Efficacy consistent with IV SARCLISA1,3
Noninferiority was reached for the major efficacy outcomes of ORR* and Ctrough at steady state1,2†

Steady state Ctrough GMR was 1.53 (90% CI: 1.32, 1.78).1
*ORR results were assessed by an IRC based on central laboratory data for M-protein and central radiologic imaging review using the IMWG criteria.1
†The noninferiority margin of ORR was 0.84 (calculated as 40% retention of the observed historical clinical benefit of the ORR ratio of 0.75 [upper 95% CI of the Pd to SARCLISA + Pd rate ratio in ICARIA-MM]). The noninferiority margin for cycle 6 day 1 predose Ctrough was 0.8.2
Ctrough=trough concentration; GMR=geometric mean ratio; IMWG=International Myeloma Working Group; IRC=independent review committee; IV=intravenous; M-protein=monoclonal protein; ORR=overall response rate; Pd=pomalidomide and dexamethasone; RR=relative risk; RRMM=relapsed or refractory multiple myeloma.
Trial design1

IRAKLIA, a multicenter, multinational, randomized, open-label, 2-arm, phase 3 study, evaluated SARCLISA ESCENA with CirCLIQ + Pd vs IV SARCLISA + Pd in patients with RRMM who had received at least one prior line of therapy, including lenalidomide and a proteasome inhibitor. Major efficacy outcomes assessing noninferiority: ORR and Ctrough at steady state (corresponding to predose at cycle 6 day 1).
Treatment was administered in both groups in 28-day cycles until disease progression or unacceptable toxicity. In both treatment arms, SARCLISA ESCENA or IV SARCLISA was administered weekly in the first cycle and every 2 weeks thereafter. Pomalidomide 4 mg was taken orally once daily from day 1 to day 21 of each 28-day cycle. Dexamethasone 40 mg (20 mg for patients ≥75 years of age) was taken orally on days 1, 8, 15, and 22 of each 28-day cycle.
aAdministered weekly in cycle 1.
q2w=every 2 weeks.
Safety
The safety profile of SARCLISA ESCENA with CirCLIQ + Pd was consistent with IV SARCLISA + Pd. The incidence of systemic administration reactions was lower with the subcutaneous route of administration.1,2
Fewer systemic administration reactions1

Systemic administration reactions2
- Most systemic administration reactions were grade 1 or 2
- Grade 3 systemic administration reactions occurred in 0.4% of patients receiving SARCLISA ESCENA + Pd vs 1.1% of patients receiving IV SARCLISA + Pd. No grade 4 systemic administration reactions occurred
- The median time to onset of systemic administration reaction was 6.5 hours with SARCLISA ESCENA vs 1.0 hour with IV SARCLISA
- Systemic administration reactions did not lead to any treatment discontinuations in the SARCLISA ESCENA arm vs 0.8% of patients in the IV SARCLISA arm
Local reactions2
- Injection site reactions were reported in 11 (4.2%) patients in the SARCLISA ESCENA + Pd arm, representing 19 of 5,145 (0.4%) injections
- All injection site reactions were grade 1 except one grade 2 event
- Most injection site reactions (78.9%) occurred on injection day, and most (89.5%) resolved within 1 day
- The most frequent injection site reactions were injection site erythema, injection site pain, and injection site swelling
- No treatment discontinuations occurred due to injection site reactions
Serious adverse reactions1
- 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)
Adverse reactions (≥10%) in patients who received SARCLISA ESCENA with CirCLIQ + Pd vs IV SARCLISA + Pd1
| Adverse reaction | SARCLISA ESCENA with CirCLIQ + Pd
(n=263) | IV SARCLISA + Pd
(n=264) | ||
| All grades | Grade 3 or 4 | All grades | Grade 3 or 4 | |
| Infections and infestations | ||||
| Upper respiratory tract infectiona | 39% | 4.2% | 37% | 3.4% |
| Pneumoniab | 27%c | 19% | 28%d | 20% |
| COVID-19e | 14%f | 4.6% | 18% | 4.2% |
| Musculoskeletal and connective tissue disorders | ||||
| Musculoskeletal paing | 23% | 2.3% | 24% | 3% |
| Gastrointestinal disorders | ||||
| Diarrhea | 20% | 4.6% | 20% | 0.8% |
| Constipation | 14% | 0% | 13% | 0% |
| General disorders and administration site conditions | ||||
| Fatigueh | 29% | 4.9% | 22% | 1.5% |
| Peripheral edema | 8% | 0% | 12% | 1.1% |
| Systemic administration reaction | 1.5% | 0.4% | 25% | 1.1% |
| Psychiatric disorders | ||||
| Insomnia | 15% | 2.7% | 15% | 4.5% |
a Upper respiratory tract infection is a grouping of viral, bacterial, fungal, and pathogen unspecified infections.
b Pneumonia is a grouping of pneumonia from viral, fungal, and bacterial origins.
c Includes 5 patients (1.9%) with fatal pneumonia.
d Includes 4 patients (1.5%) with fatal pneumonia.
e COVID-19 is a grouping of coronavirus infections.
f Includes 1 patient (0.4%) with fatal COVID-19.
g Musculoskeletal pain includes: arthralgia, arthritis, back pain, bone pain, musculoskeletal chest pain, musculoskeletal discomfort, musculoskeletal pain, myalgia, neck pain, noncardiac chest pain, pain in extremity, and spinal pain.
h Fatigue includes: fatigue, asthenia, malaise.
Laboratory abnormalities that worsened (≥30%) from baseline in patients who received SARCLISA ESCENA + Pd vs IV SARCLISA + Pd
| Laboratory abnormality | SARCLISA ESCENA with CirCLIQ + Pd
(n=263) | IV SARCLISA + Pd
(n=264) | ||
| All grades | Grade 3 or 4 | All grades | Grade 3 or 4 | |
| Hematology | ||||
| Decreased leukocytes | 98% | 62% | 90% | 56% |
| Decreased neutrophils | 97% | 85% | 93% | 74% |
| Decreased lymphocytes | 92% | 49% | 85% | 41% |
| Decreased platelets | 77% | 26% | 73% | 23% |
| Decreased hemoglobin | 56% | 13% | 47% | 13% |
| Chemistry | ||||
| Decreased calcium | 48% | 0.8% | 49% | 0.4% |
| Decreased magnesium | 43% | 0.4% | 47% | 0% |
| Decreased albumin | 40% | 1.9% | 39% | 1.9% |
| Increased alanine aminotransferase | 34% | 1.9% | 35% | 0.8% |
| Decreased sodium | 33% | 6% | 31% | 4.2% |
| Increased creatinine | 32% | 5% | 23% | 2.7% |
| Increased alkaline phosphatase | 30% | 0.8% | 26% | 0% |
The denominator used for the percentage calculation is the number of patients with at least 1 evaluation of the laboratory test during the considered observation period.
Indication
References: 1. SARCLISA ESCENA. Prescribing information. sanofi-aventis U.S. LLC; 2026. 2. Ailawadhi S, Špička I, Spencer A, et al. Isatuximab subcutaneous by on-body injector versus isatuximab intravenous plus pomalidomide and dexamethasone in relapsed/refractory multiple myeloma: phase III IRAKLIA study. J Clin Oncol. 2025;43(22):2527-2537. doi:10.1200/JCO-25-00744 3. SARCLISA. Prescribing information. sanofi-aventis U.S. LLC; 2026.
