Jantoven - Upsher Smith
- Official pharmaceutical website with a patient information section and a section for health professionals.
- http://www.jantoven.com

Warfarissimo
- A free-to-use web interface that will simulate the action of oral anticoagulants such as warfarin and acenocoumarol based on input scenarios.
- http://warfarissimo.corlan.net

DrugDigest: Warfarin
- Information on dosage, usage, side effects, interactions, and drug comparisons including generics when available.
- http://www.drugdigest.org/DD/DVH/Uses/0,3915,705%7CWarfarin,00.html

Warfarin
- Information from the RxList.
- http://www.rxlist.com/cgi/generic/warfarin.htm

Warfarinfo.com
- Information about the drug including its history, food and drug interactions, and FAQs.
- http://www.warfarinfo.com/

Coumadin
- Product information, patient education, clinical data, helpful links and services are available for patients and healthcare professionals for warfarin sodium.
- http://www.coumadin.com/