Besponsa Drug Information

1. INDICATIONS AND USAGE BESPONSA is indicated for the treatment of relapsed or refractory CD22-positive B-cell precursor acute lymphoblastic leukemia (ALL) in adult and pediatric patients 1 year and older. BESPONSA is a CD22-directed antibody and cytotoxic drug conjugate indicated for the treatment of relapsed or refractory CD22-positive B-cell precursor acute lymphoblastic leukemia (ALL) in adult and pediatric patients 1 year and older.

• 6. ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the label:
• Hepatotoxicity, including hepatic VOD (also known as SOS) [see Warnings and Precautions (5.1) ]
• Increased risk of post-transplant non-relapse mortality [see Warnings and Precautions (5.2) ]
• Myelosuppression [see Warnings and Precautions (5.3) ]
• Infusion related reactions [see Warnings and Precautions (5.4) ]
• QT interval prolongation [see Warnings and Precautions (5.5) ] The most common (≥ 20%) adverse reactions, including laboratory abnormalities, in adult and pediatric patients are thrombocytopenia, pyrexia, neutropenia, infection, anemia, vomiting, leukopenia, hemorrhage, fatigue, nausea, febrile neutropenia, headache, transaminases increased, abdominal pain, and gamma-glutamyltransferase increased, and hyperbilirubinemia. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Pfizer Inc at 1-800-438-1985 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. Relapsed or Refractory B-cell Precursor ALL Adult Patients The safety of BESPONSA was evaluated in adult patients with relapsed or refractory B-cell precursor ALL in the INO-VATE ALL trial. The study was a randomized clinical study of BESPONSA (n=164) versus Investigator’s choice of chemotherapy (fludarabine + cytarabine + granulocyte colony-stimulating factor [FLAG], mitoxantrone + cytarabine [MXN/Ara-C], or high dose cytarabine [HIDAC]) (n=143) [see Clinical Studies (14) ] . Of the 164 patients who received BESPONSA, the median age was 47 years (range: 18–78 years), 56% were male, 68% had received 1 prior treatment regimen for ALL, 31% had received 2 prior treatment regimens for ALL, 68% were White, 19% were Asian, and 2% were Black. In patients who received BESPONSA, the median duration of treatment was 8.9 weeks (range: 0.1–26.4 weeks), with a median of 3 treatment cycles started in each patient. In patients who received Investigator's choice of chemotherapy, the median duration of treatment was 0.9 weeks (range: 0.1–15.6 weeks), with a median of 1 treatment cycle started in each patient. In patients who received BESPONSA, the most common (≥ 20%) adverse reactions were thrombocytopenia, neutropenia, infection, anemia, leukopenia, fatigue, hemorrhage, pyrexia, nausea, headache, febrile neutropenia, transaminases increased, abdominal pain, gamma-glutamyltransferase increased, and hyperbilirubinemia. In patients who received BESPONSA, the most common (≥ 2%) serious adverse reactions were infection, febrile neutropenia, hemorrhage, abdominal pain, pyrexia, VOD, and fatigue. In patients who received BESPONSA, the most common (≥ 2%) adverse reactions reported as the reason for permanent discontinuation were infection (6%), thrombocytopenia (2%), hyperbilirubinemia (2%), transaminases increased (2%), and hemorrhage (2%); the most common (≥ 5%) adverse reactions reported as the reason for dosing interruption were neutropenia (17%), infection (10%), thrombocytopenia (10%), transaminases increased (6%), and febrile neutropenia (5%); and the most common (≥ 1%) adverse reactions reported as the reason for dose reduction were neutropenia (1%), thrombocytopenia (1%), and transaminases increased (1%). VOD was reported in 23/164 patients (14%) who received BESPONSA during or following treatment or following a HSCT after completion of treatment [see Warnings and Precautions (5.1) ]. Table 7 shows the adverse reactions with ≥ 10% incidence reported in patients with relapsed or refractory ALL who received BESPONSA or Investigator's choice