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Comparing the Efficacy of Nitazoxanide Versus Rifaximin in Adult Patients With Irritable Bowel Syndrome Without Constipation

A Randomized Single-Blind Controlled Trial Comparing the Efficacy of Nitazoxanide Versus Rifaximin in Adult Patients With Irritable Bowel Syndrome Without Constipation

Status
Withdrawn
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05453916
Enrollment
0
Registered
2022-07-12
Start date
2022-07-01
Completion date
2024-12-31
Last updated
2025-07-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Irritable Bowel Syndrome With Diarrhea

Brief summary

This study aim to compare the efficacy of nitazoxanide in 2-week course of treatment with rifaximin in treating diarrhea associated with IBS. We also aim to study its effect over 10 weeks after treatment to evaluate its efficacy in eradicating symptoms of IBS in the long run.

Interventions

patients receiving treatment with Nitazoxanide 500 mg two times daily for 14 days

patients receiving treatment rifaximin at a dose of 550 mg three times daily for 14 days

Sponsors

Sadat City University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Subject)

Eligibility

Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
No

Inclusion criteria

* Patients 18 years of age or older. * Patients suffering from diarrhea-predominant IBS according to Rome III criteria. * Active symptoms for at least 2 weeks * Abdominal Pain Intensity: weekly average of worst daily (in past 24 hours) abdominal pain score of \> 3.0 on a 0-to-10-point scale and Stool Consistency: at least one stool with a consistency of Type 6 or Type 7 Bristol stool score (BSS) on at least 2 days per week * Report no restriction whatsoever on their diet.

Exclusion criteria

* Presence of liver disease, malignancy, severe malabsorption, bedridden, endocrinological disorders, or severe chronic obstructive pulmonary disease. * Patients who have undergone abdominal surgeries except for appendectomy and/or cholecystectomy and/or hysterectomy. * Patients who consumed any medications that may affect bowel function within the last 2 weeks such as antibiotics, probiotics, prebiotics, antispasmodics, antidiarrheals, narcotics, or any other medication that may alter bowel function * Patients on antidepressants or antipsychotics starting within the last six weeks before eligibility check.

Design outcomes

Primary

MeasureTime frameDescription
Proportion of Subjects Who Had Adequate Relief of Global IBS Symptoms for at Least 2 of the 4 Weeks During the Primary Evaluation Period6 weeksThe primary outcome measure is assessed during the 4-week period (ie, Weeks 3 through 6) immediately following 2 weeks of treatment with study drug

Secondary

MeasureTime frameDescription
Proportion of Subjects Who Had Adequate Relief of IBS-related Bloating for at Least 2 of the 4 Weeks During the Primary Evaluation Period (ie, Weeks 3 Through 6)6 weeksProportion of Subjects Who Had Adequate Relief of IBS-related Bloating for at Least 2 of the 4 Weeks During the Primary Evaluation Period (ie, Weeks 3 Through 6)

Other

MeasureTime frameDescription
Biological markers6 weeks - 12 weeksThe serological outcomes included the variation in interleukin-6 and anti-cdtB levels

Countries

Egypt

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026