Isatuximab

1 INDICATIONS AND USAGE SARCLISA ESCENA is indicated: in combination with pomalidomide and dexamethasone, for the treatment of adult patients with multiple myeloma who have received at least 1 prior line of therapy including lenalidomide and a proteasome inhibitor. in combination with carfilzomib and dexamethasone, for the treatment of adult patients with relapsed or refractory multiple myeloma who have received 1 to 3 prior lines of therapy. in combination with bortezomib, lenalidomide, and dexamethasone, for the treatment of adult patients with newly diagnosed multiple myeloma who are not eligible for autologous stem cell transplant (ASCT). SARCLISA ESCENA is a CD38-directed cytolytic antibody indicated: in combination with pomalidomide and dexamethasone, for the treatment of adult patients with multiple myeloma who have received at least 1 prior line of therapy including lenalidomide and a proteasome inhibitor. in combination with carfilzomib and dexamethasone, for the treatment of adult patients with relapsed or refractory multiple myeloma who have received 1 to 3 prior lines of therapy. in combination with bortezomib, lenalidomide and dexamethasone, for the treatment of adult patients with newly diagnosed multiple myeloma who are not eligible for autologous stem cell transplant (ASCT). ( 1 )

12.1 Mechanism of Action Isatuximab-irfc is an IgG1-derived monoclonal antibody that binds to CD38 expressed on the surface of hematopoietic and tumor cells, including multiple myeloma cells. Isatuximab-irfc induces apoptosis of tumor cells and activation of immune effector mechanisms including antibody-dependent cell-mediated cytotoxicity (ADCC), antibody-dependent cellular phagocytosis (ADCP), and complement dependent cytotoxicity (CDC). Isatuximab-irfc inhibits the ADP-ribosyl cyclase activity of CD38. Isatuximab-irfc can activate natural killer (NK) cells in the absence of CD38-positive target tumor cells and suppresses CD38-positive T-regulatory cells. The combination of isatuximab-irfc and pomalidomide enhanced ADCC activity and direct tumor cell killing compared to that of isatuximab-irfc alone in vitro, and enhanced antitumor activity compared to the activity of isatuximab-irfc or pomalidomide alone in a human multiple myeloma xenograft model.

2 DOSAGE AND ADMINISTRATION SARCLISA ESCENA and intravenous isatuximab-irfc have different dosage and route of administration instructions. Administer SARCLISA ESCENA only as a subcutaneous injection. Premedicate with dexamethasone, leukotriene receptor antagonist, acetaminophen, and diphenhydramine. ( 2.2 ) The recommended dosage of SARCLISA ESCENA is 1,400 mg administered as subcutaneous injection with the CirCLIQ™ On-Body Delivery System (OBDS) or with a syringe and infusion set for manual administration. See full prescribing information for SARCLISA ESCENA schedules of administration and drugs used in combination. ( 2.1 ) 2.1 Important Dosage Information SARCLISA ESCENA and intravenous isatuximab-irfc have different dosage and administration instructions [see Dosage and Administration (2.2) ] . SARCLISA ESCENA is for subcutaneous use only. Check the product label to ensure that the correct formulation (SARCLISA ESCENA or intravenous isatuximab-irfc) is being prescribed and administered. 2.2 Recommended Dosage Administer premedications before SARCLISA ESCENA administration [see Dosage and Administration (2.3) ] . SARCLISA ESCENA should be administered by a health care professional [see Warnings and Precautions (5.1) ] . Patients currently receiving intravenous isatuximab-irfc may transition to SARCLISA ESCENA solution for injection after the completion of the first cycle. The recommended dose of SARCLISA ESCENA is 1,400 mg administered as a subcutaneous injection with the CirCLIQ On-Body Delivery System (OBDS) or with a syringe and infusion set for manual administration, in combination with pomalidomide and dexamethasone or in combination with carfilzomib and dexamethasone, or in combination with bortezomib, lenalidomide, and dexamethasone. SARCLISA ESCENA dosing schedules are provided in Tables 1 and 2 [see Clinical Studies (14) ] . Table 1: SARCLISA ESCENA Dosing Schedule in Combination with Pomalidomide and Dexamethasone or in Combination with Carfilzomib and Dexamethasone Cycles Dosing schedules Cycle 1 (28-day cycle) Days 1, 8, 15, and 22 (weekly) Cycle 2 and beyond (28-day cycles) Days 1 and 15 (every 2 weeks) Table 2: SARCLISA ESCENA Dosing Schedule in Combination with Bortezomib, Lenalidomide, and Dexamethasone Cycles Dosing schedule Cycle 1 (28-day cycle) Days 1, 8, 15, 22 (weekly) Cycles 2 to 12 (28-day cycles) Days 1 and 15 (every 2 weeks) Cycles 13 and beyond (28-day cycles) Day 1 (every 4 weeks) Treatment is repeated until disease progression or unacceptable toxicity. SARCLISA ESCENA is used in combination with pomalidomide and dexamethasone or in combination with carfilzomib and dexamethasone or in combination with bortezomib, lenalidomide, and dexamethasone. For dosing instructions of combination agents administered with SARCLISA ESCENA, see Clinical Studies (14) and manufacturer's prescribing information. Missed SARCLISA ESCENA Doses If a planned dose of SARCLISA ESCENA is missed, administer the dose as soon as possible and adjust the treatment schedule accordingly, maintaining the treatment interval. 2.3 Recommended Premedications and Antimicrobial Prophylaxis Recommended Premedications Administer the following premedications 15 to 60 minutes prior to SARCLISA ESCENA administration to reduce the risk and severity of systemic administration reactions [see Warnings and Precautions (5.1) ] : When administered in combination with SARCLISA ESCENA and pomalidomide: Dexamethasone 40 mg orally or intravenously (or 20 mg orally or intravenously for patients 75 years of age or older). When administered in combination with SARCLISA ESCENA and carfilzomib: Dexamethasone 20 mg orally or intravenously. When administered in combination with SARCLISA ESCENA, bortezomib, and lenalidomide: Dexamethasone 20 mg orally. Leukotriene receptor antagonist, at cycle 1 only (Days 1, 8, 15, and 22). Acetaminophen 650 mg to 1,000 mg orally. Diphenhydramine 25 mg to 50 mg orally or intravenously (or equivalent). The intravenous route of

