Gabapentin
"This medication completely stopped all of the pain I experienced, to the point that I had to do a body check each night to see if I had hurt myself during the day.  However, within 2 months of starting this medication (a VERY low dose), I was suicidal, and had to be taken off of it at 2 1/2 months.  If it weren't for the side effects, I would give this medication a 10.  Due to the side effects (horrendous, in my opinion), I've given it a 1."