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NCT06298552PHASE3ACTIVE_NOT_RECRUITING

A Phase 3 Study to Evaluate the Efficacy and Safety of Efgartigimod IV in Patients With Acetylcholine Receptor Binding Antibody Seronegative Generalized Myasthenia Gravis

A Randomized, Double-Blinded, Placebo-Controlled, Phase 3, Parallel-Group Design Study Evaluating the Efficacy and Safety of Efgartigimod IV in Adult Participants With Acetylcholine Receptor Binding Antibody Seronegative Generalized Myasthenia Gravis

Sponsor: argenx

No open prediction endpoints

Endpoints are classified and published by ProgramSignal analysts.

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Key Facts

Study type
INTERVENTIONAL
Conditions
Generalized Myasthenia Gravis, gMG, Myasthenia Gravis, Generalized, Myasthenia Gravis
Interventions
Efgartigimod IV, Placebo IV
Enrollment
119 participants
Primary completion
Jun 2025
Study completion
Jun 2027
First posted
Mar 2024
Last updated
Nov 2025

Primary Endpoints (CT.gov)

MG-ADL total score change from baseline

Time frame: Up to 29 days (part A)

Secondary Endpoints

QMG total score change from baseline

Proportion of participants who are both MG-ADL and QMG responders in part A

Proportion of participants with MSE

Eligibility Criteria

Inclusion Criteria: * The participant is at least 18 years of age and the local legal age of consent for clinical studies when signing the ICF. * The participant is capable of providing signed informed consent and following with protocol requirements. * The participant agrees to use contraceptive measures consistent with local regulations and the women of child-bearing potential (WOCBP) must have a negative serum pregnancy test result at screening and a negative urine pregnancy test result at baseline before receiving the study drug. * The participant has no known weakness in infancy and later develop fatigable weakness after aged 16 years and diagnosed with acquired gMG of both of the following: 1. History of abnormal neuromuscular transmission demonstrated by single fiber electromyography or repetitive nerve stimulation (RNS) or is anti-muscle-specific kinase antibodies (MuSK-Ab) seropositive 2. Either a history of positive edrophonium chloride test OR a demonstrated improvemen

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✦ Analyst Commentary

Expert commentary on why this trial matters and what to watch for.

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Source

Open on ClinicalTrials.gov

Related Program

Efgartigimod (Vyvgart) — ADAPT SERON

argenx

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