A Study of Dazukibart for Idiopathic Inflammatory Myopathies

This study is looking at how dazukibart works in people who have active idiopathic inflammatory myopathies (IIMs), specifically dermatomyositis (DM) or polymyositis (PM). IIMs are conditions that cause inflammation and weakness in muscles, often in the hips, thighs, upper arms, and neck. DM can also cause a skin rash. This study aims to understand the safety of dazukibart by tracking any side effects, serious side effects, and laboratory changes over 52 weeks. You may be able to join if you are 18 or older and have already completed a qualifying study. The study plans to enroll 211 participants.

Study design
This is an interventional study, meaning participants will receive a specific treatment (dazukibart). It plans to enroll 211 participants.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
Participants will be followed for safety outcomes for 52 weeks.

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NCT06698796

A Study to Understand How the Study Medicine Dazukibart Works in People With Idiopathic Inflammatory Myopathies

Recruiting
PHASE3Ages 18+InterventionalTreatment
Pfizer
~211 participants
Updated 2026-08-25 on ClinicalTrials.gov
What's tested:Dazukibart

At a glance

Recruiting sites
24 of 26 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Treatment-Emergent Adverse Events (AEs), Serious AEs, AEs of Special Interest, and AEs leading to treatment discontinuation
Measured over 52 weeks
+5 more outcomes measured
Dermatomyositis
Polymyositis
26 sites across 21 states
Texas2
Jiangxi2
Shanghai Municipality2
Tokyo2
Taiwan2
Arizona1
West Virginia1
Mendoza Province1
  • Pfizer CT.gov Call Center · STUDY_DIRECTOR · Pfizer

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Eligibility criteria

Inclusion

Participants that completed a qualifying study through Week 52.

Exclusion

Any medical or psychiatric condition including recent (within the past year) or active suicidal ideation/behavior or laboratory abnormality that may increase the risk of study participation.
Previous administration with an investigational product (drug or vaccine) other than dazukibart in a qualifying study within 30 days (or as determined by the local requirement) or 5 half-lives preceding baseline in this study (whichever is longer).
Current use of any prohibited concomitant medication(s).
Active bacterial, viral, fungal, mycobacterial or other infections.
Ongoing adverse event in a qualifying study or the participant has met safety monitoring criteria in a qualifying study that have not resolved.
Investigator site staff or sponsor employees directly involved in the conduct of the study, site staff otherwise supervised by the investigator, and their respective family members.
  • Treatment-Emergent Adverse Events (AEs), Serious AEs, AEs of Special Interest, and AEs leading to treatment discontinuation52 weeks

    An AE is any untoward medical occurrence in a participant who received study treatment without regard to possibility of causal relationship. SAE is an AE resulting in any of the following outcomes or deemed significant for any other reason: death, initial or prolonged inpatient hospitalization, life-threatening experience (immediate risk of dying), persistent or significant disability or incapacity, congenital anomaly. Treatment-emergent are AEs that are absent before treatment or that worsened relative to pretreatment state. Pre-defined AESI for this study are outlined in study protocol.

  • Number of participants with clinically significant laboratory abnormalities52 weeks

    Clinically significant laboratory abnormalities are those that meet the Common Terminology Criteria for Adverse Events (CTCAE) definition.

  • Number of participants with clinically significant abnormalities in vital signs52 weeks

    Clinically significant vital sign abnormalities include pulse rate \<40, \>100 or \>120 bpm; systolic blood pressure increase from baseline ≥30 or decrease ≤30 mmHg; diastolic blood pressure increase from baseline ≥20 or decrease ≤20 mmHg.

  • Number of participants with clinically significant electrocardiogram (ECG) abnormalities52 weeks

    Clinically significant ECG abnormalities include mild (\>450-480 millisecond \[msec\]), moderate (\>480-500 msec or 30-60 msec increase from baseline), and severe (\>500 msec or \>60 msec increase from baseline) QTc prolongation.

  • Change from baseline in Forced Vital Capacity (FVC)/Diffusing Capacity of the Lungs for Carbon Monoxide (DLCO)52 weeks

    FVC is the volume of air which can be forcibly exhaled from the lungs after taking the deepest breath possible. DLCO is a measure of gas exchange diffusion capacity.

  • Absolute values and change from baseline in Columbia-Suicide Severity Rating Scale (C-SSRS)52 weeks

    C-SSRS assesses whether participant experienced following: completed suicide (1), suicide attempt (2) (response of "Yes" on "actual attempt"), preparatory acts toward imminent suicidal behavior (3)("Yes" on "preparatory acts or behavior"), suicidal ideation (4) ("Yes" on "wish to be dead", "non-specific active suicidal thoughts", "active suicidal ideation with methods without intent to act or some intent to act, without specific plan or with specific plan and intent), any suicidal behavior or ideation, self-injurious behavior (7)("Yes" on "Has subject engaged in non-suicidal self-injurious behavior").