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Showing 1–21 of 21 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Hydroxyurea placebo Clear all
Withdrawn Phase 2 Interventional

Risk-based Therapy for Sickle Cell Anemia: A Feasibility Study

NCT02090296
View directory record Official record
Conditions
Sickle Cell Anemia
Interventions
Hydroxyurea, Placebo
Drug · Other
Lead sponsor
Children's National Research Institute
Other
Eligibility
6 Months to 12 Months
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Oct 17, 2017 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 3 Interventional Results available

Randomized Switch Study From Hydroxyurea to Ruxolitinib for RELIEF of Polycythemia Vera Symptoms: The Relief Study

NCT01632904
View directory record Official record
Conditions
Polycythemia Vera
Interventions
Ruxolitinib, Hydroxyurea (HU), HU-placebo, Ruxolitinib-placebo
Drug
Lead sponsor
Incyte Corporation
Industry
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
51
States / cities
Scottsdale, Arizona • Fayetteville, Arkansas • Burbank, California + 48 more
Source: ClinicalTrials.gov public record
Updated Nov 13, 2017 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 2 Interventional Results available

Study to Assess Safety and Impact of SelG1 With or Without Hydroxyurea Therapy in Sickle Cell Disease Patients With Pain Crises

NCT01895361
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
SelG1, Placebo
Drug
Lead sponsor
Reprixys Pharmaceutical Corporation
Industry
Eligibility
16 Years to 65 Years
Enrollment
198 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
49
States / cities
Birmingham, Alabama • Mobile, Alabama • Little Rock, Arkansas + 46 more
Source: ClinicalTrials.gov public record
Updated Jan 30, 2020 · Synced Sep 19, 2026, 10:15 AM EDT
Terminated Phase 2 Interventional Results available

Hydroxyurea and Magnesium Pidolate to Treat People With Hemoglobin Sickle Cell Disease

NCT00532883
View directory record Official record
Conditions
Hemoglobin SC Disease
Interventions
Hydroxyurea, Magnesium Pidolate, Placebo Pills and Placebo Liquid
Drug · Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
5 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
19
States / cities
Birmingham, Alabama • Oakland, California • Sacramento, California + 14 more
Source: ClinicalTrials.gov public record
Updated Jan 17, 2013 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 3 Interventional

A Randomized, Placebo-Controlled Study of the Safety and Efficacy of Efavirenz, Didanosine, and Stavudine in Combination With or Without Hydroxyurea in Antiretroviral Naive or Experienced HIV-Infected Patients

NCT00002230
View directory record Official record
Conditions
HIV Infections
Interventions
Hydroxyurea, Efavirenz, Stavudine, Didanosine
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 2 Interventional

A Study of the Efficacy and Safety of ICA-17043 (With or Without Hydroxyurea) in Patients With Sickle Cell Anemia.

NCT00040677
View directory record Official record
Conditions
Sickle Cell Disease, Sickle Cell Anemia
Interventions
Low Dose ICA-17043, High dose ICA-17043, Placebo
Drug
Lead sponsor
Icagen
Industry
Eligibility
18 Years to 60 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2004
U.S. locations
19
States / cities
Birmingham, Alabama • Oakland, California • San Francisco, California + 16 more
Source: ClinicalTrials.gov public record
Updated Jul 17, 2011 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 1 Interventional

A Single Dose Study of the Safety, Blood Levels and Biological Effects of Aes-103 Compared to Placebo in Subjects With Stable Sickle Cell Disease

NCT01597401
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Aes-103, Placebo
Drug
Lead sponsor
Baxalta now part of Shire
Industry
Eligibility
18 Years to 65 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated May 4, 2021 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 2 Interventional

Research Study Investigating How Well NDec Works in People With Sickle Cell Disease

NCT05405114
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
NDec - oral decitabine-tetrahydrouridine, HU - Hydroxyurea, Placebo
Drug
Lead sponsor
Novo Nordisk A/S
Industry
Eligibility
18 Years and older
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
53
States / cities
Mobile, Alabama • Los Angeles, California • Oakland, California + 37 more
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 19, 2026, 10:15 AM EDT
Active, not recruiting Phase 3 Interventional Results available

Study of Two Doses of Crizanlizumab Versus Placebo in Adolescent and Adult Sickle Cell Disease Patients

NCT03814746
View directory record Official record
Conditions
Sickle Cell Disease (SCD)
Interventions
Crizanlizumab (SEG101), Placebo
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
12 Years to 100 Years
Enrollment
254 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
5
States / cities
Atlanta, Georgia • Boston, Massachusetts • Charlotte, North Carolina + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 13, 2026 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 2 Interventional Results available

