insomnia
"It is for the person who cannot turn off their racing thoughts at night long enough to fall asleep or the person once asleep stays asleep.  You need to take it on an empty stomach or at least after merely a light non fatty meal for dinner.  If you eat mcdonalds the night of or something like that forget about it, you can take five of them and still not fall asleep.  So if prescribed it and falling asleep is your main issue or you use it only when you need sleep for a big event next day eat light that evening or just eat big lunch then take on empty or near empty stomach.  Only has about a two hour life and zero half life so take your butt to bed once it kicks in"