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.