Cited by 191Gastrointestinal motility and disordersInflammatory Bowel DiseaseInfant Health and Development

Efficacy of pharmacological therapies in patients with IBS with diarrhoea or mixed stool pattern: systematic review and network meta-analysis

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Black, Christopher J, Burr, Nicholas E, Camilleri, Michael, Earnest, David L, Quigley, Eamonn MM, Moayyedi, Paul, Houghton, Lesley A, Ford, Alexander C·2020·Gut

Abstract

Objective: Over half of patients with IBS have either diarrhoea (IBS-D) or a mixed stool pattern (IBS-M). The relative efficacy of licenced pharmacological therapies is unclear in the absence of head-to-head trials. We conducted a network meta-analysis to resolve this uncertainty. Design: We searched MEDLINE, Embase, Embase Classic, the Cochrane central register of controlled trials, and Clinicaltrials.gov through January 2019 to identify randomised controlled trials (RCTs) assessing the efficacy of licenced pharmacological therapies (alosetron, eluxadoline, ramosetron and rifaximin) in adults with IBS-D or IBS-M. Trials included in the analysis reported a dichotomous assessment of overall response to therapy, and data were pooled using a random effects model. Efficacy and safety of all pharmacological therapies were reported as a pooled relative risk with 95% CIs to summarise the effect of each comparison tested. Treatments were ranked according to their p score. Results: We identified 18 eligible RCTs (seven alosetron, five ramosetron, two rifaximin and four eluxadoline), containing 9844 patients. All were superior to placebo for the treatment of IBS-D or IBS-M at 12 weeks, according to the Food and Drug Administration (FDA)-recommended endpoint for trials in IBS. Alosetron 1 mg twice daily was ranked first for efficacy, based on the FDA-recommended composite endpoint of improvement in both abdominal pain and stool consistency, effect on global symptoms of IBS and effect on stool consistency. Ramosetron 2.5µg once daily was ranked first for effect on abdominal pain. Total numbers of adverse events were significantly greater with alosetron 1 mg twice daily and ramosetron 2.5µg once daily, compared with placebo. Rifaximin 550 mg three times daily ranked first for safety. Constipation was significantly more common with all drugs, except rifaximin 550 mg three times daily. Conclusion: In a network meta-analysis of RCTs of pharmacological therapies for IBS-D and IBS-M, we found all drugs to be superior to placebo, but alosetron and ramosetron appeared to be the most effective.

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Crossref · 10.1136/gutjnl-2018-318160

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  • A network meta-analysis comparing the relative efficacy of all these licensed therapies for IBS-D demonstrated that alosetron 1 mg two times per day ranked first for the FDA composite end point for IBS-D and global symptoms, with ramosetron 2.5 μg once a day second.

    “A network meta-analysis comparing the relative efficacy of all these licensed therapies for IBS-D, across various end points, 153 demonstrated that alosetron 1 mg two times per day ranked first for the FDA composite end point for IBS-D and global symptoms (online supplemental figures 10 and 11), with ramosetron 2.5 μg once a day second.”

    From British Society of Gastroenterology guidelines on the management of irritable bowel syndrome (2021) · cites this paper as [153]

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  • In a meta-analysis of 2 RCTs, which recruited 1260 patients, rifaximin 550 mg three times a day for 14 days was more efficacious than placebo for the FDA composite end point for IBS-D (RR 0.92; 95% CI 0.86 to 0.98) and for stool consistency alone, but not for global symptoms or abdominal pain.

    “In a meta-analysis of 2 RCTs, 153 which recruited 1260 patients, rifaximin 550 mg three times a day for 14 days was more efficacious than placebo for the FDA composite end point for IBS-D (RR 0.92; 95% CI 0.86 to 0.98) (online supplemental figure 10) and for stool consistency alone (online supplemental figure 12), but not for global symptoms or abdominal pain (online supple- mental figures 11 and”

    From British Society of Gastroenterology guidelines on the management of irritable bowel syndrome (2021) · cites this paper as [153]

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  • For abdominal pain, ramosetron 2.5μg once a day and ramosetron 5 μg once a day were ranked first and second, respectively.

