Business Wire

MERCK

Share
New Register-based Data on Use of Interferon Beta, Including Rebif®, in Women with Multiple Sclerosis Show No Effect on Pregnancy Outcomes

Merck, a leading science and technology company, today announced that new data on pregnancy outcomes at birth after exposure to interferon beta (IFN β), including Rebif® (sc/subcutaneous interferon beta-1a), will be presented at the 35th Congress of the European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS). Results showed no evidence that IFN β-exposure before and during pregnancy in women with multiple sclerosis (MS) affected infant birth weight for gestational age and head circumference. The results are based on data from Finnish and Swedish health registers collected between 1996-2014.

“Our priority is ensuring we address the needs of people living with MS,” said Dr. Maria Rivas, Chief Medical Officer at Merck. “When a woman is diagnosed with MS she may have questions on continuing treatment during pregnancy and how it could affect her unborn child. We are proud to collaborate with academia and health authorities to provide relevant safety information to physicians and patients.”

Among 666 IFN β-exposed and 1,330 unexposed live births, the prevalence of pregnancy outcomes were similar and not statistically different between the IFN β-exposed versus the unexposed patients. The prevalence of small for gestational age in the exposed cohort was 2.1% (95% CI 1.2-3.5) versus 2.0% (95% CI 1.3-2.9) for the unexposed, and large for gestational age was 0.8% (95% CI 0.2-1.7) for the exposed versus 0.8% (95% CI 0.4-1.5) for the unexposed. The prevalence of low birth weight was 3.9% (95% CI 2.6-5.7) among IFN β-exposed and 4.8% (95% CI 3.7-6.1) among the unexposed. Among 619 IFN β-exposed and 1,219 unexposed full-term births, the prevalence of low head circumference was 1.9% (95% CI 1.0-3.4) among the IFN β-exposed versus 1.1% (95% CI 0.6-1.8) among the unexposed.

These data points expand on safety data presented at recent congresses, which suggest exposure to IFN β does not increase risk of spontaneous abortions or affect other pregnancy outcomes, such as ectopic pregnancies or fetal malformations.

“Most women are diagnosed with MS at a time in their lives when they may be thinking about starting or extending a family, making their treatment decision more complex,” said Professor Kerstin Hellwig, Department of Neurology at St. Josef Hospital, Germany. “These data add to our wealth of knowledge to better understand the safety of interferon beta treatment during pregnancy.”

In the EU, the initiation of Rebif during pregnancy is currently contraindicated by the European Medicines Agency (EMA), see section 4.3 and 4.6 in the EU Summary of Product Characteristics (SMPC) for Rebif. Merck has submitted regulatory filings with different health authorities to include safety data from these interferon registries in the Rebif label, and these reviews are currently ongoing.

About Rebif®

Rebif® (interferon beta-1a) is a disease-modifying drug used to treat relapsing forms of multiple sclerosis (MS) and is similar to the interferon beta protein produced by the human body. The efficacy of Rebif® in chronic progressive MS has not been established. Interferon ß is thought to help reduce inflammation. The exact mechanism is unknown.

Rebif® , which was approved in Europe in 1998 and in the US in 2002, is registered in more than 90 countries worldwide. Rebif® has been proven to delay the progression of disability, reduce the frequency of relapses and reduce MRI lesion activity and area.

Rebif® can be administrated with the RebiSmart® electronic auto-injection device (not approved in the US), or with the RebiDose® single-use disposable pen, or the manual multidose injection pen RebiSlide™. Rebif® can also be administered with the autoinjector Rebiject II® or by manual injection using ready-to-use pre-filled syringes. These injection devices are not approved in all countries.

In January 2012, the European commission approved the extension of the indication of Rebif® in early multiple sclerosis. The extension of the indication of Rebif® has not been submitted in the United States. Rebif® should be used with caution in patients with a history of depression, liver disease, thyroid abnormalities and seizures. Most commonly reported side effects are flu-like symptoms, injection site disorders, elevation of liver enzymes and blood cell abnormalities. Patients, especially those with depression, seizure disorders, or liver problems, should discuss treatment with Rebif® with their doctors.

