{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Estradiol%2FNorethindrone+Acetate",
    "query": {
      "intervention": "Estradiol/Norethindrone Acetate"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 71,
    "total_pages": 8,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Estradiol%2FNorethindrone+Acetate&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-22T14:25:00.072Z",
  "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": "NCT00474851",
      "title": "The Effect of Hormonal Add-Back Therapy in Adolescents Treated With a GnRH Agonist for Endometriosis: A Randomized Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Endometriosis"
      ],
      "interventions": [
        {
          "name": "Norethindrone acetate + estrogens",
          "type": "DRUG"
        },
        {
          "name": "norethindrone acetate + placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Boston Children's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": "22 Years",
        "sex": "FEMALE",
        "summary": "13 Years to 22 Years · Female only"
      },
      "enrollment_count": 53,
      "start_date": "2007-08",
      "completion_date": "2015-01",
      "has_results": true,
      "last_update_posted_date": "2015-03-30",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00474851"
    },
    {
      "nct_id": "NCT05862272",
      "title": "A Phase 3B Study to Evaluate Bone Mineral Density With Long-Term Use of Relugolix Combination Tablet in Women With Uterine Fibroids or Endometriosis",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Uterine Fibroids",
        "Endometriosis"
      ],
      "interventions": [
        {
          "name": "Relugolix Combination Tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Sumitomo Pharma Switzerland GmbH",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 1000,
      "start_date": "2023-08-14",
      "completion_date": "2030-09",
      "has_results": false,
      "last_update_posted_date": "2025-08-06",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 120,
      "location_summary": "Mobile, Alabama • Chandler, Arizona • Mesa, Arizona + 98 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Peoria",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05862272"
    },
    {
      "nct_id": "NCT02654054",
      "title": "Efficacy and Safety of Elagolix in Combination With Estradiol/Norethindrone Acetate for the Management of Heavy Menstrual Bleeding Associated With Uterine Fibroids in Premenopausal Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Uterine Fibroids",
        "Heavy Menstrual Bleeding"
      ],
      "interventions": [
        {
          "name": "Elagolix",
          "type": "DRUG"
        },
        {
          "name": "Placebo for Estradiol/Norethindrone Acetate",
          "type": "DRUG"
        },
        {
          "name": "Estradiol/Norethindrone Acetate",
          "type": "DRUG"
        },
        {
          "name": "Placebo for Elagolix",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AbbVie",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "51 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 51 Years · Female only"
      },
      "enrollment_count": 413,
      "start_date": "2015-12-22",
      "completion_date": "2018-12-12",
      "has_results": true,
      "last_update_posted_date": "2020-06-29",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 92,
      "location_summary": "Birmingham, Alabama • Mobile, Alabama • Costa Mesa, California + 79 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Costa Mesa",
          "state": "California"
        },
        {
          "city": "Hawaiian Gardens",
          "state": "California"
        },
        {
          "city": "La Mesa",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02654054"
    },
    {
      "nct_id": "NCT01040845",
      "title": "A Pharmacokinetic Study of Colchicine With an Oral Contraceptive",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Pharmacokinetics"
      ],
      "interventions": [
        {
          "name": "Norethindrone/Ethinyl Estradiol",
          "type": "DRUG"
        },
        {
          "name": "Colchicine",
          "type": "DRUG"
        },
        {
          "name": "Placebo (for Colchicine)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Mutual Pharmaceutical Company, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 30,
      "start_date": "2007-08",
      "completion_date": "2008-02",
      "has_results": true,
      "last_update_posted_date": "2010-01-05",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 1,
      "location_summary": "Fargo, North Dakota",
      "locations": [
        {
          "city": "Fargo",
          "state": "North Dakota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01040845"
    },
    {
      "nct_id": "NCT06439524",
      "title": "The Effect of Medical Management Following Excisional Surgery for Endometriosis: A Randomized Controlled Trial",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Endometriosis"
      ],
      "interventions": [
        {
          "name": "40 mg relugolix, 1 mg estradiol, 0.5 mg norethindrone acetate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Main Line Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 110,
      "start_date": "2024-08-15",
      "completion_date": "2028-12-01",
      "has_results": false,
