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ClinicalTrials.gov public records Last synced May 21, 2026, 7:40 PM EDT

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Showing 1–24 of 49 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Hypereosinophilic Syndrome Clear all
Terminated Phase 3 Interventional Results available
View directory record Official record
Conditions
Hypereosinophilic Syndrome
Interventions
mepolizumab
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 75 Years
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
10
States / cities
San Diego, California • Denver, Colorado • Bethesda, Maryland + 7 more
Source: ClinicalTrials.gov public record
Updated Jul 6, 2017 · Synced May 21, 2026, 7:40 PM EDT
Completed Phase 3 Interventional Results available
View directory record Official record
Conditions
Eosinophilic Asthma
Interventions
Reslizumab, Placebo
Drug
Lead sponsor
Teva Branded Pharmaceutical Products R&D, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
511 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
66
States / cities
Birmingham, Alabama • Homewood, Alabama • Jasper, Alabama + 58 more
Source: ClinicalTrials.gov public record
Updated Jun 26, 2016 · Synced May 21, 2026, 7:40 PM EDT
Not listed Phase 2Phase 3 Interventional Results available
View directory record Official record
Conditions
Respiratory System Agents, Anti-Asthmatic Agents, Hematologic Diseases, Leukocyte Disorders, Hypereosinophilia
Interventions
benralizumab, Placebo
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2023
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 7, 2022 · Synced May 21, 2026, 7:40 PM EDT
Terminated Phase 3 Interventional
View directory record Official record
Conditions
Eosinophilic Asthma, Asthma; Eosinophilic, Asthma
Interventions
Dexpramipexole Dihydrochloride, Placebo
Drug
Lead sponsor
Areteia Therapeutics
Industry
Eligibility
12 Years to 99 Years
Enrollment
654 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
76
States / cities
Mobile, Alabama • Chandler, Arizona • Peoria, Arizona + 64 more
Source: ClinicalTrials.gov public record
Updated Dec 14, 2025 · Synced May 21, 2026, 7:40 PM EDT
Recruiting Phase 3 Interventional
View directory record Official record
Conditions
Hypereosinophilic Syndrome
Interventions
Depemokimab, Placebo
Drug · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
123 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
11
States / cities
San Diego, California • Atlanta, Georgia • Boston, Massachusetts + 8 more
Source: ClinicalTrials.gov public record
Updated Nov 24, 2025 · Synced May 21, 2026, 7:40 PM EDT
Recruiting Phase 3 Interventional
View directory record Official record
Conditions
Asthma
Interventions
Benralizumab, Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
6 Years to 18 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2032
U.S. locations
28
States / cities
Mobile, Alabama • Montgomery, Alabama • Tucson, Arizona + 24 more
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced May 21, 2026, 7:40 PM EDT
Recruiting Phase 3 Interventional
View directory record Official record
Conditions
Eosinophilic Asthma
Interventions
ICS-LABA, benralizumab, Placebo for Benralizumab
Combination Product
Lead sponsor
AstraZeneca
Industry
Eligibility
12 Years to 75 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
34
States / cities
Chandler, Arizona • Sun City, Arizona • Tucson, Arizona + 28 more
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced May 21, 2026, 7:40 PM EDT
Completed No phase listed Observational Results available
View directory record Official record
Conditions
Eosinophilic Asthma
Interventions
Observational
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 17, 2026 · Synced May 21, 2026, 7:40 PM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Asthma
Interventions
GB001, Placebo
Drug
Lead sponsor
GB001, Inc, a wholly owned subsidiary of Gossamer Bio, Inc.
Industry
Eligibility
18 Years to 74 Years
Enrollment
481 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
47
States / cities
Birmingham, Alabama • Tucson, Arizona • Los Angeles, California + 41 more
Source: ClinicalTrials.gov public record
Updated Sep 15, 2021 · Synced May 21, 2026, 7:40 PM EDT
Terminated Phase 3 Interventional Results available
View directory record Official record
Conditions
Eosinophilic Asthma
Interventions
Reslizumab
Drug
Lead sponsor
Teva Branded Pharmaceutical Products R&D, Inc.
