insomnia
"I feel odd on Belsomra.  I am very active and work out every day.  But my muscles now ache and it burns to keep my eyes open.  I am finally getting sleep, so that is positive.  But I feel like something is amiss.   I don't feel as if I need to actually take a nap during the day, but I feel like I am in a giant fog.  If that makes sense."