Safety study of patients treated with efgartigimod for Myasthenia Gravis

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

Observational argenx · NCT06298565

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.

Quick facts

Study typeObservational
Enrollment680 (estimated)
Ages18 Years and up
SexAll
Sponsorargenx Industry-sponsored
Locations35 sites (San Francisco, California and 34 other locations)
Trial IDNCT06298565 on ClinicalTrials.gov

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.

Who should consider this trial

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

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.

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 performed: 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.

Eligibility criteria

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 this trial is running

San Francisco, California and 34 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Myasthenia Gravis
Last reviewed 2026-06-13 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.