Hydroxyurea to Prevent Brain Injury in Sickle Cell Disease

NCT01389024
View directory record Official record
Conditions
Sickle Cell Disease, Stroke
Interventions
Hydroxyurea, Placebo
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
12 Months to 54 Months
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2022
U.S. locations
5
States / cities
Birmingham, Alabama • Baltimore, Maryland • Kansas City, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 9, 2024 · Synced Sep 19, 2026, 10:15 AM EDT
Recruiting Phase 2Phase 3 Interventional

Study of Biomarker-Based Treatment of Acute Myeloid Leukemia

NCT03013998
View directory record Official record
Conditions
Previously Untreated Relapsed Refractory Acute Myeloid Leukemia
Interventions
Samalizumab (BAML-16-001-S1), BI 836858 (BAML-16-001-S2), Laboratory Biomarker Analysis, Daunorubicin (BAML-16-001-S1), Cytarabine (BAML-16-001-S1), Azacitidine (BAML-16-001-S2), AG-221 (BAML-16-001-S3), Azacitidine (BAML-16-001-S3), Entospletinib (BAML-16-001-S4), Azacitidine (BAML-16-001-S4), Entospletinib (BAML-16-001-S5), Decitabine (BAML-16-001-S5), Entospletinib (BAML-16-001-S6), Daunorubicin (BAML-16-001-S6), Cytarabine (BAML-16-001-S6), Pevonedistat (BAML-16-001-S9), Azacitidine (BAML-16-001-S9), AG-120 (BAML-16-001-S16), Azacitidine (BAML-16-001-S16), Gilteritinib (BAML-16-001-S8 Group 1), Decitabine (BAML-16-001-S8 Group 1), AZD5153 (BAML-16-001-S10), Venetoclax (BAML-16-001-S10), TP-0903 (BAML-16-001-S14), Decitabine (BAML-16-001-S14), Decitabine (BAML-16-001-S8 Group 2), Venetoclax (BAML-16-001-S8 Group 2), AZD5991 (BAML-16-001-S18), Azacitidine (BAML-16-001-S18), SNDX-5613 (BAML-16-001-S17), Azacitidine (BAML-16-001-S17), Venetoclax (BAML-16-001-S17), Gilteritinib (BAML-16-001-S8 Group 2), Venetoclax (BAML-16-001-S12 Arm A), Azacitidine (BAML-16-001-S12 Arm A), Venetoclax (BAML-16-001-S12 Arm B), Azacitidine (BAML-16-001-S12 Arm B), ZE46-0134 (BAML-16-001-S21 Group 1), ficlatuzumab (BAML-16-001-S24), Azacitidine (BAML-16-001-S24), Venetoclax (BAML-16-001-S24), ZE46-0134 (BAML-16-001-S21 Group 2), Bleximenib (BAML-16-001-S25/HO181), Cytarabine (BAML-16-001-S25/HO181), Daunorubicin or Idarubicin (BAML-16-001-S25/HO181), Placebo (BAML-16-001-S25/HO181), Revumenib (BAML-16-001-S26/HO177), Placebo (BAML-16-001-S26/HO177)
Biological · Other · Drug
Lead sponsor
Beat AML, LLC
Other
Eligibility
18 Years and older
Enrollment
3,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2032
U.S. locations
31
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Los Angeles, California + 26 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 2 Interventional Results available

Phase 2 Study of Montelukast for the Treatment of Sickle Cell Anemia

NCT01960413
View directory record Official record
Conditions
Sickle Cell Anemia (HbSS, or HbSβ-thalassemia0)
Interventions
Montelukast added to Hydroxyurea, Placebo added to Hydroxyurea
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
16 Years to 70 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
2
States / cities
Nashville, Tennessee • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 25, 2019 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 3 Interventional Results available

Hydroxyurea to Prevent Organ Damage in Children With Sickle Cell Anemia

NCT00006400
View directory record Official record
Conditions
Hematologic Diseases, Anemia, Sickle Cell
Interventions
Hydroxyurea, Placebo
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
9 Months to 18 Months
Enrollment
193 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2009
U.S. locations
14
States / cities
Birmingham, Alabama • Washington D.C., District of Columbia • Miami, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2020 · Synced Sep 19, 2026, 10:15 AM EDT
Active, not recruiting Phase 3 Interventional

