I've been on Elavil (amitryptiline) since Dec. 2006. It was for neuropathic pain and besides taking the pain way down, and very quickly, it helped me sleep well for perhaps the first time in my adult life. I honestly didn't know I wasn't sleeping that well until I found out what a good nights sleep feels like.
It does make me slightly stupider but I can live with that. I am able to drive and carry on with everyday activities.
Hope it works as well for you.

phoebe