Warfarin (also known under the brand names of Coumadin®, Jantoven®, Marevan®, and Waran®) is an anticoagulant medication that is administered orally or, very rarely, by injection. It is used for the prophylaxis of thrombosis and embolism in many disorders. Its activity has to be monitored by frequent blood testing for the international normalized ratio (INR). It is named for the Wisconsin Alumni Research Foundation.
Warfarin was originally developed as a rat poison, and is still widely used as such, although warfarin-resistant rats are becoming more common.
Blood Coagulation Disorders
Thrombosis :: Vascular Disorders

Coumadin - Product information, patient education, clinical data, helpful links and services are available for patients and healthcare professionals for warfarin sodium.
DrugDigest: Warfarin - Information on dosage, usage, side effects, interactions, and drug comparisons including generics when available.
Jantoven - Upsher Smith - Official pharmaceutical website with a patient information section and a section for health professionals.
Meta Description: [ JANTOVEN.com provides information and resources to help patients and caregivers start and maintain safe, effective anticoagulation with JANTOVEN. ]
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MSNBC News: Warfarin, Cranberry Juice Warning - Warns of a potentially fatal interaction between the drug and beverage.
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Warfarinfo.com - Information about the drug including its history, food and drug interactions, and FAQs.
Meta Description: [ The home page of the Warfarin Institute of America. Dedicated to helping people who take warfarin live healthy lives. ]
Warfarininfo.com - Sponsored by Barr Laboratories, Inc. and provides patients and health care professionals with information and educational materials.
Meta Description: [ Welcome to www.warfarininfo.com, an important resource for anticoagulation therapy information. This site is sponsored by Barr Laboratories, Inc. and provides patients and health care professionals with important information and educational materials about Warfarin Sodium Tablets, USP. ]
Warfarissimo - A free-to-use web interface that will simulate the action of oral anticoagulants such as warfarin and acenocoumarol based on input scenarios.
Meta Description: [ An on-line simulator of the pharmacokinetics
and action of warfarin and acenocoumarol ]
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