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Jantoven (Warfarin Sodium) - Summary



  • Warfarin Sodium can cause major or fatal bleeding [see Warnings and Precautions (5.1) ].
  • Perform regular monitoring of INR in all treated patients [see Dosage and Administration (2.1) ].
  • Drugs, dietary changes, and other factors affect INR levels achieved with Warfarin Sodium therapy [see Drug Interactions (7) ].
  • Instruct patients about prevention measures to minimize risk of bleeding and to report signs and symptoms of bleeding [see Patient Counseling Information (17) ].



JANTOVEN (Warfarin Sodium Tablets, USP) is an anticoagulant that acts by inhibiting vitamin K-dependent coagulation factors.

JANTOVEN (WARFARIN) is indicated for the following:

  • Prophylaxis and treatment of venous thrombosis and its extension, pulmonary embolism (PE).
  • Prophylaxis and treatment of thromboembolic complications associated with atrial fibrillation (AF) and/or cardiac valve replacement.
  • Reduction in the risk of death, recurrent myocardial infarction (MI), and thromboembolic events such as stroke or systemic embolization after myocardial infarction.
  • Limitations of Use

    Warfarin Sodium has no direct effect on an established thrombus, nor does it reverse ischemic tissue damage. Once a thrombus has occurred, however, the goals of anticoagulant treatment are to prevent further extension of the formed clot and to prevent secondary thromboembolic complications that may result in serious and possibly fatal sequelae.


    See all Jantoven indications & dosage >>


    Media Articles Related to Jantoven (Warfarin)

    Most Don't Need 'Bridging' When They Stop Warfarin Temporarily
    Source: MedicineNet Atrial Fibrillation Specialty [2015.08.27]
    Title: Most Don't Need 'Bridging' When They Stop Warfarin Temporarily
    Category: Health News
    Created: 8/26/2015 12:00:00 AM
    Last Editorial Review: 8/27/2015 12:00:00 AM

    Blood Thinner Warfarin May Pose Greater Bleeding Risk for Obese: Study
    Source: MedicineNet amiodarone Specialty [2015.05.11]
    Title: Blood Thinner Warfarin May Pose Greater Bleeding Risk for Obese: Study
    Category: Health News
    Created: 5/8/2015 12:00:00 AM
    Last Editorial Review: 5/11/2015 12:00:00 AM

    Herbal Supplements, Warfarin Can Be Hazardous Mix
    Source: MedicineNet Saw Palmetto Specialty [2010.05.14]
    Title: Herbal Supplements, Warfarin Can Be Hazardous Mix
    Category: Health News
    Created: 5/13/2010 4:10:00 PM
    Last Editorial Review: 5/14/2010

    Aspirin as effective as warfarin and safer in stroke prevention
    Source: The Doctors Lounge - Neurology
    Intracranial stenosis is caused by atherosclerosis - fatty deposits that build up on the inner walls of the arteries and restrict blood flow.

    more news >>

    Published Studies Related to Jantoven (Warfarin)

    Genetics and the clinical response to warfarin and edoxaban: findings from the randomised, double-blind ENGAGE AF-TIMI 48 trial. [2015]
    anticoagulant rather than warfarin... INTERPRETATION: CYP2C9 and VKORC1 genotypes identify patients who are more likely

    Relationship between time in therapeutic range and comparative treatment effect of rivaroxaban and warfarin: results from the ROCKET AF trial. [2014]
    CONCLUSIONS: The treatment effect of rivaroxaban compared with warfarin for the

    Outcomes of temporary interruption of rivaroxaban compared with warfarin in patients with nonvalvular atrial fibrillation: results from the rivaroxaban once daily, oral, direct factor Xa inhibition compared with vitamin K antagonism for prevention of stroke and embolism trial in atrial fibrillation (ROCKET AF). [2014]
    CONCLUSIONS: TI of oral anticoagulation is common and is associated with

    Efficacy and safety of rivaroxaban compared with warfarin in patients with peripheral artery disease and non-valvular atrial fibrillation: insights from ROCKET AF. [2014]
    CONCLUSION: Patients with PAD in ROCKET AF did not have a statistically

    Apixaban vs. warfarin with concomitant aspirin in patients with atrial fibrillation: insights from the ARISTOTLE trial. [2014]
    CONCLUSION: Apixaban had similar beneficial effects on stroke or systemic

    more studies >>

    Clinical Trials Related to Jantoven (Warfarin)

    Warfarin Adverse Event Reduction For Adults Receiving Genetic Testing at Therapy INitiation (WARFARIN) [Recruiting]
    The WARFARIN Study is a clinical trial designed to determine if the use of genetic information related to warfarin sensitivity can help create a dose of warfarin that will result in less hospitalizations and deaths related to warfarin.

