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ClinicalTrials.gov public records Last synced Oct 24, 2026, 6:33 PM EDT

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Showing 1–24 of 52 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Efgartigimod Clear all
Recruiting Phase 4 Interventional

A Study to Evaluate the Clinical Outcomes of Efgartigimod PH20 SC in Adults With New-onset Generalized Myasthenia Gravis (gMG)

NCT06909214
View directory record Official record
Conditions
New Onset Generalized Myasthenia Gravis (gMG)
Interventions
Efgartigimod PH20 SC
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
18
States / cities
La Jolla, California • Rancho Mirage, California • Boca Raton, Florida + 14 more
Source: ClinicalTrials.gov public record
Updated Mar 10, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting Phase 2 Interventional

ADAPT Forward 2 - ISA2 - a Study to Evaluate the Safety, Tolerability and Efficacy of Empasiprubart IV Monotherapy in Participants With AChR-Ab Seropositive Generalized Myasthenia Gravis

NCT07673627
View directory record Official record
Conditions
AChR-Ab Seropositive Generalized Myasthenia Gravis, Myasthenia Gravis (MG), MG - Myasthenia Gravis, gMG
Interventions
Empasiprubart IV, Placebo IV, Efgartigimod PH20 SC PFS
Biological · Other · Combination Product
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
6
States / cities
Carlsbad, California • Miami, Florida • Las Vegas, Nevada + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Phase 1 Bioequivalence Study of Efgartigimod PH20 SC Administered Via a Prefilled Syringe Versus a Vial+Syringe Presentation in Healthy Adults

NCT05817435
View directory record Official record
Conditions
Bioequivalence
Interventions
efgartigimod PH20 SC as a prefilled syringe presentation, efgartigimod PH20 SC as a vial + syringe presentation
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years to 55 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
2
States / cities
Tempe, Arizona • Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 31, 2023 · Synced Oct 24, 2026, 6:33 PM EDT
Terminated Phase 3 Interventional Results available

A Phase 3 Study to Evaluate the Long-term Safety, Tolerability and Efficacy of Efgartigimod PH20 SC in Adult Participants With Bullous Pemphigoid

NCT05681481
View directory record Official record
Conditions
Bullous Pemphigoid
Interventions
efgartigimod PH20 SC, Prednisone
Biological · Drug
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
6
States / cities
Phoenix, Arizona • Fountain Valley, California • Miami, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 25, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Completed Phase 2 Interventional Results available

A Study to Assess the Safety and Efficacy of a Subcutaneous Formulation of Efgartigimod in Adults With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP, an Autoimmune Disorder That Affects the Peripheral Nerves)

NCT04281472
View directory record Official record
Conditions
Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)
Interventions
efgartigimod PH20 SC in stage B, placebo in stage B
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
322 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
45
States / cities
Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 38 more
Source: ClinicalTrials.gov public record
Updated Aug 20, 2024 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting Phase 3 Interventional

A Study to Assess the Efficacy and Safety of Efgartigimod IV in Adult Participants With Primary Immune Thrombocytopenia

NCT06544499
View directory record Official record
Conditions
Primary Immune Thrombocytopenia (ITP)
Interventions
Efgartigimod IV, Placebo IV
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
18
States / cities
Phoenix, Arizona • Los Angeles, California • Oceanside, California + 15 more
Source: ClinicalTrials.gov public record
Updated May 1, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting Phase 2Phase 3 Interventional

Evaluating the Pharmacokinetics, Pharmacodynamics, and Safety of Efgartigimod Administered Intravenously in Children With Generalized Myasthenia Gravis

NCT04833894
View directory record Official record
Conditions
Generalized Myasthenia Gravis
Interventions
Efgartigimod IV
Biological
Lead sponsor
argenx
Industry
Eligibility
2 Years to 18 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
3
States / cities
Chicago, Illinois • Chapel Hill, North Carolina • Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Feb 18, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Enrolling by invitation Phase 3 Interventional

A Study to Assess the Long-term Safety and Efficacy of a Subcutaneous Formulation of Efgartigimod in Adults With Active Idiopathic Inflammatory Myopathy

