Ebastine for IBS: 4 Trial Checks

NICE¹ advises choosing irritable bowel syndrome (IBS) medicines around the predominant symptoms. Write down your main problem: pain, loose stools or urgency.¹

Who took part?

A phase 2 trial randomized 203 adults aged 18–65 without constipation-predominant IBS to 20 mg ebastine daily or placebo for 12 weeks; 202 were analyzed.²

Bring your diagnosis and bowel-pattern notes. Ask whether the eligibility rules match your diagnosis.

What counted?

Response required considerable or total symptom relief plus at least 30% lower weekly average pain than baseline, together for at least six of twelve weeks.²

Ask how your prescriber would measure benefit. Record the symptom and review date, so a discussion about pain does not become a judgment based only on bowel frequency.

What changed?

Estimated combined response was 12.0% versus 4.3%: difference 7.7 percentage points (95% confidence interval 0.2–15.2). Separate outcomes and the combined analysis among protocol followers were not statistically significant. Missing diaries required statistical estimation.²

A 2026 dose-comparison abstract describes an open-label study, not another blinded replication.³

Take the study citation to a gastroenterologist and ask what uncertainty would remain if you tried the medicine under supervision.

Before treatment

Spanish product information lists nasal allergies, chronic hives and allergic skin inflammation; it does not list IBS. Precautions include heart-rhythm risk, low potassium and interactions with ketoconazole or erythromycin. Severe liver disease limits dosing. It advises avoiding ebastine during pregnancy and breastfeeding as a precaution. Sleepiness or dizziness can occur.⁴

Check local availability and licensed uses with your clinician. Bring allergy tablets, sleep products and all other medicines to the review. Do not combine antihistamines or increase a dose on your own.

NICE¹ recommends agreeing follow-up according to symptom response; new warning signs require investigation or referral.¹

If loose stools are the main concern, our bile-acid diarrhea trial checks address a different diagnosis to discuss with your clinician.

Bloated by Dinner includes “The Gut-Side Options,” which explains why medicine discussions depend on IBS subtype. Bring your bowel-pattern log to that conversation.