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8 9 Over the last decade, a dietary intervention has emerged as an effective treatment option. 3 6 7 Otilonium bromide (OB), an L-type calcium channel blocking agent, improves abdominal pain and bloating in placebo-controlled trials, with significant response rates occurring after 4 or more weeks of treatment. In Europe, musculotropic spasmolytics are the most frequently prescribed pharmacological treatment for IBS and are considered as standard medical therapy. Multiple treatment options have been proposed for IBS, most of them yielding only limited therapeutic gain. 2 3 Patients with IBS have a decreased quality of life, and the disorder has a high socioeconomic impact. Besides abdominal pain, patients also report bloating, abdominal distension and flatulence. 1 2 Based on the dominant stool pattern, IBS can be subdivided into diarrhoea-predominant IBS (IBS-D), constipation-predominant IBS, mixed subtype IBS and unclassified IBS. IBS, defined by the Rome IV criteria as recurrent abdominal pain associated with a change in stool frequency or form and/or related to defecation, affects 4.1% of the adult population.
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