{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Hydroxyurea+placebo",
    "query": {
      "intervention": "Hydroxyurea placebo"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 21,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Hydroxyurea+placebo&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-19T15:45:24.164Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT02090296",
      "title": "Risk-based Therapy for Sickle Cell Anemia: A Feasibility Study",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Anemia"
      ],
      "interventions": [
        {
          "name": "Hydroxyurea",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Children's National Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Months",
        "maximum_age": "12 Months",
        "sex": "ALL",
        "summary": "6 Months to 12 Months"
      },
      "enrollment_count": 0,
      "start_date": "2014-02",
      "completion_date": "2015-06",
      "has_results": false,
      "last_update_posted_date": "2017-10-18",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 1,
      "location_summary": "Washington D.C., District of Columbia",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02090296"
    },
    {
      "nct_id": "NCT01632904",
      "title": "Randomized Switch Study From Hydroxyurea to Ruxolitinib for RELIEF of Polycythemia Vera Symptoms: The Relief Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Polycythemia Vera"
      ],
      "interventions": [
        {
          "name": "Ruxolitinib",
          "type": "DRUG"
        },
        {
          "name": "Hydroxyurea (HU)",
          "type": "DRUG"
        },
        {
          "name": "HU-placebo",
          "type": "DRUG"
        },
        {
          "name": "Ruxolitinib-placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Incyte Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 110,
      "start_date": "2012-06",
      "completion_date": "2016-05",
      "has_results": true,
      "last_update_posted_date": "2017-11-14",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 51,
      "location_summary": "Scottsdale, Arizona • Fayetteville, Arkansas • Burbank, California + 48 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Fayetteville",
          "state": "Arkansas"
        },
        {
          "city": "Burbank",
          "state": "California"
        },
        {
          "city": "Glendale",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01632904"
    },
    {
      "nct_id": "NCT01895361",
      "title": "Study to Assess Safety and Impact of SelG1 With or Without Hydroxyurea Therapy in Sickle Cell Disease Patients With Pain Crises",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Disease"
      ],
      "interventions": [
        {
          "name": "SelG1",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Reprixys Pharmaceutical Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "16 Years to 65 Years"
      },
      "enrollment_count": 198,
      "start_date": "2013-07",
      "completion_date": "2016-03",
      "has_results": true,
      "last_update_posted_date": "2020-01-31",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 49,
      "location_summary": "Birmingham, Alabama • Mobile, Alabama • Little Rock, Arkansas + 46 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Oakland",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01895361"
    },
    {
      "nct_id": "NCT00532883",
      "title": "Hydroxyurea and Magnesium Pidolate to Treat People With Hemoglobin Sickle Cell Disease",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hemoglobin SC Disease"
      ],
      "interventions": [
        {
          "name": "Hydroxyurea",
          "type": "DRUG"
        },
        {
          "name": "Magnesium Pidolate",
          "type": "DRUG"
        },
        {
          "name": "Placebo Pills and Placebo Liquid",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "St. Jude Children's Research Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "5 Years and older"
      },
      "enrollment_count": 44,
      "start_date": "2007-01",
      "completion_date": "2009-08",
      "has_results": true,
      "last_update_posted_date": "2013-01-18",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 19,
      "location_summary": "Birmingham, Alabama • Oakland, California • Sacramento, California + 14 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00532883"
    },
    {
      "nct_id": "NCT00002230",
      "title": "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",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "HIV Infections"
      ],
      "interventions": [
        {
          "name": "Hydroxyurea",
          "type": "DRUG"
        },
        {
          "name": "Efavirenz",
          "type": "DRUG"
        },
        {
          "name": "Stavudine",
          "type": "DRUG"
        },
        {
          "name": "Didanosine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2005-06-24",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00002230"
    },
    {
      "nct_id": "NCT00040677",
      "title": "A Study of the Efficacy and Safety of ICA-17043 (With or Without Hydroxyurea) in Patients With Sickle Cell Anemia.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Disease",
        "Sickle Cell Anemia"
      ],
      "interventions": [
        {
          "name": "Low Dose ICA-17043",
          "type": "DRUG"
        },
        {
          "name": "High dose ICA-17043",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Icagen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 90,
      "start_date": "2002-02",
      "completion_date": "2004-01",
      "has_results": false,
      "last_update_posted_date": "2011-07-18",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 19,
      "location_summary": "Birmingham, Alabama • Oakland, California • San Francisco, California + 16 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00040677"
    },
    {
      "nct_id": "NCT01597401",
      "title": "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",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Sickle Cell Disease"
      ],
      "interventions": [
        {
          "name": "Aes-103",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Baxalta now part of Shire",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 19,
      "start_date": "2012-05-12",
      "completion_date": "2013-06-07",
      "has_results": false,
      "last_update_posted_date": "2021-05-05",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01597401"
    },
    {
      "nct_id": "NCT05405114",
      "title": "Research Study Investigating How Well NDec Works in People With Sickle Cell Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Disease"
      ],
      "interventions": [
        {
          "name": "NDec - oral decitabine-tetrahydrouridine",
          "type": "DRUG"
        },
        {
          "name": "HU - Hydroxyurea",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novo Nordisk A/S",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 96,
      "start_date": "2022-07-07",
      "completion_date": "2025-07-24",
      "has_results": false,
      "last_update_posted_date": "2026-07-22",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 53,
      "location_summary": "Mobile, Alabama • Los Angeles, California • Oakland, California + 37 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Torrance",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05405114"
    },
    {
      "nct_id": "NCT03814746",
      "title": "Study of Two Doses of Crizanlizumab Versus Placebo in Adolescent and Adult Sickle Cell Disease Patients",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Sickle Cell Disease (SCD)"
      ],
      "interventions": [
        {
          "name": "Crizanlizumab (SEG101)",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "12 Years to 100 Years"
      },
      "enrollment_count": 254,
      "start_date": "2019-07-26",
      "completion_date": "2026-11-05",
      "has_results": true,
      "last_update_posted_date": "2026-09-14",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 5,
      "location_summary": "Atlanta, Georgia • Boston, Massachusetts • Charlotte, North Carolina + 2 more",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Charlotte",
          "state": "North Carolina"
        },
        {
          "city": "Memphis",
          "state": "Tennessee"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03814746"
    },
    {
      "nct_id": "NCT01389024",
      "title": "Hydroxyurea to Prevent Brain Injury in Sickle Cell Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Disease",
        "Stroke"
      ],
      "interventions": [
        {
          "name": "Hydroxyurea",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Months",
        "maximum_age": "54 Months",
        "sex": "ALL",
        "summary": "12 Months to 54 Months"
      },
      "enrollment_count": 28,
      "start_date": "2012-08-16",
      "completion_date": "2022-05-24",
      "has_results": true,
      "last_update_posted_date": "2024-07-10",
      "last_synced_at": "2026-09-19T15:45:24.164Z",
      "location_count": 5,
      "location_summary": "Birmingham, Alabama • Baltimore, Maryland • Kansas City, Missouri + 2 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01389024"
    }
  ]
}