of chemotherapy. Table 7. Adverse Reactions With ≥ 10% Incidence Only adverse reactions with ≥ 10% incidence in the BESPONSA arm are included. in Adult Patients With Relapsed or Refractory B-Cell Precursor ALL Who Received BESPONSA or Investigator's Choice of Chemotherapy (FLAG, MXN/Ara-C, or HIDAC) Body System Adverse Reaction BESPONSA (N=164) FLAG, MXN/Ara-C, or HIDAC (N=143 19 patients randomized to FLAG, MXN/Ara-C, or HIDAC did not receive treatment. ) All Grades ≥ Grade 3 All Grades ≥ Grade 3 % % % % Adverse reactions included treatment-emergent all-causality events that commenced on or after Cycle 1 Day 1 within 42 days after the final dose of BESPONSA, but prior to the start of a new anticancer treatment (including HSCT). Preferred terms were retrieved by applying the Medical Dictionary for Regulatory Activities (MedDRA) version 18.1. Severity grade of adverse reactions were according to NCI CTCAE version 3.0. Abbreviations: ALL=acute lymphoblastic leukemia; FLAG=fludarabine + cytarabine + granulocyte colony-stimulating factor; HIDAC=high dose cytarabine; HSCT=hematopoietic stem cell transplant; MXN/Ara-C=mitoxantrone + cytarabine; N=number of patients; NCI CTCAE=National Cancer Institute Common Toxicity Criteria for Adverse Events. Infections Infection Infection includes any reported preferred terms for BESPONSA retrieved in the System Organ Class Infections and infestations. 48 28 76 54 Blood and lymphatic system disorders Thrombocytopenia Thrombocytopenia includes the following reported preferred terms: Platelet count decreased and Thrombocytopenia. 51 42 61 59 Neutropenia Neutropenia includes the following reported preferred terms: Neutropenia and Neutrophil count decreased. 49 48 45 43 Anemia Anemia includes the following reported preferred terms: Anemia and Hemoglobin decreased. 36 24 59 47 Leukopenia Leukopenia includes the following reported preferred terms: Leukopenia, Monocytopenia, and White blood cell count decreased. 35 33 43 42 Febrile neutropenia 26 26 53 53 Lymphopenia Lymphopenia includes the following reported preferred terms: B-lymphocyte count decreased, Lymphocyte count decreased, and Lymphopenia. 18 16 27 26 Metabolism and nutrition disorders Decreased appetite 12 1 13 2 Nervous system disorders Headache Headache includes the following reported preferred terms: Headache, Migraine, and Sinus headache. 28 2 27 1 Vascular disorders Hemorrhage Hemorrhage includes reported preferred terms for BESPONSA retrieved in the Standard MedDRA Query (narrow) for Hemorrhage terms (excluding laboratory terms), resulting in the following preferred terms: Conjunctival hemorrhage, Contusion, Ecchymosis, Epistaxis, Eyelid bleeding, Gastrointestinal hemorrhage, Gastritis hemorrhagic, Gingival bleeding, Hematemesis, Hematochezia, Hematotympanum, Hematuria, Hemorrhage intracranial, Hemorrhage subcutaneous, Hemorrhoidal hemorrhage, Intra-abdominal hemorrhage, Lip hemorrhage, Lower gastrointestinal hemorrhage, Mesenteric hemorrhage, Metrorrhagia, Mouth hemorrhage, Muscle hemorrhage, Oral mucosa hematoma, Petechiae, Post-procedural hematoma, Rectal hemorrhage, Shock hemorrhagic, Subcutaneous hematoma, Subdural hematoma, Upper gastrointestinal hemorrhage, and Vaginal hemorrhage. 33 5 28 5 Gastrointestinal disorders Nausea 31 2 46 0 Abdominal pain Abdominal pain includes the following reported preferred terms: Abdominal pain, Abdominal pain lower, Abdominal pain upper, Abdominal tenderness, Esophageal pain, and Hepatic pain. 23 3 23 1 Diarrhea 17 1 38 1 Constipation 16 0 24 0 Vomiting 15 1 24 0 Stomatitis Stomatitis includes the following reported preferred terms: Aphthous ulcer, Mucosal inflammation, Mouth ulceration, Oral pain, Oropharyngeal pain, and Stomatitis. 13 2 26 3 Hepatobiliary disorders Hyperbilirubinemia 21 5 17 6 General disorders and administration site conditions Fatigue Fatigue includes the following reported preferred terms: Asthenia and Fatigue. 