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Showing 1–24 of 110 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: vitamin K Clear all
Completed No phase listed Observational Results available

Warfarin and Coronary Calcification Project

NCT00868712
View directory record Official record
Conditions
Coronary Calcification
Interventions
Not listed
Lead sponsor
Walter Reed Army Medical Center
Federal
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Aug 23, 2012 · Synced Sep 10, 2026, 10:23 AM EDT
Recruiting No phase listed Observational

Post Marketing Observational Study on Safety of BALFAXAR vs. KCENTRA for Reversal of Vitamin K Antagonist Induced Anticoagulation in Adults Undergoing Urgent Surgery or Invasive Procedure

NCT06429787
View directory record Official record
Conditions
Vitamin K-Dependent Coagulation Defect, Significant Bleeding Risk
Interventions
Balfaxar, Kcentra
Drug
Lead sponsor
Octapharma
Industry
Eligibility
18 Years and older
Enrollment
3,574 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2032
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Sep 10, 2026, 10:23 AM EDT
Terminated Phase 3 Interventional

Long-term Treatment for Cancer Patients With Deep Venous Thrombosis or Pulmonary Embolism

NCT01164046
View directory record Official record
Conditions
Venous Thromboembolism, Neoplasms
Interventions
low molecular weight heparin, vitamin K antagonists
Drug
Lead sponsor
University Medical Center Groningen
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Dec 2, 2014 · Synced Sep 10, 2026, 10:23 AM EDT
Completed No phase listed Observational

Clinical Outcomes Among Non-valvular Atrial Fibrillation Patients With Renal Dysfunction

NCT03359876
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
Rivaroxaban (Xarelto, BAY59-7939), Warfarin sodium
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years and older
Enrollment
16,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Whippany, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 10, 2019 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Phase 1 Interventional

Drug-drug Interaction Study of Tivantinib (ARQ 197) With Omeprazole, S-warfarin, Caffeine, Midazolam, and Digoxin in Cancer Subjects

NCT01517399
View directory record Official record
Conditions
Solid Tumors
Interventions
tivantinib, omeprazole, s-warfarin, caffeine, vitamin K, digoxin, midazolam
Drug · Dietary Supplement
Lead sponsor
Daiichi Sankyo
Industry
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Feb 11, 2019 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Phase 1 Interventional

Pharmacokinetic Study to Evaluate the Effect of a Single Dose of Guselkumab (CNTO 1959) on CYP 450 Enzyme Activities After Subcutaneous Administration in Participants With Psoriasis

NCT02397382
View directory record Official record
Conditions
Psoriasis
Interventions
Guselkumab, Midazolam, Warfarin, Omeprazole, Dextromethorphan, Caffeine
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
8
States / cities
Anniston, Alabama • North Hollywood, California • Orlando, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Sep 19, 2017 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Phase 4 Interventional Results available

Fixed Versus Variable Dosing of 4-factor Prothrombin Complex Concentrate for Emergent Warfarin Reversal

NCT03064035
View directory record Official record
Conditions
Acute Bleeding on Long-Term Anticoagulation Therapy, Hemorrhage, Significant Bleeding in Patients With a Coagulopathy (Prolonged Thrombin Time), Urgent Reversal of Vitamin K Antagonist (VKA) Anticoagulation
Interventions
4-factor prothrombin complex concentrate (4FPCC)
Drug
Lead sponsor
HealthPartners Institute
Other
Eligibility
18 Years to 125 Years
Enrollment
79 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 13, 2023 · Synced Sep 10, 2026, 10:23 AM EDT
Recruiting Phase 1 Interventional

An Early-Stage Study in Multiple Clinics of How Afimkibart May Affect the Body's Processing of Medicines That Rely on Cytochrome P450 Enzymes in Participants With Ulcerative Colitis

NCT07665723
View directory record Official record
Conditions
Active Ulcerative Colitis
Interventions
Afimkibart, Caffeine, Warfarin, Omeprazole, Dextromethorphan, Midazolam, Vitamin K
Drug · Other
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years to 60 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
3
States / cities
Chula Vista, California • Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 10, 2026, 10:23 AM EDT
Withdrawn Phase 2Phase 3 Interventional Accepts healthy volunteers

