OPDUALAG

6 ADVERSE REACTIONS The following clinically significant adverse reactions are discussed in greater detail in other sections of the labeling. • Severe and Fatal IMARs [see Warnings and Precautions (5.1) ] • Infusion-Related Reactions [see Warnings and Precautions (5.2) ] • Complications of Allogeneic HSCT [see Warnings and Precautions (5.3) ] The most common adverse reactions (≥20%) are musculoskeletal pain, fatigue, rash, pruritus, and diarrhea. (6.1) The most common laboratory abnormalities (≥20%) are decreased hemoglobin, decreased lymphocytes, increased AST, increased ALT, and decreased sodium. (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Bristol-Myers Squibb at 1-800-721-5072 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. The safety of OPDUALAG was evaluated in RELATIVITY-047, a randomized (1:1), double-blinded trial in 714 patients with previously untreated metastatic or unresectable melanoma [see Clinical Studies (14) ] . Patients received intravenous OPDUALAG (nivolumab 480 mg and relatlimab 160 mg) every 4 weeks (n=355) or nivolumab 480 mg by intravenous infusion every 4 weeks (n=359). Patients were treated with OPDUALAG or nivolumab until disease progression or unacceptable toxicity. The median duration of exposure was 6 months (range: 0 to 31 months) in OPDUALAG-treated patients and 5 months (range: 0 to 32 months) in nivolumab-treated patients. Serious adverse reactions occurred in 36% of patients treated with OPDUALAG. The most frequent serious adverse reactions reported in ≥1% of patients treated with OPDUALAG were adrenal insufficiency (1.4%), anemia (1.4%), colitis (1.4%), pneumonia (1.4%), acute myocardial infarction (1.1%), back pain (1.1%), diarrhea (1.1%), myocarditis (1.1%), and pneumonitis (1.1%). Fatal adverse reaction occurred in 3 (0.8%) patients who were treated with OPDUALAG; these included hemophagocytic lymphohistiocytosis, acute edema of the lung, and pneumonitis. OPDUALAG was permanently discontinued due to adverse reactions in 18% of patients. Adverse reactions which resulted in permanent discontinuation of OPDUALAG in ≥1% of patients included myocarditis (1.7%) and pneumonitis (1.4%). Dosage interruptions due to an adverse reaction occurred in 43% of patients who received OPDUALAG. Adverse reactions that required dosage interruption in ≥2% of patients who received OPDUALAG were diarrhea (3.9%), troponin increased (3.9%), AST increased (2.8%), troponin T increased (2.8%), ALT increased (2.3%), arthralgia (2.3%), hypothyroidism (2.3%), anemia (2%), fatigue (2%), pneumonitis (2%), and rash (2%). The most common (≥20%) adverse reactions that occurred in patients treated with OPDUALAG were musculoskeletal pain (45%), fatigue (39%), rash (28%), pruritus (25%), and diarrhea (24%). The most common (≥20%) laboratory abnormalities that occurred in patients treated with OPDUALAG were decreased hemoglobin (37%), decreased lymphocytes (32%), increased AST (30%), increased ALT (26%), and decreased sodium (24%). Tables 3 and 4 summarize both the adverse reactions and laboratory abnormalities, respectively, in RELATIVITY-047. Table 3: Adverse Reactions in ≥15% of Patients - RELATIVITY-047 Toxicity was graded per NCI CTCAE v5. a Includes multiple terms. Adverse Reaction OPDUALAG (n=355) Nivolumab (n=359) All Grades (%) Grades 3-4 (%) All Grades (%) Grades 3-4 (%) Musculoskeletal and Connective Tissue Musculoskeletal pain a 45 4.2 31 1.7 General Fatigue a 39 2 29 0.6 Skin and Subcutaneous Tissue Rash a 28 1.4 21 1.9 Pruritus 25 0 17 0.6 Gastrointestinal Diarrhea a 24 2 17 1.4 Nausea 17 0.6 14 0 Nervous System Headache a 18 0.3 12 0.3 Endocrine Hypothyroidism a 17 0 14 0 Metabolism and Nutrition Disorders Decreased appetite 15 0.6 7 0.3 Respiratory, Thoracic and Mediastinal Disorders Cough a 15 0.3 11 0 Clinically relevant adverse reactions in <15% of patients who received OPDUALAG included vitiligo, adrenal insufficiency, myocarditis, and hepatitis. Table 4: Laboratory Abnormalities (≥15%) That Worsened from Baseline a in Patients Who Received OPDUALAG in RELATIVITY-047 a Each test incidence is based on the number of patients who had both baseline and at least one on-study laboratory measurement available: OPDUALAG group (range: 280 to 342 patients) and nivolumab group (range: 276 to 345 patients). Laboratory Abnormality OPDUALAG a Nivolumab a Grades 1-4 (%) Grades 3-4 (%) Grades 1-4 (%) Grades 3-4 (%) Chemistry Increased AST 30 2.3 22 1.4 Increased ALT 26 3.2 25 2 Decreased sodium 24 1.2 21 0.6 Increased alkaline phosphatase 19 0.6 17 0.9 Increased creatinine 19 0 16 0 Hematology Decreased hemoglobin 37 2.7 31 3.5 Decreased lymphocytes 32 2.5 24 2.9

4 CONTRAINDICATIONS None. • None. (4)

11 DESCRIPTION Nivolumab and relatlimab-rmbw is a fixed-dose combination of two IgG4 kappa monoclonal antibodies (mAbs). Nivolumab is a programmed death receptor-1 (PD-1) blocking antibody that has a calculated molecular mass of 146 kDa and is expressed in a recombinant Chinese Hamster Ovary (CHO) cell line. Relatlimab is a lymphocyte activation gene-3 (LAG-3) blocking antibody that has a calculated molecular mass of 148 kDa and is expressed in a recombinant CHO cell line. OPDUALAG (nivolumab and relatlimab-rmbw) injection is a sterile, preservative-free, clear to opalescent, colorless to slightly yellow solution that may contain few translucent-to-white particles. OPDUALAG is supplied as 240 mg of nivolumab and 80 mg of relatlimab in a 20 mL single-dose vial for intravenous use. Each mL of OPDUALAG solution contains 12 mg of nivolumab, 4 mg of relatlimab, and histidine (1.1 mg), L-histidine hydrochloride monohydrate (2.7 mg), pentetic acid (0.008 mg), polysorbate 80 (0.5 mg), sucrose (85.6 mg), and Water for Injection, USP. The pH is 5.8.

