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Irritable bowel syndrome (IBS) is a gastrointestinal disease characterised by altered intestinal motility, affecting about 11% of the world's population. 1 The prevalence of IBS among different countries varies, such as 13.34% in Pakistan, 7.13% in Iran, 11.5% in China 11.5%, 20.4% in the United States, 21.65% in the United Kingdom and 14.04% in Japan. 2 This variation in the prevalence of one of the most common functional disorders is attributed to the wide clinical spectrum and the different criteria used for IBS diagnosis.

IBS patients usually present with a complex of symptoms which is dicult to treat. 3 These symptoms have negative impact on the patient's quality of life (QOL). The patients suffer from severe depression with a tendency towards suicide. While getting IBS treatments, patients sometimes undergo unnecessary surgeries and invasive measures. 4-6