{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Hydrochlorothiazide+12.5mg",
    "query": {
      "intervention": "Hydrochlorothiazide 12.5mg"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-08T10:34:40.468Z",
  "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": "NCT00239538",
      "title": "SMOOTH - Blood Pressure Control in Diabetic/Obese Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hypertension",
        "Diabetes Mellitus, Type 2"
      ],
      "interventions": [
        {
          "name": "telmisartan combined with hydrochlorothiazide (80/12.5 mg)",
          "type": "DRUG"
        },
        {
          "name": "valsartan combined with hydrochlorothiazide (160/12.5mg)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Boehringer Ingelheim",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "30 Years and older"
      },
      "enrollment_count": 840,
      "start_date": "2003-01",
      "completion_date": "2004-12",
      "has_results": false,
      "last_update_posted_date": "2013-11-08",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 60,
      "location_summary": "Birmingham, Alabama • Huntsville, Alabama • Mobile, Alabama + 47 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Glendale",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00239538"
    },
    {
      "nct_id": "NCT00273299",
      "title": "Valsartan/Hydrochlorothiazide Combination in the Treatment of Severe Hypertension",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "valsartan plus hydrochlorothiazide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 607,
      "start_date": "2005-11",
      "completion_date": "2006-07",
      "has_results": false,
      "last_update_posted_date": "2011-11-08",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 1,
      "location_summary": "East Hanover, New Jersey",
      "locations": [
        {
          "city": "East Hanover",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00273299"
    },
    {
      "nct_id": "NCT00006294",
      "title": "Genetics of Hypertension Associated Treatments (GenHAT)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cardiovascular Diseases",
        "Heart Diseases",
        "Hypertension",
        "Coronary Disease",
        "Myocardial Infarction"
      ],
      "interventions": [
        {
          "name": "Chlorthalidone",
          "type": "DRUG"
        },
        {
          "name": "Lisinopril",
          "type": "DRUG"
        },
        {
          "name": "Amlodipine",
          "type": "DRUG"
        },
        {
          "name": "Doxazosin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Donna Arnett, 257-5678",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "55 Years and older"
      },
      "enrollment_count": 37939,
      "start_date": "1999-09",
      "completion_date": "2005-08",
      "has_results": false,
      "last_update_posted_date": "2024-04-26",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 1,
      "location_summary": "Lexington, Kentucky",
      "locations": [
        {
          "city": "Lexington",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00006294"
    },
    {
      "nct_id": "NCT01103245",
      "title": "Aldosterone and the Metabolic Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Metabolic Diseases",
        "Diabetes Mellitus",
        "Endocrine System Diseases",
        "Glucose Metabolism Disorders"
      ],
      "interventions": [
        {
          "name": "Hydrochlorothiazide (HCTZ)",
          "type": "DRUG"
        },
        {
          "name": "Aliskiren 150 mg (ALI 150)",
          "type": "DRUG"
        },
        {
          "name": "Spironolactone (SPL 25)",
          "type": "DRUG"
        },
        {
          "name": "Aliskiren 300 mg (ALI 300)",
          "type": "DRUG"
        },
        {
          "name": "Spironolactone 50 mg (SPL 50)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "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": 69,
      "start_date": "2010-03",
      "completion_date": "2013-09",
      "has_results": true,
      "last_update_posted_date": "2018-11-05",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01103245"
    },
    {
      "nct_id": "NCT01692301",
      "title": "Study of the Safety and Efficacy of LCZ696 on Arterial Stiffness in Elderly Patients With Hypertension",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "LCZ696",
          "type": "DRUG"
        },
        {
          "name": "Olmesartan",
          "type": "DRUG"
        },
        {
          "name": "LCZ696 matching placebo",
          "type": "DRUG"
        },
        {
          "name": "Olmesartan matching placebo",
          "type": "DRUG"
        },
        {
          "name": "amlodipine",
          "type": "DRUG"
        },
        {
          "name": "hydrochlorothiazide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "60 Years and older"
      },
      "enrollment_count": 454,
      "start_date": "2012-12",
      "completion_date": "2015-04",
      "has_results": true,
      "last_update_posted_date": "2016-05-04",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 11,
      "location_summary": "Clearwater, Florida • Chicago, Illinois • Baltimore, Maryland + 8 more",
      "locations": [
        {
          "city": "Clearwater",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Belzoni",
