- At 3-4 weeks following the second consolidation course, patients receive a third course of consolidation therapy consisting of cytarabine IV bolus on day 1 followed by continuous infusion cytarabine on days 1-4 with etoposide IV over 1 hour on days 1-3 and methotrexate intrathecally on days 2 and 4. Patients receive GM-CSF subcutaneously beginning on day 6 and continuing until blood counts recover.