2 DOSAGE AND ADMINISTRATION • Adult patients and pediatric patients 12 years of age or older who weigh at least 40 kg: 480 mg nivolumab and 160 mg relatlimab intravenously every 4 weeks. (2) • Administer OPDUALAG as an intravenous infusion over 30 minutes. (2) • See full Prescribing Information for dosage modifications for adverse reactions (2.2) and preparation and administration instructions for the injection (2.3) . 2.1 Recommended Dosage The recommended dosage of OPDUALAG for adult patients and pediatric patients 12 years of age or older who weigh at least 40 kg is 480 mg nivolumab and 160 mg relatlimab administered intravenously every 4 weeks until disease progression or unacceptable toxicity occurs. The recommended dosage for pediatric patients 12 years of age or older who weigh less than 40 kg has not been established [see Use in Specific Populations (8.4) ] . 2.2 Dosage Modifications No dose reduction for OPDUALAG is recommended. In general, withhold OPDUALAG for severe (Grade 3) immune-mediated adverse reactions (IMARs). Permanently discontinue OPDUALAG for life-threatening (Grade 4) IMARs, recurrent severe (Grade 3) IMARs 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 steroids. Dosage modifications for adverse reactions that require management different from these general guidelines are summarized in Table 1. Table 1: Recommended Dosage Modifications for Adverse Reactions * Based on National Cancer Institute Common Terminology Criteria for Adverse Events, Version 5.0. a Resume in patients with complete or partial resolution (Grade 0 to 1) after corticosteroid taper. Permanently discontinue if no complete or partial resolution within 12 weeks of last dose or inability to reduce prednisone to 10 mg per day (or equivalent) or less within 12 weeks of initiating steroids. b Depending on clinical severity, consider withholding for Grade 2 endocrinopathy until symptom improvement with hormone replacement. Resume once acute symptoms have resolved. ALT = alanine aminotransferase, AST = aspartate aminotransferase, DRESS = Drug Rash with Eosinophilia and Systemic Symptoms, SJS = Stevens Johnson Syndrome, TEN = toxic epidermal necrolysis, ULN = upper limit normal Adverse Reaction Severity* Dose Modification Immune-Mediated Adverse Reactions [see Warnings and Precautions (5.1) ] Pneumonitis Grade 2 Withhold a Grade 3 or 4 Permanently discontinue Colitis Grade 2 or 3 Withhold a Grade 4 Permanently discontinue Hepatitis AST/ALT increases to more than 3 and up to 8 times ULN or Total bilirubin increases to more than 1.5 and up to 3 times ULN. Withhold a AST or ALT increases to more than 8 times ULN regardless of baseline. or Total bilirubin increases to more than 3 times ULN. Permanently discontinue Endocrinopathies b Grade 3 or 4 Withhold until clinically stable or permanently discontinue depending on severity Nephritis with Renal Dysfunction Grade 2 or 3 increased blood creatinine Withhold a Grade 4 increased blood creatinine Permanently discontinue Exfoliative Dermatologic Conditions Suspected SJS, TEN, or DRESS Withhold Confirmed SJS, TEN, or DRESS Permanently discontinue Myocarditis Grade 2, 3, or 4 Permanently discontinue Neurological Toxicities Grade 2 Withhold a Grade 3 or 4 Permanently discontinue Other Adverse Reactions Infusion-Related Reactions [see Warnings and Precautions (5.2) ] Grade 1 or 2 Interrupt or slow the rate of infusion Grade 3 or 4 Permanently discontinue 2.3 Preparation and Administration OPDUALAG is a fixed-dose combination of nivolumab and relatlimab. Visually inspect the solution in the drug product vial for particulate matter and discoloration prior to administration. OPDUALAG is a clear to opalescent, colorless to slightly yellow solution. Discard the vial if the solution is cloudy, discolored, or contains extraneous particulate matter other than a few translucent-to-white particles. Preparation • During preparation of the infusion solution, use aseptic technique to assure sterility, as the product does not contain a preservative. • OPDUALAG can be administered diluted or undiluted and administered at a final concentration as specified in Table 2 below. • Withdraw the required volume of OPDUALAG and transfer into an intravenous container. OPDUALAG is compatible with di(2-ethylhexyl)phthalate (DEHP)-plasticized polyvinyl chloride (PVC), ethyl vinyl acetate (EVA), and polyolefin (PO) intravenous bags. • If diluting OPDUALAG prior to administration: - Dilute OPDUALAG solution with 0.9% Sodium Chloride Injection, USP or 5% Dextrose Injection, USP to prepare an infusion meeting the final concentration and maximum infusion volume parameters as specified in Table 2 below. - Then mix the diluted solution by gentle inversion. Do not shake. • Discard partially used vials or empty vials following infusion preparation. Table 2: Maximum Infusion Volumes and Concentration Ranges by Patient Group * The concentration range in each group includes 12 mg/mL nivolumab and 4 mg/mL relatlimab as the upper limit, which represents a scenario in which the drug product is infused without dilution. Patient Group Maximum Infusion Volume (mL or mL/kg) Concentration Range (mg/mL)* Adult patients who weigh at least 40 kg and pediatric patients 12 years of age or older who weigh at least 40 kg 160 mL Nivolumab: 3 mg/mL to 12 mg/mL Relatlimab: 1 mg/mL to 4 mg/mL Adult patients who weigh less than 40 kg 4 mL/kg Nivolumab: 3 mg/mL to 12 mg/mL Relatlimab: 1 mg/mL to 4 mg/mL Storage of Prepared Solution Store the prepared solution either: • at room temperature and room light for no more than 8 hours from the time of preparation to the end of the infusion. Discard the prepared solution if not used within 8 hours from the time of preparation; -or- under refrigeration at 2°C to 8°C (36°F to 46°F) with protection from light for no more than 24 hours from the time of preparation, which includes the time allowed for equilibration of the infusion bag to room temperature and the duration of the infusion. Discard the prepared solution if not used within 24 hours from the time of preparation. Do not freeze. Administration • Administer the infusion over 30 minutes through an intravenous line containing a sterile, non-pyrogenic, low protein binding in-line polyethersulfone (PES), nylon, or polyvinylidene fluoride (PVDF) filter (pore size of 0.2 micrometer to 1.2 micrometer). • Flush the intravenous line at the end of the infusion. • Do not coadminister other drugs through the same intravenous line.

