FDA clears Sarclisa Escena on-body injector for Sanofi (NASDAQ: SNY)
Rhea-AI Filing Summary
Sanofi reports that the US FDA has approved subcutaneous Sarclisa Escena (isatuximab-irfc) for multiple myeloma in combination with standard regimens across all existing Sarclisa IV indications. Sarclisa Escena becomes the first anticancer treatment administered via an on-body injector or manual subcutaneous injection.
The pivotal IRAKLIA phase 3 non-inferiority study showed Sarclisa Escena delivered by on-body injector achieved a 71.1% objective response rate versus 70.5% with IV Sarclisa, with a similar overall safety profile but markedly fewer systemic administration reactions, 1.5% versus 25%. Injection site reactions occurred in 0.4% of 5,145 on-body injections, nearly all mild. Sarclisa Escena is given as a fixed 1,400 mg subcutaneous dose and Sarclisa-based regimens have treated more than 70,000 patients worldwide, with approvals in almost 60 countries across several multiple myeloma indications.
Positive
- US FDA approval of Sarclisa Escena subcutaneous formulation with an on-body injector for multiple myeloma, extending use across all existing Sarclisa IV indications and reinforcing Sanofi’s oncology franchise.
Negative
- None.
Filing Explained
The July 10 press release furnished in Sanofi’s July 2026 Form 6-K shows Sarclisa SC’s regulatory status is not uniform: it is approved in the EU and UK, while Japan has approved manual injection but its CirCLIQ on-body-injector submission remains under review.
Key Figures
Key Terms
on-body injector medical
objective response rate medical
injection site reactions medical
relapsed or refractory multiple myeloma medical
pivotal phase 3 non-inferiority study medical
AI-generated analysis. How Rhea-AI works. Not financial advice.
FAQ
What did Sanofi (SNY) announce regarding Sarclisa Escena in the US?
How effective was Sarclisa Escena in the IRAKLIA phase 3 study for Sanofi (SNY)?
What safety differences were seen between subcutaneous and IV Sarclisa in Sanofi’s IRAKLIA study?
What is unique about the Sarclisa Escena on-body injector used by Sanofi (SNY)?
How widely is Sarclisa already used according to Sanofi’s 6-K filing?
What dosing regimen was evaluated for Sarclisa Escena in Sanofi’s IRAKLIA trial?
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934
For the month of July 2026
Commission File Number: 001-31368
SANOFI
(Translation of registrant’s name into English)
46, avenue de la Grande Armée, 75017 Paris, FRANCE
(Address of principal executive offices)
Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.
Form 20-F ☒ Form 40-F ☐
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In July 2026, Sanofi published the press release attached hereto as Exhibit 99.1 which is incorporated herein by reference.
Exhibit Index
| Exhibit No. | Description |
| Exhibit 99.1 | Press Release dated July 10, 2026: Sanofi’s subcutaneous Sarclisa Escena approved in the US as first anticancer treatment administered via on-body injector. |
2
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
| Dated: July 17, 2026 | SANOFI |
| By | /s/ Alexandra Roger |
|||
| Name: Alexandra Roger Title: Head of Legal Corporate & Finance |
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Exhibit 99.1
| Press Release |
|
Sanofi’s subcutaneous Sarclisa Escena approved in the US as first anticancer treatment administered via on-body injector
| • | Sarclisa Escena administered via the CirCLIQ® on-body injector (OBI) offers a treatment experience designed with patients and HCPs in mind |
| • | The first anticancer treatment to be administered through an OBI, and the first MM treatment available by both SC OBI and manual SC administration in the US |
| • | Efficacy of Sarclisa now available in SC formulation with innovative OBI across approved combinations and lines of therapy |
Paris, July 10, 2026. The US Food and Drug Administration (FDA) has approved subcutaneous (SC) Sarclisa (isatuximab-irfc) Escena in combination with standard-of-care regimens for the treatment of patients with multiple myeloma (MM) across all existing indications of Sarclisa intravenous (IV) formulation. With the approval, Sarclisa Escena is the first anticancer treatment to be administered through both an on-body injector (OBI) and manual SC administration.
The FDA approval was supported by multiple studies, including the pivotal IRAKLIA phase 3 non-inferiority study, which demonstrated Sarclisa Escena administered subcutaneously via an OBI provided similar efficacy, pharmacokinetics and safety compared to IV infusion, along with a significantly shorter treatment time and fewer infusion-related reactions.
“Multiple myeloma is a malignancy that often requires frequent IV infusions or manual subcutaneous injections. Treatment administration can be a cumbersome experience for patients, while also placing a strain on providers by requiring physical effort to push high-resistance syringes for several minutes,” said Sikander Ailawadhi, MD, Professor of Medicine, Division of Hematology/Oncology at Mayo Clinic Florida, US, and the principal investigator of the IRAKLIA study. “The comparable efficacy observed across multiple studies and the patient-centric design of the OBI offers an opportunity to impact the patient experience while upholding Sarclisa’s consistent efficacy.”
