Prozac for three months. However, I am a recovering alcoholic. Haven't had a drink in several years (so even Doctors dismissed alcohol as cause), but took Antibuse (which lists pn as a side effect). This is what is believed to be causative agent in pn. By the way, recovery is continuing daily...I am shocked at how sick I was, and how quickly the symptoms are resolving themselves (about three months). I hope to be back to normal at six months, but one never knows! Any recovering alcoholics out there...DON'T TAKE ANTIBUSE!