A Study of Brenipatide (LY3537031) in Participants With Irritable Bowel Syndrome-Diarrhea (IBS-D)
A Phase 2, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of Brenipatide in the Treatment of Adult Participants With IBS-D
Eli Lilly and Company
531 participants
May 6, 2026
INTERVENTIONAL
Conditions
Summary
The purpose of this study is to evaluate how well brenipatide (LY3537031) is tolerated, what side effects may occur, and the safety and efficacy in participants with Irritable Bowel Syndrome-Diarrhea (IBS-D). The study drug will be administered subcutaneously (SC) (under the skin) when compared with placebo. The study will last approximately 35 weeks.
Eligibility
Inclusion Criteria5
- Meet Rome IV criteria for IBS-D, which includes having greater than 25% of bowel movements with Bristol Stool Form Scale (BSFS) Types 6 or 7 and <25% of bowel movements with BSFS Types 1 or 2
- Based on the daily eDiary collection during the screening period:
- Have average of worst abdominal pain score of ≥3.0 on a 0-to-10-point scale during the 14 consecutive days prior to randomization
- Have at least 4 days per week with a maximum BSFS ≥5 AND with at least 2 days of the 4 days per week with a maximum BSFS ≥6 during the 14 consecutive days prior to randomization
- Have had no major changes in diet in the 4 weeks prior to screening
Exclusion Criteria3
- Have a diagnosis of IBS with a subtype of constipation, mixed IBS, or unclassified IBS by the Rome IV criteria
- Have a history of inflammatory or immune-mediated gastrointestinal disorders
- Have a known clinically significant gastric emptying abnormality
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Interventions
Administered SC
Administered SC
Locations(88)
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NCT07545759