About Multiple Sclerosis

Multiple sclerosis (MS) is a chronic, inflammatory condition of the central nervous system and is the most common non-traumatic, disabling neurological disease in young adults. It is estimated that approximately 2.3 million people have MS worldwide. While symptoms can vary, the most common symptoms of MS include blurred vision, numbness or tingling in the limbs and problems with strength and coordination. The relapsing forms of MS are the most common.

Merck in Neurology and Immunology

Merck has a long-standing legacy in neurology and immunology, with significant R&D and commercial experience in multiple sclerosis (MS). The company`s current MS portfolio includes two products for the treatment of relapsing MS, with a robust pipeline focusing on discovering new therapies that have the potential to modulate key pathogenic mechanisms in MS. Merck aims to improve the lives of those living with MS, by addressing areas of unmet medical needs.

The company`s robust immunology pipeline focuses on discovering new therapies that have the potential to modulate key pathogenic mechanisms in chronic diseases such as MS, systemic lupus erythematosus (SLE) and forms of arthritis, including rheumatoid arthritis (RA) and osteoarthritis (OA).

All Merck Press Releases are distributed by e-mail at the same time they become available on the Merck Website. Please go to www.merckgroup.com/subscribe to register online, change your selection or discontinue this service.

About Merck

Merck, a leading science and technology company, operates across healthcare, life science and performance materials. Around 52,000 employees work to make a positive difference to millions of people’s lives every day by creating more joyful and sustainable ways to live. From advancing gene editing technologies and discovering unique ways to treat the most challenging diseases to enabling the intelligence of devices – the company is everywhere. In 2018, Merck generated sales of € 14.8 billion in 66 countries.

Scientific exploration and responsible entrepreneurship have been key to Merck’s technological and scientific advances. This is how Merck has thrived since its founding in 1668. The founding family remains the majority owner of the publicly listed company. Merck holds the global rights to the Merck name and brand. The only exceptions are the United States and Canada, where the business sectors of Merck operate as EMD Serono in healthcare, MilliporeSigma in life science, and EMD Performance Materials.

1 MS International Foundation. Who Gets MS? https://www.msif.org/about-ms/epidemiology-of-ms/ . Accessed 14 August 2019
2 MS International Foundation. What is MS? https://www.msif.org/about-ms/what-is-ms/ . Accessed 14 August 2019.

Link:

ClickThru

About Business Wire

Business Wire
Business Wire
101 California Street, 20th Floor
CA 94111 San Francisco

http://businesswire.com

Subscribe to releases from Business Wire

Subscribe to all the latest releases from Business Wire by registering your e-mail address below. You can unsubscribe at any time.

Latest releases from Business Wire

Allianz and Anthropic Forge Global Partnership to Advance Responsible AI in Insurance9.1.2026 10:00:00 CET | Press release

Anthropic’s safety-first AI meets Allianz's dedication to customer centricity, stakeholder trust, and regulatory excellenceThree focus areas of the partnership: workforce empowerment, operations automation through agentic AI, and regulatory compliance Allianz SE and Anthropic today announced a global partnership to accelerate the adoption of responsible Artificial Intelligence (AI) at Allianz. The collaboration centers on three transformative projects within Allianz Group designed to empower Allianz employees and accelerate operations, while setting new benchmarks for accuracy. “With this partnership, Allianz is taking a decisive step to address critical AI challenges in insurance. Anthropic’s focus on safety and transparency complements our strong dedication to customer excellence and stakeholder trust. Together, we are building solutions that prioritize what matters most to our customers while setting new standards for innovation and resilience,” said Oliver Bäte, CEO of Allianz SE.