    Drug Interaction Study of Isavuconazole and Warfarin in Healthy Male Subjects [Completed]
    The purpose of this study is to assess the effect of multiple doses of isavuconazole on the pharmacokinetics (PK) of warfarin after single dose administration.

    Pharmacogenetics of Warfarin Induction and Inhibition [Completed]
    This research study will help determine how a person's genetic makeup affects their response to drugs, the ability of the body to break down drugs, and their potential to experience an interaction between drugs. The investigators are investigating the drug interactions with the commonly used anticoagulant drug called warfarin. Warfarin is used for the treatment and prevention of life-threatening abnormal blood clots such as deep vein thrombosis, heart attacks, and strokes. The investigators chose warfarin for this study because it is a commonly used drug and must be monitored closely to avoid side effects. The investigators are interested in studying whether individuals with certain genetic profiles react differently to warfarin when it is combined with other drugs. This research is being done to see if certain genetic profiles require us to adjust warfarin doses differently than is needed for the general population. Genetic profiles of subjects are determined from their participation in the Pharmacogenetics Registry study (investigator Richard Brundage, University of Minnesota). The study hypothesis is: Functionally defective CYP2C9 alleles attenuate the warfarin-fluconazole inhibitory interaction and exacerbate the warfarin-rifampin inductive interaction.

    Applying Pharmacogenetic Algorithms to Individualize Dosing of Warfarin [Completed]
    The purpose of this study is to determine whether DNA analysis improves the efficiency of dosing and safety in patients who are being started on warfarin therapy. Warfarin, a blood thinner (anticoagulant) prescribed to 1-2 million patients in the United States, is a leading cause of drug-related adverse events (e. g., severe bleeding), in large part due to dramatic (20-fold) differences between individuals in dose requirements. At least half of this variability now can be explained by 3 common genetic variants, age, body size, and sex; however, warfarin therapy continues to begin with the same dose in every patient with the correct individual dose determined by trial and error. This study proposes to determine genetic variations the same day from DNA simply obtained by swabbing the inside of the cheek and use this information to determine the proper dose regimen individually in each patient. The aim is to show that the investigators can achieve more rapid, efficient, and safe dosing in up to 500-1000 individuals who are initiating warfarin therapy for various clotting disorders across a large healthcare system in order to demonstrate improved dosing effectiveness, efficiency, and safety with genetic-based dosing, which could lead to a nationwide application resulting in as much as a $1 billion dollar annual benefit in healthcare outcomes.

    Genetic Response to Warfarin in Healthy Subjects [Completed]
    The purpose of this study is to determine the importance of genetic differences on individuals' response to warfarin in a group of healthy subjects. Warfarin is also known by the "trade name" Coumadin and is in a class of medications called anticoagulants or "blood thinners." Warfarin works by reducing the blood's ability to make clots. It is used to stop blood clots from forming or growing larger in your blood and blood vessels. Warfarin is prescribed for many conditions, including for people with certain types of irregular heartbeat, people with replacement or mechanical heart valves, people who have suffered a heart attack, people who have had orthopedic surgery, or who have a history of having blood clots. Warfarin is used to prevent or treat deep vein thrombosis (swelling and blood clot in a vein), pulmonary embolism (a blood clot in the lung), and strokes (a blood clot in the brain). Researchers have found that certain genes may affect how a person's body will break down or react to warfarin. If genetic information can help doctors better determine the best dose of warfarin before it is first given, this may help the doctors get patients to the correct levels of blood thinning and thereby reduce the risk of bleeding or the risk of developing a blood clot. The expectation of this study is that this information will ultimately improve warfarin therapy while lessening the risks associated with dosing errors. This study is considered investigational because the subjects are healthy and not being prescribed warfarin for clinical care.

    more trials >>

    Reports of Suspected Jantoven (Warfarin) Side Effects

    Drug Interaction (2)Status Epilepticus (2)Drug Dose Omission (1)Dizziness Postural (1)Anticonvulsant Drug Level Below Therapeutic (1)AGE-Related Macular Degeneration (1)International Normalised Ratio Decreased (1)Drug Administration Error (1)Drug Level Decreased (1)Blood Pressure Increased (1)more >>

    Page last updated: 2015-08-27

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