Abatacept

12.1 Mechanism of Action Abatacept, a selective costimulation modulator, inhibits T-cell (T lymphocyte) activation by binding to CD80 and CD86, thereby blocking interaction with CD28. This interaction provides a costimulatory signal necessary for full activation of T lymphocytes. Activated T lymphocytes are implicated in the pathogenesis of RA, pJIA and PsA and are found in the synovium of patients with RA, pJIA and PsA. In vitro , abatacept decreases T-cell proliferation and inhibits the production of the cytokines TNF alpha (TNFα), interferon-γ, and interleukin-2. In a rat collagen-induced arthritis model, abatacept suppresses inflammation, decreases anti-collagen antibody production, and reduces antigen specific production of interferon-γ. The relationship of these biological response markers to the mechanisms by which ORENCIA exerts its clinical effects is unknown.

1 INDICATIONS AND USAGE ORENCIA is a selective T cell costimulation modulator indicated for: • the treatment of adult patients with moderately to severely active rheumatoid arthritis (RA). (1.1) • the treatment of patients 2 years of age and older with moderately to severely active polyarticular juvenile idiopathic arthritis (pJIA). (1.2) • the treatment of patients 2 years of age and older with active psoriatic arthritis (PsA). (1.3) • the prophylaxis of acute graft versus host disease (aGVHD), in combination with a calcineurin inhibitor and methotrexate, in adults and pediatric patients 2 years of age and older undergoing hematopoietic stem cell transplantation (HSCT) from a matched or 1 allele-mismatched unrelated donor. (1.4) Limitations of Use: Concomitant use of ORENCIA with other immunosuppressives [e.g., biologic disease-modifying antirheumatic drugs (bDMARDS), Janus kinase (JAK) inhibitors] is not recommended. ( 1.5 , 5.1) 1.1 Adult Rheumatoid Arthritis ORENCIA ® is indicated for the treatment of adult patients with moderately to severely active rheumatoid arthritis (RA). 1.2 Polyarticular Juvenile Idiopathic Arthritis ORENCIA is indicated for the treatment of patients 2 years of age and older with moderately to severely active polyarticular juvenile idiopathic arthritis (pJIA). 1.3 Psoriatic Arthritis ORENCIA is indicated for the treatment of patients 2 years of age and older with active psoriatic arthritis (PsA). 1.4 Prophylaxis for Acute Graft versus Host Disease ORENCIA is indicated for the prophylaxis of acute graft versus host disease (aGVHD), in combination with a calcineurin inhibitor and methotrexate, in adults and pediatric patients 2 years of age and older undergoing hematopoietic stem cell transplantation (HSCT) from a matched or 1 allele-mismatched unrelated-donor. 1.5 Limitations of Use The concomitant use of ORENCIA with other potent immunosuppressants [e.g., biologic disease-modifying antirheumatic drugs (bDMARDs), Janus kinase (JAK) inhibit

