Management of Irritable Bowel Syndrome Pain

First-Line Approach to Pain Management

The American Gastroenterological Association recommends regular exercise for all IBS patients, which should be advised at the initial visit 1, 2
Soluble fiber (ispaghula) is effective for global symptoms and abdominal pain, starting at 3-4 g/day and increasing gradually to avoid bloating, as recommended by the European Society for Neurogastroenterology and Motility 1
A low FODMAP diet can be used as second-line dietary therapy under dietitian supervision to reduce abdominal pain and bloating, although the evidence quality is very low, according to the British Dietetic Association 1, 2

Antispasmodics, such as mebeverine, are the initial drug choice for IBS pain, with mebeverine having direct inhibitory effects on intestinal smooth muscle and causing fewer systemic side effects, as recommended by the National Institute for Health and Care Excellence 1, 3
Peppermint oil is another effective first-line option for IBS pain, according to the American College of Gastroenterology 4
The evidence quality for antispasmodics is rated as very low, though they remain guideline-recommended first-line agents, as stated by the European Society of Gastrointestinal Motility 1

If pain persists after 3-6 weeks of antispasmodics, tricyclic antidepressants (TCAs) such as amitriptyline can be used as second-line therapy, starting at 10 mg once daily at bedtime and titrating to a maximum of 30-50 mg once daily, as recommended by the American College of Physicians 1, 2, 4
TCAs have moderate evidence quality, which is stronger than antispasmodics, according to the Cochrane Review 1
Selective serotonin reuptake inhibitors (SSRIs) can be considered if TCAs are not tolerated or if comorbid anxiety/depression is present, as suggested by the World Gastroenterology Organisation 4

For IBS with diarrhea (IBS-D), 5-HT3 receptor antagonists such as alosetron can be effective for both pain and diarrhea, although they carry a risk of ischemic colitis and severe constipation, as warned by the Food and Drug Administration 2
For IBS with constipation (IBS-C), linaclotide can be optimal as it has direct analgesic effects in addition to improving constipation, according to the European Medicines Agency 5
Bulking agents should be avoided for pain in IBS-C, as they help constipation but have mixed evidence for pain relief, as stated by the National Institute of Diabetes and Digestive and Kidney Diseases 5

Probiotics may be effective for global symptoms and abdominal pain, although no specific strain can be recommended, and should be trialed for 12 weeks, as suggested by the World Gastroenterology Organisation 1, 2
Cognitive-behavioral therapy and hypnotherapy are effective for reducing abdominal pain and should be considered early, not just after multiple drug failures, according to the American Psychological Association 4, 5