Clinical trial No longer in our active list Phase 3 Interventional Ages 18 to 55

Evaluating IMU-838 for treating relapsing multiple sclerosis

Official title: A Multi-Center, Randomized, Double-Blinded Phase 3 Study to Evaluate the Efficacy, Safety, and Tolerability of IMU-838 Versus Placebo in Adults With Relapsing Multiple Sclerosis (ENSURE-2)

Run by Immunic AG · NCT05201638 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing a new medication called IMU-838 to see if it can help adults with relapsing multiple sclerosis feel better and manage their symptoms.

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years to 55 Years
SexAll
Enrollment1050 (estimated)
SponsorImmunic AG
Industry-sponsored
Locations91 sites (Scottsdale, Arizona and 90 other locations)
Trial IDNCT05201638 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults aged 18 to 55 with an established diagnosis of relapsing multiple sclerosis and evidence of active disease.

Probably not a fit

Patients with non-active secondary progressive multiple sclerosis or primary progressive multiple sclerosis may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a multicenter, randomized, double-blind, placebo-controlled Phase 3 study designed to assess the efficacy, safety, and tolerability of IMU-838 in adults diagnosed with relapsing multiple sclerosis (RMS). The study includes a screening period of approximately 28 days, followed by a main treatment period lasting 72 weeks, and an open-label extension period that may last up to 8 years. Participants will receive either IMU-838 or a placebo, and their responses will be monitored throughout the study.

Why it matters

Potential benefit: If successful, this study could provide a new treatment option for patients with relapsing multiple sclerosis, potentially improving their quality of life.

How similar studies have gone: Other studies evaluating similar treatments for relapsing multiple sclerosis have shown promising results, indicating potential for success in this approach.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Male or female patient (age ≥18 to ≤55 years).
* Patients with an established diagnosis of MS according to 2017 McDonald Criteria.
* Patients with RMS comprising of relapsing remitting MS (RRMS) and active secondary progressive MS, both defined according to Lublin criteria 1996 and 2014.
* Active disease as defined by Lublin 2014 evidenced prior to Screening by:

  1. At least 2 relapses in the last 24 months before randomization, or
  2. At least 1 relapse in the last 12 months before randomization, or
  3. A positive Gd+ MRI scan (brain and/or spine) in the last 12 months prior to randomization.
* Willingness and ability to comply with the protocol.
* Written informed consent given prior to any study-related procedure.

Exclusion Criteria:

* Patients with non-active secondary progressive MS and primary progressive MS.
* Any disease other than MS that may better explain the signs and symptoms, including history of complete transverse myelitis.
* Clinical signs or presence of laboratory findings suggestive for neuromyelitis optica (NMO) spectrum disorders or myelin oligodendrocyte glycoprotein (MOG)-IgG-associated encephalomyelitis
* Any active and uncontrolled coexisting autoimmune disease, other than MS (except for type 1 diabetes mellitus and inflammatory bowel disease)
* Use of experimental/investigational drug (with the exception of COVID-19 vaccines approved by emergency use authorization) and/or participation in drug clinical studies within 6 months prior to Screening
* Previous or current use of MS treatments lifelong, or within a pre-specified time period.
* Use of the pre-specified concomitant medications.
* Clinically significantly abnormal and pre-specified lab values.
* History of chronic systemic infections within 6 months before the date of informed consent.
* Diagnosis or suspected liver function impairment, which may cause fluctuating liver function tests during this study.
* Known history of nephrolithiasis or underlying condition with a strong association of nephrolithiasis.
* History or clinical diagnosis of gout.
* History or presence of any major medical or psychiatric illness
* Substantial medical condition that could create undue risk to the patient, could affect adherence with the study protocol or could undesirably affect study outcomes

