procedure]), postmenopausal status for at least 1 year (follicle stimulating hormone [FSH] > 40 mIU/mL serum and estradiol <40 pg/mL [<147 pmol/L] at Screening), or agreement to have sterile male partner, or agreement to use 1 of the protocol-approved means of contraception from Screening until 7 months after the dose of quizartinib.
• In males, documented surgical sterilization, or sexual abstinence, or agreement to use 1 of the protocol-approved means of contraception from Screening until 4 months after the dose of quizartini

Key Exclusion Criteria:

• Any serious and/or unstable pre-existing medical, psychiatric disorder, or other conditions (including lab abnormality) that could interfere with subject's safety, obtaining informed consent, compliance to the study procedures, or the validity of the study results.
• History of a clinically significant illness, in the opinion of the Investigator, within 4 weeks prior to administration of quizartinib.
• History or presence of an abnormal ECG, which, in the investigator's opinion, is clinically significant and/or a QT interval corrected for heart rate using Fridericia's formula (QTcF) >450 milliseconds (ms) at Screening.
• Females who are pregnant or breastfeeding
• Laboratory results (serum chemistry, hematology, and urinalysis) outside the normal range, if considered clinically significant by the investigator. Estimated creatinine clearance (CrCl)<90 mL/min (calculated by using the Cockcroft-Gault Equation) at Screening.

No masking.