The studies were conducted using Enable Injections’ hands-free OBI, an automated injector designed to deliver subcutaneously high-volume medicines with the push of a button, to administer Sarclisa Escena. The OBI uses a retractable 30g needle that is shorter and thinner compared to the needles commonly used for large-volume injections. The approval of Sarclisa Escena with Enable Injections’ CirCLIQ OBI – developed using the enFuse® platform – offers the potential to change the overall patient experience in MM treatment.
“Sarclisa is the cornerstone of our oncology franchise, and we have always been confident in it being widely adopted as a potential best-in-class therapy,” said Manuela Buxo, Executive Vice President, Head of Specialty Care at Sanofi. “The approval of Sarclisa Escena subcutaneous formulation administered with the CirCLIQ is a definitive step in this direction. More than 70,000 patients worldwide have benefitted from Sarclisa, delivering predictable and important efficacy and safety across multiple combinations and lines of therapy. Today, we are proud to bring innovation that will empower physicians to enhance the treatment experience for patients, offering greater simplicity, flexibility and convenience.”
In addition, the CirCLIQ may streamline the administration process for providers, offering the potential to reduce the physical burden on nurses with a hands-free device and providing more freedom for patient monitoring and interaction.
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“The introduction of Sarclisa Escena with the innovative CirCLIQ on-body injector represents a significant advancement in multiple myeloma care,” said Donna D. Catamero, ANP-BC, OCN, CCRC, Associate Director, Myeloma Research; Adjunct Faculty, Mount Sinai Phillips School of Nursing and International Myeloma Foundation Nurse Leadership Board member. “For nurses and physicians treating patients with multiple myeloma, this automated system has the potential to meaningfully reduce administrative burden, simplifying how therapy is delivered and giving healthcare teams more capacity to focus on their patients.”
In the IRAKLIA phase 3 study, the first to incorporate the use of an OBI in the treatment of MM, Sarclisa SC administered via an OBI in combination with pomalidomide and dexamethasone (Pd) resulted in a 71.1% (187/263) objective response rate (ORR), compared to 70.5% (189/268) with Sarclisa IV-Pd, establishing non-inferiority (relative risk 1.008; 95% confidence interval: 0.903-1.126), in adult patients with relapsed or refractory MM (R/R MM) who have received at least one prior line of treatment.
The overall safety profile of Sarclisa SC-Pd observed in this study was consistent with the established safety profile of Sarclisa IV-Pd. While 25% of patients treated with Sarclisa IV-Pd experienced systemic administration reactions, 1.5% of patients treated with Sarclisa SC-Pd experienced those reactions. No new safety concerns were observed, except for injection site reactions (ISRs) that occurred in 0.4% of OBI injections (n=19/5,145 injections). Nearly all ISRs were grade 1, except for one episode of grade 2.
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.
Sarclisa is currently approved across three indications in the US, including in combination with bortezomib, lenalidomide and dexamethasone in newly diagnosed multiple myeloma (NDMM) patients not eligible for autologous stem cell transplant. In R/R MM, Sarclisa is approved in combination with Pd in patients who have received ≥two prior therapies, including lenalidomide and a proteasome inhibitor and have relapsed on the last therapy, as well as in combination with carfilzomib and dexamethasone in patients who have received one to three prior lines of therapy.
About the IRAKLIA study
IRAKLIA (clinical study identifier: NCT05405166) was a randomized, open-label, pivotal phase 3 study evaluating the non-inferiority of Sarclisa Escena administered at a fixed dose of 1,400 mg SC in combination with Pd via OBI versus weight-based dosed Sarclisa IV in combination with Pd in adult patients with R/R MM who have received at least one prior line of therapy. The major efficacy measures were ORR, defined as the proportion of patients with stringent complete response (CR), CR, very good partial response, and partial response according to the 2016 International Myeloma Working Group criteria assessed by Independent Review Committee, and observed Sarclisa Escena mean concentration before dosing (Ctrough) at steady state (pre-dose at cycle 6, dose 1 [C6D1]), defined as observed Sarclisa Escena plasma concentrations.
About Enable Injections
Cincinnati-based Enable Injections is a global healthcare innovation company committed to improving the patient treatment experience through the development and manufacturing of the enFuse® On-Body Delivery System. An innovative wearable technology, the enFuse system is designed to deliver large volumes of pharmaceutical and biologic therapeutics via subcutaneous administration, with the aim of improving convenience, supporting superior outcomes, and advancing healthcare system economics.
For more information, visit www.enableinjections.com.
About Sarclisa
Sarclisa (isatuximab-irfc) has been approved in almost 60 countries across four indications for certain patients with NDMM and R/R MM.
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Sarclisa-based regimens have been prescribed to treat more than 70,000 patients worldwide.
Sarclisa SC (Sarclisa Escena in the US), the subcutaneous formulation of Sarclisa, is approved in the US, in the EU, and in the UK, in combination with approved standard-of-care regimens for the treatment of patients with MM across all currently approved indications for Sarclisa IV in these countries. It is the first anticancer treatment to be administered through an OBI, and the only anti-CD38 monoclonal antibody available in MM to offer the flexibility of both SC OBI and manual injection administration. Sarclisa SC is approved in Japan for manual injection and a regulatory submission for the CirCLIQ on-body injector (OBI), based on the enFuse platform and submitted by Enable Injections, is under review.
