insomnia
"Tried this to replace zolpidem.  Horrible experience with single dose of 10 mg Belsomra.  No impact on helping me fall asleep within a reasonable time, then I felt I was in a horrible twilight zone, aware that I was neither truly awake nor asleep but unable to move my muscles, feeling very afraid and panicked.  I finally did manage to get myself fully awake and would NOT even try to go back to sleep, turned on the lights, kept myself busy to give the drug time to clear my system.  NEVER AGAIN."