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

NCT05979441 on ClinicalTrials.gov

Study listings come from ClinicalTrials.gov, where sponsors register and update their own studies. A listing does not mean a study is safe or effective, and DatenUS does not recommend any study. Talk with your doctor before joining a clinical trial, and use ClinicalTrials.gov for contact details and full eligibility rules.

Status
Enrolling by invitation
Phase
Phase 3
Interventional
Planned enrollment
240
Participants, all sites
U.S. sites
18
In 13 states

Study details

Conditions
Myositis, Active Idiopathic Inflammatory Myopathy, Dermatomyositis, Polymyositis, Immune-Mediated Necrotizing Myopathy, Antisynthetase Syndrome
Sponsor
argenx (Industry)
Ages
18 years and older
Sex
All
Healthy volunteers
Not accepted
Start
09/12/2023
Primary completion (expected)
September 2028
Last updated by sponsor
10/16/2026

Full eligibility rules, contacts and site names: NCT05979441 on ClinicalTrials.gov

Where the study has sites

Cities with at least one listed U.S. site. Some sites may not be enrolling yet.

  • Arizona: Phoenix
  • California: Beverly Hills, Orange, San Francisco
  • Connecticut: New Haven
  • Florida: Gainesville, Jacksonville, Tampa
  • Georgia: Atlanta
  • Illinois: Chicago
  • Maryland: Baltimore
  • New York: Great Neck
  • North Carolina: Chapel Hill
  • Ohio: Columbus
  • Oregon: Portland
  • Pennsylvania: Pittsburgh
  • Texas: Austin, Houston

Frequently asked questions

What does recruiting mean?
Recruiting means the study is currently enrolling participants. Not yet recruiting means it has been registered but has not started enrolling. Enrolling by invitation means participants are selected by the study team rather than through open enrollment.
How do I join a clinical trial?
Read the full eligibility criteria and contact information on ClinicalTrials.gov, then talk with your doctor about whether a study may be right for you. The study team decides who can enroll.

Source: ClinicalTrials.gov, National Library of Medicine · Last updated 10/16/2026