35 5 25 3 Pyrexia 32 3 42 6 Chills 11 0 11 0 Investigations Transaminases increased Transaminases increased includes the following reported preferred terms: Aspartate aminotransferase increased, Alanine aminotransferase increased, Hepatocellular injury, and Hypertransaminasemia. 26 7 13 5 Gamma-glutamyltransferase increased 21 10 8 4 Alkaline phosphatase increased 13 2 7 0 Additional adverse reactions (all grades) that were reported in less than 10% of patients treated with BESPONSA included: lipase increased (9%), abdominal distension (6%), amylase increased (5%), hyperuricemia (4%), ascites (4%), infusion related reaction (2%; includes the following: hypersensitivity and infusion related reaction), pancytopenia (2%; includes the following: bone marrow failure, febrile bone marrow aplasia, and pancytopenia), tumor lysis syndrome (2%), and electrocardiogram QT prolonged (1%). Table 8 shows the clinically important laboratory abnormalities reported in patients with relapsed or refractory ALL who received BESPONSA or Investigator's choice of chemotherapy. Table 8. Laboratory Abnormalities in Patients With Relapsed or Refractory B-Cell Precursor ALL Who Received BESPONSA or Investigator's Choice of Chemotherapy (FLAG, MXN/Ara-C, or HIDAC) BESPONSA FLAG, MXN/Ara-C, or HIDAC All Grades Grade 3/4 All Grades Grade 3/4 Laboratory Abnormality Laboratory abnormalities were summarized up to the end of treatment + 42 days but prior to the start of a new anti-cancer therapy. N % % N % % Severity grade of laboratory abnormalities according to NCI CTCAE version 3.0. Abbreviations: ALL=acute lymphoblastic leukemia; ALP=alkaline phosphatase; ALT=alanine aminotransferase; AST=aspartate aminotransferase; FLAG=fludarabine + cytarabine + granulocyte colony-stimulating factor; GGT=gamma-glutamyltransferase; HIDAC=high dose cytarabine; MXN/Ara-C=mitoxantrone + cytarabine; N=number of patients; NCI CTCAE=National Cancer Institute Common Toxicity Criteria for Adverse Events. Hematology Platelet count decreased 161 98 76 142 100 99 Hemoglobin decreased 161 94 40 142 100 70 Leukocytes decreased 161 95 82 142 99 98 Neutrophil count decreased 160 94 86 130 93 88 Lymphocytes (absolute) decreased 160 93 71 127 97 91 Chemistry GGT increased 148 67 18 111 68 17 AST increased 160 71 4 134 38 4 ALP increased 158 57 1 133 52 3 ALT increased 161 49 4 137 46 4 Blood bilirubin increased 161 36 5 138 35 6 Lipase increased 139 32 13 90 20 2 Hyperuricemia 158 16 3 122 11 0 Amylase increased 143 15 2 102 9 1 Pediatric Patients The safety of BESPONSA in pediatric patients 1 year and older with relapsed or refractory CD22-positive B-cell precursor ALL was evaluated in a multicenter, single-arm, open-label study (ITCC-059) [see Clinical Studies (14) ] . Patients (n=53) received the recommended dosage of BESPONSA [see Dosage and Administration (2.1) ] or BESPONSA at an initial dose of 1.4 mg/m 2 /cycle (approximately 0.78 times the recommended initial dosage). Patients received BESPONSA for a median of 2 (range: 1-4) cycles. The median age of patients who received BESPONSA was 9 years (range: 1-17), with 68% male. Serious adverse reactions occurred in 62% of patients who received BESPONSA. Serious adverse reactions in > 2% of patients included infection (21%), febrile neutropenia (17%), VOD (15%), hemorrhage (4%), pyrexia (6%) and multiorgan failure (2%). Fatal adverse reactions occurred in 8% of patients who received BESPONSA, including multiorgan failure, lung infection, sepsis, and encephalopathy. Permanent discontinuation of BESPONSA due to an adverse reaction occurred in 21% of patients. Adverse reactions which resulted in permanent discontinuation of BESPONSA in 2 or more patients included ALT increased and platelet count decreased. Dosage interruptions of BESPONSA due to an adverse reaction occurred in 11% of patients. Adverse reactions which required dosage interruption of BESPONSA in 6 patients included increased transaminases, febrile neutropenia, and headache. The most common adverse reactions (≥ 