Inclusion Criteria:

- Adult patients, >/= 18 years of age

- Patients with histologically or cytologically documented acute myelogenous leukemia
appropriate for cytarabine therapy including:

- Arm A: Patients who have not received prior standard induction chemotherapy,
considered unsuitable for standard induction therapy

- Arm B: Patients who have failed their 1st or greater line of standard induction
chemotherapy (primary refractory) or patients who originally achieved a complete
response but are currently in first or greater relapse

- Eastern Cooperative Oncology Group (ECOG) performance status 0 to 2

- All non-hematological adverse events of any prior chemotherapy, surgery, or
radiotherapy must have resolved to NCI-CTC AE Grade
- Adequate hepatic and renal function

- Patient must be willing to submit the blood sampling and bone marrow sampling for PK
and PD analyses and exploratory biomarkers

Exclusion Criteria:

- History of allergic or toxic reactions attributed to cytarabine or a history of
allergic reactions to components of the formulated product

- Current evidence of CNS leukemia

- Any severe and/or uncontrolled medical condition or other conditions that could
affect the participation in the study

- Pregnant or breastfeeding women

- HIV-positive patients receiving combination anti-retroviral therapy