1 INDICATIONS AND USAGE OPDUALAG™ is indicated for the treatment of adult and pediatric patients 12 years of age or older with unresectable or metastatic melanoma. OPDUALAG is a combination of nivolumab, a programmed death receptor-1 (PD-1) blocking antibody, and relatlimab, a lymphocyte activation gene-3 (LAG-3) blocking antibody, indicated for the treatment of adult and pediatric patients 12 years of age or older with unresectable or metastatic melanoma. (1)

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Relatlimab is a human IgG4 monoclonal antibody that binds to the LAG-3 receptor, blocks interaction with its ligands, including MHC II, and reduces LAG-3 pathway-mediated inhibition of the immune response. Antagonism of this pathway promotes T cell proliferation and cytokine secretion. Binding of the PD-1 ligands, PD-L1 and PD-L2, to the PD-1 receptor found on T cells, inhibits T-cell proliferation and cytokine production. Upregulation of PD-1 ligands occurs in some tumors, and signaling through this pathway can contribute to inhibition of active T-cell immune surveillance of tumors. Nivolumab is a human IgG4 monoclonal antibody that binds to the PD-1 receptor, blocks interaction with its ligands PD-L1 and PD-L2, and reduces PD-1 pathway-mediated inhibition of the immune response, including the anti-tumor immune response. In syngeneic mouse tumor models, blocking PD-1 activity resulted in decreased tumor growth. The combination of nivolumab (anti-PD-1) and relatlimab (anti-LAG-3) results in increased T-cell activation compared to the activity of either antibody alone. In murine syngeneic tumor models, LAG-3 blockade potentiates the anti-tumor activity of PD-1 blockage, inhibiting tumor growth and promoting tumor regression. 12.2 Pharmacodynamics The exposure-response relationship and time course of pharmacodynamic response for the safety and effectiveness of OPDUALAG have not been fully characterized. 12.3 Pharmacokinetics The pharmacokinetics (PK) of relatlimab following the administration of OPDUALAG were characterized in patients with cancer who received relatlimab 20 to 800 mg every 2 weeks (0.25 to 10 times the approved recommended dosage) or 160 to 1440 mg every 4 weeks (1 to 9 times the approved recommended dosage) either as a monotherapy or in combination with nivolumab dosages of 80 or 240 mg every 2 weeks or 480 mg every 4 weeks. Steady-state concentrations of relatlimab were reached by 16 weeks with an every 4-week regimen and the systemic accumulation was 1.9-fold. The average concentration (C avg ) of relatlimab after the first dose increased dose proportionally at doses ≥160 mg every 4 weeks. Following the recommended dosage, the geometric mean [coefficient of variation (CV%)] maximum and average concentrations (C max and C avg ) of relatlimab at steady state were 62.2 (30%), and 28.8 (45%) μg/mL, respectively; and the mean C max and C avg of nivolumab at steady state were 187 (33%) and 94.4 (43%) μg/mL, respectively. In RELATIVITY-047, the nivolumab geometric mean minimum concentration (C min ) at steady state in the OPDUALAG arm was comparable to the nivolumab arm. Distribution The geometric mean (CV%) volume of distribution at steady state of relatlimab is 6.6 L (20%) and 6.6 L (19%) of nivolumab. Elimination The geometric mean (CV%) clearance of relatlimab is 5.5 mL/h (41%) at steady state, 10% lower than after the first dose [6 mL/h (39%)]. Following OPDUALAG (nivolumab 480 mg and relatlimab 160 mg administered every 4 weeks) administration, the geometric mean (CV%) effective half-life (t 1/2 ) of relatlimab is 26.2 days (37%). The geometric mean (CV%) clearance of nivolumab is 7.6 mL/h (40%) at steady state, 21% lower than after the first dose [9.6 mL/h (40%)] and the terminal t 1/2 is 26.5 days (36%). Specific Populations The following factors had no clinically important effect on the clearance of nivolumab and relatlimab: age (17 to 92 years), sex, race (White, Asian, and Black/African American), mild or moderate renal impairment (eGFR 30 to 89 mL/min/1.73 m 2 ), mild hepatic impairment (total bilirubin [TB] less than or equal to upper limit of normal [ULN] and AST greater than ULN or TB greater than 1 to 1.5 times ULN and any AST) or moderate hepatic impairment (TB greater than 1.5 to 3 times ULN and any AST). The effects of severe renal impairment, or severe hepatic impairment on the pharmacokinetics of nivolumab and relatlimab are unknown. Pediatric patients: The exposures of nivolumab and relatlimab in pediatric patients 12 years of age or older who weigh at least 40 kg are expected to be in the range of exposures in adult patients at the recommended dosage. 12.6 Immunogenicity The observed incidence of anti-drug antibodies is highly dependent on the sensitivity and specificity of the assay. Differences in assay methods preclude meaningful comparisons of the incidence of anti-drug antibodies in the studies described below with the incidence of anti-drug antibodies in other studies, including studies of nivolumab and relatlimab-rmbw products, or nivolumab products. During the initial 24-month treatment period in RELATIVITY-047, the incidence of: • anti-nivolumab antibodies and neutralizing antibodies in the OPDUALAG group was 3.8% (11/288) and 0.3% (1/288), respectively, which was similar to that observed in the nivolumab group: 5.9% (16/272) and 0.4% (1/272), respectively. • anti-relatlimab antibodies and neutralizing antibodies in the OPDUALAG group was 5.6% (16/286) and 0.3% (1/286), respectively. Because of the low incidence of anti-drug antibodies, the effect of these antibodies on the pharmacokinetics, pharmacodynamics, safety, or effectiveness of OPDUALAG is unknown.