NCT05979441
View directory record Official record
Conditions
Myositis, Active Idiopathic Inflammatory Myopathy, Dermatomyositis, Polymyositis, Immune-Mediated Necrotizing Myopathy, Antisynthetase Syndrome
Interventions
Efgartigimod PH20 SC
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
18
States / cities
Phoenix, Arizona • Beverly Hills, California • Orange, California + 15 more
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Active, not recruiting Phase 3 Interventional

A Study to Assess Efficacy and Safety of Efgartigimod PH20 SC in Adults With Ocular Myasthenia Gravis

NCT06558279
View directory record Official record
Conditions
Myasthenia Gravis, Ocular
Interventions
Efgartigimod PH20 SC, Placebo PH20 SC
Combination Product · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
141 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
20
States / cities
Scottsdale, Arizona • Loma Linda, California • Los Angeles, California + 16 more
Source: ClinicalTrials.gov public record
Updated Jul 2, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting No phase listed Observational

A Worldwide Pregnancy Safety Study to Assess Maternal, Fetal, and Infant Outcomes Following Exposure to Efgartigimod During Pregnancy and/or Breastfeeding.

NCT06299748
View directory record Official record
Conditions
Myasthenia Gravis, CIDP - Chronic Inflammatory Demyelinating Polyneuropathy
Interventions
Efgartigimod
Biological
Lead sponsor
argenx
Industry
Eligibility
Female only
Enrollment
279 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2033
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Withdrawn Phase 2 Interventional

Evaluating Efgartigimod in Patients With Guillain-Barré Syndrome

NCT05701189
View directory record Official record
Conditions
Guillain-Barre Syndrome
Interventions
Efgartigimod Alfa-Fcab, Intravenous Immunoglobulin (IVIg)
Drug
Lead sponsor
Chafic Karam
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting Phase 3 Interventional

Comparative Efficacy of Nipocalimab and Efgartigimod in Participants With Generalized Myasthenia Gravis

NCT07217587
View directory record Official record
Conditions
Myasthenia Gravis
Interventions
Nipocalimab, Efgartigimod
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 74 Years
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
16
States / cities
Fullerton, California • Pomona, California • Fort Collins, Colorado + 13 more
Source: ClinicalTrials.gov public record
Updated Sep 25, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Completed Phase 3 Interventional Results available

Evaluating the Pharmacodynamic Noninferiority of Efgartigimod PH20 SC Administered Subcutaneously as Compared to Efgartigimod Administered Intravenously in Patients With Generalized Myasthenia Gravis

NCT04735432
View directory record Official record
Conditions
Generalized Myasthenia Gravis
Interventions
efgartigimod PH20 SC, efgartigimod IV
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
14
States / cities
Carlsbad, California • Orange, California • Boca Raton, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Feb 28, 2023 · Synced Oct 24, 2026, 6:33 PM EDT
Completed Phase 3 Interventional

A Long-term Study to Assess the Safety and Efficacy of Efgartigimod in Adult Patients With Primary Immune Thrombocytopenia (ITP).

NCT04225156
View directory record Official record
Conditions
Primary Immune Thrombocytopenia
Interventions
efgartigimod
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
4
States / cities
Washington D.C., District of Columbia • Ocala, Florida • Iowa City, Iowa + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Completed Phase 2Phase 3 Interventional

A Study to Investigate the Efficacy and Safety of Efgartigimod PH20 SC in Adult Participants With Active Idiopathic Inflammatory Myopathy.

NCT05523167
View directory record Official record
Conditions
Active Idiopathic Inflammatory Myopathy, Myositis, Dermatomyositis, Polymyositis, Immune-Mediated Necrotizing Myopathy, Antisynthetase Syndrome
Interventions
EFG PH20 SC, PBO
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
265 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
40
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Beverly Hills, California + 35 more
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting Phase 2 Interventional

A Pilot Study of Efgartigimod for Immune-mediated Thrombotic Thrombocytopenic Purpura (iTTP)

NCT06831058
View directory record Official record
Conditions
Immune-mediated Thrombotic Thrombocytopenic Purpura
Interventions
efgartigimod
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Active, not recruiting Phase 3 Interventional