          "state": "Mississippi"
        },
        {
          "city": "Jackson",
          "state": "Mississippi"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01692301"
    },
    {
      "nct_id": "NCT01748123",
      "title": "EBMtrialcentral- Comparing Initial Diuretic Therapies Using a Collaborative Network",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Chlorthalidone",
          "type": "DRUG"
        },
        {
          "name": "Hydrochlorothiazide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "21 Years to 90 Years"
      },
      "enrollment_count": 0,
      "start_date": "2016-08",
      "completion_date": "2018-06",
      "has_results": false,
      "last_update_posted_date": "2017-08-18",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01748123"
    },
    {
      "nct_id": "NCT04676399",
      "title": "Improving Pain Management Via Spinal Cord Stimulation and Blood Pressure Reduction",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Chronic Pain",
        "Hypertension",
        "Diuretics Drug Reactions",
        "SCS"
      ],
      "interventions": [
        {
          "name": "Hydrochlorothiazide 12.5mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Kansas Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "79 Years",
        "sex": "ALL",
        "summary": "40 Years to 79 Years"
      },
      "enrollment_count": 36,
      "start_date": "2022-02-08",
      "completion_date": "2027-12",
      "has_results": false,
      "last_update_posted_date": "2026-08-20",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 1,
      "location_summary": "Kansas City, Kansas",
      "locations": [
        {
          "city": "Kansas City",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04676399"
    },
    {
      "nct_id": "NCT00902304",
      "title": "Valsartan Intensified Primary Care Reduction of Blood Pressure Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Valsartan and hydrochlorothiazide (HCTZ) - monotherapy",
          "type": "DRUG"
        },
        {
          "name": "Valsartan and amlodipine",
          "type": "DRUG"
        },
        {
          "name": "Usual care",
          "type": "DRUG"
        },
        {
          "name": "Valsartan",
          "type": "DRUG"
        },
        {
          "name": "Valsartan and hydrochlorothiazide (HCTZ) - combination arm",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2337,
      "start_date": "2009-07",
      "completion_date": "2011-07",
      "has_results": true,
      "last_update_posted_date": "2012-12-04",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 1,
      "location_summary": "East Hanover, New Jersey",
      "locations": [
        {
          "city": "East Hanover",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00902304"
    },
    {
      "nct_id": "NCT03640221",
      "title": "Ertugliflozin Versus Hydrochlorothiazide in Reducing Sympathetic Neural Overactivity in Patients With Hypertension and Recently-diagnosed Type 2 Diabetes.",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hypertension",
        "Diabetes Mellitus, Type 2"
      ],
      "interventions": [
        {
          "name": "Ertugliflozin",
          "type": "DRUG"
        },
        {
          "name": "Hydrochlorothiazide 12.5mg",
          "type": "DRUG"
        },
        {
          "name": "Microneurography",
          "type": "DEVICE"
        },
        {
          "name": "SKNA recordings",
          "type": "OTHER"
        },
        {
          "name": "Static Handgrip",
          "type": "OTHER"
        },
        {
          "name": "Post-handgrip forearm vascular occlusion",
          "type": "OTHER"
        },
        {
          "name": "Testing of the Arterial Baroreflex Function",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE",
        "OTHER"
      ],
      "sponsor": "Cedars-Sinai Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "35 Years to 65 Years"
      },
      "enrollment_count": 0,
      "start_date": "2018-09-01",
      "completion_date": "2020-08-31",
      "has_results": false,
      "last_update_posted_date": "2020-01-14",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03640221"
    },
    {
      "nct_id": "NCT04934228",
      "title": "Mitigating the Pro-inflammatory Phenotype of Obesity",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Blood Pressure",
        "Diabetes",
        "Obesity",
        "Insulin Resistance",
        "Diuretics Drug Reactions",
        "Sympathetic Nerve Activity"
      ],
      "interventions": [
        {
          "name": "Hydrochlorothiazide 12.5Mg Tab",
          "type": "DRUG"
        },
        {
          "name": "Clonidine Pill",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Kansas Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "79 Years",
        "sex": "ALL",
        "summary": "18 Years to 79 Years"
      },
      "enrollment_count": 60,
      "start_date": "2021-07-01",
      "completion_date": "2027-08-01",
      "has_results": false,
      "last_update_posted_date": "2025-06-05",
      "last_synced_at": "2026-09-08T10:34:40.468Z",
      "location_count": 1,
      "location_summary": "Kansas City, Kansas",
      "locations": [
        {
          "city": "Kansas City",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04934228"
    }
  ]
}