12.1 Mechanism of Action Relatlimab is a human IgG4 monoclonal antibody that binds to the LAG-3 receptor, blocks interaction with its ligands, including MHC II, and reduces LAG-3 pathway-mediated inhibition of the immune response. Antagonism of this pathway promotes T cell proliferation and cytokine secretion. Binding of the PD-1 ligands, PD-L1 and PD-L2, to the PD-1 receptor found on T cells, inhibits T-cell proliferation and cytokine production. Upregulation of PD-1 ligands occurs in some tumors, and signaling through this pathway can contribute to inhibition of active T-cell immune surveillance of tumors. Nivolumab is a human IgG4 monoclonal antibody that binds to the PD-1 receptor, blocks interaction with its ligands PD-L1 and PD-L2, and reduces PD-1 pathway-mediated inhibition of the immune response, including the anti-tumor immune response. In syngeneic mouse tumor models, blocking PD-1 activity resulted in decreased tumor growth. The combination of nivolumab (anti-PD-1) and relatlimab (anti-LAG-3) results in increased T-cell activation compared to the activity of either antibody alone. In murine syngeneic tumor models, LAG-3 blockade potentiates the anti-tumor activity of PD-1 blockage, inhibiting tumor growth and promoting tumor regression.

12.2 Pharmacodynamics The exposure-response relationship and time course of pharmacodynamic response for the safety and effectiveness of OPDUALAG have not been fully characterized.

12.3 Pharmacokinetics The pharmacokinetics (PK) of relatlimab following the administration of OPDUALAG were characterized in patients with cancer who received relatlimab 20 to 800 mg every 2 weeks (0.25 to 10 times the approved recommended dosage) or 160 to 1440 mg every 4 weeks (1 to 9 times the approved recommended dosage) either as a monotherapy or in combination with nivolumab dosages of 80 or 240 mg every 2 weeks or 480 mg every 4 weeks. Steady-state concentrations of relatlimab were reached by 16 weeks with an every 4-week regimen and the systemic accumulation was 1.9-fold. The average concentration (C avg ) of relatlimab after the first dose increased dose proportionally at doses ≥160 mg every 4 weeks. Following the recommended dosage, the geometric mean [coefficient of variation (CV%)] maximum and average concentrations (C max and C avg ) of relatlimab at steady state were 62.2 (30%), and 28.8 (45%) μg/mL, respectively; and the mean C max and C avg of nivolumab at steady state were 187 (33%) and 94.4 (43%) μg/mL, respectively. In RELATIVITY-047, the nivolumab geometric mean minimum concentration (C min ) at steady state in the OPDUALAG arm was comparable to the nivolumab arm. Distribution The geometric mean (CV%) volume of distribution at steady state of relatlimab is 6.6 L (20%) and 6.6 L (19%) of nivolumab. Elimination The geometric mean (CV%) clearance of relatlimab is 5.5 mL/h (41%) at steady state, 10% lower than after the first dose [6 mL/h (39%)]. Following OPDUALAG (nivolumab 480 mg and relatlimab 160 mg administered every 4 weeks) administration, the geometric mean (CV%) effective half-life (t 1/2 ) of relatlimab is 26.2 days (37%). The geometric mean (CV%) clearance of nivolumab is 7.6 mL/h (40%) at steady state, 21% lower than after the first dose [9.6 mL/h (40%)] and the terminal t 1/2 is 26.5 days (36%). Specific Populations The following factors had no clinically important effect on the clearance of nivolumab and relatlimab: age (17 to 92 years), sex, race (White, Asian, and Black/African American), mild or moderate renal impairment (eGFR 30 to 89 mL/min/1.73 m 2 ), mild hepatic impairment (total bilirubin [TB] less than or equal to upper limit of normal [ULN] and AST greater than ULN or TB greater than 1 to 1.5 times ULN and any AST) or moderate hepatic impairment (TB greater than 1.5 to 3 times ULN and any AST). The effects of severe renal impairment, or severe hepatic impairment on the pharmacokinetics of nivolumab and relatlimab are unknown. Pediatric patients: The exposures of nivolumab and relatlimab in pediatric patients 12 years of age or older who weigh at least 40 kg are expected to be in the range of exposures in adult patients at the recommended dosage.

