Ebastine for adults with diarrhea-predominant IBS

Effect of Ebastine in Patients With Diarrhea Predominant Irritable Bowel Syndrome

PHASE2; PHASE3 · Dhaka Medical College · NCT07114055

This will test whether taking ebastine at night helps adults with diarrhea-predominant IBS reduce their symptoms compared with a placebo.

Quick facts

PhasePHASE2; PHASE3
Study typeInterventional
Enrollment60 (estimated)
Ages18 Years and up
SexAll
SponsorDhaka Medical College (other)
Locations1 site (Dhaka)
Trial IDNCT07114055 on ClinicalTrials.gov

What this trial studies

This Phase 2/3 interventional trial compares nightly ebastine 20 mg to a matching placebo in adults who meet Rome IV criteria for diarrhea-predominant IBS. Participants take study medication once daily for 8 weeks alongside lifestyle modifications and are evaluated at baseline, week 4, and week 8 using the IBS Symptom Severity Score (IBS-SSS). Patient-reported adverse events are recorded throughout the treatment period to monitor safety. The study is conducted at Dhaka Medical College and enrolls adults aged 18 and over without alarm features or major comorbid conditions.

Who should consider this trial

Good fit: Adults aged 18 and older who meet Rome IV criteria for diarrhea-predominant IBS, are not pregnant or lactating, and do not have alarm signs or major gastrointestinal or uncontrolled endocrine diseases.

Not a fit: People with alarm features, prior major GI surgery, uncontrolled diabetes or thyroid disease, pregnant or breastfeeding women, vehicle/mechanical/aerial operators, or those with substance abuse are excluded and would not be expected to benefit from this tested approach.

Why it matters

Potential benefit: If successful, ebastine could provide a new medication option to reduce diarrhea and abdominal symptoms in people with IBS-D.

How similar studies have performed: Using an antihistamine like ebastine for IBS-D is a relatively novel approach with limited prior clinical evidence supporting benefit.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion criteria

* Age 18 and above
* Patients who meet the Rome IV criteria for IBS-D.

Exclusion criteria

* Presence of alarm features: anemia, weight loss, per rectal bleeding, nocturnal frequency, and family history of colonic cancer
* History of major gastrointestinal surgery
* Medical disease that affect the digestive system, such as uncontrolled diabetes, hyperthyroidism, hypothyroidism
* Pregnant and lactating women
* Vehicle drivers, mechanical operators and aerial operators
* Drug abuse or alcohol abuse

Where this trial is running

Dhaka

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Irritable Bowel Syndrome - Diarrhoea, Ebastine

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.