WHIPPANY, N.J.--(BUSINESS WIRE)--Nov 9, 2026--
Bayer
Bayer’s SUNHARBO ® (asundexian), 50 mg tablets, the First and Only Factor XIa Inhibitor, Approved by the U.S. FDA to Reduce the Risk of Stroke in Adults With Recent Non-Cardioembolic Ischemic Stroke or High-Risk Transient Ischemic Attack, in Combination With Antiplatelet Therapy
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Bayer announced today that the U.S. Food and Drug Administration (FDA) has approved SUNHARBO ® (asundexian), 50 mg tablets, a first-in-class, once daily, Factor XIa inhibitor indicated in combination with antiplatelet therapy to reduce the risk of stroke in adults with recent non-cardioembolic ischemic stroke (NIHSS ≤15) or high-risk transient ischemic attack (TIA). Reducing the risk of a stroke after an initial event is often referred to as secondary stroke prevention. The recommended dosage of SUNHARBO is 50 mg once daily. SUNHARBO is the first approved medicine in the U.S. to target Factor XIa, representing a new approach to reducing the risk of ischemic stroke. 1
SUNHARBO is an inhibitor of Factor XIa. Factor XIa inhibition reduces amplification of thrombin generation. In preclinical models, Factor XIa inhibition targets more pathological clotting (thrombosis) with lesser impact on normal clotting response (hemostasis). 1
BAYER EXECUTIVE COMMENTARY
"For decades, Bayer has worked to advance care in cardiovascular and cerebrovascular diseases. Today’s approval offers stroke patients a novel treatment option to reduce their risk of stroke, building on our company’s legacy to develop first-in-class products that address significant health challenges,” said Nelson Ambrogio, President of Bayer U.S. Pharmaceuticals. “We are proud to bring the first approved Factor XIa inhibitor to market in the U.S. for secondary stroke prevention.”
WHY SECONDARY STROKE RISK REDUCTION MATTERS
EXPERT COMMENTARY
“For those who survive a stroke, the risk of another potentially devastating event is highest in the days and weeks after the initial event, and that risk persists over time,” said Ashkan Shoamanesh, M.D., Co-principal Investigator of the OCEANIC-STROKE clinical study and Senior Scientist at Population Health Research Institute (PHRI), a joint institute of Hamilton Health Sciences and McMaster University (Ontario, Canada). “I believe SUNHARBO introduces an important new addition to post-stroke care that can be used to help patients reduce the risk of a secondary stroke.”
OCEANIC-STROKE CLINICAL TRIAL RESULTS
SUNHARBO was approved based on results from the pivotal Phase 3 OCEANIC-STROKE study where SUNHARBO was studied versus placebo in adults after a non-cardioembolic ischemic stroke (NIHSS ≤15) or high-risk transient ischemic attack, both in combination with antiplatelet therapy. The study randomized 12,327 patients to receive either SUNHARBO (N=6,162), or placebo (N=6,165). The mean age at enrollment was 68 years. The primary endpoint was time to first occurrence of ischemic stroke. 1
This approval marks the first for a Factor XIa inhibitor in the U.S. Bayer anticipates that SUNHARBO will begin shipping in mid-to-late November and is expected to become available for hospitals and pharmacies to order across the U.S. shortly thereafter.
Bayer is committed to making SUNHARBO accessible. If a patient cannot afford their prescription, Bayer may be able to help. Eligible patients may receive their Bayer prescription medicine at no cost through the Bayer U.S. Patient Assistance Foundation. For more information, please visit www.patientassistance.bayer.us or call to speak with a member of Bayer’s team at 1-866-2BUSPAF (228-7723).
As of November 2026, SUNHARBO is currently under review by the European Medicines Agency (EMA) and Japan's Ministry of Health, Labour and Welfare (MHLW). SUNHARBO was approved by China's National Medical Products Administration (NMPA) on October 26, 2026.
AboutSUNHARBO ® (asundexian)
SUNHARBO is a once-daily, first-in-class, oral Factor XIa inhibitor approved by the U.S. FDA and indicated in combination with antiplatelet therapy to reduce the risk of stroke in adults with recent non-cardioembolic ischemic stroke (NIHSS≤15) or high-risk transient ischemic attack (TIA). SUNHARBO is the first approved Factor XIa inhibitor in the U.S. and represents the first medicine in a new class designed to target Factor XIa. SUNHARBO is an inhibitor of Factor XIa. Factor XIa inhibition reduces amplification of thrombin generation. In preclinical models, Factor XIa inhibition targets more pathological clotting (thrombosis) with lesser impact on normal clotting response (hemostasis). 1
SUNHARBO was approved based on results from the pivotal Phase 3 OCEANIC-STROKE study where SUNHARBO significantly reduced ischemic stroke in patients after a recent non-cardioembolic ischemic stroke or high-risk transient ischemic attack compared to placebo (6.2% vs. 8.4%; HR 0.74; 95% CI, 0.65–0.84; P<0.0001), both in combination with antiplatelet therapy. 1
For additional information about SUNHARBO, healthcare professionals may visit SUNHARBOhcp.com. Please see the full prescribing information.
INDICATION
SUNHARBO ® is indicated in combination with antiplatelet therapy to reduce the risk of stroke in adults with recent non-cardioembolic ischemic stroke (NIH Stroke Scale ≤ 15) or high-risk transient ischemic attack (TIA).
IMPORTANT SAFETY INFORMATION
CONTRAINDICATIONS and WARNINGS & PRECAUTIONS
None.
ADVERSE REACTIONS
Bleeding
Diarrhea
Hepatic Enzyme Increased
DRUG INTERACTIONS
USE IN SPECIFIC POPULATIONS
Pregnancy
Lactation
Hepatic Impairment
For additional important risk and use information, please see the full Prescribing Information.
You are encouraged to report side effects or quality complaints of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088.
About Bayer’s Stroke Franchise
Bayer is a leader in cardiovascular (CV) and cerebrovascular diseases, with a longstanding legacy of scientific innovation in the prevention and treatment of thrombotic conditions. Building on this heritage, Bayer is advancing innovative approaches to help address unmet needs in stroke, with a focus on the area of secondary stroke prevention and research into new pathways, including Factor XIa. Bayer aims to help shape the future of stroke care with products strategically positioned to help address critical unmet needs and drive significant long-term value. Bayer is working alongside the stroke community to better understand unmet needs and support patients and care partners across the stroke journey.
About Bayer
Bayer is a global enterprise with core competencies in the life science fields of health care and nutrition. In line with its mission, “Health for all, Hunger for none,” the company’s products and services are designed to support efforts to master major challenges presented by a growing and aging global population and create value through innovation and growth. The Bayer brand stands for trust, reliability and quality throughout the world. In fiscal 2025, the Group employed around 88,000 people and had sales of 45.6 billion euros. R&D expenses amounted to 5.8 billion euros.
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Forward-Looking Statements
This release may contain forward-looking statements based on current assumptions and forecasts made by Bayer management. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in Bayer’s public reports which are available on the Bayer website at www.bayer.com. The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.
References:
Bayer’s SUNHARBO® (asundexian), 50 mg tablets, the First and Only Factor XIa Inhibitor, Approved by the U.S. FDA to Reduce the Risk of Stroke in Adults With Recent Non-Cardioembolic Ischemic Stroke or High-Risk Transient Ischemic Attack...
Bayer’s SUNHARBO® (asundexian), 50 mg tablets, the First and Only Factor XIa Inhibitor, Approved by the U.S. FDA to Reduce the Risk of Stroke in Adults With Recent Non-Cardioembolic Ischemic Stroke or High-Risk Transient Ischemic Attack...