2 DOSAGE AND ADMINISTRATION Intravenous Use for Adult RA (2.1) and Adult PsA (2.3) • Administer at 0, 2, and 4 weeks, and every 4 weeks thereafter, as a 30-minute infusion Body Weight of Patient Dose Number of Vials Less than 60 kg 500 mg 2 60 to 100 kg 750 mg 3 More than 100 kg 1,000 mg 4 Subcutaneous Use for Adult RA (2.1) • Prior to the first subcutaneous dose, may administer an optional loading dose as a single intravenous infusion as per body weight categories above. • Administer 125 mg by subcutaneous injection once weekly (within a day of the intravenous infusion if infusion given). • Patients switching from intravenous use to subcutaneous use, administer first subcutaneous dose instead of next scheduled intravenous dose. Intravenous Use for pJIA in Pediatric Patients ≥6 Years Old (2.2) • Pediatric patients weighing <75 kg administer 10 mg/kg intravenously and those weighing ≥75 kg administer the adult intravenous dosing regimen (not to exceed a maximum dose of 1,000 mg), as a 30-minute infusion. • Subsequently administer infusions at 2 and 4 weeks and every 4 weeks thereafter. Subcutaneous Use for pJIA and PsA in Pediatric Patients ≥2 Years Old (2.2) • Administer subcutaneously without an intravenous loading dose Body Weight of Pediatric Patient Dose (once weekly) 10 kg to less than 25 kg 50 mg 25 kg to less than 50 kg 87.5 mg 50 kg or more 125 mg Subcutaneous Use for Adult PsA ( 2.3 ) • Administer 125 mg by subcutaneous injection once weekly without an intravenous loading dose. • Patients switching from intravenous use to subcutaneous use, administer first subcutaneous dose instead of next scheduled intravenous dose. Intravenous Use for Prophylaxis of aGVHD (2.4) • For patients 6 years and older, administer at a 10 mg/kg dose (maximum dose 1,000 mg) as a 60-minute infusion on the day before transplantation, followed by a dose on Day 5, 14, and 28 after transplant. • For patients 2 to less than 6 years old, administer a 15 mg/kg dose as a 60-minute infusion on the day before transplantation, followed by a 12 mg/kg dose as a 60-minute infusion on Day 5, 14, and 28 after transplant. Preparation and Administration Instructions ( 2.5 , 2.6 ) • Administer as a 30-minute intravenous infusion for RA, pJIA, and adult PsA. (2.5) • Administer as a 60-minute intravenous infusion for aGVHD prophylaxis. (2.5) • See the Full Prescribing Information for preparation and administration instructions for intravenous infusion and recommendations for subcutaneous use. (2.5, 2.6) Prepare ORENCIA using only the silicone-free disposable syringe. (2.5) 2.1 Dosage in Adult Rheumatoid Arthritis For adult patients with RA, administer as an intravenous infusion or as a subcutaneous injection. ORENCIA may be used as monotherapy or concomitantly with disease-modifying antirheumatic drugs (DMARDs) other than JAK inhibitors or bDMARDs (e.g., TNF antagonists). Intravenous Dosage Reconstitute ORENCIA lyophilized powder and administer after dilution [see Dosage and Administration (2.5) ] as a 30-minute intravenous infusion utilizing the weight range-based dosing recommended in Table 1. Following the initial intravenous infusion, administer as an intravenous infusion at 2 and 4 weeks and every 4 weeks thereafter. Table 1: Dose of ORENCIA for Intravenous Infusion in Adult RA Patients Body Weight of Adult Patient Dose Number of Vials a a Each vial provides 250 mg of abatacept for administration. Less than 60 kg 500 mg 2 60 to 100 kg 750 mg 3 More than 100 kg 1,000 mg 4 Subcutaneous Dosage Prior to the first subcutaneous dose, an optional loading dose may be administered as a single intravenous infusion (as per body weight categories in Table 1). If an intravenous loading dose is used, administer the first subcutaneous injection within one day of the infusion. Administer ORENCIA 125 mg in prefilled syringes or in ORENCIA ClickJect™ autoinjector by subcutaneous injection once weekly [see Dosage and Administration (2.6) ] . For patients switching from ORENCIA intravenous therapy to subcutaneous administration, administer the first subcutaneous dose instead of the next scheduled intravenous dose. 2.2 Dosage in Polyarticular Juvenile Idiopathic Arthritis For pediatric patients with pJIA, either administer ORENCIA as an intravenous infusion (only patients 6 years of age and older) or as a subcutaneous injection (only patients 2 years of age and older) [see Use in Specific Populations (8.4) ] . ORENCIA may be used as monotherapy or concomitantly with methotrexate. Intravenous Dosage Administer ORENCIA as a 30-minute intravenous infusion based on body weight [see Dosage and Administration (2.5) ] : • For body weight less than 75 kg, administer a dose of 10 mg/kg. • For body weight of 75 kg or greater, administer as per the recommendations in Table 1 (follow the adult intravenous dosing regimen), not to exceed a maximum dose of 1,000 mg. Following the initial intravenous infusion, administer infusions at 2 and 4 weeks and every 4 weeks thereafter

