An Open-Label Study of JZP-458 (RC-P) in Patients With Acute Lymphoblastic Leukemia (ALL)/Lymphoblastic Lymphoma (LBL)

Inclusion Criteria: 1. Pediatric and adult patients with a diagnosis of ALL or LBL. 2. Have had an allergic reaction to a long-acting E. coli-derived asparaginase OR have silent inactivation. 3. Have 1 or more courses of E. coli-derived asparaginase remaining in his/her treatment plan. 4. Patients must have, in the opinion of the Investigator, fully recovered from their prior allergic reaction to E. coli-derived asparaginase. Exclusion Criteria: 1. Have previously received asparaginase Erwinia chrysanthemi or JZP-458. 2. Have relapsed ALL or LBL. 3. Are concurrently receiving another investigational agent and/or treated with an investigational device at the same time as JZP-458 (within 48 hours) during Course 1 of JZP-458. 4. Have a history of ≥ Grade 3 pancreatitis. 5. Prior history of asparaginase-associated ≥ Grade 3 hemorrhagic event or asparaginase-associated thrombus requiring anticoagulation therapy, excluding catheter-related thrombotic events.