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Showing 1–24 of 53 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Hypereosinophilic Syndromes Clear all
Recruiting Phase 2 Interventional

Dupilumab as Add-On Therapy for Hypereosinophilic Syndrome With Partial Clinical Response to Eosinophil-Depleting Biologic Agents

NCT06477653
View directory record Official record
Conditions
Hypereosinophilic Syndrome
Interventions
dupilumab
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 99 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

A Longitudinal Study of Familial Hypereosinophilia (FE): Natural History and Markers of Disease Progression

NCT00091871
View directory record Official record
Conditions
Eosinophilia, Hypereosinophilic Syndrome
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
1 Year to 100 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 3 Interventional Results available

Study of Mepolizumab Autoinjector in Asthmatics

NCT03099096
View directory record Official record
Conditions
Asthma
Interventions
Mepolizumab
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
12 Years and older
Enrollment
159 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
16
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Los Angeles, California + 13 more
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Sep 29, 2026, 6:59 PM EDT
Not yet recruiting Phase 1 Interventional Accepts healthy volunteers

Nasal Inflammation Following Endotoxin Challenge in Patients With Asthma

NCT06270576
View directory record Official record
Conditions
Asthma; Eosinophilic, Asthma
Interventions
Lipopolysaccharides
Drug
Lead sponsor
National Jewish Health
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 20, 2024 · Synced Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM EDT
Active, not recruiting Phase 2 Interventional

Ruxolitinib in Treating Patients With Hypereosinophilic Syndrome or Primary Eosinophilic Disorders

NCT03801434
View directory record Official record
Conditions
BCR-JAK2 Fusion Protein Expression, Blasts 20 Percent or Less of Peripheral Blood White Cells, Blasts More Than 5 Percent of Bone Marrow Nucleated Cells, Blasts More Than 5 Percent of Peripheral Blood White Cells, Blasts Under 20 Percent of Bone Marrow Nucleated Cells, Chronic Eosinophilic Leukemia, Not Otherwise Specified, Eosinophilia, Hepatomegaly, Hypereosinophilic Syndrome, JAK2 Gene Mutation, Splenomegaly, TEL-JAK2 Fusion Protein Expression
Interventions
Ruxolitinib
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2029
U.S. locations
4
States / cities
Palo Alto, California • Portland, Oregon • Salt Lake City, Utah + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM EDT
Completed Phase 1Phase 2 Interventional

Anti-Interleukin-5 (IL-5) Study for Hypereosinophilic Syndrome

NCT00266565
View directory record Official record
Conditions
Hypereosinophilic Syndromes, Eosinophilic Gastroenteritis, Churg-Strauss Syndrome, Eosinophilic Esophagitis
Interventions
Mepolizumab
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2005
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 28, 2020 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 1Phase 2 Interventional Results available

A Study of Oral AMN107 in Adults With Chronic Myelogenous Leukemia (CML) or Other Hematologic Malignancies

NCT00109707
View directory record Official record
Conditions
Chronic Myelogenous Leukemia, Acute Lymphoblastic Leukemia (Philadelphia Chromosome Positive), Hypereosinophilic Syndrome, Systemic Mastocytosis
Interventions
Nilotinib
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
507 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
24
States / cities
Duarte, California • Stanford, California • Aurora, Colorado + 20 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2021 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 2 Interventional Results available

GB001 in Adult Subjects With Moderate to Severe Asthma

NCT03683576
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 Sep 29, 2026, 6:59 PM EDT
Completed Phase 4 Interventional Results available

Steroid Treatment for Hypereosinophilic Syndrome

NCT01524536
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 Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Efficacy and Safety of Reslizumab (0.3 or 3.0 mg/kg) as Treatment for Patients (12-75 Years of Age) With Eosinophilic Asthma

NCT01270464
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
315 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
26
States / cities
Anaheim, California • Fountain Valley, California • Los Angeles, California + 21 more
Source: ClinicalTrials.gov public record
Updated Jun 5, 2016 · Synced Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM EDT
Recruiting Phase 3 Interventional

Roll-over Study for Participants Who Have Completed a Previous Clinical Study With Benralizumab (Fasenra) and Benefit From Continued Treatment

NCT07444567
View directory record Official record
Conditions
Asthma, Eosinophilic Granulomatosis With Polyangiitis (EGPA), Hypereosinophilic Syndrome (HES)
Interventions
Benralizumab
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
6 Years and older
Enrollment
230 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
8
States / cities
Aurora, Colorado • Bethesda, Maryland • Ann Arbor, Michigan + 5 more
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Sep 29, 2026, 6:59 PM 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 Sep 29, 2026, 6:59 PM EDT