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New pill aims to bring back color to vitiligo skin

NCT ID NCT07667569

Disease control Sponsor: Idorsia Pharmaceuticals Ltd. Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This phase 2a trial tests whether a daily pill called ACT-777991 can help return color to the face of adults with non-segmental vitiligo. About 30 participants will take either the drug or a placebo for 24 weeks. Researchers will measure changes in skin color using a standard scoring system.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
ACT-777991 (a daily tablet)
What this could lead to
If it works, this could point toward a new treatment option to restore skin color in people with vitiligo.
What could go wrong
This is an early proof-of-concept trial with only 30 participants, so results may not apply to everyone. It is also compared to a placebo, so the real benefit is still uncertain.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 30 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jun 2026

An estimate. Start dates often move.

Expected to finish

Jul 2027

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Clinical diagnosis of either active or stable non segmental vitiligo for at least 3 months prior to Screening and meet all the following criteria: * F-VASI score ≥ 0.3 based on BICR at Screening. * T-VASI score ≥ 5 based on investigator assessment at Screening and Randomization. * Total body surface area (BSA) involvement, including the face, ≤ 50% based on investigator assessment at Screening and Randomization. * Participants must agree not to use therapeutic agents and procedures to treat vitiligo from Screening until Participant Last Visit. Exclusion Criteria: * Clinical diagnosis of other forms of vitiligo (e.g., segmental) or other hypo- or depigmentation disorders (e.g., piebaldism, leukoderma, Vogt-Koyanagi-Harada disease, malignancy-induced hypopigmentation). * Any autoimmune disease, except adequately treated thyroid disease. * History of systemic immunotherapy treatment, including JAK inhibitors, for any inflammatory disease in the 12 months prior to Randomization. * History of topical JAK inhibitors for any inflammatory disease in the 6 weeks prior to Screening. * Use of laser or light-based treatment (phototherapy), including tanning beds, in the 8 weeks prior to Screening. * eGFR \< 90 mL/min/1.73 m2, defined by the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) creatinine equation, at Screening.

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Conditions

The condition(s) this trial relates to.

vitiligo

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Non-segmental vitiligo

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

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