Everything I read on the subject says no. It is never listed on any list describing IBS. Yet many, many of us are having this symptom on a nearly daily basis. My GI doc says yes, it is a secondary symptom of IBS. Currently I am having normal BM's every day and having very little intestinal cramping, if any. Yet, this nausea is the lingering symptom I can NOT seem to get rid of. What gives?