6 ADVERSE REACTIONS The following clinically significant adverse reactions from SARCLISA ESCENA are also described in other sections of the labeling: Hypersensitivity and Other Administration Reactions [see Warnings and Precautions (5.1) ] Neutropenia [see Warnings and Precautions (5.2) ] Infections [see Warnings and Precautions (5.3) ] Second Primary Malignancies [see Warnings and Precautions (5.4) ] In combination with pomalidomide and dexamethasone : The most common adverse reactions (≥20%) are upper respiratory tract infection, fatigue, pneumonia, musculoskeletal pain, and diarrhea. ( 6.1 ) In combination with carfilzomib and dexamethasone : The most common adverse reactions (≥20%) are upper respiratory tract infection and musculoskeletal pain. ( 6.1 ) In combination with bortezomib, lenalidomide and dexamethasone : The most common adverse reactions (≥20%) are peripheral neuropathy, constipation, diarrhea, fatigue, musculoskeletal pain, upper respiratory tract infections, injection site reaction, insomnia, edema, rash, and erythema. ( 6.1 ) The most common hematology laboratory abnormalities (≥40%) with SARCLISA ESCENA combination therapies are decreased neutrophils, decreased platelets, decreased hemoglobin, decreased leukocytes, and decreased lymphocytes. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact sanofi-aventis U.S. LLC at 1-800-633-1610 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Relapsed and/or Refractory Multiple Myeloma Combination treatment with pomalidomide and dexamethasone (SARCLISA ESCENA-Pd versus intravenous isatuximab-irfc-Pd) IRAKLIA The safety of SARCLISA ESCENA was evaluated in IRAKLIA, a randomized, open-label phase 3 clinical trial in patients with previously treated multiple myeloma. Patients received SARCLISA ESCENA 1,400 mg administered subcutaneously, weekly in the first cycle and every two weeks thereafter, in combination with pomalidomide and dexamethasone (SARCLISA ESCENA-Pd, n=263) or isatuximab-irfc administered intravenously in combination with pomalidomide and dexamethasone (intravenous isatuximab-irfc-Pd, n=264) [see Clinical Studies (14) ] . Among patients receiving SARCLISA ESCENA-Pd, 66% were exposed to SARCLISA ESCENA for 6 months or longer and 25% were exposed for greater than 12 months or longer. The median duration of the injection with OBDS was 13 minutes. Serious adverse reactions occurred in 53% of patients receiving SARCLISA ESCENA-Pd. Serious adverse reactions in ≥5% of patients who received SARCLISA ESCENA-Pd included pneumonia (20.5%). Fatal adverse reactions occurred in 4.9% of patients who received SARCLISA ESCENA-Pd, including pneumonia (1.5%), sepsis/septic shock (1.5%), death (0.8%), COVID-19, lower respiratory tract infection, hemorrhagic stroke, and sudden death (0.4% each). Permanent treatment discontinuation due to an adverse reaction occurred in 8% of patients who received SARCLISA ESCENA-Pd. Adverse reactions which resulted in permanent discontinuation of SARCLISA ESCENA-Pd in more than 1 patient included pneumonia, death, COVID-19, sepsis, anemia, and neutrophil count decreased. The most common adverse reactions (≥20%) were upper respiratory tract infection, fatigue, pneumonia, musculoskeletal pain, and diarrhea. The most common hematology laboratory abnormalities (≥40%) were decreased leukocytes, decreased neutrophils, decreased lymphocytes, decreased platelets, and decreased hemoglobin. Table 3 summarizes the adverse reactions in IRAKLIA. Table 3: Adverse Reactions (≥10%) in Patients Who Received SARCLISA ESCENA-Pd or Intravenous Isatuximab-irfc-Pd in IRAKLIA Adverse Reaction SARCLISA ESCENA-Pd (N=263) Intravenous isatuximab-irfc-Pd (N=264) All Grades (%) G

