NCT05374590Enrolling by invitationPhase 2/3
Evaluating Long-term Safety of Efgartigimod Administered Intravenously and Efgartigimod PH20 Administered Subcutaneously in Children With Generalized Myasthenia Gravis
A Long-term, Single-Arm, Open-label, Multicenter Trial to Evaluate Safety of Efgartigimod Administered Intravenously and Efgartigimod PH20 Administered Subcutaneously in Children With Generalized Myasthenia Gravis
Source: ClinicalTrials.gov · Last updated 3 Nov 2026
Brief summary (registry, in English)
The purpose of this trial is to evaluate the long-term safety of efgartigimod IV and efgartigimod PH20 SC administered to participants with gMG in the antecedent studies, ARGX-113-2006 and ARGX-113-2207, respectively. Participants will receive efgartigimod IV or efgartigimod PH20 SC, using the dose administered in the antecedent studies. Participants who have not reached the age of 18 can remain in the study until efgartigimod becomes commercially available in the respective country or available through another continued access program for gMG. Participants who have reached the age of 18 can remain in the study for a maximum of 2 years, until efgartigimod becomes commercially available in the respective country or available through another continued access program for gMG, whichever comes first.
- Status (registry)
- Enrolling by invitation
- Phase (registry)
- Phase 2/3
- Study type
- Interventional
- Enrollment
- 12 (estimated)
- First submitted
- 1 Apr 2022
- Start date
- 18 Aug 2022
- Primary completion date
- Sept 2029
- Lead sponsor
- argenx
- Diseases
- Myasthenia gravis
- NCT number
- NCT05374590
- EU CT number
- 2023-507379-23-00
- EudraCT number
- 2021-002460-46
What you commit to
- Study type: Interventional · Phase 2/3
- Planned participants: 12
- From 18 Aug 2022 to the primary completion date, Sept 2029
- 25 sites in 13 countries
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other illness
- Clinically significant uncontrolled chronic bacterial, viral, or fungal infection at study entry not sufficiently resolved in the investigator's opinion or known autoimmune disease or any medical condition that would interfere with an accurate assessment of clinical symptoms of gMG or put the participant at undue risk.
Other
- Female adolescents of childbearing potential (FAOCBP): Pregnancy or lactation, or the participant intends to become pregnant during their participation in the study.
- Discontinued early from ARGX-113-2006 or ARGX-113-2207 treatment.
Who the study is looking for
- The participant completed ARGX-113-2006, defined as:
- The participant reached End of Trial in trial ARGX-113-2006 or End of Study in ARGX-113-2207 and agreed to participate in the ARGX-113-2008 trial.
- The participant qualifies for retreatment in trial ARGX-113-2006, but cannot complete a Treatment Period (TP) and the required Intertreatment Period (IP) visits within the ARGX-113-2006 trial's timeframe.
- Either the participant or the participant's legally authorized representative can understand the requirements of the trial and provide written informed consent/assent, and willingness and ability to comply with the trial protocol procedures.
- Contraceptive use for sexually active participants should be consistent with local regulations for those participating in clinical studies.
Age in the registry: 2 years to 18 years · Sex: All · Does not accept healthy volunteers
Sites (25)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Medical University of Vienna Coordinator of this site? Confirm its status | Vienna | Austria | Completed |
| Antwerp University Hospital Coordinator of this site? Confirm its status | Edegem | Belgium | Recruiting |
| Universitair Ziekenhuis Gent Coordinator of this site? Confirm its status | Gent | Belgium | Recruiting |
| Alberta Childrens Hospital Coordinator of this site? Confirm its status | Calgary | Canada | Unknown status |
| Childrens Hospital of Eastern Ontario Coordinator of this site? Confirm its status | Ottawa | Canada | Unknown status |
| Fakultni nemocnice Brno Coordinator of this site? Confirm its status | Brno | Czechia | Not yet recruiting |
| Fakultni nemocnice Ostrava Coordinator of this site? Confirm its status | Ostrava | Czechia | Not yet recruiting |
| Charite Universitaetsmedizin Berlin KöR Coordinator of this site? Confirm its status | Berlin | Germany | Recruiting |
| Universitaetsklinikum Essen (AoR) Coordinator of this site? Confirm its status | Essen | Germany | Recruiting |
| Sant Joan De Deu Barcelona Hospital Coordinator of this site? Confirm its status | Esplugues De Llobregat | Spain | Recruiting |
| Hospital Universitario Y Politecnico La Fe Coordinator of this site? Confirm its status | Valencia | Spain | Recruiting |
| Centre Hospitalier Regional De Marseille Coordinator of this site? Confirm its status | Marseille | France | Recruiting |
| Hopital Necker Enfants Malades Coordinator of this site? Confirm its status | Paris | France | Recruiting |
| Great Ormand Street Hospital for Children NHS Foundation Trust - Great Ormond Street Hospital - Pediatric Neurology Coordinator of this site? Confirm its status | London | United Kingdom | Unknown status |
| Oxford University Hospitals NHS Foundation Trust - John Radcliffe Hospital Children's Hospital Coordinator of this site? Confirm its status | Oxford | United Kingdom | Unknown status |
| Hadassah Medical Center - Ein Kerem Coordinator of this site? Confirm its status | Jerusalem | Israel | Unknown status |
| Azienda Ospedaliera Universitaria Meyer IRCCS Coordinator of this site? Confirm its status | Florence | Italy | Not yet recruiting |
| IRCCS Istituto Giannina Gaslini Coordinator of this site? Confirm its status | Genoa | Italy | Not yet recruiting |
| Academisch Ziekenhuis Leiden Coordinator of this site? Confirm its status | Leiden | Netherlands | Recruiting |
| Uniwersyteckie Centrum Kliniczne Coordinator of this site? Confirm its status | Gdansk | Poland | Recruiting |
| Neurologia Śląska Centrum Medyczne Coordinator of this site? Confirm its status | Katowice | Poland | Recruiting |
| Uniwersyteckie Centrum Kliniczne Warszawskiego Uniwersytetu Medycznego Coordinator of this site? Confirm its status | Warsaw | Poland | Recruiting |
| Atrium Health Neurology Specialty Care Coordinator of this site? Confirm its status | Charlotte | United States | Unknown status |
| University of Virginia (UVA) Health - Developmental Pediatrics Clinic Coordinator of this site? Confirm its status | Charlottesville | United States | Unknown status |
| Ann and Robert H Lurie Children's Hospital of Chicago - Main Hospital Coordinator of this site? Confirm its status | Chicago | United States | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.