For decades, treatment for obstructive sleep apnea (OSA) has mostly centered around CPAP machines, oral appliances, surgery, and weight loss. But a new investigational medication from Apnimed is generating major interest because it may become one of the first effective oral medications for sleep apnea. The drug, called AD109 , has now completed large Phase 3 clinical trials with encouraging results. What Is AD109? AD109 is a once-nightly pill designed to help keep the airway open during sle…