{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=vitamin+K+antagonist+%28VKA%29",
    "query": {
      "intervention": "vitamin K antagonist (VKA)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 26,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=vitamin+K+antagonist+%28VKA%29&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-06T12:00:36.264Z",
  "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": "NCT02798471",
      "title": "Hokusai Study in Pediatric Patients With Confirmed Venous Thromboembolism (VTE)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Venous Thromboembolism (VTE)",
        "Pulmonary Embolism",
        "Deep Vein Thrombosis (DVT)"
      ],
      "interventions": [
        {
          "name": "Edoxaban",
          "type": "DRUG"
        },
        {
          "name": "Standard of Care",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Daiichi Sankyo",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Day",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "1 Day to 17 Years"
      },
      "enrollment_count": 290,
      "start_date": "2017-03-27",
      "completion_date": "2022-05-24",
      "has_results": true,
      "last_update_posted_date": "2025-02-28",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 22,
      "location_summary": "Tucson, Arizona • Los Angeles, California • Stanford, California + 16 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02798471"
    },
    {
      "nct_id": "NCT00439777",
      "title": "Oral Direct Factor Xa Inhibitor Rivaroxaban in Patients With Acute Symptomatic Pulmonary Embolism - The EINSTEIN PE Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pulmonary Embolism"
      ],
      "interventions": [
        {
          "name": "Rivaroxaban (Xarelto, BAY59-7939)",
          "type": "DRUG"
        },
        {
          "name": "Enoxaparin overlapping with and followed by VKA",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 4833,
      "start_date": "2007-03",
      "completion_date": "2011-12",
      "has_results": true,
      "last_update_posted_date": "2014-02-27",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 23,
      "location_summary": "Little Rock, Arkansas • Redlands, California • Bay Pines, Florida + 18 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Redlands",
          "state": "California"
        },
        {
          "city": "Bay Pines",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00439777"
    },
    {
      "nct_id": "NCT00062803",
      "title": "SR34006 Compared to Vitamin K Antagonist (VKA) in the Treatment of Pulmonary Embolism",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pulmonary Embolism"
      ],
      "interventions": [
        {
          "name": "SR34006",
          "type": "DRUG"
        },
        {
          "name": "(LMW)heparin",
          "type": "DRUG"
        },
        {
          "name": "Warfarin VKA",
          "type": "DRUG"
        },
        {
          "name": "Acenocoumarol VKA",
          "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": null,
      "start_date": "2003-06",
      "completion_date": "2005-10",
      "has_results": false,
      "last_update_posted_date": "2009-04-29",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 54,
      "location_summary": "Loma Linda, California • San Diego, California • Aurora, Colorado + 43 more",
      "locations": [
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Bay Pines",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00062803"
    },
    {
      "nct_id": "NCT02072434",
      "title": "Edoxaban vs. Warfarin in Subjects Undergoing Cardioversion of Nonvalvular Atrial Fibrillation (NVAF)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Edoxaban",
          "type": "DRUG"
        },
        {
          "name": "Warfarin",
          "type": "DRUG"
        },
        {
          "name": "Enoxaparin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Daiichi Sankyo",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2199,
      "start_date": "2014-03-25",
      "completion_date": "2016-02-03",
      "has_results": true,
      "last_update_posted_date": "2019-03-15",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 28,
      "location_summary": "Phoenix, Arizona • Escondido, California • Newport Beach, California + 25 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Escondido",
          "state": "California"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "Riverside",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02072434"
    },
    {
      "nct_id": "NCT02687854",
      "title": "Real-world Comparative Effectiveness of Apixaban Versus Vitamin K Antagonist",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Apixaban",
          "type": "DRUG"
        },
        {
          "name": "Vitamin K antagonist",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 18591,
      "start_date": "2016-02-12",
      "completion_date": "2016-03-01",
      "has_results": false,