A Study of the Efficacy and Safety of Efgartigimod in Patients With Primary Sjögren's Syndrome

NCT06684847
View directory record Official record
Conditions
Primary Sjogrens Disease
Interventions
Efgartigimod PH20 SC, Placebo PH20 SC
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
631 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
42
States / cities
Scottsdale, Arizona • Sun City, Arizona • Tucson, Arizona + 36 more
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting No phase listed Observational

ADAPT Forward - Master Protocol of a Platform Study to Evaluate the Safety and Efficacy of Multiple Regimens in Participants With Myasthenia Gravis

NCT07294170
View directory record Official record
Conditions
Myasthenia Gravis, MG, gMG, Generalized Myasthenia Gravis, Generalized Myasthenia Gravis (gMG), AChR-Ab Seropositive Generalized Myasthenia Gravis
Interventions
Efgartigimod IV, Empasiprubart IV, Placebo IV, Efgartigimod PH20 SC PFS
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
15
States / cities
Carlsbad, California • Miami, Florida • Tampa, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting Phase 2 Interventional

ADAPT Forward 1 - ISA1 - a Study to Evaluate Empasiprubart IV as add-on Therapy to Efgartigimod IV in Participants With AChR-Ab Seropositive Generalized Myasthenia Gravis With a Partial Clinical Response to Efgartigimod

NCT07284420
View directory record Official record
Conditions
AChR-Ab Seropositive Generalized Myasthenia Gravis, Myasthenia Gravis, MG, gMG, Generalized Myasthenia Gravis, Generalized Myasthenia Gravis (gMG)
Interventions
Efgartigimod IV, Empasiprubart IV
Biological
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
14
States / cities
Carlsbad, California • Miami, Florida • Tampa, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting Phase 2 Interventional

Efgartigimod for the Treatment of Acute Optic Neuritis

NCT06453694
View directory record Official record
Conditions
Optic Neuritis
Interventions
Efgartigimod Alfa, Placebo
Drug
Lead sponsor
Anastasia Vishnevetsky, MD, MPH
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 10, 2025 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting Phase 2 Interventional

A Study to Evaluate the Efficacy and Safety of Maintenance Ublituximab Following Induction With Efgartigimod Administration in Participants With Myasthenia Gravis (MG)

NCT07673744
View directory record Official record
Conditions
Myasthenia Gravis
Interventions
Ublituximab, Placebo
Drug
Lead sponsor
TG Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
6
States / cities
Colorado Springs, Colorado • Clearwater, Florida • Farmington Hills, Michigan + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 22, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Terminated Phase 3 Interventional

A Study of Efgartigimod PH20 SC Given by Prefilled Syringe in Adults With Thyroid Eye Disease

NCT06307613
View directory record Official record
Conditions
Thyroid Eye Disease
Interventions
Efgartigimod PH20 SC, Placebo PH20 SC
Combination Product · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
16
States / cities
Beverly Hills, California • Irvine, California • Los Angeles, California + 13 more
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Oct 24, 2026, 6:33 PM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Efficacy and Safety of Efgartigimod PH20 Subcutaneous in Adult Patients With Primary Immune Thrombocytopenia

NCT04687072
View directory record Official record
Conditions
Primary Immune Thrombocytopenia
Interventions
Efgartigimod PH20 SC, Placebo PH20 SC
Biological · Other
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
207 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
14
States / cities
Springdale, Arkansas • Los Angeles, California • Washington D.C., District of Columbia + 10 more
Source: ClinicalTrials.gov public record
Updated Oct 31, 2024 · Synced Oct 24, 2026, 6:33 PM EDT
Recruiting Phase 4 Interventional

Treatment of Myasthenia Gravis Exacerbation or Crisis With Efgartigimod

NCT06860633
View directory record Official record
Conditions
Myasthenia Gravis Crisis, Myasthenia Gravis Exacerbations, AChR Myasthenia Gravis
Interventions
Efgartigimod
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 11, 2025 · Synced Oct 24, 2026, 6:33 PM EDT