{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Chlorthalidone",
    "query": {
      "intervention": "Chlorthalidone"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 46,
    "total_pages": 5,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Chlorthalidone&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-02T22:21:32.203Z",
  "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": "NCT00563901",
      "title": "Analyzing How Genetics May Affect Response to High Blood Pressure Medications",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypertension",
        "Coronary Disease",
        "Cerebrovascular Accident"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "55 Years and older"
      },
      "enrollment_count": 37939,
      "start_date": "2000-09",
      "completion_date": "2004-05",
      "has_results": false,
      "last_update_posted_date": "2014-03-04",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 2,
      "location_summary": "Minneapolis, Minnesota • Houston, Texas",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00563901"
    },
    {
      "nct_id": "NCT04519164",
      "title": "Aldosterone, the Mineralocorticoid Receptor, and Cardiovascular Disease in Obesity",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Metabolic Syndrome",
        "Hypertension",
        "Overweight and Obesity"
      ],
      "interventions": [
        {
          "name": "Eplerenone",
          "type": "DRUG"
        },
        {
          "name": "Chlorthalidone with potassium chloride",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 79,
      "start_date": "2020-12-01",
      "completion_date": "2025-09-17",
      "has_results": false,
      "last_update_posted_date": "2025-09-22",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04519164"
    },
    {
      "nct_id": "NCT00695955",
      "title": "One-Year Safety and Tolerability Study of Azilsartan Medoxomil in Participants With Essential Hypertension",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Azilsartan medoxomil with or without add-on chlorthalidone",
          "type": "DRUG"
        },
        {
          "name": "Azilsartan medoxomil with or without add-on hydrochlorothiazide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 669,
      "start_date": "2007-06",
      "completion_date": "2010-05",
      "has_results": true,
      "last_update_posted_date": "2011-04-19",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 39,
      "location_summary": "Ozark, Alabama • Tallassee, Alabama • Long Beach, California + 36 more",
      "locations": [
        {
          "city": "Ozark",
          "state": "Alabama"
        },
        {
          "city": "Tallassee",
          "state": "Alabama"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Santa Rosa",
          "state": "California"
        },
        {
          "city": "Spring Valley",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00695955"
    },
    {
      "nct_id": "NCT03325114",
      "title": "Safety and Efficacy of Chlorthalidone in Type 1 Diabetes",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Type 1 Diabetes Mellitus",
        "Hypercalciuria"
      ],
      "interventions": [
        {
          "name": "Chlorthalidone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Rochester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "12 Years to 21 Years"
      },
      "enrollment_count": 1,
      "start_date": "2019-06-28",
      "completion_date": "2020-06-01",
      "has_results": true,
      "last_update_posted_date": "2021-01-05",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03325114"
    },
    {
      "nct_id": "NCT02232880",
      "title": "Treatment of Resistant Hypertension by Prevention of T-Cell Co-Stimulation",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Abatacept",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 1,
      "start_date": "2014-08",
      "completion_date": "2015-06",
      "has_results": true,
      "last_update_posted_date": "2017-02-07",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02232880"
    },
    {
      "nct_id": "NCT06495710",
      "title": "Arterial Stiffness and Blood Pressure",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypertension",
        "Vascular Stiffness",
        "Aging"
      ],
      "interventions": [
        {
          "name": "Blood pressure treatment algorithm",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "60 Years and older"
      },
      "enrollment_count": 228,
      "start_date": "2025-05-01",
      "completion_date": "2028-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-04-13",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 3,
      "location_summary": "Birmingham, Alabama • Nashville, Tennessee • Madison, Wisconsin",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        },
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06495710"
    },
    {
      "nct_id": "NCT00846365",
      "title": "Efficacy and Safety of Azilsartan Medoxomil Plus Chlorthalidone in Participants With Moderate to Severe Hypertension",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Essential Hypertension"
      ],
      "interventions": [
        {
          "name": "Azilsartan medoxomil and chlorthalidone",
          "type": "DRUG"
        },
        {
          "name": "Olmesartan medoxomil-hydrochlorothiazide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1085,
      "start_date": "2009-03",
      "completion_date": "2010-06",
      "has_results": true,
      "last_update_posted_date": "2012-03-13",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 70,
      "location_summary": "Birmingham, Alabama • Haleyville, Alabama • Hueytown, Alabama + 67 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Haleyville",
          "state": "Alabama"
        },
        {
          "city": "Hueytown",
          "state": "Alabama"
        },
        {
          "city": "Jasper",
          "state": "Alabama"
        },
        {
          "city": "Tallassee",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00846365"
    },
    {
      "nct_id": "NCT03156634",
      "title": "A Pilot Study of the Impact of the Patient Activated Learning System (PALS) on Knowledge Acquisition, Recall, and Decision Making",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Patient Education"
      ],
      "interventions": [
        {
          "name": "PALS",
          "type": "OTHER"
        },
        {
          "name": "WebMD",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Weill Medical College of Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 118,
      "start_date": "2017-04-15",
      "completion_date": "2017-12-31",
      "has_results": false,
      "last_update_posted_date": "2019-04-23",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03156634"
    },
    {
      "nct_id": "NCT00847626",
      "title": "Efficacy and Safety of Azilsartan Medoxomil Combined With Chlorthalidone in Participants With Moderate to Severe Hypertension",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Azilsartan medoxomil and chlorthalidone",
          "type": "DRUG"
        },
        {
          "name": "Chlorthalidone",
          "type": "DRUG"
        },
        {
          "name": "Azilsartan medoxomil",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1711,
      "start_date": "2009-01",
      "completion_date": "2010-07",
      "has_results": true,
      "last_update_posted_date": "2012-02-07",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 84,
      "location_summary": "Birmingham, Alabama • Columbiana, Alabama • Tuscaloosa, Alabama + 81 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Columbiana",
          "state": "Alabama"
        },
        {
          "city": "Tuscaloosa",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00847626"
    },
    {
      "nct_id": "NCT00591773",
      "title": "Efficacy and Safety of Azilsartan Medoxomil Co-Administered With Chlorthalidone in Participants With Essential Hypertension",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Azilsartan medoxomil and chlorthalidone",
          "type": "DRUG"
        },
        {
          "name": "Chlorthalidone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 551,
      "start_date": "2007-09",
      "completion_date": "2009-03",
      "has_results": true,
      "last_update_posted_date": "2011-04-19",
      "last_synced_at": "2026-09-02T22:21:32.203Z",
      "location_count": 46,
      "location_summary": "Huntsville, Alabama • Montgomery, Alabama • Buena Park, California + 43 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Buena Park",
          "state": "California"
        },
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00591773"
    }
  ]
}