Ipilimumab

INDICATIONS AND USAGE YERVOY is a human cytotoxic T-lymphocyte antigen 4 (CTLA-4)-blocking antibody indicated for: Melanoma • Treatment of unresectable or metastatic melanoma in adults and pediatric patients 12 years and older as a single agent or in combination with nivolumab. (1.1) • Adjuvant treatment of adult patients with cutaneous melanoma with pathologic involvement of regional lymph nodes of more than 1 mm who have undergone complete resection, including total lymphadenectomy. (1.2) Renal Cell Carcinoma (RCC) • Treatment of adult patients with intermediate or poor risk advanced renal cell carcinoma, as first-line treatment in combination with nivolumab. (1.3) Colorectal Cancer • Treatment of adults and pediatric patients 12 years and older with unresectable or metastatic microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) colorectal cancer (CRC) in combination with nivolumab. (1.4) Hepatocellular Carcinoma • adult patients with unresectable or metastatic hepatocellular carcinoma (HCC) as first-line treatment in combination with nivolumab. ( 1.5 ) • in combination with nivolumab in adult patients with unresectable or metastatic HCC who have been previously treated with sorafenib. (1.5) Non-Small Cell Lung Cancer (NSCLC) • Treatment of adult patients with metastatic non-small cell lung cancer expressing PD-L1 (≥1%) as determined by an FDA-approved test, with no EGFR or ALK genomic tumor aberrations, as first-line treatment in combination with nivolumab. (1.6) • Treatment of adult patients with metastatic or recurrent non-small cell lung cancer with no EGFR or ALK genomic tumor aberrations as first-line treatment, in combination with nivolumab and 2 cycles of platinum-doublet chemotherapy. (1.6) Malignant Pleural Mesothelioma • Treatment of adult patients with unresectable malignant pleural mesothelioma, as first-line treatment in combination with nivolumab. (1.7) Esophageal Cancer • Treatment of adult patients with unresectable advanced or metastatic esophageal squamous cell carcinoma, as first line treatment in combination with nivolumab whose tumors express PD-L1 (≥1). (1.8) 1.1 Unresectable or Metastatic Melanoma YERVOY, as a single agent or in combination with nivolumab, is indicated for the treatment of unresectable or metastatic melanoma in adult and pediatric patients 12 years and older. 1.2 Adjuvant Treatment of Melanoma YERVOY is indicated for the adjuvant treatment of adult patients with cutaneous melanoma with pathologic involvement of regional lymph nodes of more than 1 mm who have undergone complete resection, including total lymphadenectomy. 1.3 Advanced Renal Cell Carcinoma YERVOY, in combination with nivolumab, is indicated for the first-line treatment of adult patients with intermediate or poor risk advanced renal cell carcinoma (RCC). 1.4 Microsatellite Instability-High or Mismatch Repair Deficient Metastatic Colorectal Cancer • YERVOY, in combination with nivolumab, is indicated for the treatment of adult and pediatric patients 12 years and older with unresectable or metastatic microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) colorectal cancer ( CRC ). 1.5 Hepatocellular Carcinoma • YERVOY, in combination with nivolumab, is indicated for the first-line treatment of adult patients with unresectable or metastatic hepatocellular carcinoma (HCC). • YERVOY, in combination with nivolumab, is indicated for the treatment of adult patients with unresectable or metastatic HCC who have been previously treated with sorafenib. 1.6 Metastatic Non-Small Cell Lung Cancer YERVOY, in combination with nivolumab, is indicated for the first-line treatment of adult patients with metastatic non-small cell lung cancer (NSCLC) whose tumors express PD-L1 (≥1%) as determined by an FDA-approved test [see Dosage and Administration (2.1) ] , with no EGFR or ALK genomic tumor aberrations. YERVOY, in combination with nivolumab and 2 cycles of platinum-doublet chemotherapy, is indicated for the first-line treatment of adult patients with metastatic or recurrent NSCLC, with no EGFR or ALK genomic tumor aberrations. 1.7 Malignant Pleural Mesothelioma YERVOY, in combination with nivolumab, is indicated for the first-line treatment of adult patients with unresectable malignant pleural mesothelioma. 1.8 Esophageal Cancer YERVOY, in combination with nivolumab, is indicated for the first-line treatment of adult patients with unresectable advanced or metastatic esophageal squamous cell carcinoma (ESCC) whose tumors express PD-L1 (≥1) [see Dosage and Administration (2.1) ] .