6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in the labeling: • Increased Risk of Infection with Concomitant Use with TNF Antagonists, Other Biologic RA/PsA Therapy, or JAK Inhibitors [see Warnings and Precautions (5.1) ] • Hypersensitivity Reactions [see Warnings and Precautions (5.2) ] • Infections [see Warnings and Precautions (5.3) ] • Increased Risk of Adverse Reactions When Used in Patients with Chronic Obstructive Pulmonary Disease (COPD) [see Warnings and Precautions (5.5) ] • Immunosuppression [see Warnings and Precautions (5.6) ] • Cytomegalovirus (CMV) and Epstein-Barr Virus (EBV) Reactivation in aGVHD Prophylaxis after Hematopoietic Stem Cell Transplant (HSCT) [see Warnings and Precautions (5.7) ] • Most common adverse events (≥10%) in RA are headache, upper respiratory tract infection, nasopharyngitis, and nausea. (6.1) • Most common adverse reactions (≥10%) in prophylaxis of aGVHD are anemia, hypertension, CMV reactivation/CMV infection, pyrexia, pneumonia, epistaxis, CD4 lymphocytes decreased, hypermagnesemia, and acute kidney injury. (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 and controlled 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 predict the rates observed in a broader patient population in clinical practice. Adverse Reactions in Adult Patients with RA Adverse Reactions in Adult Patients with RA Treated with Intravenous ORENCIA The data from placebo-controlled studies described herein reflect exposure to ORENCIA administered intravenously in patients with active RA (1955 patients with ORENCIA, 989 with placebo) (Studies I through VI) [see Clinical Studies (14.1) ] . The studies had either a double-blind, placebo-controlled period of 6 months (258 patients with ORENCIA, 133 with placebo) or 1 year (1697 patients with ORENCIA, 856 with placebo). A subset of these patients received concomitant biologic DMARD therapy, such as a TNF antagonist (204 patients with ORENCIA, 134 with placebo). The concomitant use of ORENCIA with a TNF antagonist is not recommended [see Indications and Usage (1.5) ] . The majority of patients in RA clinical studies received one or more of the following concomitant medications with ORENCIA: methotrexate, nonsteroidal anti-inflammatory drugs (NSAIDs), corticosteroids, TNF antagonist, azathioprine, chloroquine, gold, hydroxychloroquine, leflunomide, sulfasalazine, and anakinra. The most serious adverse reactions were serious infections and malignancies. The most commonly reported adverse events (occurring in ≥10% of patients treated with ORENCIA) were headache, upper respiratory tract infection, nasopharyngitis, and nausea. The adverse reactions most frequently resulting in clinical intervention (interruption or discontinuation of ORENCIA) were due to infection. The most frequently reported infections resulting in dose interruption were upper respiratory tract infection (1%), bronchitis (0.7%), and herpes zoster (0.7%). The most frequent infections resulting in discontinuation were pneumonia (0.2%), localized infection (0.2%), and bronchitis (0.1%). Most Common Adverse Reactions in Adult Patients with RA Treated with Intravenous ORENCIA Adverse reactions occurring in 3% or more of patients and at least 1% more frequently in ORENCIA-treated patients (intravenous) during placebo-controlled RA studies are summarized in Table 4. Table 4: Most Common Adverse Reactions* During Placebo-Controlled RA Studies of Intravenous ORENCIA Intravenous ORENCIA (n=1955) a Placebo (n=989) b * Occurred in ≥3% patients and >1% more frequently in ORENCIA-treated patients. a Includes 204 patients on concomitant biologic DMARDs (adalimumab, anakinra, etanercept, or infliximab). b Includes 134 patients on concomitant biologic DMARDs (adalimumab, anakinra, etanercept, or infliximab). Headache 18% 13% Nasopharyngitis 12% 9% Dizziness 9% 7% Cough 8% 7% Back pain 7% 6% Hypertension 7% 4% Dyspepsia 6% 4% Urinary tract infection 6% 5% Rash 4% 3% Pain in extremity 3% 2% Infections in Adult Patients with RA Treated with Intravenous ORENCIA In the placebo-controlled trials in patients with RA, infections were reported in 54% of intravenous ORENCIA-treated patients and 48% of placebo-treated patients. The most commonly reported infections (reported in 5%-13% of patients) were upper respiratory tract infection, nasopharyngitis, sinusitis, urinary tract infection, influenza, and bronchitis. Other infections reported in fewer than 5% of patients at a higher frequency (>0.5%) with ORENCIA compared to placebo, were rhinitis, herpes simplex, and pneumonia [see Warnings and Precautions (5.3) ] . Serious infections were reported in 3% of patients treated w

7 DRUG INTERACTIONS 7.1 Immunosuppressants Concomitant administration of a TNF antagonist with ORENCIA has been associated with an increased risk of serious infections and no significant additional efficacy over use of the TNF antagonists alone. Concurrent therapy with ORENCIA and TNF antagonists is not recommended [see Warnings and Precautions (5.1) ]. There is insufficient experience to assess the safety and efficacy of ORENCIA administered concurrently with other biologic RA therapy, such as anakinra, or other biologic PsA therapy, and JAK inhibitors and therefore such use is not recommended. [see Warnings and Precautions (5.1) ] . 7.2 Blood Glucose Testing Parenteral drug products containing maltose can interfere with the readings of blood glucose monitors that use test strips with glucose dehydrogenase pyrroloquinoline quinone (GDH-PQQ). The GDH-PQQ based glucose monitoring systems may react with the maltose present in ORENCIA for intravenous administration, resulting in falsely elevated blood glucose readings on the day of infusion. When receiving intravenous ORENCIA, patients that require blood glucose monitoring should be advised to consider methods that do not react with maltose, such as those based on glucose dehydrogenase nicotine adenine dinucleotide (GDH-NAD), glucose oxidase, or glucose hexokinase test methods. ORENCIA for subcutaneous administration does not contain maltose; therefore, patients do not need to alter their glucose monitoring.