Tremelimumab

12.1 Mechanism of Action CTLA-4 is a negative regulator of T-cell activity. Tremelimumab-actl is a monoclonal antibody that binds to CTLA-4 and blocks the interaction with its ligands CD80 and CD86, releasing CTLA-4-mediated inhibition of T-cell activation. In synergistic mouse tumor models, blocking CTLA-4 activity resulted in decreased tumor growth and increased proliferation of T cells in tumors.

1 INDICATIONS AND USAGE IMJUDO is a cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) blocking antibody indicated: • in combination with durvalumab, for the treatment of adult patients with unresectable hepatocellular carcinoma (uHCC). ( 1.1 ) • in combination with durvalumab and platinum-based chemotherapy for the treatment of adult patients with metastatic non-small cell lung cancer (NSCLC) with no sensitizing epidermal growth factor receptor (EGFR) mutation or anaplastic lymphoma kinase (ALK) genomic tumor aberrations. ( 1.2 ) 1.1 Hepatocellular Carcinoma IMJUDO, in combination with durvalumab, is indicated for the treatment of adult patients with unresectable hepatocellular carcinoma (uHCC). 1.2 Non-Small Cell Lung Cancer (NSCLC) IMJUDO, in combination with durvalumab and platinum-based chemotherapy, is indicated for the treatment of adult patients with metastatic NSCLC with no sensitizing epidermal growth factor receptor (EGFR) mutations or anaplastic lymphoma kinase (ALK) genomic tumor aberrations.

2 DOSAGE AND ADMINISTRATION • Administer IMJUDO as an intravenous infusion over 60 minutes after dilution. ( 2.3 ) • uHCC: Weight 30 kg and more: IMJUDO 300 mg as a single dose in combination with durvalumab 1,500 mg at Cycle 1/Day 1, followed by durvalumab as a single agent every 4 weeks ( 2.1 ) Weight less than 30 kg: IMJUDO 4 mg/kg as a single dose in combination with durvalumab 20 mg/kg at Cycle 1/Day 1, followed by durvalumab as a single agent every 4 weeks ( 2.1 ) • Metastatic NSCLC: Weight 30 kg and more: 75 mg every 3 weeks in combination with durvalumab 1,500 mg and platinum-based chemotherapy for 4 cycles, and then administer durvalumab 1,500 mg every 4 weeks as a single agent with histology-based pemetrexed therapy every 4 weeks, and a fifth dose of IMJUDO 75 mg in combination with durvalumab dose 6 at week 16 ( 2.1 ) Weight less than 30 kg: 1 mg/kg every 3 weeks in combination with durvalumab 20 mg/kg and platinum-based chemotherapy for 4 cycles, and then administer durvalumab 20 mg/kg every 4 weeks as a single agent with histology-based pemetrexed therapy every 4 weeks, and a fifth dose of IMJUDO 1 mg/kg in combination with durvalumab dose 6 at week 16 ( 2.1 ) • See full Prescribing Information for preparation and administration instructions and dosage modifications for adverse reactions. 2.1 Recommended Dosage The recommended dosages of IMJUDO are presented in Tables 1, 2 and 3. Administer IMJUDO as an intravenous infusion after dilution as recommended [see Dosage and Administration (2.3) ]. IMJUDO in Combination with Durvalumab Table 1. Recommended dosage of IMJUDO Indication Recommended IMJUDO Dosage Duration of Therapy uHCC Patients with a body weight of 30 kg and more : • A single dose of IMJUDO Administer IMJUDO prior to durvalumab on the same day. 300 mg followed by durvalumab Refer to the Prescribing Information for durvalumab dosing information. 