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3 DOSAGE FORMS AND STRENGTHS Injection: 240 mg nivolumab and 80 mg relatlimab per 20 mL (12 mg and 4 mg per mL) as a clear to opalescent, colorless to slightly yellow solution in a single-dose vial. • Injection: 240 mg of nivolumab and 80 mg of relatlimab per 20 mL (12 mg and 4 mg per mL) in a single-dose vial. (3)

OPDUALAG nivolumab and relatlimab-rmbw NIVOLUMAB NIVOLUMAB RELATLIMAB RELATLIMAB HISTIDINE HISTIDINE MONOHYDROCHLORIDE MONOHYDRATE PENTETIC ACID POLYSORBATE 80 SUCROSE WATER

13.2 Animal Toxicology and/or Pharmacology In animal models, inhibition of PD-1 signaling increased the severity of some infections and enhanced inflammatory responses. Mycobacterium tuberculosis –infected PD-1 knockout mice exhibited markedly decreased survival compared with wild-type controls, which correlated with increased bacterial proliferation and inflammatory responses in these animals. PD-1 blockade using a primate anti-PD-1 antibody was also shown to exacerbate M. tuberculosis infection in rhesus macaques. PD-1 and PD-L1 knockout mice receiving PD-L1 blocking antibody have also shown decreased survival following infection with lymphocytic choriomeningitis virus. Inhibition of PD-1 and LAG-3 results in autoimmunity in preclinical models. Mice deficient in both PD-1 and LAG-3 develop lethal systemic autoimmunity that includes myocarditis. In a 1-month study in monkeys dosed with nivolumab and relatlimab, inflammation within the central nervous system (choroid plexus, vasculature, meninges, spinal cord) and the reproductive tract (epididymis, seminal vesicles, and testes) was observed.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility OPDUALAG contains nivolumab and relatlimab. No studies have been performed to assess the potential of nivolumab or relatlimab for carcinogenicity or genotoxicity. Fertility studies have not been performed with nivolumab or relatlimab.

13 NONCLINICAL TOXICOLOGY 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility OPDUALAG contains nivolumab and relatlimab. No studies have been performed to assess the potential of nivolumab or relatlimab for carcinogenicity or genotoxicity. Fertility studies have not been performed with nivolumab or relatlimab. 13.2 Animal Toxicology and/or Pharmacology In animal models, inhibition of PD-1 signaling increased the severity of some infections and enhanced inflammatory responses. Mycobacterium tuberculosis –infected PD-1 knockout mice exhibited markedly decreased survival compared with wild-type controls, which correlated with increased bacterial proliferation and inflammatory responses in these animals. PD-1 blockade using a primate anti-PD-1 antibody was also shown to exacerbate M. tuberculosis infection in rhesus macaques. PD-1 and PD-L1 knockout mice receiving PD-L1 blocking antibody have also shown decreased survival following infection with lymphocytic choriomeningitis virus. Inhibition of PD-1 and LAG-3 results in autoimmunity in preclinical models. Mice deficient in both PD-1 and LAG-3 develop lethal systemic autoimmunity that includes myocarditis. In a 1-month study in monkeys dosed with nivolumab and relatlimab, inflammation within the central nervous system (choroid plexus, vasculature, meninges, spinal cord) and the reproductive tract (epididymis, seminal vesicles, and testes) was observed.

BLA761234

OPDUALAG

nivolumab and relatlimab-rmbw

0003-7125

HUMAN PRESCRIPTION DRUG

INTRAVENOUS

OPDUALAG 240 mg and 80 mg/20 mL Representative Packaging NDC 0003-7125-11 Rx only Opdualag TM (nivolumab and relatlimab -rmbw) Injection 240 mg and 80 mg/20 mL (12 mg and 4 mg/mL) For Intravenous Infusion Only Single-dose vial; Discard unused portion. Please provide enclosed Medication Guide to the patient. Bristol Myers Squibb opdualag-carton.jpg

17 PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Medication Guide). Immune-Mediated Adverse Reactions (IMAR) Inform patients of the risk of IMARs that may require corticosteroid treatment and withholding or discontinuation of OPDUALAG, including: • Pneumonitis: Advise patients to contact their healthcare provider immediately for any new or worsening cough, chest pain, or shortness of breath [see Warnings and Precautions (5.1) ] . • Colitis: Advise patients to contact their healthcare provider immediately for diarrhea or severe abdominal pain [see Warnings and Precautions (5.1) ] . • Hepatitis: Advise patients to contact their healthcare provider immediately for jaundice, severe nausea or vomiting, pain on the right side of abdomen, lethargy, or easy bruising or bleeding [see Warnings and Precautions (5.1) ] . • Endocrinopathies: Advise patients to contact their healthcare provider immediately for signs or symptoms of hypophysitis, adrenal insufficiency, thyroiditis, hypothyroidism, hyperthyroidism, and diabetes mellitus [see Warnings and Precautions (5.1) ] . • Nephritis with Renal Dysfunction: Advise patients to contact their healthcare provider immediately for signs or symptoms of nephritis, including decreased urine output, blood in urine, swelling in ankles, loss of appetite, and any other symptoms of renal dysfunction [see Warnings and Precautions (5.1) ] . • Skin Adverse Reactions: Advise patients to contact their healthcare provider immediately for rash [see Warnings and Precautions (5.1) ] . • Myocarditis: Advise patients to contact their healthcare provider immediately for signs or symptoms of new or worsening chest pain, palpitations, shortness of breath, fatigue, or swelling in ankles [see Warnings and Precautions (5.1) ] . Infusion-Related Reactions • Advise patients of the potential risk of infusion-related reactions [see Warnings and Precautions (5.2) ] . Complications of Allogeneic HSCT • Advise patients of potential risk of post-transplant complications [see Warnings and Precautions (5.3) ] . Embryo-Fetal Toxicity • Advise females of reproductive potential of the potential risk to a fetus and to inform their healthcare provider of a known or suspected pregnancy [see Warnings and Precautions (5.4) , Use in Specific Populations (8.1) ] . • Advise females of reproductive potential to use effective contraception during treatment with OPDUALAG and for at least 5 months following the last dose [see Use in Specific Populations (8.3) ] . Lactation • Advise women not to breastfeed during treatment with OPDUALAG and for 5 months after the last dose [see Use in Specific Populations (8.2) ] . Manufactured by: Bristol-Myers Squibb Company Princeton, NJ 08543 USA U.S. License No. 1713

