CI

At a glance

ClinicalIndex Comparison Record
Phase 3Completed· 69 enrolled
Drug / intervention
Efgartigimod IVbiological
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04980495
NCT04980495Phase 3Completed

A Phase 3b, Randomized, Open-label, Parallel-Group Study to Evaluate Different Dosing Regimens of Intravenous Efgartigimod to Maximize and Maintain Clinical Benefit in Patients With Generalized Myasthenia Gravis

argenx·interventional·Posted Jul 28, 2021·Updated May 27, 2026

In Brief

A Phase 3 clinical trial evaluating Efgartigimod IV for Generalized Myasthenia Gravis and 2 related conditions. Completed, enrolled 69 participants across 39 sites in 11 countries.

Detailed Summary

The purpose of this open-label study is to investigate the efficacy, safety, and tolerability of a continuous regimen of efgartigimod compared with a cyclic regimen in participants with Generalized Myasthenia Gravis (gMG). Participants will receive efgartigimod throughout the study. The participants will be randomized to the continuous regimen arm or to the cyclic regimen arm. The study consists of a part A (regimen comparison period) where participants will continue the treatment based on the treatment regimen arm they were assigned at randomization. Following part A, participants will enter part B (extension period) where all participants will receive efgartigimod in the continuous regimen. The study duration for participants is up to 138 weeks.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesAustria, Belgium, Canada, France, Georgia, Germany, Italy, Netherlands, Poland, Spain, United States
Collaborators--

Timeline

Phase 3CompletedFinished
20222023202420252026
First PostedJul 28, 2021
Enrollment StartDec 16, 2021
Primary CompletionAug 24, 2023
Study CompletionOct 6, 2025
TodayJul 2, 2026
Enrollment to primary: 1.7 yearsPosted 4.9 years ago

Interventions

Efgartigimod IVbiological

Intravenous infusions of efgartigimod