DOSAGE AND ADMINISTRATION • Administer by intravenous infusion after dilution based upon recommended infusion rate for each indication. (2) • Unresectable or Metastatic Melanoma : ∘ YERVOY 3 mg/kg every 3 weeks for a maximum of 4 doses. (2.2) ∘ YERVOY 3 mg/kg immediately following nivolumab 1 mg/kg on the same day, every 3 weeks for 4 doses. After completing 4 doses of the combination, administer nivolumab as a single agent as recommended in the Full Prescribing Information for nivolumab. (2.2) • Adjuvant Treatment of Melanoma : YERVOY 3 mg/kg every 3 weeks for 4 doses, followed by 3 mg/kg every 12 weeks for up to 4 additional doses. (2.2) • Advanced Renal Cell Carcinoma : YERVOY 1 mg/kg immediately following nivolumab 3 mg/kg on the same day, every 3 weeks for 4 doses. After completing 4 doses of the combination, administer nivolumab as a single agent as recommended in Full Prescribing Information for nivolumab. (2.2) • Treatment of microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) colorectal cancer in combination with nivolumab : ∘ Adult and pediatric patients weighing 40 kg or greater: YERVOY 1 mg/kg immediately following nivolumab 240 mg on the same day every 3 weeks for a maximum of 4 doses. After completing the combination, administer nivolumab as a single agent as recommended in Full Prescribing Information for nivolumab. (2.2) ∘ Pediatric patients weighing less than 40 kg: YERVOY 1 mg/kg immediately following nivolumab 3 mg/kg on the same day every 3 weeks for a maximum of 4 doses. After completing the combination, administer nivolumab as a single agent as recommended in Full Prescribing Information for nivolumab. ( 2.2 ) • Hepatocellular Carcinoma : YERVOY 3 mg/kg intravenously over 30 minutes immediately following nivolumab 1 mg/kg intravenously over 30 minutes on the same day, every 3 weeks for up to 4 doses. After completing up to 4 doses of the combination, administer nivolumab as a single agent as recommended in Full Prescribing Information for nivolumab. (2.2) • Metastatic non-small cell lung cancer : ∘ YERVOY 1 mg/kg every 6 weeks with nivolumab 360 mg every 3 weeks. (2.2) ∘ YERVOY 1 mg/kg every 6 weeks with nivolumab 360 mg every 3 weeks and 2 cycles of platinum-doublet chemotherapy. (2.2) • Malignant pleural mesothelioma : YERVOY 1 mg/kg every 6 weeks with nivolumab 360 mg every 3 weeks. (2.2) • Esophageal squamous cell carcinoma: YERVOY 1 mg/kg every 6 weeks with nivolumab 3 mg/kg every 2 weeks or 360 mg every 3 weeks. (2.2) • See full Prescribing Information for preparation and administration instructions and dosage modifications for adverse reactions. 2.1 Patient Selection Information on FDA-approved tests for patient selection is available at: https://www.fda.gov/CompanionDiagnostics Non-Small Cell Lung Cancer • Select patients with metastatic NSCLC for treatment with YERVOY in combination with nivolumab based on PD-L1 expression [see Clinical Studies (14.6) ] . Esophageal Cancer • Select patients with unresectable or advanced or metastatic ESCC for treatment with YERVOY in combination with nivolumab based on PD-L1 expression [see Clinical Studies (14.8) ] . • An FDA-approved companion diagnostic for the detection of PD-L1 expression in patients with advanced or metastatic ESCC is not available. 2.2 Recommended Dosage The recommended dosages of YERVOY as a single agent are presented in Table 1. Administer YERVOY as a 30-minute intravenous infusion [see Preparation and Administration (2.4) ] . Table 1: Recommended Dosages for YERVOY as a Single Agent Indication Recommended YERVOY Dosage Duration of Therapy Unresectable or metastatic melanoma 3 mg/kg every 3 weeks Maximum of 4 doses Adjuvant treatment of melanoma 3 mg/kg every 3 weeks followed by 3 mg/kg every 12 weeks Every 3 weeks up to a maximum of 4 doses Every 12 weeks for up to 4 additional doses The recommended dosages of YERVOY in combination with other therapeutic agents are presented in Table 2. Administer YERVOY on the same day as other therapeutic