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Study identifier: NCT05979441 Synced from ClinicalTrials.gov · August 06, 2026
● Study status: Enrolling By Invitation

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

Condition: Myositis · Active Idiopathic Inflammatory Myopathy · Dermatomyositis  ·  Sponsor: argenx

PhasePhase 3
Planned participants240
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

The main purpose of this study is to measure the long-term safety and tolerability of efgartigimod PH20 SC in adult participants with Idiopathic Inflammatory Myopathy (IIM) who previously participated in ARGX-113-2007. The study consists of a treatment period where participants will receive efgartigimod PH20 SC for up to 51 months. The treatment period will be followed by a treatment-free safety follow-up period of 56 days.

This description comes directly from the study's public registry record.

Talk to the study team

No contact information is available for this study as per the public registry record.

Always discuss trial participation with your own doctor first.

Locations (92)

Neuromuscular Clinical and Research Center - NeurologyPhoenix, Arizona, United States
Attune Health Research, IncBeverly Hills, California, United States
UCI Health - ALS and Neuromuscular Center - NeurologyOrange, California, United States
UCSF Health - ALS and Neurodegenerative Disease Center - DermatologySan Francisco, California, United States
Yale Cancer Center-Yale University School Of MedicineNew Haven, Connecticut, United States
UF Health - Rheumatology Medical Specialties Medical PlazaGainesville, Florida, United States
Mayo Clinic - Florida - NeurologyJacksonville, Florida, United States
University of South Florida (USF) - Morsani Center (USF Health Carol and Frank Morsani Center for Advanced Healthcare)Tampa, Florida, United States
Emory Healthcare - Emory Clinic - RheumatologyAtlanta, Georgia, United States
Northwestern Medicine - Northwestern Memorial HospitalChicago, Illinois, United States
John Hopkins Medicine - Johns Hopkins Myositis CenterBaltimore, Maryland, United States
Northwell Health Physician Partners RheumatologyGreat Neck, New York, United States

+ 80 more locations — full list on the registry record.

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