American Board of Family Medicine (ABFM) Practice Exam 2025 - Free ABFM Practice Questions and Study Guide

Fiber is generally regarded as an effective treatment for Irritable Bowel Syndrome (IBS), especially for those suffering from constipation-predominant IBS. Adding fiber to the diet can help normalize bowel movements and alleviate constipation due to its ability to increase stool bulk and promote intestinal motility. Many patients with IBS benefit from a gradual increase in fiber intake, which can enhance gut health and improve overall symptoms.

While fiber can be beneficial, the effectiveness may vary among individuals. In some cases, excessive fiber may exacerbate symptoms such as bloating or gas, particularly with certain types of fiber. Therefore, while fiber is typically considered effective, its overall impact may not be universally positive for every patient.

Probiotics, antispasmodics, and antidepressants do have established roles in managing IBS. Probiotics can help restore a healthy gut microbiome. Antispasmodics can relieve cramping and discomfort. Antidepressants may address accompanying symptoms of anxiety and depression, further alleviating IBS symptoms.

Considering these aspects, fiber is not ineffective for treating IBS but rather may be less universally applicable or beneficial compared to the other treatments.