A Study to Investigate the Efficacy and Safety of Anifrolumab Administered as Subcutaneous Injection and Added to Standard of Care Compared With Placebo Added to Standard of Care in Adult Participants With Idiopathic Inflammatory Myopathies (Polymyositis and Dermatomyositis)
Key facts
- Where
- Allen, Amarillo, Ann Arbor, Atlanta, Aurora, Austin, Baltimore, Beckley, Boca Raton, Boston, Boynton Beach, Charleston, Charlotte, Cleveland, Colleyville, Denver, Durham, El Paso, Fairway, Gainesville, Galveston, Great Neck, Harlingen, Houston, Irvine, Margate, Miami, Middleburg Heights, Milwaukee, New Haven, North Richland Hills, Orlando, Palm Beach Gardens, Philadelphia, Phoenix, Pittsburgh, Plant City, Sterling Heights, Summerville, Washington D.C., and Willowbrook, United StatesSee the 41 sites
- Phase
- Phase 3
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 18 and 75 years old?
Source: NCT06455449, who can take part
Where in United States
- Allen, TexasHospital not named in the registryTaking people
- Amarillo, TexasHospital not named in the registryTaking people
- Ann Arbor, MichiganHospital not named in the registryTaking people
- Atlanta, GeorgiaHospital not named in the registryTaking people
- Aurora, ColoradoHospital not named in the registryTaking people
- Austin, TexasHospital not named in the registryTaking people
- Baltimore, MarylandHospital not named in the registryTaking people
- Beckley, West VirginiaHospital not named in the registryNo longer taking part
- Boca Raton, FloridaHospital not named in the registryTaking people
- Boston, MassachusettsHospital not named in the registryTaking people
- Boynton Beach, FloridaHospital not named in the registryNo longer taking part
- Charleston, West VirginiaHospital not named in the registryTaking people
- Charlotte, North CarolinaHospital not named in the registryNo longer taking part
- Cleveland, OhioHospital not named in the registryTaking people
- Colleyville, TexasHospital not named in the registryTaking people
- Denver, ColoradoHospital not named in the registryTaking people
- Durham, North CarolinaHospital not named in the registryTaking people
- El Paso, TexasHospital not named in the registryTaking people
- Fairway, KansasHospital not named in the registryTaking people
- Gainesville, FloridaHospital not named in the registryNo longer taking part
- Galveston, TexasHospital not named in the registryNo longer taking part
- Great Neck, New YorkHospital not named in the registryTaking people
- Harlingen, TexasHospital not named in the registryTaking people
- Houston, TexasHospital not named in the registryNo longer taking part
- Irvine, CaliforniaHospital not named in the registryTaking people
- Margate, FloridaHospital not named in the registryTaking people
- Miami, FloridaHospital not named in the registryNo longer taking part
- Middleburg Heights, OhioHospital not named in the registryNo longer taking part
- Milwaukee, WisconsinHospital not named in the registryTaking people
- New Haven, ConnecticutHospital not named in the registryTaking people
- North Richland Hills, TexasHospital not named in the registryTaking people
- Orlando, FloridaHospital not named in the registryTaking people
- Palm Beach Gardens, FloridaHospital not named in the registryTaking people
- Philadelphia, PennsylvaniaHospital not named in the registryNot yet recruiting
- Phoenix, ArizonaHospital not named in the registryNot yet recruiting
- Pittsburgh, PennsylvaniaHospital not named in the registryTaking people
- Plant City, FloridaHospital not named in the registryTaking people
- Sterling Heights, MichiganHospital not named in the registryTaking people
- Summerville, South CarolinaHospital not named in the registryTaking people
- Washington D.C., District of ColumbiaHospital not named in the registryNo longer taking part
- Willowbrook, IllinoisHospital not named in the registryTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorTrial details
- Who runs it
- AstraZeneca
- Trial code
- NCT06455449
- Record updated
- 24 September 2026
- Original description
The purpose of this multicenter, randomized, placebo-controlled and double-blind study is to evaluate the efficacy and safety of subcutaneous anifrolumab compared with placebo on the overall disease activity in participants with moderate to severe Idiopathic Inflammatory Myopathies (IIM) [polymyositis (PM) or dermatomyositis (DM)] while receiving standard of care (SoC) treatment.Read full original descriptionShow less
A Multicenter, Parallel-group, Double-blind, 2-Arm, Phase III Study to Investigate the Efficacy and Safety of Anifrolumab Administered as Subcutaneous Injection and Added to Standard of Care Compared With Placebo Added to Standard of Care in Adult Participants With Idiopathic Inflammatory Myopathies (Polymyositis and Dermatomyositis)
The purpose of this multicenter, randomized, placebo-controlled and double-blind study is to evaluate the efficacy and safety of subcutaneous anifrolumab compared with placebo on the overall disease activity in participants with moderate to severe Idiopathic Inflammatory Myopathies (IIM) [polymyositis (PM) or dermatomyositis (DM)] while receiving standard of care (SoC) treatment.
Inclusion: 18 - 75 years old; Body weight ≥40 kg; Must have "probable" or "definite" diagnosis of PM or DM according to the 2017 ACR/EULAR classification criteria for adult myositis; Moderate or severe disease activity per core set measurements; Currently receiving oral prednisone or other polymyositis or dermatomyositis treatments at a stable dose; No history of active tuberculosis or severe COVID-19; Male and female participants must follow contraception guidelines.
Exclusion: Participants with documented inclusion body myositis (IBM), immune mediation necrotizing myositis (IMNM), juvenile myositis (if diagnosed within 10 years prior to signing the ICF), drug-induced myositis, cancer associated myositis, amyopathic DM, and non inflammatory myopathies (eg, muscular dystrophies); Any clinical cytomegalovirus or Epstein-Barr virus infection that has not completely resolved within 12 weeks prior to signing the ICF; Opportunistic infection requiring hospitalization or IV antimicrobial treatment within 3 years prior to randomization; Recent or concurrent enrollment in another clinical study with an investigational product; PM and DM patients at a high risk of malignancy; Participants with rapidly progressive interstitial lung disease; Participants with severe muscle damage or permanent weakness due to non-PM or non-DM conditions (i.e. stroke) as per the investigator's opinion; Any history of severe case of herpes zoster infection; History of cancer (except adequately treated basal cell carcinoma or cervical cancer in-situ), immunodeficiency, HIV, HBV, active HCV ; Recent non-opportunistic infection requiring hospitalization or anti-infective treatment; Lactating, breastfeeding, or pregnant females or females who intend to become pregnant or begin breastfeeding.
Capable of giving informed consent.