Effects of a Supplement Derived From Palm Oil on Cholesterol Levels and Chinese Red Yeast Rice in the Blood

NCT02142569
View directory record Official record
Conditions
Cholesterol Lowering
Interventions
Sugar Pill, Chinese Red Yeast Rice (CRYR), CRYR + TRF, Tocotrienol-enriched Fraction of Palm Oil (TRF)
Drug · Device
Lead sponsor
University of California, Los Angeles
Other
Eligibility
35 Years to 70 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 10, 2019 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Factors II, VII, IX, X, and Proteins C and S, Following High-dose Vitamin K Supplementation

NCT01143831
View directory record Official record
Conditions
Thrombosis
Interventions
Vitamin K, 20mg
Dietary Supplement
Lead sponsor
Stephan Moll, MD
Other
Eligibility
20 Years to 85 Years · Male only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 11, 2012 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Phase 3 Interventional Results available

Edoxaban vs. Warfarin in Subjects Undergoing Cardioversion of Nonvalvular Atrial Fibrillation (NVAF)

NCT02072434
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
Edoxaban, Warfarin, Enoxaparin
Drug
Lead sponsor
Daiichi Sankyo
Industry
Eligibility
18 Years and older
Enrollment
2,199 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
28
States / cities
Phoenix, Arizona • Escondido, California • Newport Beach, California + 25 more
Source: ClinicalTrials.gov public record
Updated Mar 14, 2019 · Synced Sep 10, 2026, 10:23 AM EDT
Recruiting Phase 4 Interventional

Vitamin K for Perioperative Warfarin Management

NCT07515664
View directory record Official record
Conditions
Anticoagulant Therapy
Interventions
Vitamin K, Warfarin (standard without loading), Warfarin (standard with loading)
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 10, 2026, 10:23 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin K and Glucose Metabolism in Children at Risk for Diabetes (Vita-K 'n' Kids Study)

NCT01972113
View directory record Official record
Conditions
Obesity, Insulin Resistance, Insulin Sensitivity, Prediabetes, Dyslipidemia, Diabetes
Interventions
Placebo-Control, Low-Dose Vitamin K2 (menaquinone-7; 45 mcg/d), High-Dose Vitamin K2 (menaquinone-7; 90 mcg/d)
Dietary Supplement
Lead sponsor
Augusta University
Other
Eligibility
8 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2020
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 18, 2019 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Phase 3 Interventional Results available

An Open-Label Immunogenicity and Pharmacokinetics Study of Daclizumab High Yield Process Prefilled Syringe in Relapsing Remitting Multiple Sclerosis

NCT01462318
View directory record Official record
Conditions
Relapsing-Remitting Multiple Sclerosis
Interventions
Midazolam, Caffeine, S-warfarin, Vitamin K, Omeprazole, Dextromethorphan, BIIB019 (Daclizumab)
Drug · Other · Biological
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 65 Years
Enrollment
133 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
7
States / cities
Centennial, Colorado • Washington D.C., District of Columbia • Lake Barrington, Illinois + 4 more
Source: ClinicalTrials.gov public record
Updated Mar 13, 2017 · Synced Sep 10, 2026, 10:23 AM EDT
Active, not recruiting Not applicable Interventional

CHAMPION-AF Clinical Trial

NCT04394546
View directory record Official record
Conditions
Atrial Fibrillation, Stroke, Bleeding
Interventions
WATCHMAN FLX LAAC Device, Non-Vitamin K Oral Anticoagulant
Device · Drug
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
3,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
95
States / cities
Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 83 more
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Phase 3 Interventional

SR34006 Compared to Vitamin K Antagonist (VKA) in the Treatment of Pulmonary Embolism

NCT00062803
View directory record Official record
Conditions
Pulmonary Embolism
Interventions
SR34006, (LMW)heparin, Warfarin VKA, Acenocoumarol VKA
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2005
U.S. locations
54
States / cities
Loma Linda, California • San Diego, California • Aurora, Colorado + 43 more
Source: ClinicalTrials.gov public record
Updated Apr 28, 2009 · Synced Sep 10, 2026, 10:23 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

