insomnia
"My doctor suggested gabapentin for my leg cramps/restless legs and insomnia.  I was unable to sit for any period of time without my legs causing discomfort and would have very painful leg cramps.  I would find it hard to get to sleep and would wake up at 2 or 3 am every night. I have been taking gabapentin for a month and am very pleased....I have not experienced any of the severe symptoms that have been described by others."