Clinical Trials

A Global, Multicenter, Randomized, Double-Blinded, Placebo-Controlled, Phase 2 Study to Evaluate the Efficacy, Safety, and Tolerability of Efgartigimod PH20 SC in Adult and Adolescent Participants With Autoimmune Encephalitis.

A Phase 3, Randomized, Double-Blinded, Double-Dummy Study Evaluating the Efficacy and Safety of Intravenous Empasiprubart  Versus Intravenous Immunoglobulin in Adults With Chronic Inflammatory Demyelinating Polyneuropathy.

A Phase 3, Randomized, Double-Blinded, Placebo-Controlled Study Evaluating the Efficacy and Safety of Empasiprubart IV in Adults With Chronic Inflammatory Demyelinating Polyneuropathy.

Phase 3, Multicenter, Randomized, Double-Blinded, Placebo-Controlled Study With an Open-Label Extension to Evaluate the Efficacy and Safety of Intravenous Adimanebart in Adult and Pediatric Participants With DOK7-,MUSK-, AGRN-, or LRP4-CMS.

Multicenter, Multinational, Natural History Study in Participants With Congenital Myasthenic Syndromes Due to Mutations in DOK7, MUSK, AGRN, or LRP4.

A Phase 1b, Double-Blinded, Randomized, Placebo-Controlled Study to Assess the Safety, Tolerability, Pharmacokinetics, Immunogenicity, and Efficacy of ARGX-119 in Adult Participants with DOK7-Congenital Myasthenic Syndromes.

Phase 2, Multicenter, Randomized, Double-Blinded, Placebo-Controlled Study to Assess the Safety, Efficacy, and Tolerability of ARGX-117 in Improving Allograft Function in Recipients of a Deceased Donor Renal Allograft at Risk for Delayed Graft Function.

A Phase 3, Randomized, Double-Masked, Placebo-Controlled, Multicenter Study Evaluating the Efficacy and Safety of Efgartigimod PH20 SC PFS in Adult Participants With Graves' Disease Inadequately Controlled With Antithyroid Drugs

The embridge study aims to learn more about the safety of the investigational study drug and how it works with placebo when given together with intravenous immunoglobulin (IVIg) in adults with Guillain-Barré syndrome (GBS). IVIg is a standard care for GBS, and all participants will receive this treatment.

A Phase 3, Randomized, Double-Blinded, Placebo-Controlled, Parallel-Arm Study to Evaluate the Efficacy and Safety of Efgartigimod IV in Adult Participants with Primary Immune Thrombocytopenia.

A Multicenter, Randomized, Double-blinded, Parallel-Arm, Placebo-Controlled, Pharmacokinetic and Pharmacodynamic Study Followed by an Open-Label Arm to Evaluate Efgartigimod IV in Pediatric Participants From 12 Years to Less Than 18 Years of Age With Chronic ITP

A Phase 2, Multicenter, Randomized, Placebo-Controlled Study to Evaluate the Efficacy, Safety, and Tolerability of ARGX-121 SC in Adult Participants With Primary IgA Nephropathy.

A Phase 3, Randomized, Double-Blinded, Double-Dummy Study Evaluating the Efficacy and Safety of Empasiprubart Versus Intravenous Immunoglobulin in Adults with Multifocal Motor Neuropathy.

A Phase 2, Randomized, Double-Blinded, Placebo-Controlled, Parallel-Group, Multicenter Trial to Evaluate the Safety and Tolerability, Efficacy, Pharmacokinetics, Pharmacodynamics, and Immunogenicity of 2 Dose Regimens of ARGX-117 in Adults With Multifocal Motor Neuropathy.

A Multicenter Prospective Longitudinal Study of Clinical Outcomes, Disease Course, Health-Related Quality of Life, and Health Care Resource Utilization in Adult Patients With Multifocal Motor Neuropathy.

An Open-Label, Single-Arm, Phase 1b Study to Evaluate the Effect of Empasiprubart on Nerve Morphology by Ultrasound in Adults With Multifocal Motor Neuropathy.

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.

A Phase 3, Randomized, Double-Blinded, Placebo-Controlled, Parallel-Group Design Study Evaluating the Efficacy and Safety of Efgartigimod PH20 SC Administered by Prefilled Syringe in Adult Participants with Ocular Myasthenia Gravis.

Open-label Uncontrolled Trial to Evaluate Pharmacokinetics, Pharmacodynamics, Safety, and Activity of Efgartigimod in Children From 2 to Less Than 18 Years of Age With Generalized Myasthenia Gravis.

Open-label, Uncontrolled Study to Evaluate the Pharmacokinetics, Pharmacodynamics, Safety, and Activity of Efgartigimod PH20 SC in Participants From 2 to Less Than 18 Years of Age With Generalized Myasthenia Gravis.

A Master Protocol for an Exploratory, Phase 2a, Proof-of-Concept Platform Study to Evaluate the Safety, Tolerability, and Efficacy of Multiple Regimens in Participants With Myasthenia Gravis.

Post-approval Non-Interventional Safety Study Observational, non-interventional, post-approval safety study (Ph4) in adult patients who have been diagnosed with generalized myasthenia gravis (gMG).

A Worldwide Pregnancy Safety Study (Ph4) to Assess Maternal, Fetal, and Infant Outcomes Following Exposure to Efgartigimod During Pregnancy And/Or Breastfeeding.

A Phase 2/3, Randomized, Double-Blinded, Placebo-Controlled, Parallel-Group, 2-Arm, Multicenter, Operationally Seamless Study to Evaluate the Efficacy, Safety, Tolerability, Pharmacodynamics, Pharmacokinetics, and Immunogenicity of Efgartigimod PH20 SC in Participants Aged 18 Years and Older With Active Idiopathic Inflammatory Myopathy.

A Phase 3 Randomized, Double-Blinded, Placebo-Controlled Multicenter Trial with Open-Label Extension to Evaluate the Efficacy, Safety, and Tolerability of Efgartigimod PH20 Subcutaneous Administered by Prefilled Syringe in Adult Patients with Primary Sjögren's Disease.

A Study to Assess the Safety, Tolerability, Efficacy, Pharmacokinetics, and Immunogenicity of Intravenous Administration of ARGX-119 in Pediatric Participants Aged 5 to Less Than 18 Years With Spinal Muscular Atrophy (Sparkle).