insomnia
"I have struggled with moderate insomnia for years (can't fall asleep, wake up 3 hours later unable to go back to sleep, etc).  Although some nights are better than others, it has always been a major influence in my life.  Lunesta worked well, allowing me to get about 6.5 to 7 hours, but it costs a FORTUNE.  Just started clonazepam about a month ago and WOW!  I only take it 3-4 nights a week to avoid dependency and my life is a lot better.  As a side note, I do not suffer from anxiety or depression, I just can't turn off my brain EVER."