Irritable Bowel Syndrome
ICD-10 K58 · ICD-11 DD91.0

IBS: When First-Line Treatment Has Not Improved Global Symptoms or Abdominal Pain

For patients with irritable bowel syndrome whose global symptoms and abdominal pain have not adequately responded to initial management, a structured second-line approach is the defined next step.

Previous Line — Goals Not Achieved

When first-line measures have not produced adequate improvement in global IBS symptoms and abdominal pain, escalation is indicated. First-line options include regular exercise; first-line dietary advice (as per the NICE IBS dietary advice sheet); soluble fibre such as ispaghula; probiotics (up to 12 weeks, discontinued if no improvement); antispasmodics; and peppermint oil — offered according to patient preference.

Second-Line Approach

A specific dietary therapy targeting certain categories of fermentable carbohydrates is considered as the second-line strategy. Delivery requires supervised input from a trained dietitian. The structured protocol defines the approach, the manner of introduction, and how food groups are systematically managed thereafter — details that are not captured here.

Treatment Goals

Improvement in global IBS symptoms and abdominal pain.

Instant Access to Structured Evidence-Based Regimens

References

DOI: 10.1136/gutjnl-2021-324598

A diet low in fermentable oligosaccharides, disaccharides and monosaccharides and polyols, as a second-line dietary therapy, is an effective treatment for global symptoms and abdominal pain in IBS, but its implementation should be supervised by a trained dietitian and fermentable oligosaccharides, disaccharides and monosaccharides and polyols should be reintroduced according to tolerance (recommendation: weak, quality of evidence very low).

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