Warfarin is a blood thinning medication that lowers the chance of blood clots forming in your body. If you have atrial fibrillation, certain types of valve replacement, or have had a heart attack or stroke, your doctor may prescribe this medication.

What You Need to Know

It is very important to take warfarin according to your physician’s instructions. Careful monitoring through blood tests called PT/INR is also critical because it alerts your physician to any needed dosage changes. Our clinic achieves high success rates for helping patients maintain INR in optimal range.

Warfarin interacts with prescription and non-prescription drugs, including herbal products. Notify our office if you start, stop, or change any drug.

It is important to eat a balanced diet and maintain a consistent amount of vitamin K in your diet. High amounts of vitamin K are generally found in in leafy green vegetables, certain legumes, and vegetable oils.

Call your provider if you experience any of these symptoms:

  • Nosebleeds
  • Throwing up blood
  • Red or dark brown urine
  • Red or black color in your stool
  • Unusually heavy menstrual period
  • Unusual pain or swelling
  • Bleeding from your gums when brushing your teeth
  • Bleeding from shaving or other cuts that don't stop easily
  • Headache, dizziness, or weakness
  • "Purple toes" or death of skin tissue (these are rare but serious side effects)