    “For, abdominal pain, ramosetron 2.5μg once a day and ramosetron 5 μg once a day were ranked first and second, respectively (online supplemental figure 13).”

    From British Society of Gastroenterology guidelines on the management of irritable bowel syndrome (2021) · cites this paper as [153]

    The ‘Failure to achieve an abdominal pain response’ section (page unavailable) ranks ramosetron 2.5 µg once daily first and reports that ramosetron 5 µg once daily was more effective than placebo. It does not state that the 5 µg dose ranked second for abdominal pain. (LLM, conf=0.84)

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  • Adverse events included constipation, nausea and headache, and adverse events leading to drop out were significantly higher with active drug than placebo.

    “Adverse events included constipation, nausea and headache, and adverse events leading to drop out were significantly higher with active drug than placebo.”

    From British Society of Gastroenterology guidelines on the management of irritable bowel syndrome (2021) · cites this paper as [153]

    The Outcome assessment section (page unavailable) lists constipation, nausea and headache among the individual adverse events assessed. The Safety section (page unavailable) reports significantly more adverse-event-related dropouts than placebo for both studied doses of eluxadoline and for alosetron 1 mg twice daily, but not for active drugs generally. (LLM, conf=0.88)

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  • Adverse events included constipation, nausea and headache; patients assigned to both drugs were more likely to report adverse events than with placebo.

    “Adverse events included constipation, nausea and headache; patients assigned to both drugs were more likely to report adverse events than with placebo.”

    From British Society of Gastroenterology guidelines on the management of irritable bowel syndrome (2021) · cites this paper as [153]

    The Safety section (page unavailable) reports significantly more overall adverse events with alosetron 1 mg twice daily and ramosetron 2.5 µg once daily than with placebo. The Discussion identifies constipation as an adverse event, but our copy does not identify nausea or headache among the reported events. (LLM, conf=0.86)

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Research works printed but not linked: 1

  1. [58]58. Drossman Da, thompson Wg, talley nJ. identification of sub-groups of functional gastrointestinal disorders. Gastroenterology Intl 1990;3:159-72.

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Authors
Black, C. J., Burr, N. E., Camilleri, M., Earnest, D. L., Quigley, E. M., Moayyedi, P., Houghton, L. A., & Ford, A. C.
Affiliations
  • University of Leeds (GB)
  • Mayo Clinic (US)
  • University of Arizona (US)
  • Houston Methodist (US)
  • McMaster University (CA)
Corresponding author
Ford, Alexander C
Venue
Gut
Publisher
BMJ
Published
2019-04-17
Volume
69
Issue
1
Pages
74-82
ISSN
  • 0017-5749 (ISSN-L)
  • 1468-3288
OpenAlex
W2939585492
Cited by
191
References
64
Citations by year
2026: 24 · 2025: 17 · 2024: 20 · 2023: 19 · 2022: 41 · 2021: 39 · 2020: 23 · 2019: 6
FWCI
4.93
Type
journal article
Language
en
Open access
Locations
  • Gut (publishedVersion)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • HighWire Press Open Archive (submittedVersion)
Topics
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Inflammatory Bowel Disease
  • Health Sciences › Health Professions › Pharmacy › Infant Health and Development
Keywords
irritable bowel syndrome, pharmacotherapy, alosetron, ramosetron, eluxadoline, rifaximin, drug efficacy, drug safety, adverse events, abdominal pain, stool consistency, constipation
MeSH terms
Diarrhea, Gastrointestinal Agents, Humans, Abdominal Pain, Randomized Controlled Trials as Topic, Treatment Outcome, Treatment Failure, Endpoint Determination, Irritable Bowel Syndrome, Pain Management

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