The Benefits of Natural Medicine, Vitamin IV Therapy and Supplements: Maintaining Good Health Through Nature

NCT05067998
View directory record Official record
Conditions
Anxiety Disorders and Symptoms, Fibromyalgia, Arthritis, Chronic Pain, Hypertension,Essential
Interventions
IV Vitamin Infused Therapy Treatment, Herbal medicine
Dietary Supplement · Drug
Lead sponsor
Faith A. Richardson
Other
Eligibility
21 Years to 80 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Dover, Delaware
Source: ClinicalTrials.gov public record
Updated Sep 22, 2025 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Not applicable Interventional

Daily Vitamin K in Patients on Warfarin With Unstable INRs

NCT00287313
View directory record Official record
Conditions
Anticoagulants, Warfarin
Interventions
Vitamin K
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 11, 2010 · Synced Sep 10, 2026, 10:23 AM EDT
Active, not recruiting Phase 2 Interventional

A Study of BPM31510 With Vitamin K1 in Subjects With Newly Diagnosed Glioblastoma (GB)

NCT04752813
View directory record Official record
Conditions
Glioblastoma, Glioblastoma Multiforme
Interventions
BPM31510, Vitamin K1, Temozolomide (TMZ), Radiation
Drug · Other · Radiation
Lead sponsor
BPGbio
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
11
States / cities
Los Angeles, California • Palo Alto, California • Santa Barbara, California + 7 more
Source: ClinicalTrials.gov public record
Updated Jan 25, 2026 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Not applicable Interventional Results available

Menadione Topical Lotion in Treating Skin Discomfort and Psychological Distress in Patients With Cancer Receiving Panitumumab, Erlotinib Hydrochloride, or Cetuximab

NCT01393821
View directory record Official record
Conditions
Dermatologic Complications, Malignant Neoplasm, Pain
Interventions
menadione topical lotion, placebo, questionnaire administration, management of therapy complications
Drug · Other · Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
2
States / cities
Phoenix, Arizona • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 15, 2025 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Phase 1 Interventional Results available

A Study of Mirikizumab in Participants With Plaque Psoriasis

NCT03718884
View directory record Official record
Conditions
Psoriasis
Interventions
Drug Cocktail, Mirikizumab
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
3
States / cities
Anaheim, California • DeLand, Florida • High Point, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 28, 2024 · Synced Sep 10, 2026, 10:23 AM EDT
Completed Phase 3 Interventional Results available

Explore the Efficacy and Safety of Once-daily Oral Rivaroxaban for the Prevention of Cardiovascular Events in Subjects With Nonvalvular Atrial Fibrillation Scheduled for Cardioversion

NCT01674647
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
Rivaroxaban (Xarelto, BAY59-7939), Vitamin K antagonist (VKA)
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years and older
Enrollment
1,504 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
66
States / cities
Mobile, Alabama • Scottsdale, Arizona • East Palo Alto, California + 58 more
Source: ClinicalTrials.gov public record
Updated Apr 29, 2015 · Synced Sep 10, 2026, 10:23 AM EDT
Completed No phase listed Observational

Predicting Bleeding Risk on Anticoagulant Therapy for Venous Thromboembolism

NCT00788736
View directory record Official record
Conditions
Venous Thromboembolism
Interventions
Not listed
Lead sponsor
Ottawa Hospital Research Institute
Other
Eligibility
18 Years and older
Enrollment
2,537 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
2
States / cities
Burlington, Massachusetts • Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 26, 2016 · Synced Sep 10, 2026, 10:23 AM EDT
Completed No phase listed Observational

Real-world Comparative Effectiveness of Rivaroxaban Versus VKA

NCT02690155
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
Rivaroxaban (Xarelto, BAY59-7939), VKA (Vitamin K antagonist)
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years and older
Enrollment
38,831 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 4, 2017 · Synced Sep 10, 2026, 10:23 AM EDT