Cytokine Release Syndrome (CRS): CRS, which may be life‐threatening or fatal, occurred in 15% of patients with R/R ALL and in 7% of patients with MRD-positive ALL. The median time to onset of CRS is 2 days after the start of infusion. Closely monitor and advise patients to contact their healthcare professional for signs and symptoms of serious adverse events such as fever, headache, nausea, asthenia, hypotension, increased alanine aminotransferase (ALT), increased aspartate aminotransferase (AST), increased total bilirubin (TBILI), and disseminated intravascular coagulation (DIC). The manifestations of CRS after treatment with BLINCYTO® overlap with those of infusion reactions, capillary leak syndrome, and hemophagocytic histiocytosis/macrophage activation syndrome. If severe CRS occurs, interrupt BLINCYTO® until CRS resolves. Discontinue BLINCYTO® permanently if life‐threatening CRS occurs.. BLINCYTO ® is indicated for the treatment of relapsed or refractory B-cell precursor acute lymphoblastic leukemia (ALL) in adults and children. Please see full Prescribing Information, including Boxed WARNINGS and Medication Guide, for BLINCYTO ®. BLINCYTO ® is a registered trademark of Amgen Inc.. BESPONSA is a prescription medicine used to treat adults with relapsed or refractory B-cell acute lymphoblastic leukemia (ALL). It is not known if BESPONSA is safe and effective in children under 18 years of age..