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Clinical trial finds epilepsy drug reduces sleep apnea symptoms

Mar 13, 2026, 5:25 PM10
(Update: Mar 13, 2026, 5:25 PM)
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Clinical trial finds epilepsy drug reduces sleep apnea symptoms

  • A clinical trial found sulthiame, an epilepsy drug, effectively reduces breathing interruptions in sleep apnea patients.
  • The study showed that higher doses led to significant reductions in apnea measures and better overnight oxygen levels.
  • These findings suggest that sulthiame may offer a pharmacological treatment option for obstructive sleep apnea.
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Story

A recent phase 2 clinical trial conducted by the University of Gothenburg in Sweden has indicated that sulthiame, a drug primarily used for treating childhood epilepsy, may significantly alleviate symptoms of obstructive sleep apnea (OSA). This study involved 298 adults diagnosed with moderate to severe OSA and took place across four European countries, emphasizing the potential for this existing medication to influence treatment strategies for this common sleep disorder. The research found notable improvements in nighttime breathing interruptions, which saw reductions of up to 47 percent in participants assigned higher doses of the drug compared to those on a placebo. The study sheds light on the prevalence of sleep apnea, which affects nearly 30 million adults in the U.S., as reported by the American Academy of Sleep Medicine. Typically, sleep apnea causes patients to experience repeated cessation and resumption of breathing during sleep, most commonly due to obstruction of the airway or improper signaling from the brain regarding the muscles responsible for breathing. Left untreated, this condition poses a higher risk for various health complications. While sulthiame has been used for many years in the treatment of epilepsy, it remains investigational and is not yet approved in the U.S. or Canada for sleep apnea applications. Importantly, researchers noted that most side effects in the clinical trial were mild and temporary, highlighting a favorable safety profile for the drug. Additionally, some subjects in previous studies reported improvements in daytime alertness, extending the potential benefits of sulthiame beyond nighttime symptoms. Following these promising results, researchers are looking to launch larger and more comprehensive phase 3 studies to evaluate the long-term effectiveness, safety, and which demographics might benefit the most from sulthiame as a treatment for sleep apnea. The significance of this emerging treatment could lead to a paradigm shift in how sleep apnea is managed, potentially improving the quality of life for millions.

Context

Obstructive sleep apnea (OSA) is a common and serious sleep disorder characterized by repeated interruptions in breathing during sleep. These interruptions, or apneas, occur when the muscles in the throat relax excessively, leading to a temporary blockage of the airway. This condition can result in fragmented sleep and reduced oxygen levels in the blood, contributing to a variety of health issues. Common symptoms of OSA include loud snoring, choking or gasping during sleep, excessive daytime sleepiness, and difficulty concentrating. Because these symptoms often go unnoticed by the affected individuals, OSA frequently remains undiagnosed, which can lead to significant consequences for overall health and well-being. The prevalence of obstructive sleep apnea is notably high, affecting millions of people worldwide. It is particularly common in individuals who are overweight, as excess body weight can contribute to the narrowing of the airway. Other risk factors include age, gender (men are more likely to develop OSA), and anatomical features such as a thick neck, enlarged tonsils, or a recessed jaw. OSA can also occur in individuals who have a family history of sleep apnea or certain medical conditions, including hypertension, diabetes, and heart disease. The condition not only affects the quality of sleep but also has implications for cardiovascular health, increases the risk of accidents due to daytime fatigue, and can contribute to metabolic disorders. Diagnosing obstructive sleep apnea typically involves a combination of medical history evaluation, physical examination, and sleep studies. Home-based sleep apnea testing is available, but in some cases, a polysomnography, performed in a sleep lab, may be necessary for accurate diagnosis. During these tests, various body functions are monitored while the patient sleeps, including brain activity, heart rate, oxygen levels, and airflow. Based on the severity of OSA, healthcare providers may recommend lifestyle changes, continuous positive airway pressure (CPAP) therapy, oral appliances, or surgical options. Lifestyle modifications often include weight loss, avoiding alcohol and sedatives, and sleeping in a different position to prevent airway obstruction. The management of obstructive sleep apnea is crucial not only for improving sleep quality but also for enhancing overall health. When left untreated, OSA can lead to various complications, such as cardiovascular disease, stroke, type 2 diabetes, and metabolic syndrome. Those with OSA may also experience complications from surgery or medications, especially in the context of anesthesia. Therefore, understanding the impacts and treatment options for obstructive sleep apnea is vital for individuals who are experiencing symptoms and for healthcare professionals working to promote healthier sleep practices. Early recognition and effective management of this condition can significantly improve an individual's quality of life and reduce the risk of serious health problems.

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