“…Several studies have examined the effects of continuous positive airway pressure (CPAP) on ED in OSA patients, with mixed results [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. CPAP may improve erectile function by reducing nocturnal hypoxia, decreasing sympathetic activation, increasing nitric oxide levels, and restoring endothelial function [ 22 ].…”