MRM Health Secures FDA IND Clearance to Launch its Phase 2b Trial of MH002 in Mild-to-Moderate Ulcerative Colitis9.1.2026 07:00:00 CET | Press release

MH002 is currently the most advanced Live Biotherapeutic Product (LBP) based on a rationally-designed combination of disease specific bacteria (microbial consortia), for the treatment of inflammatory bowel diseases (IBD) STARFISH-UC Phase 2b trial is designed to confirm MH002’s early efficacy signals and favorable safety observed in Phase 2a studies MRM Health NV, a clinical-stage biopharmaceutical company pioneering microbiome-based therapeutics for inflammatory diseases and immune-oncology, today announced that the U.S. Food and Drug Administration (FDA) has granted clearance of its Investigational New Drug (IND) application for its lead program MH002. This enables the initiation of the STARFISH-UC Phase 2b clinical trial in patients with mild-to-moderate ulcerative colitis, marking a significant step forward in the development of next-generation therapies for inflammatory bowel diseases (IBD). About the STARFISH-UC Phase 2b Trial The STARFISH-UC trial is a randomized, double-blind,

FieldBee Vision wins Gold for Digital Technology Innovation at LAMMA 20269.1.2026 05:25:00 CET | Press release

FieldBee, the European leader in high-quality, easy-to-use and affordable precision agriculture technologies, proudly announces that FieldBee Vision has earned global recognition, becoming the Gold Winner in the Digital Technology Innovation of the Year category at the LAMMA Innovation Awards 2026. Lamma Show is the UK’s premier agricultural machinery, technology and equipment innovation. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260107606411/en/ FieldBee wins the LAMMA Innovation Award 2026 for Digital Technology Innovation of the Year for the FieldBee Vision (VisionSteer & VisionPro) system FieldBee Vision is part of the newly launched myFieldBee ecosystem, built to unify FieldBee’s precision farming tools and designed to connect navigation, autosteering, ISOBUS into one unified platform that supports planning, execution, monitoring and reporting. FieldBee Vision, the first modular retrofit agricultural vision system,

Survey Finds Over 70% of Chinese Doctors Recommend “AI Doctor Services” Like Ant Group’s AQ for Everyday Health Needs9.1.2026 04:31:00 CET | Press release

A recent survey by Life Times, a well-known Chinese public health media outlet, shows that AI doctor services are broadly supported by doctors in China. Among 500 physicians from the country’s top-tier (tertiary) hospitals, more than 70% said they would recommend AI doctor services to patients for everyday health questions and routine health management. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260108456917/en/ Ant Group’s AI-native health app AQ is designed to address common, everyday health concerns and support healthy habit formation. Ant Group’s AQ was the most frequently recommended platform in the survey. The latest figures show that, as of January 2026, the app had accumulated 30 million monthly active users and answers over 10 million health-related questions daily, making it China’s leading AI-native health app. AQ—known in Chinese as Ant A-Fu—is an AI-native health app launched by Ant Group in June 2025. Desig

OPPO Joins VVC Advance Patent Pool as a Licensee and Extends HEVC Advance License9.1.2026 03:00:00 CET | Press release

Access Advance LLC and Guangdong OPPO Mobile Telecommunications Corp., Ltd. (OPPO) today announced that OPPO has joined the VVC Advance Patent Pool as a Licensee and renewed its HEVC Advance License. OPPO, one of the world's largest smartphone manufacturers with operations in more than 70 countries, has been a valued participant in Access Advance's HEVC patent pool since 2020, and more recently joined the Advance Video Distribution Patent (VDP) Pool as a Licensor. These latest agreements mark a new milestone in a broad and deepening relationship between the two companies, with OPPO now participating across all three of Access Advance's video codec licensing programs. The VVC Advance Patent Pool licenses patents essential to the VVC/H.266 standard, which delivers remarkable improvement of video compression performance over HEVC, enabling higher-quality video experiences including 4K, 8K, and HDR content with faster downloads and lower latency. The pool currently includes over 4,500 worl

In our pressroom you can read all our latest releases, find our press contacts, images, documents and other relevant information about us.

Visit our pressroom
World GlobeA line styled icon from Orion Icon Library.HiddenA line styled icon from Orion Icon Library.Eye