{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D2+%28ergocalciferol%29&page=3",
    "query": {
      "intervention": "Vitamin D2 (ergocalciferol)",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 87,
    "total_pages": 9,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D2+%28ergocalciferol%29&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Vitamin+D2+%28ergocalciferol%29&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-10T20:53:05.097Z",
  "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": "NCT02074631",
      "title": "Prevention of Bone Loss After Pediatric Hematopoietic Cell Transplantation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Osteopenia",
        "Osteoporosis"
      ],
      "interventions": [
        {
          "name": "Pamidronate",
          "type": "DRUG"
        },
        {
          "name": "Calcium and vitamin D",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Masonic Cancer Center, University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "20 Years",
        "sex": "ALL",
        "summary": "1 Year to 20 Years"
      },
      "enrollment_count": 63,
      "start_date": "2015-02",
      "completion_date": "2022-10-06",
      "has_results": true,
      "last_update_posted_date": "2024-02-20",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 2,
      "location_summary": "Minneapolis, Minnesota • Seattle, Washington",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02074631"
    },
    {
      "nct_id": "NCT00502268",
      "title": "Vitamin D and Carboxy PTH Fragments in Coronary Calcification",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Coronary Calcification",
        "Endstage Renal Disease",
        "Parathyroid Hormone"
      ],
      "interventions": [
        {
          "name": "Doxercalciferol administration",
          "type": "DRUG"
        },
        {
          "name": "Doxercalciferol administered by 1-84-7-84",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Southeast Renal Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 0,
      "start_date": "2008-02",
      "completion_date": "2009-07",
      "has_results": false,
      "last_update_posted_date": "2020-12-23",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 1,
      "location_summary": "Charlotte, North Carolina",
      "locations": [
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00502268"
    },
    {
      "nct_id": "NCT00621257",
      "title": "Vitamin D Levels in Children With IBD",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Inflammatory Bowel Disease",
        "Crohn's Disease",
        "Ulcerative Colitis"
      ],
      "interventions": [
        {
          "name": "ergocalciferol",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Cholecalciferol",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Boston Children's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "5 Years to 21 Years"
      },
      "enrollment_count": 134,
      "start_date": "2008-01",
      "completion_date": "2011-03",
      "has_results": true,
      "last_update_posted_date": "2017-03-22",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00621257"
    },
    {
      "nct_id": "NCT03046927",
      "title": "Vitamin D and Residual Beta-Cell Function in Type 1 Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Type 1 Diabetes"
      ],
      "interventions": [
        {
          "name": "Ergocalciferol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Benjamin U. Nwosu, MD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "10 Years to 21 Years"
      },
      "enrollment_count": 48,
      "start_date": "2017-10-19",
      "completion_date": "2021-04-20",
      "has_results": true,
      "last_update_posted_date": "2024-07-10",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 1,
      "location_summary": "Worcester, Massachusetts",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03046927"
    },
    {
      "nct_id": "NCT00450073",
      "title": "Improving Vitamin D Status In Cystic Fibrosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cystic Fibrosis"
      ],
      "interventions": [
        {
          "name": "ergocalciferol (vitamin D2)",
          "type": "DRUG"
        },
        {
          "name": "Sperti Del Sol Lamp",
          "type": "DEVICE"
        },
        {
          "name": "Vitamin D3",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE"
      ],
      "sponsor": "Atlanta VA Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 30,
      "start_date": "2006-11",
      "completion_date": "2011-05",
      "has_results": true,
      "last_update_posted_date": "2014-02-21",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00450073"
    },
    {
      "nct_id": "NCT01320722",
      "title": "Study of Vitamin D and Uric Acid Lowering on Kidney and Blood Vessel Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Renal Function",
        "Endothelial Function",
        "Blood Pressure",
        "Overweight",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Vitamin D ergocalciferol",
          "type": "DRUG"
        },
        {
          "name": "Probenecid",
          "type": "DRUG"
        },
        {
          "name": "Allopurinol",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "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": 242,
      "start_date": "2011-03",
      "completion_date": "2015-06",
      "has_results": true,
      "last_update_posted_date": "2017-06-29",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01320722"
    },
    {
      "nct_id": "NCT00423358",
      "title": "Treatment of Hypovitaminosis D in Rheumatoid Arthritis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Rheumatoid Arthritis",
        "Hypovitaminosis D"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 22,
      "start_date": "2005-02",
      "completion_date": "2009-02",
      "has_results": true,
      "last_update_posted_date": "2015-08-24",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 1,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00423358"
    },
    {
      "nct_id": "NCT01004354",
      "title": "Vitamin D Supplementation in Psychiatric Illnesses",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Vitamin D Deficiency",
        "Psychosis",
        "Schizophrenia",
        "Schizoaffective Disorder"
      ],
      "interventions": [
        {
          "name": "Ergocalciferols",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Massachusetts, Worcester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "10 Years to 18 Years"
      },
      "enrollment_count": 12,
      "start_date": "2009-06",
      "completion_date": "2010-06",
      "has_results": true,
      "last_update_posted_date": "2017-11-06",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 1,
      "location_summary": "Worcester, Massachusetts",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01004354"
    },
    {
      "nct_id": "NCT03747523",
      "title": "Pilot Study: The Effect of Ergocalciferol on Plasma Mucin-1 Levels",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Ergocalciferol"
      ],
      "interventions": [
        {
          "name": "Ergocalciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 44,
      "start_date": "2019-03-12",
      "completion_date": "2020-01-27",
      "has_results": false,
      "last_update_posted_date": "2020-10-29",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 1,
      "location_summary": "Winston-Salem, North Carolina",
      "locations": [
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03747523"
    },
    {
      "nct_id": "NCT03401541",
      "title": "25-Hydroxyvitamin D Pharmacokinetic Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Vitamin D Deficiency",
        "Fat Malabsorption"
      ],
      "interventions": [
        {
          "name": "Calcifediol",
          "type": "DRUG"
        },
        {
          "name": "Calciferol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Boston University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 16,
      "start_date": "2018-10-01",
      "completion_date": "2019-11-01",
      "has_results": false,
      "last_update_posted_date": "2020-06-04",
      "last_synced_at": "2026-10-10T20:53:05.097Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03401541"
    }
  ]
}