{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=chemoprevention&page=5",
    "query": {
      "intervention": "chemoprevention",
      "page": 5
    },
    "page_size": 10
  },
  "pagination": {
    "page": 5,
    "page_size": 10,
    "total_count": 142,
    "total_pages": 15,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=chemoprevention&page=6&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=chemoprevention&page=4&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-08T16:38:05.502Z",
  "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": "NCT00363805",
      "title": "Green Tea or Polyphenon E in Preventing Lung Cancer in Former Smokers With Chronic Obstructive Pulmonary Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Lung Cancer Prevention"
      ],
      "interventions": [
        {
          "name": "green tea",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Polyphenon E",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Sherry Chow",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "40 Years to 80 Years"
      },
      "enrollment_count": 178,
      "start_date": "2004-05",
      "completion_date": null,
      "has_results": true,
      "last_update_posted_date": "2013-11-28",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 3,
      "location_summary": "Tucson, Arizona",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00363805"
    },
    {
      "nct_id": "NCT04334148",
      "title": "Healthcare Worker Exposure Response and Outcomes of Hydroxychloroquine",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "Hydroxychloroquine",
          "type": "DRUG"
        },
        {
          "name": "Placebo oral tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Adrian Hernandez",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1360,
      "start_date": "2020-04-22",
      "completion_date": "2021-01-09",
      "has_results": true,
      "last_update_posted_date": "2021-10-12",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 34,
      "location_summary": "Aurora, Colorado • Gainesville, Florida • Jacksonville, Florida + 27 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Leesburg",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04334148"
    },
    {
      "nct_id": "NCT03828474",
      "title": "Sickness Evaluation at Altitude With Acetazolamide at Relative Doses",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Acute Mountain Sickness"
      ],
      "interventions": [
        {
          "name": "Acetazolamide Pill",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 108,
      "start_date": "2019-08-09",
      "completion_date": "2019-09-29",
      "has_results": false,
      "last_update_posted_date": "2019-10-22",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 1,
      "location_summary": "Bishop, California",
      "locations": [
        {
          "city": "Bishop",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03828474"
    },
    {
      "nct_id": "NCT00847912",
      "title": "CSP #562 - The VA Keratinocyte Carcinoma Chemoprevention Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Carcinoma, Basal Cell",
        "Carcinoma, Squamous Cell",
        "Skin Neoplasms",
        "Skin Diseases",
        "Neoplasms, Basal Cell",
        "Neoplasms, Squamous Cell",
        "Carcinoma"
      ],
      "interventions": [
        {
          "name": "5-fluorouracil",
          "type": "DRUG"
        },
        {
          "name": "Placebo, vehicle control",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 954,
      "start_date": "2009-06-26",
      "completion_date": "2016-07-30",
      "has_results": true,
      "last_update_posted_date": "2021-06-11",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 13,
      "location_summary": "Palo Alto, California • San Diego, California • Denver, Colorado + 10 more",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Bay Pines",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00847912"
    },
    {
      "nct_id": "NCT00055978",
      "title": "Celecoxib in Preventing Lung Cancer in Former Heavy Smokers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Lung Cancer"
      ],
      "interventions": [
        {
          "name": "celecoxib",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "45 Years and older"
      },
      "enrollment_count": 112,
      "start_date": "2002-10",
      "completion_date": "2009-05",
      "has_results": false,
      "last_update_posted_date": "2011-06-20",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00055978"
    },
    {
      "nct_id": "NCT00001378",
      "title": "A Pilot Trial of Tamoxifen and 4-HPR (4-N-Hydroxyphenyl Retinamide) in Persons at High Risk for Developing Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Breast Cancer",
        "Breast Neoplasms"
      ],
      "interventions": [
        {
          "name": "fenretinide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 75,
      "start_date": "1994-01",
      "completion_date": "2000-11",
      "has_results": false,
      "last_update_posted_date": "2008-03-04",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00001378"
    },
    {
      "nct_id": "NCT02169284",
      "title": "Erlotinib Hydrochloride in Treating Patients With Bladder Cancer Undergoing Surgery",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Bladder Carcinoma",
        "Recurrent Bladder Carcinoma"
      ],
      "interventions": [
        {
          "name": "Erlotinib Hydrochloride",
          "type": "DRUG"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Pharmacological Study",
          "type": "OTHER"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Therapeutic Conventional Surgery",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2014-10-01",
      "completion_date": "2018-03-30",
      "has_results": true,
      "last_update_posted_date": "2020-07-07",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 6,
      "location_summary": "Baltimore, Maryland • Burlington, Massachusetts • Rochester, New York + 3 more",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Burlington",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester",
          "state": "New York"
        },
        {
          "city": "Myrtle Beach",
          "state": "South Carolina"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02169284"
    },
    {
      "nct_id": "NCT00295100",
      "title": "Tamoxifen-MRI Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Tamoxifen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "25 Years to 45 Years · Female only"
      },
      "enrollment_count": 78,
      "start_date": "2000-09",
      "completion_date": "2006-07",
      "has_results": false,
      "last_update_posted_date": "2007-06-21",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 6,
      "location_summary": "Los Angeles, California • Boston, Massachusetts • Detroit, Michigan + 2 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00295100"
    },
    {
      "nct_id": "NCT00006101",
      "title": "Eflornithine in Treating Patients At High Risk of Developing Prostate Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "eflornithine",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Thomas E. Ahlering",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "70 Years",
        "sex": "MALE",
        "summary": "35 Years to 70 Years · Male only"
      },
      "enrollment_count": 76,
      "start_date": "1998-10",
      "completion_date": "2012-12",
      "has_results": true,
      "last_update_posted_date": "2018-05-14",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 1,
      "location_summary": "Orange, California",
      "locations": [
        {
          "city": "Orange",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00006101"
    },
    {
      "nct_id": "NCT01265953",
      "title": "Chemoprevention of Prostate Cancer, HDAC Inhibition and DNA Methylation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Prostate Cancer Prevention"
      ],
      "interventions": [
        {
          "name": "SFN-rich broccoli sprout extract capsules",
          "type": "DRUG"
        },
        {
          "name": "Gelatin capsule containing microcrystalline cellulose.",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Portland VA Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "21 Years and older · Male only"
      },
      "enrollment_count": 98,
      "start_date": "2011-07",
      "completion_date": "2015-12",
      "has_results": true,
      "last_update_posted_date": "2019-05-01",
      "last_synced_at": "2026-10-08T16:38:05.502Z",
      "location_count": 2,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        },
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01265953"
    }
  ]
}