Where it's running

  • HonorHealth Research Institute - Bob Bove Neuroscience Institute
    Scottsdale, Arizona, United States
    Recruiting
  • Neuro of Central Florida
    Altamonte Springs, Florida, United States
    Recruiting
  • Healthcare Innovations
    Coral Springs, Florida, United States
    Recruiting
  • Homestead Associates
    Miami, Florida, United States
    Recruiting
  • Premier Clinical Research
    Miami, Florida, United States
    Recruiting
  • Baptist Health Lexington
    Nicholasville, Kentucky, United States
    Recruiting
Show 44 more locations
  • Boston Clinical Trials
    Boston, Massachusetts, United States
    Recruiting
  • Heratsi Hospital Complex 1
    Yerevan, Armenia
    Recruiting
  • Erebouni Medical Center
    Yerevan, Armenia
    Recruiting
  • UCC of Rep of Srpska
    Banja Luka, Bosnia and Herzegovina
    Recruiting
  • Cantonal Hospital Bihac Dr. Irfan Ljubijankic
    Bihać, Bosnia and Herzegovina
    Recruiting
  • University Clinical Center of Sarajevo
    Sarajevo, Bosnia and Herzegovina
    Recruiting
  • University Clinical Center Sarajevo
    Sarajevo, Bosnia and Herzegovina
    Recruiting
  • University Clinical Center Tuzla
    Tuzla, Bosnia and Herzegovina
    Recruiting
  • Astra Clinic
    Tallinn, Estonia
    Recruiting
  • Post-Graduation Institute of Medical Education and Research (PGIMER)
    Chandigarh, India
    Recruiting
  • Fortis Memorial Research Institute
    Gurugramam, India
    Recruiting
  • Dr Ram Manohar Lohia Institute of Medical Sciences
    Lucknow, India
    Recruiting
  • All India Institute of Medical Sciences
    New Delhi, India
    Recruiting
  • GB Pant Institute of Postgraduate Medical Education and Research
    New Delhi, India
    Recruiting
  • SRI Guru Ram Das Institute of Medical Sciences and Research
    Punjabi Bagh, India
    Recruiting
  • Dks Pgi
    Raipur, India
    Recruiting
  • Centro de Investig. Médicas
    Lima, Peru
    Recruiting
  • NZOZ Wielospecjalistyczna Poradnia Lekarska "Synapsis"
    Katowice, Poland
    Recruiting
  • Neuro-Medic Janusz Zbrojkiewicz
    Katowice, Poland
    Recruiting
  • NZOZ Neuromed
    Lublin, Poland
    Recruiting
  • Indywidualna Praktyka Lekarska prof. Konrad Rejdak
    Lublin, Poland
    Recruiting
  • Instytut Zdrowia Boczarska
    Oświęcim, Poland
    Recruiting
  • NZOZ Hertmanowskiej
    Plewiska, Poland
    Recruiting
  • NZOZ Neuro-Kard
    Poznań, Poland
    Recruiting
  • Centrum Medyczne NeuroProtect
    Warsaw, Poland
    Recruiting
  • FutureMeds Warszawa Centrum
    Warsaw, Poland
    Recruiting
  • Centrum Med. Ibismed
    Zabrze, Poland
    Recruiting
  • SC Sana Monitoring SRL
    Bucharest, Romania
    Recruiting
  • Elias University Emergency Hospital
    Bucharest, Romania
    Recruiting
  • Spitalul clinic CF Constanta
    Constanţa, Romania
    Recruiting
  • Asociatia Comunitatea Oamenilor
    Craiova, Romania
    Recruiting
  • Clubul Sanatatii SRL
    Câmpulung, Romania
    Recruiting
  • Aria Clinic SRL
    Sibiu, Romania
    Recruiting
  • Spit Jud Branzeu TIM Neuro
    Timişoara, Romania
    Recruiting
  • Klinicko bolnicki centar Dr Dragisa Misovic - Dedinje
    Belgrade, Serbia
    Recruiting
  • Klinicko bolnicki centar Zvezdara
    Belgrade, Serbia
    Recruiting
  • Opsta bolnica Medicinski sistem Beograd
    Belgrade, Serbia
    Recruiting
  • Vojnomedicinska akademija
    Belgrade, Serbia
    Recruiting
  • Univerzitetski Klinicki centar Kragujevac
    Kragujevac, Serbia
    Recruiting
  • Univerzitetski Klinicki centar Kragujevac
    Kragujevac, Serbia
    Recruiting
  • Univerzitetski Klinicki centar Nis
    Niš, Serbia
    Recruiting
  • Hsptl Sveti Vracevi
    Novi Kneževac, Serbia
    Recruiting
  • General Hospital Uzice
    Užice, Serbia
    Recruiting
  • Klinicko Bolnicki centar Zemun
    Zemun, Serbia
    Recruiting

+41 more sites. See ClinicalTrials.gov for the full list.

Study contacts

  • Principal investigator: Robert J. Fox, MD — Mellen Center for MS, Neurological Institute, Cleveland Clinic, Ohio
  • Study coordinator: Andreas Muehler, MD
  • Email: info@imux.com
  • Phone: +49 89 2080 477 00

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.