Medication Guide MEDICATION GUIDE OPDUALAG™ (op-DEW-uh-lag) (nivolumab and relatlimab-rmbw) injection What is the most important information I should know about OPDUALAG? OPDUALAG is a medicine that may treat a type of skin cancer called melanoma by working with your immune system. OPDUALAG can cause your immune system to attack normal organs and tissues in any area of your body and can affect the way they work. These problems can sometimes become severe or can lead to death. These problems may happen anytime during treatment or even after your treatment has ended. You may have more than one of these problems at the same time. Call or see your healthcare provider right away if you develop any new or worse signs of symptoms, including: Lung problems. • new or worsening cough • shortness of breath • chest pain Intestinal problems. • diarrhea (loose stools) or more frequent bowel movements than usual • stool that are black, tarry, sticky, or have blood or mucus • severe stomach-area (abdominal) pain or tenderness Liver problems. • yellowing of your skin or the whites of your eyes • severe nausea or vomiting • pain on the right side of your stomach area (abdomen) • dark urine (tea colored) • bleeding or bruising more easily than normal Hormone gland problems. • headaches that will not go away or unusual headaches • eye sensitivity to light • eye problems • rapid heartbeat • increased sweating • extreme tiredness • weight gain or weight loss • feeling more hungry or thirsty than usual • urinating more often than usual • hair loss • feeling cold • constipation • your voice gets deeper • dizziness or fainting • changes in mood or behavior, such as decreased sex drive, irritability, or forgetfulness Kidney problems. • decrease in your amount of urine • blood in your urine • swelling in your ankles • loss of appetite Skin problems. • rash • itching • skin blistering or peeling • painful sore or ulcers in mouth or nose, throat, or genital area Heart problems. • new or worse chest pain • irregular heartbeat or feel like your heart is racing • shortness of breath • tiredness • swelling in your ankles Problems can also happen in other organs and tissues. These are not all of the signs and symptoms of immune system problems that can happen with OPDUALAG. Call or see your healthcare provider right away for any new or worsening sign or symptoms, which may include: • Confusion, sleepiness, memory problems, changes in mood or behavior, stiff neck, balance problems, tingling or numbness of the arms or legs • Double vision, blurry vision, sensitivity to light, eye pain, changes in eyesight • Persistent or severe muscle pain or weakness, muscle cramps • Low red blood cells, bruising Getting medical treatment right away may keep these problems from becoming more serious. Your healthcare provider will check you for these problems during treatment with OPDUALAG. Your healthcare provider may treat you with corticosteroid or hormone replacement medicines. Your healthcare provider may also need to delay or completely stop treatment with OPDUALAG, if you have severe side effects. What is OPDUALAG? OPDUALAG is a prescription medicine used to treat: • adults and children 12 years of age or older with a type of skin cancer called melanoma that has spread or cannot be removed by surgery. It is not known if OPDUALAG is safe and effective when used: • in children 12 years of age or older who weigh less than 88 pounds (40 kg), or • in children younger than 12 years of age. Before you receive OPDUALAG, tell your healthcare provider if you: • have immune system problems such as Crohn’s disease, ulcerative colitis, or lupus • have received an organ transplant • have received or plan to receive a stem cell transplant that uses donor stem cells (allogeneic) • have a condition that affects your nervous system, such as myasthenia gravis or Guillain-Barré syndrome • are pregnant or plan to become pregnant. OPDUALAG can harm your unborn baby. Females who are able to become pregnant: o Your healthcare provider should do a pregnancy test before you start receiving OPDUALAG. o You should use an effective method of birth control during and for at least 5 months after the last dose of OPDUALAG. Talk to your healthcare provider about birth control methods that you can use during this time. o Tell your healthcare provider right away if you become pregnant during treatment with OPDUALAG. • are breastfeeding or plan to breastfeed. It is not known if OPDUALAG passes into your breast milk. Do not breastfeed during treatment with OPDUALAG and for 5 months after the last dose of OPDUALAG. Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. How will I receive OPDUALAG? • Your healthcare provider will give you OPDUALAG into your vein through an intravenous (IV) line over 30 minutes. • OPDUALAG is usually given every 4 weeks. • Your healthcare provider will decide how many treatments you need. • Your healthcare provider will do blood tests to check you for side effects. • If you miss any appointments, call your healthcare provider as soon as possible to reschedule your appointment. What are the possible side effects of OPDUALAG? OPDUALAG can cause serious side effects, including: • See “What is the most important information I should know about OPDUALAG?” • Severe infusion reactions. Tell your healthcare provider or nurse right away if you get these symptoms during an infusion of OPDUALAG: o chills or shaking o itching or rash o flushing o shortness of breath o dizziness o feel like passing out o fever o back or neck pain • Complications of stem cell transplant that uses donor stem cells (allogeneic). These complications can be severe and can lead to death. These complications may happen if you underwent transplantation either before or after being treated with OPDUALAG. Your healthcare provider will monitor you for signs of complications if you have an allogeneic stem cell transplant. The most common side effects of OPDUALAG include: • muscle and bone pain • tiredness • decreased red blood cell and white blood cell counts • increased liver function test results • rash • itching • diarrhea • decreased salt (sodium) in your blood These are not all the possible side effects of OPDUALAG. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. General information about the safe and effective use of OPDUALAG. Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. You can ask your pharmacist or healthcare provider for information about OPDUALAG that is written for health professionals. What are the ingredients in OPDUALAG? Active ingredients: nivolumab and relatlimab Inactive ingredients: histidine, L-histidine hydrochloride monohydrate, pentetic acid, polysorbate 80, sucrose, and Water for Injection. OPDUALAG™ is trademark of Bristol-Myers Squibb Company. Other brands listed are the trademarks of their respective owners. Manufactured by: Bristol-Myers Squibb Company Princeton, NJ 08543 USA U.S. License No. 1713 For more information, call 1-855-673-4861 or go to www.OPDUALAG.com. This Medication Guide has been approved by the U.S. Food and Drug Administration. Revised: March 2022