      "last_update_posted_date": "2017-04-05",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02687854"
    },
    {
      "nct_id": "NCT02227550",
      "title": "Apixaban During Atrial Fibrillation Catheter Ablation: Comparison to Vitamin K Antagonist Therapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Vitamin K antagonist",
          "type": "DRUG"
        },
        {
          "name": "Apixaban",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Atrial Fibrillation Network",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 676,
      "start_date": "2014-12",
      "completion_date": "2017-09",
      "has_results": false,
      "last_update_posted_date": "2017-10-20",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 5,
      "location_summary": "New York, New York • Philadelphia, Pennsylvania • Nashville, Tennessee + 2 more",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        },
        {
          "city": "Austin",
          "state": "Texas"
        },
        {
          "city": "Norfolk",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02227550"
    },
    {
      "nct_id": "NCT02596230",
      "title": "RE-COVERY DVT/PE: Global Study on Treatment Secondary Prevention of Acute Venous Thromboembolism",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Venous Thromboembolism"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Boehringer Ingelheim",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 7797,
      "start_date": "2015-11-05",
      "completion_date": "2019-03-31",
      "has_results": true,
      "last_update_posted_date": "2020-04-29",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 19,
      "location_summary": "Long Beach, California • Miami, Florida • Pembroke Pines, Florida + 15 more",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Pembroke Pines",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02596230"
    },
    {
      "nct_id": "NCT00440193",
      "title": "Oral Direct Factor Xa Inhibitor Rivaroxaban in Patients With Acute Symptomatic Deep Vein Thrombosis - The EINSTEIN DVT Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Venous Thrombosis"
      ],
      "interventions": [
        {
          "name": "Rivaroxaban (Xarelto, BAY59-7939)",
          "type": "DRUG"
        },
        {
          "name": "Enoxaparin followed by VKA",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 3449,
      "start_date": "2007-03",
      "completion_date": "2010-04",
      "has_results": true,
      "last_update_posted_date": "2014-02-27",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 23,
      "location_summary": "Little Rock, Arkansas • Redlands, California • Bay Pines, Florida + 18 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Redlands",
          "state": "California"
        },
        {
          "city": "Bay Pines",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00440193"
    },
    {
      "nct_id": "NCT03374540",
      "title": "Rivaroxaban vs Warfarin for SPAF in Multi-morbid Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Nonvalvular Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Rivaroxaban (Xarelto, BAY59-7939)",
          "type": "DRUG"
        },
        {
          "name": "Vitamin K antagonist (VKA)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 78517,
      "start_date": "2017-12-01",
      "completion_date": "2019-08-30",
      "has_results": false,
      "last_update_posted_date": "2020-08-17",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 1,
      "location_summary": "Multiple Locations, Washington",
      "locations": [
        {
          "city": "Multiple Locations",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03374540"
    },
    {
      "nct_id": "NCT02415400",
      "title": "A Study of Apixaban in Patients With Atrial Fibrillation, Not Caused by a Heart Valve Problem, Who Are at Risk for Thrombosis (Blood Clots) Due to Having Had a Recent Coronary Event, Such as a Heart Attack or a Procedure to Open the Vessels of the Heart",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Acute Coronary Syndromes"
      ],
      "interventions": [
        {
          "name": "Apixaban",
          "type": "DRUG"
        },
        {
          "name": "vitamin K antagonist",
          "type": "DRUG"
        },
        {
          "name": "Acetylsalicylic acid",
          "type": "DRUG"
        },
        {
          "name": "Acetylsalicylic acid placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Bristol-Myers Squibb",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "95 Years",
        "sex": "ALL",
        "summary": "18 Years to 95 Years"
      },
      "enrollment_count": 4614,
      "start_date": "2015-06-04",
      "completion_date": "2018-11-10",
      "has_results": true,
      "last_update_posted_date": "2020-06-11",
      "last_synced_at": "2026-10-06T12:00:36.264Z",
      "location_count": 143,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 125 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02415400"
    }
  ]
}