Residual sleepiness can persist despite well-controlled apnea; clinicians may assess for insufficient sleep

https://www.scribd.com/document/997941580/How-a-Sleep-Apnea-Oral-Appliance-Is-Fitted-Step-by-Step-Overview-207415

Residual sleepiness can persist despite well-controlled apnea; clinicians may assess for insufficient sleep, other disorders, or consider wakefulness agents.