14 CLINICAL STUDIES The efficacy of OPDUALAG was investigated in RELATIVITY-047 (NCT03470922), a randomized (1:1), double-blinded trial in 714 patients with previously untreated metastatic or unresectable Stage III or IV melanoma. Patients were allowed to have received prior adjuvant or neoadjuvant melanoma therapy: anti-PD-1, anti-CTLA-4, or BRAF-MEK inhibitors were allowed if received at least 6 months between the last dose of therapy and date of recurrence; interferon therapy was allowed if the last dose was at least 6 weeks prior to randomization. The trial excluded patients with active autoimmune disease, medical conditions requiring systemic treatment with moderate or high dose corticosteroids or immunosuppressive medications, uveal melanoma, and active or untreated brain or leptomeningeal metastases. Patients were randomized to receive OPDUALAG (nivolumab 480 mg and relatlimab 160 mg) by intravenous infusion every 4 weeks (n=355) or nivolumab 480 mg by intravenous infusion every 4 weeks (n=359) until disease progression or unacceptable toxicity. Randomization was stratified by tumor PD-L1 expression (≥1% vs. <1%) using PD-L1 IHC 28-8 pharmDx test, LAG-3 expression (≥1% vs. <1%) using a clinical trial assay, BRAF V600 mutation status (V600 mutation positive vs. wild type), and M stage per the American Joint Committee on Cancer (AJCC) version 8 staging system (M0/M1any[0] vs. M1any[1]). The major efficacy outcome measure was progression-free survival (PFS) determined by Blinded Independent Central Review (BICR) using Response Evaluation Criteria in Solid Tumors (RECIST v1.1). Additional efficacy outcome measures were overall survival (OS) and overall response rate (ORR) determined by BICR using RECIST v1.1. Tumor assessments were conducted 12 weeks after randomization and continued every 8 weeks up to week 52 and then every 12 weeks. The trial population characteristics were: median age 63 years (range: 20 to 94); 58% male; 97% White 0.7% African American, and American Indian/Alaskan Native 0.1%; Hispanic 7%; and ECOG performance score was 0 (67%) or 1 (33%). Disease characteristics were: PD-L1 expression ≥1% (41%), LAG-3 expression ≥1% (75%), AJCC Stage IV disease (92%), M1c disease (39%); M1d disease (2.4%), elevated LDH (36%), and BRAF V600 mutation-positive melanoma (39%). The trial demonstrated a statistically significant improvement in PFS for patients randomized to the OPDUALAG arm compared with the nivolumab arm. The final analysis of OS was not statistically significant. Efficacy results are shown in Table 5 and Figure 1. Table 5: Efficacy Results in RELATIVITY-047 a Assessed by BICR. b Final PFS analysis. c Kaplan-Meier estimate. d Based on stratified Cox proportional hazard model. e Based on stratified log-rank test. f At the time of the final OS analysis, which was event-driven and occurred after the final PFS analysis. g Not Significant at alpha level 0.04302. h Not formally tested based on the testing hierarchy. NR = Not reached. OPDUALAG N=355 Nivolumab N=359 Progression-free Survival a,b Disease progression or death (%) 180 (51) 211 (59) Median (months) c (95% CI) 10.1 (6.4, 15.7) 4.6 (3.4, 5.6) Hazard ratio d (95% CI) 0.75 (0.62, 0.92) p-value e 0.0055 Overall Survival f Deaths (%) 137 (39) 160 (45) Median in months (95% CI) NR (34.2, NR) 34.10 (25.2, NR) Hazard ratio d (95% CI) 0.80 (0.64, 1.01) p-value e NS g Overall Response Rate a,f, h , n (%) (95% CI) 153 (43) (38, 48) 117 (33) (28, 38) Complete response rate (%) 58 (16) 51 (14) Partial response rate (%) 95 (27) 66 (18) Figure 1: Progression-free Survival - RELATIVITY-047 opdualag-figure-1.jpg

8.5 Geriatric Use Of the 355 patients treated with OPDUALAG in RELATIVITY-047, 47% of patients were 65 years or older, 29% were 65 to 74 years, 17% were 75 to 84 years, and 1.7% were 85 years and older. No overall differences in safety or effectiveness were observed between elderly patients and younger patients.

8.4 Pediatric Use The safety and effectiveness of OPDUALAG for the treatment of unresectable or metastatic melanoma have been established in pediatric patients 12 years of age or older who weigh at least 40 kg. Use of OPDUALAG for this indication is supported by evidence from an adequate and well-controlled study in adults and additional data analyses that suggest that nivolumab and relatlimab exposures in pediatric patients 12 years of age who weigh at least 40 kg are expected to result in similar safety and efficacy to that of adults. The pharmacokinetics of monoclonal antibodies and the course of unresectable or metastatic melanoma are sufficiently similar in adults and pediatric patients 12 years of age or older to allow extrapolation of data from adult patients to pediatric patients 12 years of age or older (who weigh at least 40 kg). A recommended dosage for pediatric patients 12 years of age or older who weigh less than 40 kg has not been established [see Adverse Reactions (6.1) , Clinical Pharmacology (12.3) , and Clinical Studies (14) ] . The safety and effectiveness of OPDUALAG have not been established in pediatric patients 12 years of age or older who weigh less than 40 kg, and pediatric patients younger than 12 years of age.

