{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=vitamin+K+antagonist",
    "query": {
      "intervention": "vitamin K antagonist"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 47,
    "total_pages": 5,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=vitamin+K+antagonist&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-29T03:48:54.629Z",
  "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": "NCT02100228",
      "title": "Study Of The Blood Thinner, Apixaban, For Patients Who Have An Abnormal Heart Rhythm (Atrial Fibrillation) And Expected To Have Treatment To Put Them Back Into A Normal Heart Rhythm (Cardioversion)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Apixaban",
          "type": "DRUG"
        },
        {
          "name": "Parenteral heparin and/or oral Vitamin K antagonist",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1500,
      "start_date": "2014-07-14",
      "completion_date": "2017-02-08",
      "has_results": true,
      "last_update_posted_date": "2018-05-23",
      "last_synced_at": "2026-09-29T03:48:54.629Z",
      "location_count": 63,
      "location_summary": "Birmingham, Alabama • Avondale, Arizona • Chula Vista, California + 32 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Avondale",
          "state": "Arizona"
        },
        {
          "city": "Chula Vista",
          "state": "California"
        },
        {
          "city": "Hartford",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02100228"
    },
    {
      "nct_id": "NCT02690155",
      "title": "Real-world Comparative Effectiveness of Rivaroxaban Versus VKA",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Rivaroxaban (Xarelto, BAY59-7939)",
          "type": "DRUG"
        },
        {
          "name": "VKA (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": 38831,
      "start_date": "2016-02-12",
      "completion_date": "2016-03-01",
      "has_results": false,
      "last_update_posted_date": "2017-04-05",
      "last_synced_at": "2026-09-29T03:48:54.629Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02690155"
    },
    {
      "nct_id": "NCT01729871",
      "title": "A Study Exploring Two Treatment Strategies in Patients With Atrial Fibrillation Who Undergo Catheter Ablation Therapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "rivaroxaban",
          "type": "DRUG"
        },
        {
          "name": "uninterrupted vitamin K antagonist (VKA)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Janssen Scientific Affairs, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 253,
      "start_date": "2013-02",
      "completion_date": "2014-10",
      "has_results": true,
      "last_update_posted_date": "2017-03-06",
      "last_synced_at": "2026-09-29T03:48:54.629Z",
      "location_count": 24,
      "location_summary": "Beverly Hills, California • Los Angeles, California • Sacramento, California + 21 more",
      "locations": [
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01729871"
    },
    {
      "nct_id": "NCT00071279",
      "title": "SR34006 Compared to Placebo in Patients Who Have Completed 6 Months of Treatment for Symptomatic Pulmonary Embolism or Deep Vein Thrombosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pulmonary Embolism",
        "Deep Vein Thrombosis"
      ],
      "interventions": [
        {
          "name": "SR34006 (idraparinux sodium) Injection",
          "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": 1215,
      "start_date": "2003-11",
      "completion_date": "2005-12",
      "has_results": false,
      "last_update_posted_date": "2011-04-06",
      "last_synced_at": "2026-09-29T03:48:54.629Z",
      "location_count": 32,
      "location_summary": "Bay Pines, Florida • Brandon, Florida • Jacksonville, Florida + 23 more",
      "locations": [
        {
          "city": "Bay Pines",
          "state": "Florida"
        },
        {
          "city": "Brandon",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Melbourne",
          "state": "Florida"
        },
        {
          "city": "Palm Bay",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00071279"
    },
    {
      "nct_id": "NCT02687867",
      "title": "Real-world Comparative Effectiveness of Dabigatran Versus Vitamin K Antagonist",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Dabigatran (Pradaxa)",
          "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": 56039,
      "start_date": "2016-02-12",
      "completion_date": "2016-03-01",
      "has_results": false,
      "last_update_posted_date": "2017-04-05",
      "last_synced_at": "2026-09-29T03:48:54.629Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02687867"
    },
    {
      "nct_id": "NCT01830543",
      "title": "A Study Exploring Two Strategies of Rivaroxaban (JNJ39039039; BAY-59-7939) and One of Oral Vitamin K Antagonist in Patients With Atrial Fibrillation Who Undergo Percutaneous Coronary Intervention",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Atrial Fibrillation",
        "Percutaneous Coronary Intervention"
      ],
      "interventions": [
        {
          "name": "rivaroxaban 2.5 mg",
          "type": "DRUG"
        },
        {
          "name": "rivaroxaban 15 mg",
          "type": "DRUG"
        },
        {
          "name": "rivaroxaban 10 mg",
          "type": "DRUG"
        },
        {
          "name": "aspirin (ASA)",
          "type": "DRUG"
        },
        {
          "name": "vitamin K antagonist (VKA)",
          "type": "DRUG"
        },
        {
          "name": "clopidogrel",
          "type": "DRUG"
        },
        {
          "name": "prasugrel",
          "type": "DRUG"
        },
        {
          "name": "ticagrelor",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Janssen Scientific Affairs, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2124,
      "start_date": "2013-05-10",
      "completion_date": "2016-07-28",
      "has_results": true,
      "last_update_posted_date": "2017-09-19",
      "last_synced_at": "2026-09-29T03:48:54.629Z",
      "location_count": 86,
      "location_summary": "Huntsville, Alabama • Los Alamitos, California • Mission Viejo, California + 83 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Los Alamitos",
          "state": "California"
        },
        {
          "city": "Mission Viejo",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        },
        {
          "city": "Riverside",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01830543"
    },
    {
      "nct_id": "NCT02740335",
      "title": "Study of Octaplex, a Four-factor Prothrombin Complex Concentrate (4F-PCC) and Beriplex® P/N (Kcentra) for the Reversal of Vitamin K Antagonist (VKA) Induced Anticoagulation in Patients Needing Urgent Surgery With Significant Bleeding Risk.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Significant Bleeding Risk"
      ],
      "interventions": [
        {
          "name": "Octaplex",
          "type": "DRUG"
        },
        {
          "name": "Beriplex P/N (Kcentra)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Octapharma",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 208,
      "start_date": "2017-06-08",
      "completion_date": "2022-02-23",
      "has_results": true,
      "last_update_posted_date": "2023-03-08",
      "last_synced_at": "2026-09-29T03:48:54.629Z",
      "location_count": 22,
      "location_summary": "Aurora, Colorado • New Haven, Connecticut • Miami, Florida + 14 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02740335"
    },
    {
      "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": "2026-09-29T03:48:54.629Z",
      "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": "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": "2026-09-29T03:48:54.629Z",
      "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": "NCT02319460",
      "title": "An Observational Cohort Study to Investigate the Risk of Thromboembolic Events in Patients Receiving Kcentra® or Plasma to Reverse Vitamin K Antagonist (VKA) Therapy in the Setting of Acute Major Bleeding",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hemorrhage"
      ],
      "interventions": [
        {
          "name": "Kcentra®",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Plasma",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "CSL Behring",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2238,
      "start_date": "2014-04-24",
      "completion_date": "2020-06-30",
      "has_results": false,
      "last_update_posted_date": "2021-05-26",
      "last_synced_at": "2026-09-29T03:48:54.629Z",
      "location_count": 1,
      "location_summary": "Oakland, California",
      "locations": [
        {
          "city": "Oakland",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02319460"
    }
  ]
}