By: CPMC Genetic Counseling Staff
Reviewed by: Dorit S. Berlin, PhD, Coriell Institute for Medical Research

warfarinBlood clots can block the flow of blood through the body, and if blood flow is blocked, it can lead to tissue or organ damage. Warfarin, also known as Coumadin®, is a medication that is used to prevent blood from clotting. A medication that targets blood clots is called an anticoagulant. Other brand names for Warfarin include Jantoven® and Marfarin®.

How Often is Warfarin Prescribed?
In 2002, over 3 million patients in the U.S. were taking Warfarin1.

To schedule a free telephone consultation to discuss your CPMC results with a board-certified genetic counselor, email This email address is being protected from spambots. You need JavaScript enabled to view it. .

Learn more about Warfarin and understanding your likely response to this drug through the links below.

Page References

1. Kaufman DW, Kelly JP, Rosenberg L, et al. J Am Med Assoc. 2002;287:337–344.

Uses of Warfarin

Learn more about Warfarin [ Learn More › ]

Risk Factors

Both genetic and non-genetic factors affect how your body processes Warfarin [ Learn More › ]

Reduce Your Risk

Reduce your risk for an undesired response to Warfarin [ Learn More › ]

The CPMC Study

Learn how the CPMC Study identifies your response to Warfarin [ Learn More › ]