Study to Evaluate the Efficacy and Safety of Ponesimod (VSP-128) in Patients With Moderately to Severely Active Ulcerative Colitis

August 14, 2026 updated by: Vanda Pharmaceuticals

A Multicenter, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of Ponesimod in Patients With Moderately to Severely Active Ulcerative Colitis

A multicenter, randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of Ponesimod (VSP-128) in patients with moderately to severely active ulcerative colitis

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

150

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • United States
    • California
      • Chula Vista, California, United States, 91910
        • Recruiting
        • Vanda Investigational Site
    • Tennessee
      • Nashville, Tennessee, United States, 37211
        • Recruiting
        • Vanda Investigational Site

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Male and female subjects aged 18-75 years
  • Able to provide written informed consent
  • Diagnosis of ulcerative colitis for ≥90 days prior to screening
  • Three-component Mayo score of 5-9 with endoscopy subscore ≥2 and rectal bleeding subscore ≥1
  • History of inadequate response, loss of response, or intolerance to at least one approved UC therapy

Exclusion Criteria:

  • Severe or fulminant UC likely to require hospitalization or surgery
  • Diagnosis of Crohn's disease or other non-UC colitis
  • Prior exposure to S1P receptor modulators
  • Active or chronic infections
  • Clinically significant cardiovascular, hepatic, or other uncontrolled systemic disease
  • History of an allergic reaction or significant sensitivity to constituents of study drug

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: Placebo
Drug: Placebo
Matching placebo administered orally once daily during a 16-week double-blind period (2:1 randomization). A mock 14-day titration is used to maintain blinding. Participants may enter a 36-week open-label extension receiving Ponesimod.
Experimental: Ponesimod (VSP-128)
Drug: Ponesimod
Ponesimod administered orally once daily. Participants are randomized 2:1 to Ponesimod or placebo during a 16-week double-blind period. A 14-day titration is followed by a stable dose daily from Day 15 through end of treatment. Participants may enter a 36-week open-label extension receiving Ponesimod.
Other Names:
  • VSP-128

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Clinical Remission at Week 16
Time Frame: Week 16
Proportion of participants achieving clinical remission at Week 16.
Week 16

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Clinical Response at Week 16
Time Frame: Week 16
Proportion of participants achieving clinical response at Week 16.
Week 16
Endoscopic Improvement at Week 16
Time Frame: Week 16
Proportion of participants achieving endoscopic improvement at Week 16.
Week 16
Symptomatic Remission at Week 16
Time Frame: Week 16
Proportion of participants achieving symptomatic remission at Week 16.
Week 16
Change From Baseline in Mayo Score at Week 16
Time Frame: Baseline to Week 16.
Change from baseline in the three-component Mayo Score at Week 16. The overall score value ranges from 0 to 9, with higher scores indicating more severe ulcerative colitis disease activity.
Baseline to Week 16.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Vanda Pharmaceuticals

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

September 1, 2026

Primary Completion (Estimated)

April 1, 2029

Study Completion (Estimated)

August 1, 2029

Study Registration Dates

First Submitted

June 30, 2026

First Submitted That Met QC Criteria

June 30, 2026

First Posted (Actual)

July 7, 2026

Study Record Updates

Last Update Posted (Actual)

August 18, 2026

Last Update Submitted That Met QC Criteria

August 14, 2026

Last Verified

August 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • VP-VSP-128-3201

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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