migraine
"Had to start with 50 mgs per day. It made me sleep 36 hours when I tried taking 100 mgs. Also gave me bad breath and I could barely talk. Seemed to detox something in my throat. When the bad breath stopped I upped it to 100 mgs. More detox. Now I take 100 mgs four times per day. Doesn't make me sleepy, and the headache symptoms are much better. I am a person who avoids prescription drugs as much as possible and rarely go to the doctor. Gabapentin is the only drug I am taking. I am 61. It is really helping me with the debilitating migraine headache. Just be careful and don't take too much, or you will have to go to bed. And take it regularly. I think it's a good drug. 
Gave me weird dreams at first but I think that was a detox effect too."