← Back to Clinical Trials
Recruiting Phase 3 NCT04951622

NCT04951622 A Study of Nipocalimab Administered to Adults With Generalized Myasthenia Gravis

◆ AI Clinical Summary
Plain-language summary for patients
Clinical Trial Summary
NCT ID NCT04951622
Status Recruiting
Phase Phase 3
Sponsor Janssen Research & Development, LLC
Condition Myasthenia Gravis
Study Type INTERVENTIONAL
Enrollment 199 participants
Start Date 2021-07-15
Primary Completion 2023-11-17

Eligibility & Interventions

Sex All sexes
Min Age 18 Years
Max Age N/A
Study Type INTERVENTIONAL
Interventions
NipocalimabPlaceboNipocalimab SC-LIV

Eligibility Fast-Check

Enter your details for a quick preliminary check. This does not replace medical advice.

What to Expect as a Participant

You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.

Phase 3 trials are large pivotal studies comparing the treatment to current standard of care or placebo. Your participation directly contributes to the evidence needed for regulatory approval.

This trial targets 199 participants in total. It began in 2021-07-15 with a primary completion date of 2023-11-17.

⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.

Brief Summary

The purpose of this study is to evaluate the efficacy and safety of nipocalimab compared to placebo in participants with generalized myasthenia gravis (gMG). The purpose of the subcutaneous substudy is to evaluate how well it works in the body (pharmacodynamic \[PD\]) when given as an injection under the skin (subcutaneous) compared to when given through a vein (intravenous) in participants with gMG.

Eligibility Criteria

Inclusion Criteria: * Diagnosis of myasthenia gravis (MG) with generalized muscle weakness meeting the clinical criteria for generalized myasthenia gravis (gMG) as defined by the Myasthenia Gravis Foundation of America (MGFA) Clinical Classification Class II a/b, III a/b, or IVa/b at screening * Myasthenia Gravis - Activities of Daily Living (MG-ADL) score of greater than or equal to (\>=) 6 at screening and baseline * Has sufficient venous access to allow drug administration by infusion and blood sampling as per the protocol * A woman of childbearing potential must have a negative highly sensitive serum (beta-human chorionic gonadotropin \[beta-hCG\]) at screening and a negative urine pregnancy test at Day 1 prior to administration of study intervention * A male participant must agree not to donate sperm for the purpose of reproduction during the study and for a minimum 90 days after receiving the last administration of study intervention * For the SC Substudy (Cohort 1 and Cohort 2): Has reasonable abdominal skin area for SC administration * For the SC Substudy (Cohort 1 and Cohort 2): Participants must be willing to comply with maintaining their stable dose of corticosteroids and/or immunosuppressants for the initial 8 weeks of the SC substudy, that is, through the SC Week 8 visit Exclusion Criteria: * Has 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 * Has MGFA Class I disease or presence of MG crisis (MGFA Class V) at screening, history of MG crisis within 1 month of screening, or fixed weakness (and/or 'burnt out' MG) * Has had a thymectomy within 12 months prior to screening, or thymectomy is planned during the study * Has known allergies, hypersensitivity, or intolerance to nipocalimab or its excipients * Has experienced myocardial infarction, unstable ischemic heart disease, or stroke within 12 weeks of screening * For the SC Substudy (Cohort 1): Participants who have undergone a recent tapering of their concomitant MG medication in the OLE * For the SC Substudy (Cohort 1): Participants deteriorating during the OLE in the month prior to SC Dose 1 of the SC substudy such that they meet the criteria for clinical deterioration * For the SC Substudy (Cohort 2): History of an unprovoked pulmonary embolism within 1 year prior to screening or history of recurrent deep vein thrombosis (DVT)

Contact & Investigator

Central Contact

Study Contact

✉ Participate-In-This-Study1@its.jnj.com

📞 844-434-4210

Principal Investigator

Janssen Research & Development, LLC Clinical Trial

STUDY DIRECTOR

Janssen Research & Development, LLC

Frequently Asked Questions

Who can join the NCT04951622 clinical trial?

This trial is open to participants of all sexes, aged 18 Years or older, studying Myasthenia Gravis. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.

What phase is the NCT04951622 trial and what does that mean for participants?

Phase 3 trials are large-scale studies comparing the new treatment to existing standards of care or a placebo. They provide the evidence needed for regulatory approval. This trial targets 199 participants.

Is NCT04951622 currently recruiting?

Yes, NCT04951622 is actively recruiting participants. Contact the research team at Participate-In-This-Study1@its.jnj.com for enrollment information.

Where is the NCT04951622 trial being conducted?

This trial is being conducted at Paradise Valley, United States, Scottsdale, United States, Los Angeles, United States, Palo Alto, United States and 11 additional locations.

Who is sponsoring the NCT04951622 clinical trial?

NCT04951622 is sponsored by Janssen Research & Development, LLC. The principal investigator is Janssen Research & Development, LLC Clinical Trial at Janssen Research & Development, LLC. The trial plans to enroll 199 participants.

Related Trials

ClinicalMetric — Independent clinical trial intelligence platform. Not affiliated with NIH, ClinicalTrials.gov, the U.S. FDA, or any pharmaceutical company, hospital, or clinical research organization. Trial data is sourced from ClinicalTrials.gov for informational purposes only and does not constitute medical advice. Do not make any treatment, enrollment, or health decisions based solely on information found here — always consult a qualified healthcare professional. Full Disclaimer  ·  Last Reviewed: April 2026  ·  Data Methodology