Calaspargase pegol

12.1 Mechanism of Action L-asparaginase is an enzyme that catalyzes the conversion of the amino acid L-asparagine into aspartic acid and ammonia. The pharmacological effect of ASPARLAS is thought to be based on the killing of leukemic cells due to depletion of plasma asparagine. Leukemic cells with low expression of asparagine synthetase have a reduced ability to synthesize asparagine, and therefore depend on an exogenous source of asparagine for survival.

1 INDICATIONS AND USAGE ASPARLAS is an asparagine specific enzyme indicated as a component of a multi-agent chemotherapeutic regimen for the treatment of acute lymphoblastic leukemia in pediatric and young adult patients age 1 month to 21 years. ( 1.1 ) 1.1 Acute Lymphoblastic Leukemia ASPARLAS is indicated as a component of a multi-agent chemotherapeutic regimen for the treatment of acute lymphoblastic leukemia in pediatric and young adult patients age 1 month to 21 years.

2 DOSAGE AND ADMINISTRATION Recommended Dosage: 2,500 units/m 2 intravenously no more frequently than every 21 days. ( 2.1 ) See Full Prescribing Information for important details regarding dosing modifications and preparation and administration. ( 2.2 , 2.3 , 2.4 ) 2.1 Recommended Dosage The recommended dose of ASPARLAS is 2,500 units/m 2 given intravenously no more frequently than every 21 days. 2.2 Recommended Premedication Premedicate patients with acetaminophen, an H-1 receptor blocker (such as diphenhydramine), and an H-2 receptor blocker (such as famotidine) 30-60 minutes prior to administration of ASPARLAS to decrease the risk and severity of both infusion and hypersensitivity reactions [see Warnings and Precautions (5.1) ] . 2.3 Recommended Monitoring and Dosage Modifications for Adverse Reactions Monitor patients at least weekly with bilirubin, transaminases, glucose, and clinical examinations until recovery from the cycle of therapy. If an adverse reaction should occur, modify treatment according to Table 1. Table 1: Dosage Modifications Adverse Reaction Severity Grade 1 is mild, grade 2 is moderate, grade 3 is severe, and grade 4 is life-threatening. Action Infusion Reaction/ Hypersensitivity Reaction [see Warnings and Precautions (5.1) ] Grade 1 Reduce the infusion rate by 50% Grade 2 Interrupt the infusion of ASPARLAS Treat the symptoms When symptoms resolve, resume the infusion and reduce the infusion rate by 50% Grade 3 to 4 Discontinue ASPARLAS permanently Pancreatitis [see Warnings and Precautions (5.2) ] Grades 3 to 4 Hold ASPARLAS for elevations in lipase or amylase >3 × upper limit of normal (ULN) until enzyme levels stabilize or are declining Discontinue ASPARLAS permanently if clinical pancreatitis is confirmed Thrombosis [see Warnings and Precautions (5.3) ] Uncomplicated deep vein thrombosis Hold ASPARLAS Treat with appropriate antithrombotic therapy Upon resolution of symptoms consider resuming ASPARLAS, while continuing antithrombotic therapy Severe or life-threatening thrombosis Discontinue ASPARLAS permanently Treat with appropriate antithrombotic therapy Hemorrhage [see Warnings and Precautions (5.4) ] Grade 3 to 4 Hold ASPARLAS Evaluate for coagulopathy and consider clotting factor replacement as needed Resume ASPARLAS with the next scheduled dose if bleeding is controlled Hepatotoxicity [see Warnings and Precautions (5.5) ] Total bilirubin more than 3 times to no more than 10 times the ULN Hold ASPARLAS until total bilirubin is ≤1.5 times the ULN Total bilirubin more than 10 times the ULN Discontinue ASPARLAS and do not make up for missed doses 2.4 Preparation and Administration ASPARLAS is a clear and colorless solution. Visually inspect parenteral drug products for particulate matter, cloudiness, or discoloration prior to administration. If any of these are present, discard the vial. Do not administer if ASPARLAS has been shaken or vigorously agitated, frozen, or stored at room temperature for more than 48 hours. Dilute ASPARLAS in 100 mL of 0.9% Sodium Chloride Injection, USP or 5% Dextrose Injection, USP using sterile/aseptic technique. Discard any unused portion left in a vial. After dilution, administer immediately into a running infusion of either 0.9% sodium chloride or 5% dextrose, respectively. Administer the dose over a period of 1 hour. Do not infuse other drugs through the same intravenous line during administration of ASPARLAS. The diluted solution may be stored for up to 4 hours at room temperature (15°C to 25°C [59°F to 77°F]) or refrigerated at 2°C to 8°C (36°F to 46°F) for up to 24 hours. Protect from light. Do not shake or freeze.

