{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Tamoxifen",
    "query": {
      "intervention": "Tamoxifen"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 289,
    "total_pages": 29,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Tamoxifen&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-07T17:46:06.457Z",
  "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": "NCT05645536",
      "title": "Safety Extension Study for Subjects With HR+, HER2- Breast Cancer for Subjects Who Have Completed the OVELIA Study",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "TOL2506",
          "type": "DRUG"
        },
        {
          "name": "Tamoxifen",
          "type": "DRUG"
        },
        {
          "name": "Letrozole tablets",
          "type": "DRUG"
        },
        {
          "name": "Anastrozole Tablets",
          "type": "DRUG"
        },
        {
          "name": "Exemestane Tablets",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Tolmar Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "51 Years",
        "sex": "ALL",
        "summary": "18 Years to 51 Years"
      },
      "enrollment_count": 250,
      "start_date": "2022-12-28",
      "completion_date": "2030-03",
      "has_results": false,
      "last_update_posted_date": "2026-09-01",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 17,
      "location_summary": "Greenbrae, California • Fort Lauderdale, Florida • Lexington, Kentucky + 14 more",
      "locations": [
        {
          "city": "Greenbrae",
          "state": "California"
        },
        {
          "city": "Fort Lauderdale",
          "state": "Florida"
        },
        {
          "city": "Lexington",
          "state": "Kentucky"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        },
        {
          "city": "Columbia",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05645536"
    },
    {
      "nct_id": "NCT04174352",
      "title": "FES Imaging to Optimize Tamoxifen for Metastatic Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "ERα+ Breast Cancer",
        "ESR1 Gene Mutation"
      ],
      "interventions": [
        {
          "name": "Tamoxifen",
          "type": "DRUG"
        },
        {
          "name": "FES PET/CT",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "19 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2020-10-20",
      "completion_date": "2027-12",
      "has_results": false,
      "last_update_posted_date": "2026-07-21",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 2,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        },
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04174352"
    },
    {
      "nct_id": "NCT00727948",
      "title": "The Effect of Aspirin on Angiogenesis Proteins in Women on Tamoxifen Therapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Breast Cancer",
        "Angiogenesis"
      ],
      "interventions": [
        {
          "name": "Aspirin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Vermont",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "95 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 95 Years · Female only"
      },
      "enrollment_count": 11,
      "start_date": "2008-07",
      "completion_date": "2012-12",
      "has_results": false,
      "last_update_posted_date": "2020-09-17",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 1,
      "location_summary": "Burlington, Vermont",
      "locations": [
        {
          "city": "Burlington",
          "state": "Vermont"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00727948"
    },
    {
      "nct_id": "NCT05941520",
      "title": "Acolbifene Versus Low Dose Tamoxifen for the Prevention of Breast Cancer in Premenopausal Women at High Risk for Development of Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Atypical Hyperplasia",
        "Breast Carcinoma",
        "Breast Ductal Carcinoma In Situ",
        "Breast Lobular Carcinoma In Situ"
      ],
      "interventions": [
        {
          "name": "Acolbifene Hydrochloride",
          "type": "DRUG"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Mammography",
          "type": "PROCEDURE"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Random Periareolar Fine-Needle Aspiration",
          "type": "PROCEDURE"
        },
        {
          "name": "Tamoxifen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "35 Years and older · Female only"
      },
      "enrollment_count": 80,
      "start_date": "2024-10-10",
      "completion_date": "2028-09-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-07",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 4,
      "location_summary": "Duarte, California • Chicago, Illinois • Kansas City, Kansas + 1 more",
      "locations": [
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Kansas City",
          "state": "Kansas"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05941520"
    },
    {
      "nct_id": "NCT00659373",
      "title": "Brain Function in Premenopausal Women Receiving Tamoxifen With or Without Ovarian Function Suppression for Early-Stage Breast Cancer on Clinical Trial IBCSG 24-02",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Breast Cancer",
        "Fatigue",
        "Sleep Disorders"
      ],
      "interventions": [
        {
          "name": "Tamoxifen",
          "type": "DRUG"
        },
        {
          "name": "triptorelin",
          "type": "DRUG"
        },
        {
          "name": "Exemestane",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "ETOP IBCSG Partners Foundation",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "120 Years",
        "sex": "FEMALE",
        "summary": "Up to 120 Years · Female only"
      },
      "enrollment_count": 86,
      "start_date": "2007-12",
      "completion_date": "2016-04",
      "has_results": true,
      "last_update_posted_date": "2016-07-25",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 13,
