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Apnimed’s sleep apnea pill meets main goal in late-stage study

By Thomson Reuters May 18, 2026 | 9:12 AM

May 18 (Reuters) – Privately held biotech firm Apnimed said on Monday its experimental pill for a sleep disorder met the main goal in a late-stage trial, ​potentially offering a convenient alternative to device-based treatments.

Here ‌are the details:

• The experimental treatment, AD109, is a once-daily pill taken at bedtime. It is being developed for people with obstructive sleep apnea — a condition in which the airway repeatedly collapses during sleep, lowering ‌oxygen ​levels and disrupting breathing.

• In the ⁠six-month study, AD109 met ⁠the main goal of reducing the number of breathing interruptions during sleep by 55.6% from baseline versus placebo.

• The drug also improved measures of oxygen levels during sleep, ​Apnimed said.

• The trial enrolled 646 adults in the U.S. and Canada who had refused or could not tolerate ⁠positive airway pressure devices, such ⁠as Continuous Positive Airway Pressure machines (CPAP), a common ​treatment for sleep apnea.

• ResMed and Philips make sleep apnea ​devices such as CPAP machines, which deliver a steady ‌flow of pressurized air to keep airways open during sleep and ensure proper breathing.

• Eli Lilly’s blockbuster drug Zepbound is also approved for the condition.

• Apnimed said 39.6% of patients ⁠taking AD109 had at least a 50% reduction in breathing interruptions while 22.3% achieved disease control.

• The drug was generally well ⁠tolerated, with dry ‌mouth, insomnia and nausea among the most ⁠common side effects. No serious side effects related ​to ‌AD109 were reported, the company said.

• Apnimed ​has submitted ⁠a marketing application for AD109 to the U.S. Food and Drug Administration. The company said it expects a potential FDA decision date in the first quarter of 2027, if the application is accepted for review.

(Reporting by Padmanabhan Ananthan in Bengaluru; Editing ​by Joyjeet Das)