6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in the labeling: Hypersensitivity [see Warnings and Precautions (5.1) ] Pancreatitis [see Warnings and Precautions (5.2) ] Thrombosis [see Warnings and Precautions (5.3) ] Hemorrhage [see Warnings and Precautions (5.4) ] Hepatotoxicity, including VOD [see Warnings and Precautions (5.5) ] The most common (incidence ≥10%) grade ≥3 adverse reactions were elevated transaminase, bilirubin increased, pancreatitis, and abnormal clotting studies. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Servier Pharmaceuticals LLC at 1-800-807-6124 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Study DFCI 11-001 The safety of ASPARLAS was investigated in Study DFCI 11-001, an open-label, randomized, active-controlled multicenter clinical trial that treated 237 children and adolescents with newly diagnosed ALL or lymphoblastic lymphoma, with ASPARLAS 2,500 U/m 2 (n=118) or pegaspargase 2,500 U/m 2 (n=119) as part of a Dana-Farber Cancer Institute (DFCI) ALL Consortium backbone therapy. The median age on enrollment was 5 years (range, 1-20 years). The majority of patients were male (62%) and white (70%). Most patients were considered standard risk (SR, 59%) and had B-cell lineage ALL (87%). The median number of doses during the study was 11 doses for ASPARLAS (administered every three weeks) and 16 doses for pegaspargase (administered every two weeks). The median duration of exposure was 8 months for both ASPARLAS and pegaspargase. There was 1 fatal adverse reaction (multi-organ failure in the setting of chronic pancreatitis associated with a pancreatic pseudocyst). Table 2 summarizes the incidence of selected grades ≥3 adverse reactions that occurred in 2 or more patients receiving ASPARLAS. Because not all grade 1 and 2 adverse reactions were collected prospectively, only grade 3 and 4 adverse events are presented in Table 2. Table 2: Selected Grades ≥3 Adverse Reactions in Patients Receiving ASPARLAS with Multi-Agent Chemotherapy (Study DFCI 11-001) ASPARLAS or pegaspargase were administered as a component of multi-agent chemotherapy regimens. Adverse Reaction Grouped terms: Elevated transaminase : Alanine aminotransferase increased, Aspartate aminotransferase increased, Transaminases increased; Bilirubin increased : Bilirubin conjugated increased, Blood bilirubin increased; Pancreatitis : Amylase increased, Lipase increased, Pancreatic necrosis, Pancreatitis, Pancreatitis relapsing; Abnormal clotting studies : Activated partial thromboplastin time prolonged, Blood fibrinogen decreased; Diarrhea : Colitis, Diarrhea, Enterocolitis, Neutropenic colitis; Hypersensitivity : Anaphylactic reaction, Drug hypersensitivity, Hypersensitivity; Embolic and thrombotic events SMQ : Device related thrombosis, Disseminated intravascular coagulation, Embolism, Intracardiac thrombus, Intracranial venous sinus thrombosis, Pulmonary embolism, Superior sagittal sinus thrombosis, Thrombosis in device, Venous thrombosis, Venous thrombosis limb; Sepsis : Bacterial sepsis, Sepsis; Dyspnea : Hypoxia, Respiratory failure; Hemorrhages SMQ (excludes laboratory terms): Disseminated intravascular coagulation, Epistaxis, Hematoma, Hemorrhage intracranial, Melena, Esophageal ulcer hemorrhage, Small intestinal hemorrhage, Upper gastrointestinal hemorrhage; Fungal infection : Fungal infection, Hepatic infection fungal, Respiratory tract infection fungal, Splenic infection fungal, Systemic candida; Pneumonia : Lung infection, Pneumonia, Pneumonitis; Arrhythmia : Atrioventricular block complete, Sinus tachycardia, Ventricular arrhythmia; Cardiac failure : Ejection fraction decreased, Left ventricular dysfunction. ASPARLAS 2,500 U/m 2 N=118 Pegaspargase 2,500 U/m 2 N=119 Grades ≥3 n (%) Grading is based on the Common Terminology Criteria for Adverse Events (CTCAE) v4.0. Grades ≥3 n (%) Elevated transaminase 61 (52) 79 (66) Bilirubin increased 24 (20) 30 (25) Pancreatitis 21 (18) 29 (24) Abnormal clotting studies 17 (14) 25 (21) Diarrhea 10 (9) 6 (5) Hypersensitivity 9 (8) 8 (7) Embolic and thrombotic events 9 (8) 10 (8) Sepsis 6 (5) 7 (6) Dyspnea 5 (4) 1 (1) Hemorrhages 5 (4) 5 (4) Fungal infection 4 (3) 3 (3) Pneumonia 4 (3) 8 (7) Arrhythmia 2 (2) 1 (1) Cardiac failure 2 (2) 1 (1) In the subgroup of patients with B-cell lineage ALL, the complete remission rate in the ASPARLAS arm was 98% (95/97), compared to 99% in the pegaspargase arm; the Kaplan-Meier estimates of overall survival of the treatment arms were comparable. Study AALL07P4 The safety of ASPARLAS was also evaluated in Study AALL07P4, an open-label, randomized, active-controlled, multicenter clinical tr