20%), including laboratory abnormalities, were thrombocytopenia, pyrexia, anemia, vomiting, infection, hemorrhage, neutropenia, nausea, leukopenia, febrile neutropenia, increased transaminases, abdominal pain, and headache. Table 9 summarizes the adverse reactions in ITCC-059. Table 9. Adverse Reactions (≥ 5%) in Pediatric Patients (N=53) With CD22-Positive Relapsed or Refractory ALL in Study WI203581 (ITCC-059) Severity grade of adverse reactions were according to NCI CTCAE version 4.03. Body System Adverse Reaction BESPONSA Monotherapy (N=53) All Grades ≥ Grade 3 % % General disorders and administration site conditions Pyrexia 49 4 Edema Includes other related terms. 19 0 Fatigue 17 0 Pain 15 2 Chills 8 0 Blood and lymphatic system disorders Anemia 45 38 Febrile neutropenia 28 28 Gastrointestinal disorders Vomiting 45 2 Nausea 32 0 Abdominal pain 25 2 Constipation 19 2 Stomatitis 17 6 Diarrhea 11 0 Infections and infestations Infection Infection includes any reported preferred terms for system organ class infections and infestations resulting in the following preferred terms: Acinetobacter bacteremia, bacteremia, candida infection, Cytomegalovirus infection, device related infection, device related sepsis, encephalitis, infectious enterocolitis, fungal infection, herpes virus infection, herpes zoster, influenza, kidney infection, mucosal infection, otitis media, paronychia, pneumonia, pneumonia fungal, respiratory tract infection, rhinitis, sepsis, sinusitis, skin infection, stoma site infection, upper respiratory tract infection, urinary tract inflammation, urinary tract infection, vaginal infection. 43 23 Vascular disorders Hemorrhage Hemorrhage includes any reported PT terms within the hemorrhage terms (excl laboratory terms) (SMQ) narrow, resulting in the following preferred terms: catheter site hemorrhage, diarrhea hemorrhagic, epistaxis, gingival bleeding, hematemesis, hematoma, hematuria, hemoptysis, hemorrhage intracranial, hemorrhoidal hemorrhage, lip hemorrhage, mouth hemorrhage, oral blood blister, petechiae, purpura, thrombotic thrombocytopenic purpura, and upper gastrointestinal hemorrhage. 42 6 Hypotension 6 4 Nervous system disorders Headache 21 0 Skin and subcutaneous tissue disorders Rash 19 4 Pruritis 9 0 Hyperhidrosis 6 0 Musculoskeletal and connective tissue disorders Pain in extremity 19 2 Back pain 6 0 Neck pain 6 0 Muscular weakness 6 0 Respiratory, thoracic and mediastinal disorders Cough 17 0 Dyspnea 8 2 Hypoxia 8 4 Hepatobiliary disorders Veno-occlusive disease 15 13 Hyperbilirubinemia 9 8 Metabolism and nutrition disorders Decreased appetite 11 4 Tumor lysis syndrome 11 11 Investigations Weight increased 8 2 Injury, poisoning and procedural complications Infusion related reaction Infusion related reaction includes the following preferred terms: infusion-related reaction and hypersensitivity. 8 0 Cardiac disorders Sinus tachycardia 6 2 Psychiatric disorders Anxiety 6 0 Table 10 summarizes select laboratory abnormalities in pediatric patients with CD22-positive relapsed/refractory ALL after receiving BESPONSA monotherapy in Study WI203581 (ITCC-059). Table 10. Select Laboratory Abnormalities in Pediatric Patients with CD22-positive Relapsed/Refractory ALL after receiving BESPONSA Monotherapy in Study WI203581 (ITCC-059) Severity grade of laboratory abnormalities according to NCI CTCAE version 4.03. Abbreviations: N= number of subjects with valid post-baseline assessment; NCI CTCAE=National Cancer Institute Common Toxicity Criteria for Adverse Events. Laboratory Abnormality BESPONSA Monotherapy All Grades Grade 3/4 N % % Hematology Platelet count decreased 53 100 85 Neutrophil count decreased 53 98 96 White blood cell decreased 53 98 89 Hemoglobin decreased 53 96 42 Lymphocyte count decreased 52 87 73 Chemistry AST increased 53 87 21 ALT increased 53 83 21 GGT increased 33 79 27 Blood bilirubin increased 53 30 9 ALP increased 53 28 0 Lipase increased 48 23 4 Serum amylase increased 49 14 0

