What is Warfarin?
Warfarin is a medicine used to treat or prevent blood clots. It is a type of blood-thinning medicine known as an anticoagulant (anti-clotting) and is taken in tablet form, once per day. There are many things that can affect how Warfarin works on each person, therefore if you are taking warfarin you will need to be closely monitored to make sure you are taking just the right amount.
Your usual treating doctor or your hospital doctor may have enrolled you in the our pathology Warfarin Care Clinic so that we can monitor your blood and keep your Warfarin dosage at a safe level. Patients cannot self-register because we require a detailed medical history. You will need to speak with your doctor about enrolling in the Warfarin Care Clinic.
The Warfarin Care Clinic is not funded by Medicare or any other funding source, therefore we require your full cooperation to make this service run efficiently and effectively. Your responsibilities are laid out in the Warfarin Care Clinic Charter. You will be provided with a copy of the charter when your doctor registers you and you will need to return the Charter Acceptance Form in order to complete your registration.
Scroll down to Resources where you can find lots of helpful information such as an educational Warfarin Booklet, Warfarin Charter, and a blank request for you to use once you are registered.
Blood test and Warfarin
Your blood test result is referred to as an INR (International Normalised Ratio). This is a measure of the time it takes for your blood to clot. The higher the INR, the thinner the blood and the less warfarin you need. The lower the INR the more likely it is that you will develop a clot, so you may need more warfarin. Your warfarin levels need to be in the right range for your individual set of circumstances.
Process
We have implemented an SMS results system designed to provide you with a convenient way to keep track of your warfarin dosage requirements.To register for our SMS service please contact our Warfarin Department.
If you are a new patient and have had your blood collected before 12.00pm, our Pathology will endeavour to phone you on the same day your blood test is performed.If you do not receive a call from the Warfarin Support Service by 10.00am the next day after testing, please contact us and quote your patient reference number. If you cannot make contact with the support service, continue with your current dose until contact is achieved.If you are experiencing significant bleeding you must seek medical advice ASAP through your doctor or hospital.
If you are an established patient and an abnormal result is identified you will be contacted as a matter of priority by our staff, however, until we contact you it is important that you continue taking your current dose of Warfarin.If there are changes to your dose you will be contacted within 48 hours to confirm your new dosage and the date of your next blood test.If you do not receive your results within 2-3 days, please contact us to confirm your INR and Warfarin doses.If you are experiencing significant bleeding you must seek medical advice ASAP through your doctor or hospital.
FAQ
We believe it is important that Warfarin does not inhibit aspects of your lifestyle; however, some changes are essential in order to control your INR level. Changes to diet and exercise show a significant positive effect on the stability of INR level. A booklet explaining these aspects can be obtained from us, please speak to the QML Pathology Warfarin Care Clinic operator when they next call in relation to your result.
Medicine changes – If any medicine changes are for 3 days or longer (prescribed, or over the counter). Including if you are taking heparin (e.g. Clexane®) injection.
Hospital Admission/Discharge – If you are admitted or discharged to hospital.
Surgery/procedures – Contact us if you are to have any surgery or dental procedures to advise us of your pre-operative requirements. Ask the doctor for any special instructions on when you should recommence your warfarin. Provide this information to the Warfarin Care Clinic.
Holidays – Tell us if you are going away on holidays so we can make the necessary arrangements for your testing.
No longer taking Warfarin – Tell us if you are stopping Warfarin.
The blood test result is referred to as an INR (International Normalised Ratio). This is a measure of the time it takes for your blood to clot. The higher the INR, the thinner the blood and the less warfarin you need. The lower the INR the more likely it is that you will develop a clot, so you may need more warfarin. Your warfarin levels need to be in the right range for your individual set of circumstances. INR targets are a range rather than a single figure because INRs tend to fluctuate and a range allows you (and us) more flexibility.
You’ll need to have blood tests to check how well warfarin is working. At first the blood tests are likely to be more frequent, however once your levels reach the therapeutic range and remain stable, these test dates can be extended. You will need regular blood testing as long as you remain on warfarin.
- Medicine changes. If your medication changes for three days or longer (prescribed, or over the counter). This includes heparin (e.g. Clexane®) injection.
- Hospital admission. If you’re admitted or discharged from hospital, please let us know.
- Surgery or dental procedures. You’ll need to advise us of your pre-operative requirements. Ask your doctor for any special instructions relating to when you should recommence your warfarin and let us know at the Warfarin Care Management Service.
- Holidays. You’ll need to tell us if you are going away on holidays so we can make the necessary arrangements for your testing.
- No longer taking warfarin. If you stop taking this medication, our clinic needs to be advised.
You can get your blood tested in any of our 2,000+ collection centres across Australia. If you are overseas we recommend that you contact a doctor at your destination and utilise local services during your stay.