Excuse me, but do you feel anxious?
IBS can be dealt with through dietary changes
and modalities such as meditation
and the use of many natural remedies. Effexor for IBS is adding a problem, not trying to solve one. You say doctors tell you that you have anxiety, but when one has anxiety one knows it. If you don't feel anxious, don't take this drug. It's a difficult one, but besides that, it just doesn't sound like you need brain medication at all.