Hi Vannie: I don't have much time to post this AM--just popping in to read a few posts, but if you type 'Elavil' in the search box above, there are quite a few threads.
I didn't take Elavil for fibro; it was for chronic diarrhea of an unknown cause (this was in the early '90s). I very rarely take it now, but when I do, I find I'm extremely sensitive to it. I have to go to sleep about an hour or so after I take it (50mg), and am tired the entire next day! So, I rarely take it anymore!
Hope you get some responses from those taking it for fibro. I do know it can cause weight gain--something few of us need.
Best wishes and hope this helps a bit.