Boxed warning (cardiomyopathy, secondary malignancies, and extravasation and tissue necrosis •): Cardiomyopathy: IDAMYCIN PFS can cause myocardial damage, including acute left ventricular failure, during or after termination of therapy. The risk of cardiomyopathy is increased in patients who have received prior anthracyclines or who have pre-existing cardiac disease. • Myelosuppression: Severe myelosuppression resulting in severe infection, septic shock, hemorrhage, or death may occur. Obtain complete blood counts prior to each treatment and closely monitor patients during treatment for possible clinical complications due to myelosuppression. • Tumor Lysis Syndrome: During treatment, monitor blood chemistries and manage promptly. Treat as clinically indicated. • Hypersensitivity: Monitor patients for hypersensitivity reactions and manage as clinically indicated.