5 WARNINGS AND PRECAUTIONS Hypersensitivity and Other Administration Reactions: In case of grade ≥2 systemic administration reaction (SAR), interrupt SARCLISA ESCENA and manage medically. In case of grade 4 SAR, permanently discontinue SARCLISA ESCENA. ( 5.1 ) Neutropenia : Monitor complete blood cell counts periodically during treatment. Monitor patients with neutropenia for signs of infection. SARCLISA ESCENA dose delays and the use of colony-stimulating factor may be required to allow improvement of neutrophil count. ( 5.2 ) Infections : SARCLISA ESCENA may cause serious and fatal infections. Monitor patients for signs and symptoms of infection and treat appropriately. ( 5.3 ) Second Primary Malignancies (SPM) : Monitor patients for the development of second primary malignancies. ( 5.4 ) Laboratory Test Interference : Interference with Serological Testing (Indirect Antiglobulin Test): Type and screen patients prior to starting treatment. Inform blood banks that a patient has received isatuximab-irfc. ( 5.5 , 7.1 ) Interference with Serum Protein Electrophoresis and Immunofixation Tests: isatuximab-irfc may interfere with the assays used to monitor M-protein, which may impact the determination of complete response. ( 5.5 , 7.1 ) Embryo-Fetal Toxicity : Can cause fetal harm. Advise patients of the potential risk to a fetus and to use effective contraception. ( 5.6 , 8.1 , 8.3 ) 5.1 Hypersensitivity and Other Administration Reactions SARCLISA ESCENA can cause both systemic administration-related reactions (SARs), including severe or life-threatening reactions, and local injection-site reactions. Systemic Administration Reactions In a pooled safety population of 411 patients with multiple myeloma who received SARCLISA ESCENA in combination with pomalidomide and dexamethasone (Pd), with carfilzomib and dexamethasone (Kd), and with bortezomib, lenalidomide, and dexamethasone (VRd) (IRAKLIA, IZALCO, and IsaSoCut, respectively, N=411), SARs occurred in 3.2% (Grade 1: 2.2%, Grade 2: 0.7%, Grade 3: 0.2%) of patients. SARs occurred at the first administration in 1.9% of patients and at subsequent administrations in 1.5% of patients. The median time to onset was 4 hours (range: 12 minutes to 3 days). The most frequently reported symptoms of SARs (all below 1%) were pyrexia and dyspnea, and Grade ≥3 symptoms was dyspnea (not collected in IsaSoCut study) [see Dosage and Administration (2.3) and Adverse Reactions (6.1) ] . In multiple myeloma clinical trials with intravenous isatuximab-irfc, anaphylactic reactions occurred in <1% of patients. To decrease the risk and severity of SARs, premedicate patients prior to SARCLISA ESCENA administration with leukotriene receptor antagonists (at cycle 1 only), acetaminophen, diphenhydramine, or equivalent, and dexamethasone [see Dosage and Administration (2.2) ] . In case of grade 2 SAR during SARCLISA ESCENA administration, stop current administration and do not complete it. Administer additional premedication, as needed, for subsequent SARCLISA ESCENA administration. In case of grade 3 SAR during SARCLISA ESCENA administration, stop current administration and do not complete it. SARCLISA ESCENA administration may be resumed at the next planned administration. In case of a third occurrence of a grade 3 SAR, permanently discontinue SARCLISA ESCENA treatment. In case of grade 4 SAR, permanently discontinue SARCLISA ESCENA treatment. Injection Site Reactions In clinical trials of SARCLISA ESCENA in combination with Pd, Kd, or VRd (IRAKLIA, IZALCO, and IsaSoCut, respectively, N=411), injection site reactions (ISRs) with SARCLISA ESCENA administration were reported in 9% (8% Grade 1 and 1.5% Grade 2) of patients and in 0.86% of injections. Among the SARCLISA ESCENA injections with ISRs, 82% occurred the day of the administration and 4.2% were delayed by at least 3 days. With SARCLISA ESCENA-Pd and SARCLISA ESCENA-Kd, 5% of patients experienced symptoms of ISR (not collected in IsaSoCut study). The most

4 CONTRAINDICATIONS SARCLISA ESCENA is contraindicated in patients with severe hypersensitivity to isatuximab-irfc or to any of its excipients [see Warnings and Precautions (5.1) ] . Patients with severe hypersensitivity to isatuximab-irfc or to any of its excipients. ( 4 )