- Induction: Patients receive oral tretinoin (ATRA) twice daily beginning on day 1 and continuing for 30-90 days and idarubicin (IDA) IV over 15 minutes on days 2, 4, and 8. ATRA is discontinued before day 90 in the presence of complete remission (CR) at day 30 or 60, unacceptable toxicity, or disease progression or in the absence of at least a partial remission at day 60. Patients who achieve CR during induction proceed to consolidation.