bipolar disorde
"I started the once daily Gabapentin last week and am now on 1200 mg/day.  I was taking it for back pain and later realized it is also used for bipolar and anxiety problems, which I also suffer from.  I don't feel much of a difference mentally, but I feel drugged during the day.  It feels like I took a sleeping pill and am walking around doing my work trying to keep my eyes open.  I am not sure whether this is connected to the drug or it just happened for another reason.  In fact, this drugged feeling happened to me twice before I took the drug, but now it happens everyday.  Not sure what's going on."