I take it for
nerve pain from MS
, and it works pretty well. The max acccepted dosage is 3600 mg/day, which is a lot. Many MSers take that much, and I haven't heard of reactions like those described. Of course, everyone is different.
If you can't tolerate Neurontin (gabapentin), you might try Lyrica. That made me gain weight like mad, but once again, your mileage may vary.