1,500 mg at Day 1 of Cycle 1; • Continue durvalumab 1,500 mg as a single agent every 4 weeks Patients with a body weight of less than 30 kg: • A single dose of IMJUDO 4 mg/kg followed by durvalumab 20 mg/kg at Day 1 of Cycle 1; • Continue durvalumab 20 mg/kg as a single agent every 4 weeks After Cycle 1 of combination therapy, administer durvalumab as a single agent every 4 weeks until disease progression or unacceptable toxicity IMJUDO in Combination with Durvalumab and Platinum-Based Chemotherapy The recommended dosage schedule and regimens for IMJUDO for the treatment of metastatic non-small cell lung cancer (NSCLC) are provided in Tables 2 and 3. Weigh patients prior to each infusion. Calculate the appropriate dose using Table 3 below based on the patient’s weight and tumor histology. Table 2: Recommended Dosage Schedule Week continue durvalumab until disease progression or intolerable toxicity. , dosing interval change from every 3 weeks to every 4 weeks starting at cycle 5. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Cycle: 1 2 3 4 5 6 7 8 IMJUDO intravenous infusion over 60 minutes [see Dosage and Administration (2.3) ]. , if patients receive fewer than 4 cycles of platinum-based chemotherapy, the remaining cycles of IMJUDO (up to a total of 5) should be given after the platinum-based chemotherapy phase, in combination with durvalumab, every 4 weeks. X X X X X Durvalumab , X X X X X X X X Chemotherapy X X X X X optional pemetrexed therapy from week 12 until disease progression or intolerable toxicity for patients with non-squamous disease who received treatment with pemetrexed and carboplatin/cisplatin. X X X Table 3: Recommended Regimen and Dosage Tumor Histology Patient Weight IMJUDO Dosage Durvalumab Refer to the Prescribing Information for dosing information. Dosage Platinum-based Chemotherapy Regimen Non-Squamous ≥ 30 kg 75 mg 1,500 mg • carboplatin & nab-paclitaxel OR • carboplatin or cisplatin & pemetrexed < 30 kg 1 mg/kg 20 mg/kg Squamous ≥ 30 kg 75 mg 1,500 mg • carboplatin & nab-paclitaxel OR • carboplatin or cisplatin & gemcitabine < 30 kg 1 mg/kg 20 mg/kg 2.2 Dosage Modifications for Adverse Reactions No dose reduction for treatment is recommended. In general, withhold treatment regimen for severe (Grade 3) immune-mediated adverse reactions. Permanently discontinue treatment regimen for life-threatening (Grade 4) immune-mediated adverse reactions, recurrent severe (Grade 3) immune-mediated reactions that require systemic immunosuppressive treatment, or an inability to reduce corticosteroid dose to 10 mg or less of prednisone or equivalent per day within 12 weeks of initiating corticosteroids. Recommended treatment modifications are presented in Table 4. Table 4. Recommended Dosage Modifications for Adverse Reactions Adverse Reaction Severity Based on National Cancer Institute Common Terminology Criteria for Adverse Events, version 4.03. Dosage Modification Immune-Mediated Adverse Reactions [see Warnings and Precautions (5.1) ] Pneumonitis Grade 2 Withhold Resume in patients with complete or partial resolu

6 ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the labeling. • Immune-Mediated Adverse Reactions [see Warnings and Precautions (5.1) ] . • Infusion-Related Reactions [see Warnings and Precautions (5.2) ]. Most common adverse reactions (≥ 20%) of patients with uHCC are rash, diarrhea, fatigue, pruritus, musculoskeletal pain, and abdominal pain. Most common laboratory abnormalities (≥ 40%) of patients with uHCC are AST increased, ALT increased, hemoglobin decreased, sodium decreased, bilirubin increased, alkaline phosphatase increased, and lymphocytes decreased. ( 6.1 ) Most common adverse reactions (≥ 20%) of patients with metastatic NSCLC were nausea, fatigue, musculoskeletal pain, decreased appetite, rash, and diarrhea. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact AstraZeneca at 1-800-236-9933 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 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. The data described in the Warnings and Precautions reflect exposure to IMJUDO 300 mg in combination with durvalumab 1,500 mg in 388 patients in HIMALAYA. In the HIMALAYA study patients received IMJUDO 300 mg administered as a single intravenous infusion in combination with durvalumab 1,500 mg on the same day, followed by durvalumab every 4 weeks. The data also reflects exposure to IMJUDO 75 mg in combination with durvalumab 1,500 mg and histology-based platinum chemotherapy regimens in the pooled safety population (N=596) of 330 patients in POSEIDON [see Clinical Studies (14.1) ] , and 266 patients in CASPIAN who received up to four cycles of platinum-etoposide plus durvalumab 1,500 mg with tremelimumab-actl 75 mg every 3 weeks, followed by durvalumab 1,500 mg every 4 weeks (an unapproved regimen for extensive-stage small cell lung cancer). Of these patients, 64% received the maximum of 5 doses of IMJUDO and 79% received at least 4 doses. In this pooled safety population, the most common (> 20%) adverse reactions were nausea (37%), decreased appetite (25%), and fatigue (22%). In this pooled safety population, the most common Grade 3 or 4 (> 10%) laboratory abnormalities were neutropenia (39%), leukopenia (21%), lymphocytopenia (20%), anemia (20%), hyponatremia (14%), lipase increased (12%), and thrombocytopenia (11%). The data described in this section reflect exposure to IMJUDO in patients with uHCC included in the HIMALAYA study and in patients with metastatic NSCLC enrolled in the POSEIDON study. Hepatocellular Carcinoma Unresectable HCC - HIMALAYA The safety of IMJUDO administered in combination with durvalumab was evaluated in a total of 388 patients with uHCC in HIMALAYA, a randomized, open-label, multicenter study [see Clinical Studies (14.1) ] . Patients received IMJUDO 300 mg administered as a single intravenous infusion in combination with durvalumab 1,500 mg on the same day, followed by durvalumab every 4 weeks or sorafenib 400 mg given orally twice daily. Serious adverse reactions occurred in 41% of patients who received IMJUDO in combination with durvalumab. Serious adverse reactions in > 1% of patients included hemorrhage (6%), diarrhea (4%), sepsis (2.1%), pneumonia (2.1%), rash (1.5%), vomiting (1.3%), acute kidney injury (1.3%), and anemia (1.3%). Fatal adverse reactions occurred in 8% of patients who received IMJUDO in combination with durvalumab, including death (1%), hemorrhage intracranial (0.5%), cardiac arrest (0.5%), pneumonitis (0.5%), hepatic failure (0.5%), and immune-mediated hepatitis (0.5%). The most common adverse reactions (occurring in ≥ 20% of patients) were rash, diarrhea, fatigue, pruritus, musculoskeletal pain, and abdominal pain. Permanent discontinuation of the treatment regimen due to an adverse reaction occurred in 14% of patients; the most common adverse reactions leading to treatment discontinuation (≥ 1%) were hemorrhage (1.8%), diarrhea (1.5%), AST increased (1%), and hepatitis (1%). Dosage interruptions or delay of the treatment regimen due to an adverse reaction occurred in 35% of patients. Adverse reactions which required dosage interruption or delay in ≥ 1% of patients included ALT increased (3.6%), diarrhea (3.6%), rash (3.6%), amylase increased (3.4%), AST increased (3.1%), lipase increased (2.8%), pneumonia (1.5%), hepatitis (1.5%), pyrexia (1.5%), anemia (1.3%), thrombocytopenia (1%), hyperthyroidism (1%), pneumonitis (1%), and blood creatinine increased (1%). Table 5 summarizes the adverse reactions that occurred in patients treated with IMJUDO in combination with durvalumab in the HIMALAYA study. Table 5. Adverse Reactions Occurring in ≥ 10% Patients in the HIMALAYA study IMJUDO and Durvalumab (N=388) Sorafenib (N=374) Adverse Reaction All Grades (%) Grade 3-4 (