NCT06765161

Efgartigimod in IVIG Dependent Myasthenia Gravis Patients

• Status: Recruiting
• Phase: Phase 3
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: Clinique Neuro-Outaouais · Academic / Other
• Sex: All
• Age: 18 Years – 80 Years
• Healthy volunteers: Not accepted

Summary

This study is an open label, single center, prospective, 26 weeks study with descriptive analysis where IVIG is replaced by efgartigimod therapy. MG-ADL and MGQOL evaluations will occur weekly throughout the study to week 26.

Detailed description

Objectives: To determine if efgartigimod is equivalent or non-inferior in efficacy to IVIG in the treatment of stable, acetylcholine receptor antibody positive, IVIG dependent myasthenia gravis patients. To determine patient treatment preference between IVIG and efgartigimod in stable, IVIG dependent acetylcholine receptor antibody positive myasthenia gravis patients. To determine the safety and tolerability of efgartigimod administered in a fixed regular dosing regimen over 6 months in stable IVIG dependent acetylcholine receptor antibody positive myasthenia gravis patients. IVIG will be discontinued one week prior to the baseline visit (week 0) while other concurrent medications (non-steroidal immunosuppressive therapies (NSISTs), acetylcholinesterase (AChE) inhibitors or corticosteroids) for myasthenia will be kept unchanged for the duration of the study. The dose and frequency of efgartigimod treatment will be 10mg/kg (max of 1200mg) administered as a one-hour intravenous infusion every week x 4 infusions followed by a four-week break and repeated for a total four treatment cycles till week 24 and then followed by a two-week observation with an end of study visit at week 26.

Conditions

• Myasthaenia Gravis

Interventions

Type	Name	Description
DRUG	efgartigimod administration	efgartigimod infusion

Timeline

• Start date: 2025-02-06
• Primary completion: 2027-01-06
• Completion: 2027-01-06
• First posted: 2025-01-09
• Last updated: 2025-07-29

Locations

1 site across 1 country: Canada