functional dyspepsia, which is defined as chronic upper, centered abdominal discomfort or pain excluding the predominant symptom,
heartburn. Associated symptoms are early satiety, nausea, vomiting,
abdominal distension, bloating,
and anorexia.
Of course, there could be a number of other issues related to "IBS" which cannot be addressed by medications, but I don't know a lot about that so, I couldn't tell you.