For decades, those who struggle to breathe through the night have faced a narrow set of remedies — machines, mouthguards, and the surgeon's hand. Now, a class of medications that has quietly reshaped how medicine thinks about weight is being examined for a second purpose: easing the airway, quieting the interrupted breath, and perhaps offering millions of people a gentler path through the night. The connection between excess weight and sleep apnea has always been understood; what is new is the possibility that a single intervention might address both at once.