Industry
Eligibility
12 Years to 75 Years
Enrollment
1,052 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
48
States / cities
Scottsdale, Arizona • Anaheim, California • Fountain Valley, California + 39 more
Source: ClinicalTrials.gov public record
Updated Jun 5, 2016 · Synced May 21, 2026, 7:40 PM EDT
Completed Phase 2 Interventional Results available
View directory record Official record
Conditions
Asthma
Interventions
Mepolizumab
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
6 Years to 11 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
4
States / cities
San Diego, California • Oklahoma City, Oklahoma • Medford, Oregon + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 2, 2019 · Synced May 21, 2026, 7:40 PM EDT
Completed Phase 3 Interventional Results available
View directory record Official record
Conditions
Hypereosinophilic Syndrome
Interventions
Mepolizumab 300 mg, Placebo matching mepolizumab, Active OCS capsules (5 mg prednisolone or prednisone), Placebo matching OCS capsules
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
12 Years and older
Enrollment
108 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
7
States / cities
San Diego, California • New Haven, Connecticut • Rochester, Minnesota + 4 more
Source: ClinicalTrials.gov public record
Updated Feb 20, 2020 · Synced May 21, 2026, 7:40 PM EDT
Recruiting Phase 2 Interventional
View directory record Official record
Conditions
Eosinophilic Asthma
Interventions
KT-621, Placebo
Drug · Other
Lead sponsor
Kymera Therapeutics, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
264 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
20
States / cities
Long Beach, California • Northridge, California • Redding, California + 16 more
Source: ClinicalTrials.gov public record
Updated May 17, 2026 · Synced May 21, 2026, 7:40 PM EDT
Active, not recruiting Phase 3 Interventional
View directory record Official record
Conditions
Hypereosinophilic Syndrome
Interventions
Benralizumab, Placebo
Biological
Lead sponsor
AstraZeneca
Industry
Eligibility
12 Years to 130 Years
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
8
States / cities
La Jolla, California • Atlanta, Georgia • Bethesda, Maryland + 5 more
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced May 21, 2026, 7:40 PM EDT
Active, not recruiting Phase 2 Interventional
View directory record Official record
Conditions
Eosinophilic Myeloid Neoplasm, Hypereosinophilic Syndrome
Interventions
Imatinib, Ruxolitinib
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
2 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 15, 2026 · Synced May 21, 2026, 7:40 PM EDT
Completed Phase 3 Interventional Results available
View directory record Official record
Conditions
Eosinophilic Asthma
Interventions
Reslizumab, Placebo
Drug
Lead sponsor
Teva Branded Pharmaceutical Products R&D, Inc.
Industry
Eligibility
12 Years to 75 Years
Enrollment
489 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
26
States / cities
Scottsdale, Arizona • Los Angeles, California • Orange, California + 23 more
Source: ClinicalTrials.gov public record
Updated Nov 8, 2021 · Synced May 21, 2026, 7:40 PM EDT
Terminated Phase 2 Interventional
View directory record Official record
Conditions
Eosinophilia, Hypereosinophilic Syndrome
Interventions
Gleevec
Drug
Lead sponsor
Steven E. Coutre
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated May 9, 2021 · Synced May 21, 2026, 7:40 PM EDT
Completed Phase 3 Interventional Results available
View directory record Official record
Conditions
Eosinophilic Asthma
Interventions
Reslizumab, Placebo
Drug
Lead sponsor
Teva Branded Pharmaceutical Products R&D, Inc.
Industry
Eligibility
12 Years to 75 Years
Enrollment
464 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
15
States / cities
Mobile, Alabama • Fresno, California • Long Beach, California + 12 more
Source: ClinicalTrials.gov public record
Updated Nov 8, 2021 · Synced May 21, 2026, 7:40 PM EDT
Active, not recruiting Phase 4 Interventional
View directory record Official record
Conditions
Asthma
Interventions
Benralizumab, Placebo
Biological
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 70 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
19
States / cities
Birmingham, Alabama • Los Angeles, California • Jacksonville, Florida + 16 more
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced May 21, 2026, 7:40 PM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Severe Eosinophilic Asthma, Nasal Polyps
Interventions
FASENRA(benralizumab)
Other
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 99 Years
Enrollment
273 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
8
States / cities
Centennial, Colorado • Denver, Colorado • Glendale, New York + 5 more
Source: ClinicalTrials.gov public record
Updated Apr 18, 2023 · Synced May 21, 2026, 7:40 PM EDT
Not listed Phase 2 Interventional
View directory record Official record
Conditions
Hypereosinophilic Syndrome
Interventions
Dexpramipexole
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 6, 2017 · Synced May 21, 2026, 7:40 PM EDT
Completed Phase 4 Interventional Results available
View directory record Official record
Conditions
Eosinophilia, Hypereosinophilic Syndrome, Leukocyte Disorder, Hematologic Diseases
Interventions
prednisone
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
7 Years to 100 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2020
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 14, 2022 · Synced May 21, 2026, 7:40 PM EDT
Completed Phase 3 Interventional
View directory record Official record
Conditions
Hypereosinophilia, Hypereosinophilic Syndrome
Interventions
mepolizumab
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 75 Years
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
11
States / cities
San Diego, California • Denver, Colorado • Bethesda, Maryland + 8 more
Source: ClinicalTrials.gov public record
Updated May 4, 2020 · Synced May 21, 2026, 7:40 PM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Hypereosinophilic Syndrome
Interventions
SCH55700
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Not listed
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced May 21, 2026, 7:40 PM EDT