Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 3INTERVENTIONAL

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

Efficacy and Safety of Nipocalimab vs Efgartigimod for Patients With Generalized Myasthenia Gravis in a Randomized, Open-label, Phase 3b, Interventional Trial Including Within Class Switching From Efgartigimod to Nipocalimab

Comparative Efficacy of Nipocalimab and Efgartigimod in Participants With Generalized Myasthenia Gravis (NCT07217587) is a Phase 3 interventional studying Myasthenia Gravis, sponsored by Janssen Research & Development, LLC. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

About This Trial

What Stage of Research Is This?

Phase 3 trials confirm efficacy and safety in large patient groups (often 300–3,000+) and form the evidence base for an FDA approval submission. For Myasthenia Gravis, Phase 3 studies typically randomize participants between the investigational treatment and either a placebo or current standard of care. A successful Phase 3 result is the threshold most treatments need to clear before regulatory approval.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

Target enrollment of 115 participants puts this in the typical range for a Phase 2-style efficacy study or a moderate Phase 3 trial in a focused Myasthenia Gravis subpopulation. At this scale, the study has enough statistical power to detect a clear treatment effect but is not the largest cohort in the field.

Who May Be Eligible (Plain English)

Who May Qualify: For all arms: - Medically stable on the basis of physical examination, medical history, vital signs, clinical laboratory tests, and 12-lead electrocardiogram (ECG) performed at screening - Diagnosis of myasthenia gravis (MG) with generalized muscle weakness meeting the clinical criteria for generalized MG (gMG) as defined by the Myasthenia gravis foundation of America (MGFA) clinical classification class II a/b, III a/b, or IV a/b at screening and positive for acetylcholine receptor (AChR) antibodies - Myasthenia Gravis-Activities of Daily Living (MG-ADL) score of greater than or equal to (\>=) 5 with less than (\<) 50% of symptoms coming from ocular MG-ADL sub-scores at study screening and baseline (Day 1) visits Criteria specific to Arms 1 and 2 only: \- Has suboptimal response to current stable therapy for gMG according to the investigator or has discontinued corticosteroids and/or immunosuppressants/immunomodulators including eculizumab or other novel approved immune agents at least 4 weeks prior to baseline due to intolerance or lack of efficacy Criteria specific to Arm 3: \- Treatment with efgartigimod IV or subcutaneous (SC) for \>=1 cycle, and the final cycle is consistent with product information Who Should NOT Join This Trial: - Any confirmed or suspected clinical weakened immune system syndrome not related to treatment of his/her gMG, or has a family history of congenital or hereditary weakened immune system unless confirmed absent in the participant - Had a thymectomy within 1 year prior to baseline, or thymectomy is planned during the study - Currently has a malignancy or has a history of malignancy within 3 years before baseline Criteria specific to Arms 1 and 2 only: \- Has received treatment for MG with an FcRn-targeting therapy Criteria specific to Arm 3 only: ...See full criteria on ClinicalTrials.gov Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language

Inclusion criteria: For all arms: * Medically stable on the basis of physical examination, medical history, vital signs, clinical laboratory tests, and 12-lead electrocardiogram (ECG) performed at screening * Diagnosis of myasthenia gravis (MG) with generalized muscle weakness meeting the clinical criteria for generalized MG (gMG) as defined by the Myasthenia gravis foundation of America (MGFA) clinical classification class II a/b, III a/b, or IV a/b at screening and positive for acetylcholine receptor (AChR) antibodies * Myasthenia Gravis-Activities of Daily Living (MG-ADL) score of greater than or equal to (\>=) 5 with less than (\<) 50% of symptoms coming from ocular MG-ADL sub-scores at study screening and baseline (Day 1) visits Criteria specific to Arms 1 and 2 only: \- Has suboptimal response to current stable therapy for gMG according to the investigator or has discontinued corticosteroids and/or immunosuppressants/immunomodulators including eculizumab or other novel approved immune agents at least 4 weeks prior to baseline due to intolerance or lack of efficacy Criteria specific to Arm 3: \- Treatment with efgartigimod IV or subcutaneous (SC) for \>=1 cycle, and the final cycle is consistent with product information Exclusion criteria: * Any confirmed or suspected clinical immunodeficiency syndrome not related to treatment of his/her gMG, or has a family history of congenital or hereditary immunodeficiency unless confirmed absent in the participant * Had a thymectomy within 1 year prior to baseline, or thymectomy is planned during the study * Currently has a malignancy or has a history of malignancy within 3 years before baseline Criteria specific to Arms 1 and 2 only: \- Has received treatment for MG with an FcRn-targeting therapy Criteria specific to Arm 3 only: \- Is currently taking IgG monoclonal antibody therapeutics, or Fc-conjugated therapeutic agents, including factor or enzyme replacement, with the exception of efgartigimod

Treatments Being Tested

DRUG

Nipocalimab

Nipocalimab will be administered intravenously.

DRUG

Efgartigimod

Efgartigimod will be administered intravenously.

Locations (8)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

University of Connecticut

Farmington, Connecticut, United States

SFM Clinical Research LLC

Boca Raton, Florida, United States

HSHS St. Elizabeth's Hospital

O'Fallon, Illinois, United States

Henry Ford Hospital

Detroit, Michigan, United States

Atrium Health Wake Forest Baptist

Winston-Salem, North Carolina, United States

Texas Neurology

Dallas, Texas, United States

Rambam Medical Center

Haifa, Israel

Sourasky Medical Center

Tel Aviv, Israel

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT07217587), the sponsor (Janssen Research & Development, LLC), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT07217587 clinical trial studying?

The purpose of this study is to assess how well nipocalimab works when compared to efgartigimod in participants with generalized myasthenia gravis (a condition in which body's immune system mistakenly attacks and damages the connection between nerves and muscles causing muscle weakness). The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT07217587?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT07217587?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT07217587. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT07217587. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.