Hi! I have been smoking for 5 years now and i do not think that it triggers my ibs. actually I would like to quit so much. I have tried so many times with different results but always come back. It halps to calm down for me. I even think that when I quit my ibs gets worse, but mabye it is connected with the general reaction for quiting nicotine, my body just got used to it and when it does not get some it gets crazy. well I am gonna try to quit, but not this week. i have got my final exam at university on next Tuesday, so I can not now, I am too nervous and excited. i know some people say smoking triggers their ibs , I just guess it is individual matter for everybody. take care! aga