Your meds have most likely irrited your esophagus , acid will cause it to spasms , I have costo due to fibro and I also suffer from gerd and reflux despite prevacid , I have osteoperosis in my upper back also I get anxiety from the pain and the spasms , my muscles tighten up even more , my doctor feels that the tighness in my back is causing the stomach to malfunction, chicken and the egg theory when after a while one doesnt know what starts what , I have been researching this problem for years , if you google trigger point therapy you will find that it can all be related, having said that the only thing that helps with the spasms is ativan , it seems to relax the esophegus , at such time it feel like that I have trapped gas around my left scapula area that needs to be released , I still can't figure the mechanisim of it all all I know is that the few times I went to emereg because I could not breathe from the pain they gave me either a lidocauine cocktail and ativan or maalox and ativan , a short while later I could take a deep breath , it would be nice if I could take ativan every day as prevention of such attacks but I am afraid of addiction so I use 0.5 tablet once a day for maybe three days in a row to get over the worst of it , I was told that xanax is even more additive so I would be cautious about relying on that for more than a few weeks .In the past two weeks I have been on a diet of no wheat, dairy and fructose , this has helped my stomach issues considerably , less gas , acid and spasms , even my muscles are looser , hope this helps Micheline