Clinical trial Recruiting at 35 sites Observational Ages 18 and up

Safety study of patients treated with efgartigimod for Myasthenia Gravis

Official title: A Non-interventional, Post-authorisation Safety Study of Patients Treated With Efgartigimod Alfa

Run by argenx · NCT06298565 · Data updated 2026-11-12

This study is testing how safe the medication efgartigimod is for people with generalized Myasthenia Gravis who are just starting treatment or are in their first treatment cycle.

More Myasthenia Gravis trials

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment680 (estimated)
Sponsorargenx
Industry-sponsored
Locations35 sites (San Francisco, California and 34 other locations)
StatusRecruiting
StartedNovember 4, 2024
Main results expectedJune 2034
Study endsJune 2034
Registry record updatedFebruary 17, 2026
Trial IDNCT06298565 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include patients diagnosed with generalized Myasthenia Gravis who are starting or have recently started treatment with efgartigimod.

Probably not a fit

Patients who are not diagnosed with generalized Myasthenia Gravis or those who are not starting efgartigimod treatment will 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 non-interventional, prospective safety study focusing on patients with generalized Myasthenia Gravis (gMG) who are either starting treatment with efgartigimod or are within their first treatment cycle. The study includes two cohorts: one for patients beginning efgartigimod and another for those who have not been exposed to the treatment. The aim is to monitor the safety and tolerability of efgartigimod in real-world settings. Participants will provide informed consent before enrollment.

Why it matters

Potential benefit: If successful, this study could provide valuable safety data that enhances the understanding of efgartigimod's effects in gMG patients.

How similar studies have gone: While this study is observational and focuses on safety, similar studies have shown success in monitoring treatment effects in other conditions, indicating a potential for valuable insights.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients diagnosed with gMG who are expected to start commercial efgartigimod at enrolment or who are within their first cycle of efgartigimod at enrolment or Patients diagnosed with gMG who have not been exposed to efgartigimod and for whom it is not planned to start treatment with efgartigimod at enrolment
* Have provided appropriate written informed consent

Exclusion Criteria:

* None

Where it's running

  • UCSF Medical Center - Helen Diller Family Comprehensive Cancer Center - Brain Tumor Center,
    San Francisco, California, United States
    Recruiting
  • SFM Clinical Research, LLC
    Boca Raton, Florida, United States
    Recruiting
  • University of Florida College of Medicine Jacksonville
    Jacksonville Beach, Florida, United States
    Recruiting
  • Medsol Clinical Research Center Inc
    Port Charlotte, Florida, United States
    Recruiting
  • BayCare Health System, Inc. St Anthony's Hospital
    St. Petersburg, Florida, United States
    Recruiting
  • Prairie Education and Research Cooperative and HSHS Medical Group
    O'Fallon, Illinois, United States
    Recruiting
Show 29 more locations
  • University of Iowa
    Iowa City, Iowa, United States
    Recruiting
  • University of Kansas Medical Center
    Kansas City, Kansas, United States
    Recruiting
  • Norton Neuroscience Institute
    Louisville, Kentucky, United States
    Recruiting
  • Massachusetts General Hospital
    Boston, Massachusetts, United States
    Recruiting
  • Beth Israel Deaconess Medical Center
    Boston, Massachusetts, United States
    Recruiting
  • Henry Ford Health System
    Detroit, Michigan, United States
    Recruiting
  • Oregon Health and Science University
    Portland, Oregon, United States
    Recruiting
  • University of Colorado Hospital
    Portland, Oregon, United States
    Recruiting
  • Medical University of South Carolina
    Charleston, South Carolina, United States
    Recruiting
  • National Neuromuscular Research Institute
    Austin, Texas, United States
    Recruiting
  • BCN Research, LLC - Gamma Therapeutic Center
    Greenfield, Wisconsin, United States
    Recruiting
  • Kepler Universitätsklinikum, Universitätsklinik für Neurologie, Med Campus III
    Linz, Austria
    Recruiting
  • UZ Leuven (University Hospitals Leuven)
    Leuven, Belgium
    Recruiting
  • Klinikum Altenburger Land GmbH
    Altenburg, Germany
    Recruiting
  • St. Josef-Hospital Klinikum der Ruhr Universitaet Bochum
    Bochum, Germany
    Recruiting
  • Klinikum Christophsbad
    Göppingen, Germany
    Recruiting
  • Georg-August-Universität Göttingen
    Göttingen, Germany
    Recruiting
  • Klinikum Oberberg
    Gummersbach, Germany
    Recruiting
  • Universitätsklinikum Jena
    Jena, Germany
    Recruiting
  • Universitätsklinikum Würzburg
    Würzburg, Germany
    Recruiting
  • Piazza OMS - Organizzazione Mondiale della Sanità
    Bergamo, Italy
    Recruiting
  • Ospedale Bellaria - Clinica Neurologica
    Bologna, Italy
    Recruiting
  • Azienda Ospedaliera di Rilievo Nazionale Cardarelli
    Naples, Italy
    Recruiting
  • Azienda Ospedaliero Universitaria Pisana
    Pisa, Italy
    Recruiting
  • Fondazione Policlinico Universitario Agostino Gemelli IRCCS
    Roma, Italy
    Recruiting
  • Hospital Universitari Vall d'Hebron, Unitat de Malalties Neuromusculars, Servei de Neurologia
    Barcelona, Spain
    Recruiting
  • Hospital Universitari de Bellvitge
    Barcelona, Spain
    Recruiting
  • Hospital Clinico Universitario San Carlos
    Madrid, Spain
    Recruiting
  • Hospital Universitario Virgen Macarena
    Seville, Spain
    Recruiting

Study contacts

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.