Carbamazepine
"First time when I took Tegretol, it worked immediately and the pain went away. The pain comes and go every year and the most importantly the pain was not bad last 4 years that I did not even take Tegretol.  This time the pain is unbearable so I'm on Tegretol. Even with the medication still feel the shock once in awhile. Definately feels better with Tegretol. The side effects, for me, sleepiness, weight gain, excitement with no reason."