insomnia
"I have been on zolpidem for several years and only take about 2.5 mg of my 10 mg tablet. 
I tried Belsomra 10 mg (samples) Thursady night at 9 pm and I did not feel sleepy. The second night I took a 10 mg  table at around 9 PM I still do not feel sleepy so around 11 PM I took another 10 mg tablet and within 30 minutes  I felt weird and I knew I was going to have a rough night ahead of me and I was not going to get a good quality night sleep, which I did not!!!! The next morning which was Saturday (THANK GOD I didn't take 20mg  during the weekday) I felt horrible all day long and napped throughout the day up until 5 PM where I force myself to get up eat something drink a Mountain Dew just to feel alive again!!!  
This medication is horrible"