Background And Aims: Irritable bowel syndrome (IBS) is one of the most frequent functional gastrointestinal disorders, having its subtypes related to the predominant bowel pattern: IBS with diarrhea (IBS-D), IBS with constipation (IBS-C), mixed IBS (IBS-M) or alternating IBS (IBS-A). Some patients alternate between subtypes (IBS-A). We looked for the prevalence of alternation between subtypes in patients with IBS. We also analyzed changes in pharmacological therapy specifically addressed to IBS.
Methods: We performed a retrospective observational study that included 60 patients diagnosed with IBS according to Rome III criteria. Patients were asked using a detailed structured interview about their stool form changes regarding previous six months. Alternators were defined as patients that changed IBS subtype over time (previous six months).
Results: Out of the 60 patients diagnosed with IBS, 18 patients (30%) were alternators. Of these, 8 patients (44%) changed twice the subtype. Two patients (66.66%) of the IBS-M subgroup shifted between subtypes. Eight patients (44.44%) changed medication over the six months. Four patients (22.2%) of the alternators were on double association of therapy (antispasmodics) addressed to IBS. Four patients (22.22%) discontinued medication.
Conclusions: Patients with IBS often change between subtypes even within six months. Alternators in our pilot study represented 30% of IBS patients. IBS-M seems to be the least stable phenotype. The rarest change is the shift between IBS-C and IBS-D. Alternators also often change their pharmacological treatment (antispasmodics).
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4849379 | PMC |
| http://dx.doi.org/10.15386/cjmed-589 | DOI Listing |
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