agents. Refer to the respective Prescribing Information for each therapeutic agent administered in combination with YERVOY for recommended dosage information, as appropriate. Table 2: Recommended Dosages of YERVOY in Combination with Other Therapeutic Agents* * Refer to the Prescribing Information for the agents administered in combination with YERVOY for recommended dosing information, as appropriate. † Refer to the Prescribing Information for nivolumab for dosage information after completing use in combination with YERVOY. Indication Recommended YERVOY Dosage Duration of Therapy Unresectable or metastatic melanoma 3 mg/kg every 3 weeks with nivolumab 1 mg/kg In combination with nivolumab for a maximum of 4 doses or until unacceptable toxicity, whichever occurs earlier. After completing 4 doses of combination therapy, administer nivolumab as a single agent until disease progression or unacceptable toxicity.† Advanced renal cell carcinoma 1 mg/kg every 3 weeks with nivolumab 3 mg/kg In combination with nivolumab for a maximum of 4 doses. After completing 4 doses of combination therapy, administer nivolumab as single agent until disease progression or unacceptable toxicity. † Microsatellite instability-high (MSI‑H) or mismatch repair deficient (dMMR) metastatic colorectal cancer Adult patients and pediatric patients age 12 years and older and weighing 40 kg or more: 1 mg/kg every 3 weeks with nivolumab 240 mg In combination with nivolumab for a maximum of 4 doses . † After completing 4 doses of combination therapy, administer nivolumab as single agent until disease progression, unacceptable toxicity , or up to 2 years . † Pediatric patients age 12 years and older and weighing less than 40 kg: 1 mg/kg every 3 weeks with nivolumab 3 mg/kg Hepatocellular carcinoma 3 mg/kg every 3 weeks with nivolumab 1 mg/kg In combination with nivolumab for a maximum of 4 doses. After completing a maximum of 4 doses of combination therapy, administer nivolumab as single agent until disease progression or unacceptable toxicity. † Metastatic non-small cell lung cancer expressing PD‑L1 1 mg/kg every 6 weeks with nivolumab 360 mg every 3 weeks In combination with nivolumab until disease progression, unacceptable toxicity, or up to 2 years in patients without disease progression. † Metastatic or recurrent non-small cell lung cancer 1 mg/kg every 6 weeks with nivolumab 360 mg every 3 weeks and histology-based platinum‑doublet chemotherapy every 3 weeks In combination with nivolumab until disease progression, unacceptable toxicity, or up to 2 years in patients without disease progression. † 2 cycles of histology-based platinum-doublet chemotherapy Malignant pleural mesothelioma 1 mg/kg every 6 weeks with nivolumab 360 mg every 3 weeks In combination with nivolumab until disease progression, unacceptable toxicity, or up to 2 years in patients without disease progression. † Esophageal squamous cell carcinoma 1 mg/kg every 6 weeks with nivolumab 3 mg/kg every 2 weeks or 360 mg every 3 weeks In combination with nivolumab until disease progression, unacceptable toxicity, or up to 2 years. 2.3 Recommended Dosage Modifications for Adverse Reactions No dose reduction for YERVOY is recommended. In general, withhold YERVOY for severe (Grade 3) immune-mediated adverse reactions. Permanently discontinue YERVOY for life-threatening (Grade 4) immune-mediated adverse reactions, recurrent severe (Grade 3) immune-mediated reactions that require systemic immunosuppressive treatment, persistent moderate (Grade 2) or severe (Grade 3) reactions lasting 12 weeks or longer after last YERVOY dose (excluding endocrinopathy), 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 YERVOY or YERVOY in combination with nivolumab for adverse reactions that require management different from these general guidelines are summarized in Table 3. When Y