At Sanofi, we are building on a long-standing commitment to oncology as we continue to chase the miracles of science to improve the lives of those living with cancer. We are committed to transforming cancer care by developing innovative, first and best-in-class immunological and targeted therapies for rare and difficult-to-treat cancers with high unmet need.
For more information on Sarclisa clinical studies, please visit www.clinicaltrials.gov.
About Sanofi
Sanofi is an R&D driven, AI-powered biopharma company committed to improving people’s lives and delivering compelling growth. We apply our deep understanding of the immune system to invent medicines and vaccines that treat and protect millions of people around the world, with an innovative pipeline that could benefit millions more. Our team is guided by one purpose: we chase the miracles of science to improve people’s lives; this inspires us to drive progress and deliver positive impact for our people and the communities we serve, by addressing the most urgent healthcare, environmental, and societal challenges of our time.
Sanofi is listed on EURONEXT: SAN and NASDAQ: SNY
Media Relations
Sandrine Guendoul | + 33 6 25 09 14 25 | sandrine.guendoul@sanofi.com
Evan Berland | +1 215 432 0234 | evan.berland@sanofi.com
Léo Le Bourhis | + 33 6 75 06 43 81 | leo.lebourhis@sanofi.com
Victor Rouault | +1 617 356 4751 | victor.rouault@sanofi.com
Timothy Gilbert | + 1 516 521 2929 | timothy.gilbert@sanofi.com
Léa Ubaldi | +33 6 30 19 66 46 | lea.ubaldi@sanofi.com
Ekaterina Pesheva | +1 410 926 6780 | ekaterina.pesheva@sanofi.com
Laura Romby | +33 6 74 16 74 29 | laura.romby@sanofi.com
Investor Relations
Thomas Kudsk Larsen | + 44 7545 513 693 | thomas.larsen@sanofi.com
Alizé Kaisserian | + 33 6 47 04 12 11 | alize.kaisserian@sanofi.com
Keita Browne | + 1 781 249 1766 | keita.browne@sanofi.com
Nathalie Pham | + 33 7 85 93 30 17 | nathalie.pham@sanofi.com
Nina Goworek | +1 908 569 7086 | nina.goworek@sanofi.com
Thibaud Châtelet | + 33 6 80 80 89 90 | thibaud.chatelet@sanofi.com
Yun Li | +33 6 84 00 90 72 | yun.li3@sanofi.com
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Sanofi forward-looking statements
This press release contains forward-looking statements within the meaning of applicable securities laws, including the Private Securities Litigation Reform Act of 1995, as amended. Forward-looking statements are statements that are not historical facts. These statements include projections and estimates and their underlying assumptions regarding the marketing and other potential of the product; regarding potential future events and revenues from the product. Words such as “expect,” “anticipate,” “believe,” “intend,” “estimate,” “plan,” “can,” “contemplate,” “could,” “is designed to,” “may,” “might,” “potential,” “objective,” “attempt,” “target,” “project,” “strategy,” “strive,” “desire,” “predict,” “forecast,” “ambition,” “guideline,” “seek,” “should,” “will,” “goal,” or the negative of these and similar expressions are intended to identify forward-looking statements. Although Sanofi’s management believes that the expectations reflected in such forward-looking statements are reasonable, investors are cautioned that forward-looking information and statements are subject to various risks and uncertainties, many of which are difficult to predict and generally beyond the control of Sanofi, that could cause actual results and developments to differ materially from those expressed in, or implied or projected by, the forward-looking information and statements. These risks, uncertainties and assumptions include among other things, unexpected regulatory actions or delays, or government regulation generally, that could affect the availability or commercial potential of the product, the fact that product may not be commercially successful; authorities’ decisions regarding whether and when to approve a product candidate; political pressure in the United States to mandate lower drug prices including “most favored nation” pricing for State Medicaid programs; the uncertainties inherent in research and development, including future clinical data and analysis of existing clinical data relating to the product, including post marketing, unexpected safety, quality or manufacturing issues; competition in general; risks associated with intellectual property and any related pending or future litigation and the ultimate outcome of such litigation, and volatile economic and market conditions, and the impact that global crises may have on us, our customers, suppliers, vendors, and other business partners, and the financial condition of any one of them, as well as on our employees and on the global economy as a whole. The risks and uncertainties also include the uncertainties discussed or identified in the public filings with the SEC and the French Markets Authority (AMF) made by Sanofi, including those listed under “Risk Factors” and “Cautionary Statement Regarding Forward-Looking Statements” in Sanofi’s annual report on Form 20-F for the year ended December 31, 2025 or contained in our periodic reports on Form 6-K. Other than as required by applicable law, Sanofi does not undertake any obligation to update or revise any forward-looking information or statements. In light of these risks, uncertainties and assumptions, you should not place undue reliance on any forward-looking statements contained herein.
All trademarks mentioned in this press release are the property of the Sanofi group with the exception of enFuse and CirCLIQ.
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