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Study identifier: NCT05334368 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Depemokimab in Participants With Hypereosinophilic Syndrome, Efficacy, and Safety Trial

Condition: Hypereosinophilic Syndrome  ·  Sponsor: GlaxoSmithKline

PhasePhase 3
Planned participants123
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

This is a 52-week, randomized, placebo-controlled, double-blind, parallel group, multicenter study of depemokimab in adults with uncontrolled HES receiving standard of care (SoC) therapy. The study will recruit patients with a confirmed diagnosis of HES and who are on stable HES therapy for at least 4 weeks prior to randomization (Visit 2). Eligible participants must have uncontrolled HES with a history of repeated flare (≥2 flares in the previous 12 months) and blood eosinophil count of ≥1,000 cells/ microliter (μL) during Screening. Historical HES flares are defined as documented HES-related worsening of clinical symptoms or blood eosinophil counts requiring an escalation in therapy. Participants who meet the inclusion and exclusion criteria will be randomized in a 2:1 ratio to receive either depemokimab or placebo while continuing their SoC HES therapy.

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

Talk to the study team

US GSK Clinical Trials Call Center  ·  877-379-3718  ·  GSKClinicalSupportHD@gsk.com

EU GSK Clinical Trials Call Center  ·  +44 (0) 20 89904466  ·  GSKClinicalSupportHD@gsk.com

Always discuss trial participation with your own doctor first.

Locations (92)

GSK Investigational SiteSan Diego, California, United StatesRecruiting
GSK Investigational SiteAtlanta, Georgia, United StatesCompleted
GSK Investigational SiteBoston, Massachusetts, United StatesRecruiting
GSK Investigational SiteSouthfield, Michigan, United StatesWithdrawn
GSK Investigational SiteRochester, Minnesota, United StatesWithdrawn
GSK Investigational SiteManhasset, New York, United StatesCompleted
GSK Investigational SiteCincinnati, Ohio, United StatesRecruiting
GSK Investigational SiteColumbus, Ohio, United StatesRecruiting
GSK Investigational SiteCharleston, South Carolina, United StatesRecruiting
GSK Investigational SiteNashville, Tennessee, United StatesCompleted
GSK Investigational SiteSalt Lake City, Utah, United StatesRecruiting
GSK Investigational SiteBuenos Aires, ArgentinaRecruiting

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

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Source record: clinicaltrials.gov/study/NCT05334368