WARNINGS AND PRECAUTIONS • Severe and Fatal Immune-Mediated Adverse Reactions : Immune-mediated adverse reactions (IMAR) can occur in any organ system or tissue, including the following: immune-mediated colitis, immune-mediated hepatitis, immune-mediated dermatologic adverse reactions, immune-mediated endocrinopathies, immune-mediated pneumonitis, and immune-mediated nephritis with renal dysfunction, and can occur at any time during treatment or after discontinuation. Monitor for symptoms and signs that may be clinical manifestations of IMAR. Evaluate clinical chemistries including liver enzymes, creatinine, adrenocorticotropic hormone level and thyroid function including at baseline and before each dose. In general, withhold YERVOY for severe (grade 3) and permanently discontinue for life-threatening (grade 4) immune-mediated adverse reactions. See Full Prescribing Information for additional dosage modifications. ( 2.3 , 5.1 ) • Infusion-Related Reactions : Discontinue for severe and life-threatening infusion-related reactions. Interrupt or slow the rate of infusion in patients with mild or moderate infusion-related reactions. ( 2.3 , 5.2 ) • Complications of allogeneic HSCT : Fatal and other serious complications can occur in patients who receive allogeneic HSCT before or after being treated with YERVOY. (5.3) • Embryo-Fetal Toxicity : Can cause fetal harm. Advise of potential risk to a fetus and use of effective contraception. ( 5.4 , 8.1 , 8.3 ) 5.1 Severe and Fatal Immune-Mediated Adverse Reactions YERVOY is a fully human monoclonal antibody that blocks T-cell inhibitory signals induced by the CTLA-4 pathway, thereby removing inhibition of the immune response with the potential for induction of immune-mediated adverse reactions. Immune-mediated adverse reactions listed herein may not be inclusive of all possible severe and fatal immune-mediated reactions. Immune-mediated adverse reactions, which may be severe or fatal, can occur in any organ system or tissue. Immune-mediated adverse reactions can occur at any time after starting YERVOY. While immune-mediated adverse reactions usually manifest during treatment, immune-mediated adverse reactions can also manifest after discontinuation of YERVOY. Early identification and management are essential to ensure safe use of YERVOY. Monitor for signs and symptoms that may be clinical manifestations of underlying immune-mediated adverse reactions. Evaluate clinical chemistries including liver enzymes, creatinine, adrenocorticotropic hormone (ACTH) level, and thyroid function at baseline and before each dose. Institute medical management promptly, including specialty consultation as appropriate. Withhold or permanently discontinue YERVOY depending on severity [see Dosage and Administration (2.3) ]. In general, if YERVOY requires interruption or discontinuation, administer systemic corticosteroid therapy (1 to 2 mg/kg/day prednisone or equivalent) until improvement to Grade 1 or less. Upon improvement to Grade 1 or less, initiate corticosteroid taper and continue to taper over at least 1 month. Consider administration of other systemic immunosuppressants in patients whose immune-mediated adverse reactions are not controlled with corticosteroid therapy. Immune-Mediated Colitis YERVOY can cause immune-mediated colitis, which may be fatal. Cytomegalovirus (CMV) infection/reactivation has been reported in patients with corticosteroid-refractory immune-mediated colitis. In cases of corticosteroid-refractory colitis, consider repeating infectious workup to exclude alternative etiologies. YERVOY 3 mg/kg as a Single Agent Immune-mediated colitis occurred in 12% (62/511) of patients who received YERVOY 3 mg/kg as a single agent, including Grade 3-5 (7%) and Grade 2 (5%). Colitis led to permanent discontinuation of YERVOY in 4.3% and withholding of at least one dose of YERVOY in 0.2% of patients. Systemic corticosteroids were required in 74% (46/62) of patients with immune-mediated colitis. Five patients required coadministration of another immunosuppressant with corticosteroids. Colitis resolved in 76% of the 62 patients. One patient was withheld one or