{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Iron+%28ferrous+sulfate%29&page=4",
    "query": {
      "intervention": "Iron (ferrous sulfate)",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 98,
    "total_pages": 10,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Iron+%28ferrous+sulfate%29&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Iron+%28ferrous+sulfate%29&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-09T23:43:43.101Z",
  "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": "NCT00395993",
      "title": "Comparison of the Safety and Efficacy of Intravenous Iron Versus Oral Iron in the Treatment of Anemia Secondary to Heavy Uterine Bleeding",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Anemia"
      ],
      "interventions": [
        {
          "name": "Ferric Carboxymaltose (FCM)",
          "type": "DRUG"
        },
        {
          "name": "Ferrous Sulfate tablets",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "American Regent, Inc.",
      "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": 456,
      "start_date": "2005-05",
      "completion_date": "2006-06",
      "has_results": true,
      "last_update_posted_date": "2018-02-20",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 1,
      "location_summary": "Norristown, Pennsylvania",
      "locations": [
        {
          "city": "Norristown",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00395993"
    },
    {
      "nct_id": "NCT05340465",
      "title": "Darbe Plus IV Iron to Decrease Transfusions While Maintaining Iron Sufficiency in Preterm Infants",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Prematurity",
        "Iron-deficiency",
        "Iron Deficiency Anemia",
        "Iron Malabsorption"
      ],
      "interventions": [
        {
          "name": "Darbepoetin Alfa",
          "type": "DRUG"
        },
        {
          "name": "Low Molecular Weight Iron Dextran",
          "type": "DRUG"
        },
        {
          "name": "Ferumoxytol injection",
          "type": "DRUG"
        },
        {
          "name": "Oral iron supplements",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "3 Days",
        "sex": "ALL",
        "summary": "Up to 3 Days"
      },
      "enrollment_count": 120,
      "start_date": "2022-11-27",
      "completion_date": "2027-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-05-26",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05340465"
    },
    {
      "nct_id": "NCT00459225",
      "title": "Iron Prophylaxis for Anemia in Infants With Cyanotic Congenital Heart Disease",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Anemia"
      ],
      "interventions": [
        {
          "name": "Iron (ferrous sulfate)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "2 Months",
        "sex": "ALL",
        "summary": "Up to 2 Months"
      },
      "enrollment_count": 0,
      "start_date": "2007-04",
      "completion_date": "2013-06",
      "has_results": false,
      "last_update_posted_date": "2014-12-09",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00459225"
    },
    {
      "nct_id": "NCT00223938",
      "title": "Study of the Efficacy and Safety of Ferrlecit in the Maintenance Dosing in Hemodialysis Patients.",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Anemia"
      ],
      "interventions": [
        {
          "name": "Oral Iron",
          "type": "DRUG"
        },
        {
          "name": "sodium ferric gluconate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Sanofi",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 112,
      "start_date": "2003-12-30",
      "completion_date": "2007-04-27",
      "has_results": false,
      "last_update_posted_date": "2021-06-24",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 8,
      "location_summary": "Hot Springs, Arkansas • Orange County, California • Simi Valley, California + 5 more",
      "locations": [
        {
          "city": "Hot Springs",
          "state": "Arkansas"
        },
        {
          "city": "Orange County",
          "state": "California"
        },
        {
          "city": "Simi Valley",
          "state": "California"
        },
        {
          "city": "Pembroke Pines",
          "state": "Florida"
        },
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00223938"
    },
    {
      "nct_id": "NCT04594070",
      "title": "Daily Versus Alternate Day Iron Supplementation for the Treatment of Iron Deficiency Anemia in Pregnancy",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Pregnancy Related",
        "Iron Deficiency Anemia of Pregnancy"
      ],
      "interventions": [
        {
          "name": "Ferrous sulfate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "The University of Texas Medical Branch, Galveston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 14,
      "start_date": "2020-10-27",
      "completion_date": "2024-01-12",
      "has_results": true,
      "last_update_posted_date": "2024-06-24",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 1,
      "location_summary": "Galveston, Texas",
      "locations": [
        {
          "city": "Galveston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04594070"
    },
    {
      "nct_id": "NCT01125163",
      "title": "Trial Comparing Iron Supplementation Versus Routine Iron Intake in Very Low Birth Weight Infants",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Iron Deficiency Anemia"
      ],
      "interventions": [
        {
          "name": "Iron Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "multivitamin",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "The University of Texas Health Science Center, Houston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "24 Weeks",
        "maximum_age": "32 Weeks",
        "sex": "ALL",
        "summary": "24 Weeks to 32 Weeks"
      },
      "enrollment_count": 150,
      "start_date": "2010-05",
      "completion_date": "2012-02",
      "has_results": true,
      "last_update_posted_date": "2019-01-04",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01125163"
    },
    {
      "nct_id": "NCT04268849",
      "title": "Trial of IV vs Oral Iron Treatment of Iron Deficiency Anemia in the Post-Operative Bariatric Surgical Patient",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Iron Deficiency Anemia"
      ],
      "interventions": [
        {
          "name": "Ferumoxytol",
          "type": "DRUG"
        },
        {
          "name": "Saline",
          "type": "DRUG"
        },
        {
          "name": "Ferrous sulfate tablets",
          "type": "DRUG"
        },
        {
          "name": "Vitamin C",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Auerbach Hematology Oncology Associates P C",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 104,
      "start_date": "2020-02-27",
      "completion_date": "2026-02",
      "has_results": false,
      "last_update_posted_date": "2025-10-03",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04268849"
    },
    {
      "nct_id": "NCT02327546",
      "title": "Effects of Ferrous Sulfate on the Pharmacokinetics of AKB-6548",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy Volunteers"
      ],
      "interventions": [
        {
          "name": "AKB-6548",
          "type": "DRUG"
        },
        {
          "name": "Ferrous Sulfate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Akebia Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "MALE",
        "summary": "18 Years to 55 Years · Male only"
      },
      "enrollment_count": 10,
      "start_date": "2014-12",
      "completion_date": "2015-02",
      "has_results": false,
      "last_update_posted_date": "2018-11-14",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 1,
      "location_summary": "Kalamazoo, Michigan",
      "locations": [
        {
          "city": "Kalamazoo",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02327546"
    },
    {
      "nct_id": "NCT05349630",
      "title": "Impact of Iron Supplementation on Right Ventricular Function and Exercise Performance in Hypoxia",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Right Ventricular Dysfunction",
        "Hypoxia"
      ],
      "interventions": [
        {
          "name": "Ferrous sulfate 325mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 5,
      "start_date": "2028-03",
      "completion_date": "2030-05",
      "has_results": false,
      "last_update_posted_date": "2026-04-29",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05349630"
    },
    {
      "nct_id": "NCT07061470",
      "title": "A Clinical Trial of Iron Supplementation for Youth With ADHD and Restless Sleep",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "ADHD",
        "Sleep Problems"
      ],
      "interventions": [
        {
          "name": "Ferrous Sulfate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Hugo W. Moser Research Institute at Kennedy Krieger, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "8 Years to 18 Years"
      },
      "enrollment_count": 70,
      "start_date": "2027-03-01",
      "completion_date": "2027-07-31",
      "has_results": false,
      "last_update_posted_date": "2026-05-04",
      "last_synced_at": "2026-10-09T23:43:43.101Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07061470"
    }
  ]
}