      "location_summary": "Sacramento, California • Fort Collins, Colorado • Norwalk, Connecticut + 7 more",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Fort Collins",
          "state": "Colorado"
        },
        {
          "city": "Norwalk",
          "state": "Connecticut"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00659373"
    },
    {
      "nct_id": "NCT00431444",
      "title": "Effects of Zoledronic Acid and Raloxifene on Bone Turnover Markers in Postmenopausal Women With Low Bone Mineral Density",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Raloxifene",
          "type": "DRUG"
        },
        {
          "name": "Zoledronic acid",
          "type": "DRUG"
        },
        {
          "name": "Placebo oral pills",
          "type": "DRUG"
        },
        {
          "name": "Placebo intravenous (i.v.) infusion",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "80 Years",
        "sex": "FEMALE",
        "summary": "45 Years to 80 Years · Female only"
      },
      "enrollment_count": 110,
      "start_date": "2007-01",
      "completion_date": "2008-07",
      "has_results": true,
      "last_update_posted_date": "2011-03-29",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 17,
      "location_summary": "Phoenix, Arizona • Buena Park, California • Washington D.C., District of Columbia + 12 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Buena Park",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00431444"
    },
    {
      "nct_id": "NCT07483307",
      "title": "A Study of the Impact of Endocrine Therapy on Surgical Outcomes in People With Lobular Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer",
        "HER2-negative Breast Cancer",
        "HER2 Negative Breast Carcinoma",
        "ER+ Breast Cancer",
        "Lobular Breast Carcinoma"
      ],
      "interventions": [
        {
          "name": "Neoadjuvant endocrine therapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "50 Years and older · Female only"
      },
      "enrollment_count": 176,
      "start_date": "2026-03-13",
      "completion_date": "2030-03-13",
      "has_results": false,
      "last_update_posted_date": "2026-06-04",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 7,
      "location_summary": "Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more",
      "locations": [
        {
          "city": "Basking Ridge",
          "state": "New Jersey"
        },
        {
          "city": "Middletown",
          "state": "New Jersey"
        },
        {
          "city": "Montvale",
          "state": "New Jersey"
        },
        {
          "city": "Commack",
          "state": "New York"
        },
        {
          "city": "Harrison",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07483307"
    },
    {
      "nct_id": "NCT00670319",
      "title": "Comparison of Raloxifene Hydrochloride and Placebo in the Treatment of Postmenopausal Women With Osteoporosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Osteoporosis, Postmenopausal"
      ],
      "interventions": [
        {
          "name": "Raloxifene HCL",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "80 Years",
        "sex": "FEMALE",
        "summary": "Up to 80 Years · Female only"
      },
      "enrollment_count": 7705,
      "start_date": "1994-11",
      "completion_date": "1999-09",
      "has_results": false,
      "last_update_posted_date": "2008-05-01",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00670319"
    },
    {
      "nct_id": "NCT00532428",
      "title": "Long Term Effects of Raloxifene Treatment on Bone Quality",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Osteoporosis, Post-Menopausal"
      ],
      "interventions": [
        {
          "name": "Raloxifene",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "85 Years",
        "sex": "FEMALE",
        "summary": "55 Years to 85 Years · Female only"
      },
      "enrollment_count": 31,
      "start_date": "2003-04",
      "completion_date": "2003-09",
      "has_results": false,
      "last_update_posted_date": "2007-09-20",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 2,
      "location_summary": "Indianapolis, Indiana • Omaha, Nebraska",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00532428"
    },
    {
      "nct_id": "NCT02057133",
      "title": "A Study of LY2835219 (Abemaciclib) in Combination With Therapies for Breast Cancer That Has Spread",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Breast Neoplasms"
      ],
      "interventions": [
        {
          "name": "LY2835219",
          "type": "DRUG"
        },
        {
          "name": "Letrozole",
          "type": "DRUG"
        },
        {
          "name": "Anastrozole",
          "type": "DRUG"
        },
        {
          "name": "Tamoxifen",
          "type": "DRUG"
        },
        {
          "name": "Exemestane",
          "type": "DRUG"
        },
        {
          "name": "Everolimus",
          "type": "DRUG"
        },
        {
          "name": "Trastuzumab",
          "type": "DRUG"
        },
        {
          "name": "LY3023414",
          "type": "DRUG"
        },
        {
          "name": "Fulvestrant",
          "type": "DRUG"
        },
        {
          "name": "Pertuzumab",
          "type": "DRUG"
        },
        {
          "name": "Loperamide",
          "type": "DRUG"
        },
        {
          "name": "Endocrine therapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 198,
      "start_date": "2014-03-10",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-01-26",
      "last_synced_at": "2026-09-07T17:46:06.457Z",
      "location_count": 13,
      "location_summary": "Rogers, Arkansas • La Jolla, California • Boston, Massachusetts + 7 more",
      "locations": [
        {
          "city": "Rogers",
          "state": "Arkansas"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02057133"
    }
  ]
}