Irritable bowel syndrome
(
IBS
) is a chronic, relapsing functional gastrointestinal (GI) disorder. 1-3 Patients who develop
IBS
report abdominal pain and altered bowel habits (Table 1) 1,4-6 with no identifiable cause. Patients may report a predominance of diarrhea (
IBS
-D) or constipation (
IBS
-C), but both may occur in an individual patient.