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Promising psoriasis drug trial halted early – what now?

NCT ID NCT05366855

Disease control Sponsor: Vanda Pharmaceuticals 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
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 study tested a drug called imsidolimab for adults with generalized pustular psoriasis (GPP), a rare and painful skin condition. The trial aimed to see if the drug is safe and works over the long term. However, the study was terminated early, so we have less information than hoped.

What this could mean

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

Active substance
imsidolimab (ANB019)
What this could lead to
If successful, this could point toward a long-term treatment option for people with generalized pustular psoriasis, a rare and severe skin condition.
What could go wrong
The trial was terminated early, so results are limited. It is unclear if imsidolimab is safe and effective over the long term.

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 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

42 people

The number who actually took part.

Started

Apr 2022

Finished

Jul 2024

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 years and older

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: * Subject participated in the preceding placebo-controlled Phase 3 study ANB019-301 and completed at least the Week 1 visit of the ANB019-301 study without the use of rescue/prohibited medication for GPP * Subject must be a candidate for prolonged GPP treatment according to the Investigator's judgment Exclusion Criteria: * Use of prohibited medications between the last visit of the ANB019-301 study and the Day 1 visit of the ANB019-302 study

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Conditions

The condition(s) this trial relates to.

generalized pustular psoriasis psoriasis

As listed by the trial registrant

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

Generalized pustular psoriasis

Contacts and locations

Locations

  • Site 10-101

    Ann Arbor, Michigan, 48109, United States

  • Site 10-102

    Springville, Utah, 84663, United States

  • Site 10-105

    Louisville, Kentucky, 40217, United States

  • Site 10-108

    Dallas, Texas, 75231, United States

  • Site 10-109

    Largo, Florida, 33770, United States

  • Site 16-101

    Paris, 75010, France

  • Site 16-102

    Nantes, 44093, France

  • Site 17-102

    Bad Bentheim, 48455, Germany

  • Site 17-103

    Hanau, 63450, Germany

  • Site 17-104

    Bonn, 53127, Germany

  • Site 17-105

    Würzburg, 97080, Germany

  • Site 24-101

    Barcelona, 08036, Spain

  • Site 24-102

    Madrid, 28040, Spain

  • Site 24-103

    Madrid, 28041, Spain

  • Site 24-104

    Las Palmas de Gran Canaria, 35010, Spain

  • Site 24-105

    Valencia, 46026, Spain

  • Site 30-101

    Rzeszów, 35-055, Poland

  • Site 30-102

    Wroclaw, 50-566, Poland

  • Site 30-103

    Ossy, 42-624, Poland

  • Site 30-104

    Krakow, 30-074, Poland

  • Site 30-105

    Lodz, 90-265, Poland

  • Site 31-101

    Cluj-Napoca, 400006, Romania

  • Site 31-102

    Bucharest, 020125, Romania

  • Site 31-103

    Iași, 700111, Romania

  • Site 33-101

    Kayseri, 38039, Turkey (Türkiye)

  • Site 33-102

    Ankara, 06560, Turkey (Türkiye)

  • Site 33-103

    Bursa, 16059, Turkey (Türkiye)

  • Site 33-104

    Antalya, 07070, Turkey (Türkiye)

  • Site 33-105

    Istanbul, 24093, Turkey (Türkiye)

  • Site 33-106

    Istanbul, 34010, Turkey (Türkiye)

  • Site 35-102

    Melbourne, Victoria, 3128, Australia

  • Site 42-101

    Kuala Lumpur, 50586, Malaysia

  • Site 42-102

    Muar town, Johor, 84000, Malaysia

  • Site 42-103

    Putrajaya, 62250, Malaysia

  • Site 42-104

    Kuala Lumpur, 56000, Malaysia

  • Site 42-105

    Kota Bharu, Kelantan, 15586, Malaysia

  • Site 42-106

    Johor Bahru, Johor, 80100, Malaysia

  • Site 42-107

    Johor Bahru, Johor, 81100, Malaysia

  • Site 42-108

    Kuching, Sarawak, 93586, Malaysia

  • Site 42-109

    Batu Caves, Selangor, 59100, Malaysia

  • Site 42-110

    Kuala Lumpur, 59100, Malaysia

  • Site 45-101

    Seoul, 05505, South Korea

  • Site 45-102

    Busan, 49241, South Korea

  • Site 45-103

    Seoul, 06591, South Korea

  • Site 45-104

    Seoul, 03722, South Korea

  • Site 46-101

    Bangkok, 10400, Thailand

  • Site 46-102

    Chiang Mai, 50200, Thailand

  • Site 46-103

    Pathum Thani, 12120, Thailand

  • Site 46-104

    Khon Kaen, 40002, Thailand

  • Site 59-101

    Tbilisi, 0160, Georgia

  • Site 59-102

    Tbilisi, 0112, Georgia

  • Site 59-103

    Tbilisi, 0179, Georgia

  • Site 59-104

    Batumi, 6000, Georgia

  • Site 59-105

    Tbilisi, 0160, Georgia

  • Site 62-101

    Sfax, 3000, Tunisia

  • Site 62-102

    Sousse, 4000, Tunisia

  • Site 62-103

    Tunis, 1007, Tunisia

  • Site 63-101

    Kaohsiung City, 83301, Taiwan

  • Site 63-102

    Taipei, 11696, Taiwan

  • Site 63-103

    New Taipei City, 23561, Taiwan

  • Site 63-104

    Taipei, 11217, Taiwan

  • Site 63-105

    Taipei, 100225, Taiwan

  • Site 64-101

    Marrakesh, 40000, Morocco

  • Site 64-102

    Oujda, 60000, Morocco

  • Site 64-103

    Casablanca, 20360, Morocco

More trials for these conditions

Other studies related to the condition(s) this trial covers.