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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Hypereosinophilic Syndrome Clear all
Terminated Phase 3 Interventional

Phase III Long-Term Extension Study With Dexpramipexole

NCT06388889
View directory record Official record
Conditions
Eosinophilic Asthma
Interventions
Dexpramipexole Dihydrochloride
Drug
Lead sponsor
Areteia Therapeutics
Industry
Eligibility
18 Years to 99 Years
Enrollment
509 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
23
States / cities
Bakersfield, California • Northridge, California • Coral Gables, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated Dec 14, 2025 · Synced Jul 23, 2026, 10:14 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety Study of Mepolizumab Adjunctive Therapy in Participants With Severe Eosinophilic Asthma on Markers of Asthma Control

NCT02281318
View directory record Official record
Conditions
Asthma
Interventions
Mepolizumab, Placebo, SOC
Biological · Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
12 Years and older
Enrollment
556 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
24
States / cities
Birmingham, Alabama • Fresno, California • Long Beach, California + 20 more
Source: ClinicalTrials.gov public record
Updated Aug 5, 2018 · Synced Jul 23, 2026, 10:14 AM EDT
Terminated Phase 3 Interventional

A Study to Assess the Effect of Dexpramipexole in Adolescents and Adults With Severe Eosinophilic Asthma (EXHALE-3)

NCT05813288
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 Jul 23, 2026, 10:14 AM EDT
Recruiting Phase 3 Interventional

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

NCT05334368
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 Jul 23, 2026, 10:14 AM EDT
Completed No phase listed Observational

TrinetX Study of Hypereosinophilic Syndrome (HES) Without an Identifiable Non-haematological Secondary Cause

NCT06172751
View directory record Official record
Conditions
Hypereosinophilic Syndrome (HES)
Interventions
no intervention
Other
Lead sponsor
AstraZeneca
Industry
Eligibility
Not listed
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 11, 2025 · Synced Jul 23, 2026, 10:14 AM EDT
Completed Phase 3 Interventional Results available

Study in Pediatrics With HypEREosinophilic Syndrome (SPHERE)

NCT04965636
View directory record Official record
Conditions
Hypereosinophilic Syndrome
Interventions
Mepolizumab
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
6 Years to 17 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
4
States / cities
Rochester, Minnesota • Cincinnati, Ohio • Cleveland, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Jul 23, 2026, 10:14 AM EDT
Completed Not applicable Interventional Results available

Therapy of HES, PV, Atypical Chronic Myelocytic Leukemia (CML) or Chronic Myelomonocytic Leukemia (CMML), and Mastocytosis With Imatinib Mesylate

NCT00038675
View directory record Official record
Conditions
Chronic Myelomonocytic Leukemia, Chronic Myeloid Leukemia, Polycythemia Vera, Hypereosinophilic Syndrome, Mastocytosis
Interventions
Imatinib Mesylate (Gleevec)
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Not listed
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2013
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 3, 2022 · Synced Jul 23, 2026, 10:14 AM EDT
Completed Phase 4 Interventional Results available

BURAN: Benralizumab on Airway Dynamics in Severe Eosinophilic Asthma Using Functional Respiratory Imaging

NCT05552508
View directory record Official record
Conditions
Asthma
Interventions
Benralizumab
Combination Product
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 70 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
10
States / cities
Walnut Creek, California • Loxahatchee Groves, Florida • Plantation, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Mar 24, 2025 · Synced Jul 23, 2026, 10:14 AM EDT
Not listed Phase 2 Interventional

Study to Evaluate Safety and Efficacy of Dexpramipexole (KNS-760704) in Subjects With Hypereosinophilic Syndrome

NCT02101138
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 Jul 23, 2026, 10:14 AM EDT
Completed Phase 4 Interventional Results available

Omalizumab to Mepolizumab Switch Study in Severe Eosinophilic Asthma Patients

NCT02654145
View directory record Official record
Conditions
Asthma
Interventions
Mepolizumab 100mg SC, Albuterol/salbutamol MDIs, Omalizumab
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
12 Years and older
Enrollment
145 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
13
States / cities
Birmingham, Alabama • Riverside, California • Roseville, California + 10 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2019 · Synced Jul 23, 2026, 10:14 AM EDT
Completed Phase 3 Interventional Results available

A Phase 3a, Repeat Dose, Open-label, Long-term Safety Study of Mepolizumab in Asthmatic Subjects

NCT02135692
View directory record Official record
Conditions
Asthma
Interventions
Mepolizumab, SOC
Biological · Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
12 Years and older
Enrollment
339 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
16
States / cities
Newport Beach, California • Riverside, California • Rolling Hills Estates, California + 13 more
Source: ClinicalTrials.gov public record
Updated Dec 2, 2019 · Synced Jul 23, 2026, 10:14 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety Study of Mepolizumab in Subjects With Severe Hypereosinophilic Syndrome (HES)