8.1 Pregnancy Risk Summary Based on findings in animals and mechanism of action, OPDUALAG can cause fetal harm when administered to a pregnant woman. Administration of nivolumab to cynomolgus monkeys from the onset of organogenesis through delivery resulted in increased abortion and premature infant death ( see Data ). Human IgG4 is known to cross the placenta; therefore, nivolumab and relatlimab have the potential to be transmitted from the mother to the developing fetus. The effects of OPDUALAG are likely to be greater during the second and third trimesters of pregnancy. There are no available data on OPDUALAG in pregnant women to evaluate a drug-associated risk. Advise the patient 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 is 2% to 4% and 15% to 20%, respectively. Data Animal Data OPDUALAG injection for intravenous use contains nivolumab and relatlimab [see Description (11) ] . Nivolumab: One function of the PD-1/PD-L1 pathway is to preserve pregnancy by maintaining immune tolerance to the fetus. The effects of nivolumab on prenatal and postnatal development were evaluated in monkeys that received nivolumab twice weekly from the onset of organogenesis through delivery, at exposure levels of between 9 and 42 times higher than those observed at the clinical dose of 3 mg/kg (based on AUC). Nivolumab administration resulted in a non-dose-related increase in spontaneous abortion and increased neonatal death. In surviving infants (18 of 32 compared to 11 of 16 vehicle-exposed infants) of cynomolgus monkeys treated with nivolumab, there were no apparent malformations and no effects on neurobehavioral, immunological, or clinical pathology parameters throughout the 6-month postnatal period. Relatlimab: There are no available animal data on relatlimab. The effects of a murine surrogate anti-LAG-3 antibody was evaluated in mice using syngeneic and allogeneic breeding models. When anti-LAG-3 antibodies were administered beginning on gestation day 6, there were no maternal or developmental effects in either syngeneic or allogeneic breedings.

8 USE IN SPECIFIC POPULATIONS • Lactation: Advise not to breastfeed. (8.2) 8.1 Pregnancy Risk Summary Based on findings in animals and mechanism of action, OPDUALAG can cause fetal harm when administered to a pregnant woman. Administration of nivolumab to cynomolgus monkeys from the onset of organogenesis through delivery resulted in increased abortion and premature infant death ( see Data ). Human IgG4 is known to cross the placenta; therefore, nivolumab and relatlimab have the potential to be transmitted from the mother to the developing fetus. The effects of OPDUALAG are likely to be greater during the second and third trimesters of pregnancy. There are no available data on OPDUALAG in pregnant women to evaluate a drug-associated risk. Advise the patient 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 is 2% to 4% and 15% to 20%, respectively. Data Animal Data OPDUALAG injection for intravenous use contains nivolumab and relatlimab [see Description (11) ] . Nivolumab: One function of the PD-1/PD-L1 pathway is to preserve pregnancy by maintaining immune tolerance to the fetus. The effects of nivolumab on prenatal and postnatal development were evaluated in monkeys that received nivolumab twice weekly from the onset of organogenesis through delivery, at exposure levels of between 9 and 42 times higher than those observed at the clinical dose of 3 mg/kg (based on AUC). Nivolumab administration resulted in a non-dose-related increase in spontaneous abortion and increased neonatal death. In surviving infants (18 of 32 compared to 11 of 16 vehicle-exposed infants) of cynomolgus monkeys treated with nivolumab, there were no apparent malformations and no effects on neurobehavioral, immunological, or clinical pathology parameters throughout the 6-month postnatal period. Relatlimab: There are no available animal data on relatlimab. The effects of a murine surrogate anti-LAG-3 antibody was evaluated in mice using syngeneic and allogeneic breeding models. When anti-LAG-3 antibodies were administered beginning on gestation day 6, there were no maternal or developmental effects in either syngeneic or allogeneic breedings. 8.2 Lactation Risk Summary There are no data on the presence of nivolumab and relatlimab in human milk, the effects on the breastfed child, or the effects on milk production. Because nivolumab and relatlimab may be excreted in human milk and because of the potential for serious adverse reactions in a breastfed child, advise patients not to breastfeed during treatment with OPDUALAG and for at least 5 months after the last dose [see Pharmacokinetics (12.3) ] . 8.3 Females and Males of Reproductive Potential OPDUALAG can cause fetal harm when administered to a pregnant woman [see Use in Specific Populations (8.1) ] . Pregnancy Testing Verify the pregnancy status of females of reproductive potential prior to initiating OPDUALAG [see Use in Specific Populations (8.1) ] . Contraception Advise females of reproductive potential to use effective contraception during treatment and for at least 5 months following the last dose of OPDUALAG [see Clinical Pharmacology (12.3) ] . 8.4 Pediatric Use The safety and effectiveness of OPDUALAG for the treatment of unresectable or metastatic melanoma have been established in pediatric patients 12 years of age or older who weigh at least 40 kg. Use of OPDUALAG for this indication is supported by evidence from an adequate and well-controlled study in adults and additional data analyses that suggest that nivolumab and relatlimab exposures in pediatric patients 12 years of age who weigh at least 40 kg are expected to result in similar safety and efficacy to that of adults. The pharmacokinetics of monoclonal antibodies and the course of unresectable or metastatic melanoma are sufficiently similar in adults and pediatric patients 12 years of age or older to allow extrapolation of data from adult patients to pediatric patients 12 years of age or older (who weigh at least 40 kg). A recommended dosage for pediatric patients 12 years of age or older who weigh less than 40 kg has not been established [see Adverse Reactions (6.1) , Clinical Pharmacology (12.3) , and Clinical Studies (14) ] . The safety and effectiveness of OPDUALAG have not been established in pediatric patients 12 years of age or older who weigh less than 40 kg, and pediatric patients younger than 12 years of age. 8.5 Geriatric Use Of the 355 patients treated with OPDUALAG in RELATIVITY-047, 47% of patients were 65 years or older, 29% were 65 to 74 years, 17% were 75 to 84 years, and 1.7% were 85 years and older. No overall differences in safety or effectiveness were observed between elderly patients and younger patients.

16 HOW SUPPLIED/STORAGE AND HANDLING OPDUALAG (nivolumab and relatlimab-rmbw) injection is a sterile, preservative-free, clear to opalescent, colorless to slightly yellow solution for intravenous use supplied in a single-dose vial containing 240 mg of nivolumab and 80 mg of relatlimab per 20 mL (12 mg and 4 mg per mL) per carton (NDC 0003-7125-11). Store OPDUALAG refrigerated at 2°C to 8°C (36°F to 46°F) in the original carton to protect from light until time of use. Do not freeze or shake.