insomnia
"I have idiopathic insomnia as well as sleep apnea. Although the CPAP helps the apnea, I still was waking up every hour or two during the night, never getting a restful night sleep. Then I was prescribed gabapentin for nerve pain and discovered that it also works for my sleep. I wake rested and have much more energy. Apparently GABA helps increase slow wave sleep so I am dreaming more also."