7. DRUG INTERACTIONS Drugs That Prolong the QT Interval Concomitant use of BESPONSA with drugs known to prolong the QT interval or induce Torsades de Pointes may increase the risk of a clinically significant QTc interval prolongation . Discontinue or use alternative concomitant drugs that do not prolong QT/QTc interval while the patient is using BESPONSA. When it is not feasible to avoid concomitant use of drugs known to prolong QT/QTc, obtain ECGs and electrolytes prior to the start of treatment, after initiation of any drug known to prolong QTc, and periodically monitor as clinically indicated during treatment .

Pregnancy Risk Summary Based on its mechanism of action and findings from animal studies , BESPONSA can cause embryo-fetal harm when administered to a pregnant woman. There are no available data on BESPONSA use in pregnant women to inform a drug-associated risk. In rat embryo-fetal development studies, inotuzumab ozogamicin caused embryo-fetal toxicity at maternal systemic exposures that were ≥ 0.4 times the exposure in patients at the maximum recommended dose, based on AUC . Advise patients of the potential risk to a fetus.

In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies are 2–4% and 15–20%, respectively. Data Animal Data In embryo-fetal development studies in rats, pregnant animals received daily intravenous doses of inotuzumab ozogamicin up to 0.36 mg/m 2 during the period of organogenesis. Embryo-fetal toxicities including increased resorptions and fetal growth retardation as evidenced by decreased live fetal weights and delayed skeletal ossification were observed at ≥ 0.11 mg/m 2 (approximately 2 times the exposure in patients at the maximum recommended dose, based on AUC). Fetal growth retardation also occurred at 0.04 mg/m 2 (approximately 0.4 times the exposure in patients at the maximum recommended dose, based on AUC). In an embryo-fetal development study in rabbits, pregnant animals received daily intravenous doses up to 0.15 mg/m 2 (approximately 3 times the exposure in patients at the maximum recommended dose, based on AUC) during the period of organogenesis.

At a dose of 0.15 mg/m 2, slight maternal toxicity was observed in the absence of any effects on embryo‑fetal development.

Pediatric Use The safety and effectiveness of BESPONSA in pediatric patients 1 year and older with relapsed or refractory CD22-positive B-cell precursor ALL have been established. The use of BESPONSA for this indication is supported by evidence of safety and effectiveness in Study WI203581 (ITCC-059) . The study included patients in the following age groups: 2 patients 1 year to < 2 years old, 10 patients 2 years to < 6 years old, 20 patients 6 years to < 12 years old, and 20 patients 12 years to < 17 years old. Compared to adults, pediatric patients had a higher incidence of liver test abnormalities; with grade 3-4 increases in AST, ALT, and total bilirubin in 21%, 21%, and 9%, respectively, in pediatric patients treated with BESPONSA compared to 4%, 4%, and 5% in adults.

The safety and effectiveness of BESPONSA in patients < 1 year of age with relapsed or refractory CD22-positive B-cell precursor ALL have not been established.

4. CONTRAINDICATIONS None. None