What is warfarin?
Warfarin lowers the risk of blood clots forming in your body.
Blood tests are needed to monitor the effect of warfarin.
Bleeding is the most common side effect of warfarin.
Taking warfarin safely
There are two brands of warfarin. These are not the same, so don’t change brands.
Take your warfarin exactly as prescribed by your doctor.
Take warfarin once each day, the evening is recommended.
Make sure you always have enough tablets.
You should not skip a dose or take a double dose.
For emergencies: Carry identification that states you take warfarin.
Pregnancy: if you plan to become pregnant or think you are pregnant, talk to your
You need to have regular blood tests.
The dose of warfarin is changed based on blood test results.
After each test, the doctor will tell you what dose to take each day and when to have
your next blood test.
Things that affect warfarin
Other medicine: Warfarin is affected by many other medicines. This includes
prescription and non-prescription medicines, vitamins and herbal supplements. You need
to talk to your doctor before you stop any medicines or take anything new.
Diet: Some foods interact with warfarin and affect your treatment and dose. Maintain a
regular balanced diet. Contact your doctor if you can’t eat your usual diet. Small amounts
(1-2 standard drinks) of alcohol are OK.
Illness: Illness may change the effect of warfarin. Contact your doctor if you become ill.
Warfarin and bleeding
Contact your doctor right away if you have any signs of unusual bleeding.
Tell your doctor or dentist about warfarin before any medical or dental procedures.
Contact your doctor before starting any activity that may cause injury.
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