      "last_update_posted_date": "2026-06-12",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 1,
      "location_summary": "Wynnewood, Pennsylvania",
      "locations": [
        {
          "city": "Wynnewood",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06439524"
    },
    {
      "nct_id": "NCT00999479",
      "title": "Post Operative Continuous Active Combination Sex Steroids for the Prevention of Recurrent Endometrioma Formation",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Endometrioma"
      ],
      "interventions": [
        {
          "name": "Norethindrone acetate and ethinyl estradiol tablets, USP",
          "type": "DRUG"
        },
        {
          "name": "ferrous fumarate (placebo) tablets",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Oklahoma",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 35 Years · Female only"
      },
      "enrollment_count": 0,
      "start_date": "2009-10",
      "completion_date": "2011-10",
      "has_results": false,
      "last_update_posted_date": "2013-12-10",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 1,
      "location_summary": "Oklahoma City, Oklahoma",
      "locations": [
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00999479"
    },
    {
      "nct_id": "NCT02691494",
      "title": "Efficacy and Safety of Elagolix in Combination With Estradiol/Norethindrone Acetate for the Management of Heavy Menstrual Bleeding Associated With Uterine Fibroids in Premenopausal Women (Replicate Study)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Uterine Fibroids",
        "Heavy Menstrual Bleeding"
      ],
      "interventions": [
        {
          "name": "Elagolix",
          "type": "DRUG"
        },
        {
          "name": "Placebo for Estradiol/Norethindrone Acetate",
          "type": "DRUG"
        },
        {
          "name": "Estradiol/Norethindrone Acetate",
          "type": "DRUG"
        },
        {
          "name": "Placebo for Elagolix",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AbbVie",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "51 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 51 Years · Female only"
      },
      "enrollment_count": 378,
      "start_date": "2016-02-03",
      "completion_date": "2019-01-23",
      "has_results": true,
      "last_update_posted_date": "2021-07-13",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 103,
      "location_summary": "Birmingham, Alabama • Dothan, Alabama • Fairhope, Alabama + 89 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Dothan",
          "state": "Alabama"
        },
        {
          "city": "Fairhope",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02691494"
    },
    {
      "nct_id": "NCT00391807",
      "title": "Study of Safety and Efficacy of an Oral Contraceptive",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Contraception"
      ],
      "interventions": [
        {
          "name": "Norethindrone acetate/ethinyl estradiol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Warner Chilcott",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 1683,
      "start_date": "2006-11",
      "completion_date": "2008-09",
      "has_results": true,
      "last_update_posted_date": "2013-04-22",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 66,
      "location_summary": "Phoenix, Arizona • Tempe, Arizona • Tucson, Arizona + 52 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tempe",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00391807"
    },
    {
      "nct_id": "NCT00350480",
      "title": "Treatment of Non-Gestational Acute Uterine Bleeding: A Randomized Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Uterine Hemorrhage",
        "Menorrhagia"
      ],
      "interventions": [
        {
          "name": "Provera",
          "type": "DRUG"
        },
        {
          "name": "Combination Birth Control pills",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Kaiser Permanente",
      "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": 240,
      "start_date": "2003-04",
      "completion_date": "2005-06",
      "has_results": false,
      "last_update_posted_date": "2015-03-11",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00350480"
    },
    {
      "nct_id": "NCT01466114",
      "title": "Estriol Treatment in Multiple Sclerosis (MS): Effect on Cognition",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Relapsing-remitting Multiple Sclerosis",
        "Secondary-progressive Multiple Sclerosis",
        "Primary-progressive Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "estriol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        },
        {
          "name": "Norethindrone",
          "type": "DRUG"
        },
        {
          "name": "Progestin Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 55 Years · Female only"
      },
      "enrollment_count": 64,
      "start_date": "2011-10",
      "completion_date": "2022-04",
      "has_results": false,
      "last_update_posted_date": "2019-11-06",
      "last_synced_at": "2026-09-22T14:25:00.072Z",
      "location_count": 4,
      "location_summary": "Los Angeles, California • Aurora, Colorado • Albuquerque, New Mexico + 1 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Albuquerque",
          "state": "New Mexico"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01466114"
    }
  ]
}