Irritable bowel syndrome (IBS) is a functional gastrointestinal disorder, which is characterized by episodes of abdominal pain related to changes in bowel habits. 1 This condition has an estimated prevalence of approximately 11 per cent in North America, whereas its prevalence is 7.5 per cent in the Middle East. 2 IBS is among gastrointestinal disorders which causes substantial productivity loss in terms of high work absenteeism rate in addition to physician visits in the United States. 3 Furthermore, people with this disorder have a significantly lower quality of life. 4-6 Unfortunately, until now no definite treatment for this disorder has been found. Therefore, different modalities of treatment are currently advised for this condition. Some of these include lifestyle and diet modification, laxatives, antibiotics, probiotics and even faecal microbiota transplantation. 1,7 Antidepressant medications and