more doses of YERVOY for colitis, and no patient received additional treatment after symptom improvement. YERVOY 1 mg/kg with 3 mg/kg Nivolumab Immune-mediated colitis occurred in 9% (60/666) of patients who received YERVOY 1 mg/kg with nivolumab for the treatment of RCC or mCRC, including Grade 3 (4.4%), and Grade 2 (3.7%). Colitis led to permanent discontinuation of YERVOY and nivolumab in 3.2% and withholding of YERVOY and nivolumab in 2.7% of patients. In patients who received YERVOY 1 mg/kg with nivolumab, use of systemic corticosteroids was one of the diagnostic criteria required to identify immune-mediated colitis. Systemic corticosteroids were therefore required in 100% (60/60) of patients with immune-mediated colitis. Approximately 23% of patients required coadministration of another immunosuppressant with corticosteroids. Colitis resolved in 95% of the 60 patients. Of the 18 patients in whom YERVOY or nivolumab was withheld for colitis, 16 received additional treatment after symptom improvement; of these, 10 had recurrence of colitis. YERVOY 3 mg/kg with 1 mg/kg Nivolumab Immune-mediated colitis occurred in 25% (115/456) of patients with melanoma or HCC receiving YERVOY 3 mg/kg with nivolumab 1 mg/kg every 3 weeks, including Grade 4 (0.4%), Grade 3 (14%), and Grade 2 (8%) adverse reactions. Colitis led to permanent discontinuation of YERVOY with nivolumab in 14% and withholding of treatment in 4.4% of patients. Systemic corticosteroids were required in 100% (115/115) of patients with colitis. Approximately 23% of patients required addition of infliximab to high-dose corticosteroids. Colitis resolved in 93% of 115 patients. Of the 20 patients in whom YERVOY with nivolumab was withheld for colitis, 16 reinitiated treatment after symptom improvement, and 9 had recurrence of colitis. Immune-Mediated Hepatitis YERVOY 3 mg/kg as a Single Agent Immune-mediated hepatitis occurred in 4.1% (21/511) of patients who received YERVOY 3 mg/kg as a single agent, including Grade 3-5 (1.6%) and Grade 2 (2.5%). Hepatitis led to permanent discontinuation of YERVOY in 0.4% of patients and withholding of at least one dose of YERVOY in none of the patients. Systemic corticosteroids were required in 29% (6/21) of patients with immune-mediated hepatitis. No patients required the coadministration of another immunosuppressant with corticosteroids. Hepatitis resolved in 86% of the 21 patients. YERVOY 3 mg/kg with Vemurafenib The safety and effectiveness of YERVOY in combination with vemurafenib have not been established [see Indications and Usage (1) ] . In a dose-finding trial, Grade 3 increases in transaminases with or without concomitant increases in total bilirubin occurred in 6 of 10 patients who received concurrent YERVOY (3 mg/kg) and vemurafenib (960 mg or 720 mg twice daily). YERVOY 1 mg/kg with 3 mg/kg Nivolumab Immune-mediated hepatitis occurred in 7% (48/666) of patients who received YERVOY 1 mg/kg with nivolumab for the treatment of RCC or mCRC, including Grade 4 (1.2%), Grade 3 (4.9%), and Grade 2 (0.4%). Hepatitis led to permanent discontinuation of YERVOY and nivolumab in 3.6% and withholding of YERVOY and nivolumab in 2.6% of patients. In patients who received YERVOY 1 mg/kg with nivolumab, use of systemic corticosteroids was one of the diagnostic criteria required to identify immune-mediated hepatitis. Systemic corticosteroids were therefore required in 100% (48/48) of patients with immune-mediated hepatitis. Approximately 19% of patients required coadministration of another immunosuppressant with corticosteroids. Hepatitis resolved in 88% of the 48 patients. Of the 17 patients in whom YERVOY or nivolumab was withheld for hepatitis, 14 received additional treatment after symptom improvement; of these, 10 had recurrence of hepatitis. YERVOY 3 mg/kg with 1 mg/kg Nivolu

CONTRAINDICATIONS None. • None. (4)

ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in the labeling: • Severe and fatal immune-mediated adverse reactions [see Warnings and Precautions (5.1) ] . • Infusion-related reactions [see Warnings and Precautions (5.2) ] . Most common adverse reactions (≥20%) with YERVOY as a single agent are fatigue, diarrhea, pruritus, rash, nausea, and headache. (6.1) Most common adverse reactions (≥20%) with YERVOY in combination with nivolumab are fatigue, diarrhea, rash, pruritus, nausea, musculoskeletal pain, pyrexia, cough, decreased appetite, vomiting, abdominal pain, dyspnea, upper respiratory tract infection, arthralgia, headache, hypothyroidism, constipation, decreased weight, and dizziness. (6.1) Most common adverse reactions (≥20%) with YERVOY in combination with nivolumab and platinum-doublet chemotherapy are fatigue, musculoskeletal pain, nausea, diarrhea, rash, decreased appetite, constipation, and pruritus. (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 with rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. The data described in the Warnings and Precautions section reflect exposure to YERVOY 3 mg/kg as a single agent (or in combination with an investigational gp100 peptide vaccine) in 511 patients in Study MDX010-20; YERVOY 1 mg/kg administered with nivolumab 3 mg/kg in 1,362 patients in CHECKMATE-214, CHECKMATE-142, CHECKMATE-227, and CHECKMATE-743; YERVOY 3 mg/kg administered with nivolumab 1 mg/kg in 456 patients enrolled in CHECKMATE-067, CHECKMATE-040, and another randomized trial; and to YERVOY 1 mg/kg, administered in combination with nivolumab and platinum-doublet chemotherapy in CHECKMATE-9LA. Unresectable or Metastatic Melanoma The safety of YERVOY was evaluated in 643 previously treated patients with unresectable or metastatic melanoma in Study MDX010-20 [see Clinical Studies (14.1) ] . Study MDX010-20 excluded patients with active autoimmune disease or those receiving systemic immunosuppression for organ transplantation. Patients received YERVOY 3 mg/kg by intravenous infusion for 4 doses as a single agent (n=131), YERVOY with an investigational gp100 peptide vaccine (n=380), or gp100 peptide vaccine as a single agent (n=132). Patients in the trial received a median of 4 doses (range: 1 to 4 doses). The trial population characteristics were: median age 57 years (range: 19 to 90), 59% male, 94% White, and baseline ECOG performance status 0 (56%). YERVOY was discontinued for adverse reactions in 10% of patients. Table 4 presents adverse reactions from Study MDX010-20. Table 4: Selected Adverse Reactions (≥5%) in Patients Receiving YERVOY with a Difference Between Arms of >5% for All Grades and >1% for Grades 3 to 5 Compared to gp100 Peptide Vaccine in Study MDX010-20 Adverse Reactions YERVOY 3 mg/kg n=131 YERVOY 3 mg/kg and gp100 n=380 gp100 n=132 All Grades (%) Grade 3 to 5 (%) All Grades (%) Grade 3 to 5 (%) All Grades (%) Grade 3 to 5 (%) General and Administration-Site Conditions Fatigue 41 7 34 5 31 3 Gastrointestinal Diarrhea 32 5 37 4 20 1 Colitis 8 5 5 3 2 0 Dermatologic Pruritus 31 0 21 <1 11 0 Rash 29 2 25 2 8 0 Unresectable or Metastatic Melanoma: In Combination with Nivolumab The safety of YERVOY, administered with nivolumab or as a single agent, was evaluated in CHECKMATE-067, a randomized (1:1:1), double-blind trial in 937 patients with previously untreated, unresectable or metastatic melanoma [see Clinical Studies (14.1) ]. The trial excluded patients with autoimmune disease, a medical condition requiring systemic treatment with corticosteroids (more than 10 mg daily prednisone equivalent) or other immunosuppressive medication within 14 days of the start of study therapy, a positive test result for hepatitis B or C, or a history of HIV. Patients were randomized to receive: • YERVOY 3 mg/kg by intravenous infusion over 90 minutes with nivolumab 1 mg/kg by intravenous infusion every 3 weeks for 4 doses followed by nivolumab as a single agent at a dose of 3 mg/kg by intravenous infusion every 2 weeks (YERVOY and nivolumab arm; n=313), or • Nivolumab 3 mg/kg by intravenous infusion every 2 weeks (nivolumab arm; n=313), or • YERVOY 3 