Bomedemstat vs Hydroxyurea for Essential Thrombocythemia (MK-3543-007)

NCT06456346
View directory record Official record
Conditions
Essential Thrombocythemia
Interventions
Bomedemstat, Hydroxyurea, Bomedemstat placebo, Hydroxyurea placebo
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
22
States / cities
Glendale, Arizona • Glendale, California • Palo Alto, California + 19 more
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 1Phase 2 Interventional Results available

A Pilot Therapeutic Trial Using Hydroxyurea in Type II and Type III Spinal Muscular Atrophy Patients

NCT00568802
View directory record Official record
Conditions
Muscular Atrophy, Spinal
Interventions
Hydroxyurea, Placebo to match hydroxyurea
Drug
Lead sponsor
Stanford University
Other
Eligibility
1 Year to 10 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Oct 1, 2019 · Synced Sep 19, 2026, 10:15 AM EDT
Recruiting Phase 3 Interventional

A Study to Investigate the Efficacy and Safety of Crizanlizumab (5 mg/kg) Compared With Placebo in Adolescent and Adult Sickle Cell Disease Patients Who Experience Frequent Vaso-Occlusive Crises (SPARKLE)

NCT06439082
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Crizanlizumab, Placebo
Biological · Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
12 Years to 100 Years
Enrollment
354 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2030
U.S. locations
17
States / cities
Birmingham, Alabama • Orange, California • Washington D.C., District of Columbia + 13 more
Source: ClinicalTrials.gov public record
Updated Sep 14, 2026 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 1 Interventional Results available

Safety, Tolerability, Pharmacokinetics, And Pharmacodynamics Study Of PF-04447943, Co-Administered With And Without Hydroxyurea, In Subjects With Stable Sickle Cell Disease

NCT02114203
View directory record Official record
Conditions
Phase 1 Sickle Cell
Interventions
PDE9i, placebo for PDE9i
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
12
States / cities
Chicago, Illinois • Boston, Massachusetts • Brooklyn, New York + 2 more
Source: ClinicalTrials.gov public record
Updated Dec 13, 2017 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 1Phase 2 Interventional Results available

A Pilot Therapeutic Trial Using Hydroxyurea in Type I Spinal Muscular Atrophy Patients

NCT00568698
View directory record Official record
Conditions
Muscular Atrophy, Spinal
Interventions
Hydroxyurea, Placebo to match hydroxyurea
Drug
Lead sponsor
Stanford University
Other
Eligibility
Up to 2 Years
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2012
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Oct 1, 2019 · Synced Sep 19, 2026, 10:15 AM EDT
Terminated Phase 2 Interventional Results available

Study in Locally Advanced Squamous Cell Carcinoma of Head and Neck

NCT01133678
View directory record Official record
Conditions
Head and Neck Cancer
Interventions
Everolimus, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 89 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
2
States / cities
Chicago, Illinois • Evanston, Illinois
Source: ClinicalTrials.gov public record
Updated May 7, 2020 · Synced Sep 19, 2026, 10:15 AM EDT
Terminated Phase 2 Interventional Results available

Phase 2 Study of Ruxolitinib Versus Anagrelide in Subjects With Essential Thrombocythemia Who Are Resistant to or Intolerant of Hydroxyurea (RESET-272)

NCT03123588
View directory record Official record
Conditions
MPN (Myeloproliferative Neoplasms)
Interventions
Ruxolitinib, Anagrelide, Placebo
Drug
Lead sponsor
Incyte Corporation
Industry
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
26
States / cities
Phoenix, Arizona • Long Beach, California • Los Angeles, California + 22 more
Source: ClinicalTrials.gov public record
Updated Nov 18, 2021 · Synced Sep 19, 2026, 10:15 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Combination Chemotherapy With or Without Veliparib in Treating Patients With Stage IV Head and Neck Cancer

NCT01711541
View directory record Official record
Conditions
Head and Neck Squamous Cell Carcinoma, Stage IVA Oropharyngeal Carcinoma AJCC v7, Stage IVB Oropharyngeal Carcinoma AJCC v7
Interventions
Carboplatin, Cisplatin, Fluorouracil, Hydroxyurea, Laboratory Biomarker Analysis, Paclitaxel, Placebo Administration, Radiation Therapy, Veliparib
Drug · Other · Radiation
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2023
U.S. locations
5
States / cities
Chicago, Illinois • Evanston, Illinois • St Louis, Missouri + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 6, 2023 · Synced Sep 19, 2026, 10:15 AM EDT