NCT02836496
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 Jul 23, 2026, 10:14 AM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Efficacy and Safety of Reslizumab (3.0 mg/kg) in the Reduction of Clinical Asthma Exacerbations in Patients (12-75 Years of Age) With Eosinophilic Asthma

NCT01287039
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 Jul 23, 2026, 10:14 AM EDT
Completed No phase listed Observational Results available

Changes in Gene Transcription and Immunophenotypes Following Mepolizumab Treatment for Asthma

NCT05002621
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 Jul 23, 2026, 10:14 AM EDT
Terminated Phase 3 Interventional Results available

Open-Label Extension Study to Evaluate the Long-Term Safety and Efficacy of Reslizumab (3.0 mg/kg) as Treatment for Patients (12 Through 75 Years of Age) With Eosinophilic Asthma

NCT01290887
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 Jul 23, 2026, 10:14 AM EDT
Active, not recruiting Phase 2 Interventional

Tyrosine Kinase Inhibition to Treat Myeloid Hypereosinophilic Syndrome

NCT00044304
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 Jul 23, 2026, 10:14 AM EDT
Active, not recruiting Phase 3 Interventional

A Study to Assess the Effect of Dexpramipexole in Adolescents and Adults With Eosinophilic Asthma

NCT05748600
View directory record Official record
Conditions
Eosinophilic Asthma, Asthma; Eosinophilic, Asthma Attack
Interventions
Dexpramipexole Dihydrochloride, Placebo
Drug
Lead sponsor
Areteia Therapeutics
Industry
Eligibility
12 Years to 99 Years
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
146
States / cities
Chandler, Arizona • Peoria, Arizona • Surprise, Arizona + 123 more
Source: ClinicalTrials.gov public record
Updated Sep 4, 2025 · Synced Jul 23, 2026, 10:14 AM EDT
Completed Phase 3 Interventional Results available

Cessation Versus Continuation of Long-term Mepolizumab in Severe Eosinophilic Asthma Patients

NCT02555371
View directory record Official record
Conditions
Asthma
Interventions
Mepolizumab 100mg, Placebo
Biological · Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
12 Years and older
Enrollment
306 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
13
States / cities
Long Beach, California • Riverside, California • Denver, Colorado + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 4, 2020 · Synced Jul 23, 2026, 10:14 AM EDT
Completed Phase 3 Interventional Results available

Study to Evaluate the Efficacy and Safety of Reslizumab Treatment in Patients With Moderate to Severe Asthma

NCT01508936
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 Jul 23, 2026, 10:14 AM EDT
Completed Phase 2 Interventional

2-Chlorodeoxyadenosine and Cytarabine in Patients With Idiopathic Hypereosinophilic Syndrome (HES)

NCT00483067
View directory record Official record
Conditions
Leukemia
Interventions
2-CdA, Ara-C, G-CSF (Granulocyte colony-stimulating factor)
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Up to 76 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2008
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 1, 2012 · Synced Jul 23, 2026, 10:14 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional

Azacitidine, Venetoclax, and Pevonedistat in Treating Patients With Newly Diagnosed Acute Myeloid Leukemia

NCT03862157
View directory record Official record
Conditions
Acute Myeloid Leukemia, Atypical Chronic Myeloid Leukemia, BCR-ABL1 Negative, Chronic Eosinophilic Leukemia, Not Otherwise Specified, Chronic Myelomonocytic Leukemia, Chronic Neutrophilic Leukemia, Essential Thrombocythemia, Myelodysplastic Syndrome, Myelodysplastic/Myeloproliferative Neoplasm With Ring Sideroblasts and Thrombocytosis, Myelodysplastic/Myeloproliferative Neoplasm, Unclassifiable, Myeloid Neoplasm, Myeloproliferative Neoplasm, Myeloproliferative Neoplasm, Unclassifiable, Overt Primary Myelofibrosis, Polycythemia Vera, Polycythemia Vera, Post-Polycythemic Myelofibrosis Phase, Prefibrotic/Early Primary Myelofibrosis
Interventions
Azacitidine, Pevonedistat, Venetoclax
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 15, 2026 · Synced Jul 23, 2026, 10:14 AM EDT
Completed Phase 2 Interventional

Anti-Interleukin-5 Antibody to Treat Hypereosinophilic Syndrome

NCT00017862
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 Jul 23, 2026, 10:14 AM EDT
Completed Phase 2 Interventional Results available

Pharmacokinetics and Pharmacodynamics of Mepolizumab Administered Subcutaneously in Children

NCT02377427
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 Jul 23, 2026, 10:14 AM EDT
Active, not recruiting Phase 3 Interventional Results available

A Phase III Study to Evaluate the Efficacy and Safety of Benralizumab in Patients With Hypereosinophilic Syndrome (HES)

NCT04191304
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 Jul 9, 2026 · Synced Jul 23, 2026, 10:14 AM EDT