mg/kg by intravenous infusion over 90 minutes every 3 weeks for up to 4 doses (YERVOY arm; n=311). The median duration of exposure to nivolumab was 2.8 months (range: 1 day to 36.4 months) for the YERVOY and nivolumab arm. In the YERVOY and nivolumab arm, 39% were exposed to nivolumab for ≥6 months and 30% exposed for >1 year. Serious adverse reactions (74%), adverse reactions leading to permanent discontinuation (47%) or to dosing delays (58%), and Grade 3 or 4 adverse reactions (72%) occurred in patients treated with YERVOY and nivolumab. The most frequent (≥10%) serious adverse reactions in the YERVOY and nivolumab arm were diarrhea (13%), colitis (10%), and pyrexia (10%). The most frequent adverse reactions leading to discontinuation of both drugs in the YERVOY and nivolumab arm were colitis (10%), diarrhea (8%), increased ALT (4.8%), increased AST (4.5%), and pneumonitis (1.9%). The most common (≥20%) adverse reactions in the YERVOY and nivolumab arm were fatigue, diarrhea, rash, nausea, pyrexia, pruritus, musculoskeletal pain, vomiting, decreased appetite, cough, headache, dyspnea, upper respiratory tract infection, arthralgia, and increased transaminases. Tables 5 and 6 summarize the incidence of adverse reactions and laboratory abnormalities, respectively, in CHECKMATE-067. Table 5: Adverse Reactions Occurring in ≥10% of Patients on the YERVOY and Nivolumab Arm or the Nivolumab Arm and at a Higher Incidence than in the YERVOY Arm (Between Arm Difference of ≥5% All Grades or ≥2% Grades 3-4) - CHECKMATE-067 Toxicity was graded per NCI CTCAE v4. a Includes asthenia and fatigue. b Includes pustular rash, dermatitis, acneiform dermatitis, allergic dermatitis, atopic dermatitis, bullous dermatitis, exfoliative dermatitis, psoriasiform dermatitis, drug eruption, exfoliative rash, erythematous rash, generalized rash, macular rash, maculopapular rash, morbilliform rash, papular rash, papulosquamous rash, and pruritic rash. c Includes back pain, bone pain, musculoskeletal chest pain, musculoskeletal discomfort, myalgia, neck pain, pain in extremity, and spinal pain. d Includes upper respiratory tract infection, nasopharyngitis, pharyngitis, and rhinitis. e Includes hypertension and blood pressure increased. Adverse Reaction YERVOY and Nivolumab (n=313) Nivolumab (n=313) YERVOY (n=311) All Grades (%) Grades 3-4 (%) All Grades (%) Grades 3-4 (%) All Grades (%) Grades 3-4 (%) General Fatigue a 62 7 59 1.6 51 4.2 Pyrexia 40 1.6 16 0 18 0.6 Gastrointestinal Diarrhea 54 11 36 5 47 7 Nausea 44 3.8 30 0.6 31 1.9 Vomiting 31 3.8 20 1.0 17 1.6 Skin and Subcutaneous Tissue Rash b 53 6 40 1.9 42 3.5 Vitiligo 9 0 10 0.3 5 0 Musculoskeletal and Connective Tissue Musculoskeletal pain c 32 2.6 42 3.8 36 1.9 Arthralgia 21 0.3 21 1.0 16 0.3 Metabolism and Nutrition Decreased appetite 29 1.9 22 0 24 1.3 Respiratory, Thoracic and Mediastinal Cough/productive cough 27 0.3 28 0.6 22 0 Dyspnea/exertional dyspnea 24 2.9 18 1.3 17 0.6 Infections Upper respiratory tract infection d 23 0 22 0.3 17 0 Endocrine Hypothyroidism 19 0.6 11 0 5 0 Hyperthyroidism 11 1.3 6 0 1 0 Investigations Decreased weight 12 0 7 0 7 0.3 Vascular Hypertension e 7 2.2 11 5 9 2.3 Clinically important adverse reactions in <10% of patients who received YERVOY with nivolumab: Gastrointestinal Disorders: stomatitis, intestinal perforation Skin and Subcutaneous Tissue Disorders: vitiligo Musculoskeletal and Connective Tissue Disorders: myopathy, Sjogren’s syndrom

Mechanism of Action CTLA-4 is a negative regulator of T-cell activity. Ipilimumab is a monoclonal antibody that binds to CTLA-4 and blocks the interaction of CTLA-4 with its ligands, CD80/CD86. Blockade of CTLA-4 has been shown to augment T-cell activation and proliferation, including the activation and proliferation of tumor infiltrating T-effector cells. Inhibition of CTLA-4 signaling can also reduce T-regulatory cell function, which may contribute to a general increase in T-cell responsiveness, including the anti-tumor immune response.