{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Chlorthalidone+25+mg+daily",
    "query": {
      "intervention": "Chlorthalidone 25 mg daily"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 19,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Chlorthalidone+25+mg+daily&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-06T16:20:01.023Z",
  "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": "NCT02185417",
      "title": "Diuretic Comparison Project",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Hydrochlorothiazide (HCTZ)",
          "type": "DRUG"
        },
        {
          "name": "Chlorthalidone (CTD)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 20723,
      "start_date": "2016-06-15",
      "completion_date": "2022-12-29",
      "has_results": true,
      "last_update_posted_date": "2024-05-22",
      "last_synced_at": "2026-10-06T16:20:01.023Z",
      "location_count": 69,
      "location_summary": "Birmingham, Alabama • Anchorage, Alaska • Fayetteville, Arkansas + 64 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Fayetteville",
          "state": "Arkansas"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Fresno",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02185417"
    },
    {
      "nct_id": "NCT07238400",
      "title": "Cardiac Effects of Mineralocorticoid Receptor Antagonism After Preeclampsia",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Eplerenone 100 mg daily",
          "type": "DRUG"
        },
        {
          "name": "Chlorthalidone 25 mg daily",
          "type": "DRUG"
        },
        {
          "name": "Potassium Placebo",
          "type": "DRUG"
        },
        {
          "name": "Potassium Chloride",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 65 Years · Female only"
      },
      "enrollment_count": 90,
      "start_date": "2026-03-20",
      "completion_date": "2029-03-30",
      "has_results": false,
      "last_update_posted_date": "2026-07-10",
      "last_synced_at": "2026-10-06T16:20:01.023Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07238400"
    },
    {
      "nct_id": "NCT02030314",
      "title": "The Management of Resistant Hypertension in Kidney Transplant Patients Using Chlorthalidone",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Resistant Hypertension in Kidney Transplant Patients"
      ],
      "interventions": [
        {
          "name": "Chlorthalidone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Virginia Commonwealth University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2013-07",
      "completion_date": "2017-04-12",
      "has_results": false,
      "last_update_posted_date": "2017-06-15",
      "last_synced_at": "2026-10-06T16:20:01.023Z",
      "location_count": 1,
      "location_summary": "Richmond, Virginia",
      "locations": [
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02030314"
    },
    {
      "nct_id": "NCT00241839",
      "title": "Uric Acid and Hypertension in African Americans",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Cardiovascular Diseases",
        "Heart Diseases",
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Allopurinol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Chlorthalidone",
          "type": "DRUG"
        },
        {
          "name": "Potassium chloride",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Florida",
      "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": 150,
      "start_date": "2005-08",
      "completion_date": "2011-05",
      "has_results": true,
      "last_update_posted_date": "2013-07-26",
      "last_synced_at": "2026-10-06T16:20:01.023Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00241839"
    },
    {
      "nct_id": "NCT02100462",
      "title": "Chlorthalidone and HCTZ Impacts on Platelet Activation",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Chlorthalidone 12.5 mg",
          "type": "DRUG"
        },
        {
          "name": "Hydrochlorothiazide 25 mg",
          "type": "DRUG"
        },
        {
          "name": "Aspirin 81 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Creighton University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "19 Years and older"
      },
      "enrollment_count": 30,
      "start_date": "2014-03",
      "completion_date": "2016-12",
      "has_results": false,
      "last_update_posted_date": "2015-12-14",
      "last_synced_at": "2026-10-06T16:20:01.023Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02100462"
    },
    {
      "nct_id": "NCT06287580",
      "title": "Effects of Antihypertensive Drug Treatment on Brain Blood Flow, Cognition, and Regulation of Nervous System in Older Adults With Hypertension.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Essential Hypertension",
        "Older Adults"
      ],
      "interventions": [
        {
          "name": "chlorthalidone",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "60 Years to 85 Years"
      },
      "enrollment_count": 27,
      "start_date": "2024-08-15",
      "completion_date": "2026-02-20",
      "has_results": false,
      "last_update_posted_date": "2026-02-27",
      "last_synced_at": "2026-10-06T16:20:01.023Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06287580"
    },
    {
      "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": "2026-10-06T16:20:01.023Z",
      "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": "NCT01033071",
      "title": "Efficacy and Safety of Azilsartan Medoxomil and Chlorthalidone Compared to Olmesartan Medoxomil and Hydrochlorothiazide 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 and 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": 1071,
      "start_date": "2010-01",
      "completion_date": "2010-11",
      "has_results": true,
      "last_update_posted_date": "2012-02-07",
      "last_synced_at": "2026-10-06T16:20:01.023Z",
      "location_count": 84,
      "location_summary": "Gulf Shores, Alabama • Litchfield Park, Arizona • Mesa, Arizona + 81 more",
      "locations": [
        {
          "city": "Gulf Shores",
          "state": "Alabama"
        },
        {
          "city": "Litchfield Park",
          "state": "Arizona"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01033071"
    },
    {
      "nct_id": "NCT05293756",
      "title": "OPtimizing Technology to Improve Medication Adherence and BP Control (OPTIMA-BP)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypertension",
        "Self-Management",
        "Technology",
        "Quality of Life"
      ],
      "interventions": [
        {
          "name": "OPTIMA-BP Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Case Western Reserve University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 208,
      "start_date": "2021-02-14",
      "completion_date": "2027-05-31",
      "has_results": false,
      "last_update_posted_date": "2026-04-03",
      "last_synced_at": "2026-10-06T16:20:01.023Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05293756"
    },
    {
      "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": "2026-10-06T16:20:01.023Z",
      "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"
    }
  ]
}