- At 6-8 weeks following the first course of consolidation therapy, patients receive a second consolidation course consisting of cytarabine IV bolus on day 1 followed by continuous infusion cytarabine on days 1-4 with methotrexate IV on days 1-4 and methotrexate intrathecally on days 2 and 4. Patients receive GM-CSF subcutaneously beginning on day 6 and continuing until blood counts recover.