Mark,Yes, I can identify. Been going through this IBS stuff for a while now and going through all of the tests to rule out the other possibilities. Anyway, I think that along with some other things caused the beginning of anxiety attack I've been having. My doc prescribed Xanax to help me sleep or for a really severe attack and then started me on Serzone (antianxiety drug). Anyway I think a lot of people on here have this problem and the meds seem to be helping me. Only caution I've seen is that Xanax can be very addictive........but okay if your careful with it. Good luck.Homemom