This is true for me also. When I was on Elavil in four months I gained ~10 lbs. Was in a super deep sleep when I went to bed. I had a really hard time getting up in the morning. It helped with the spasms/pain which was great. But I craved sweets all the time and ate more at night .I switched to Lexapro, been on it for about 2 months. It's helped with the spasms/pain also and IBS-C.I just started Wellbutrin also to help w/ the sex drive. We'll see if it works.