Warfarin is a type of anti-clotting medicine, called an anticoagulant. It is a medicine used by thousands of people to prevent blood clots.

If you take warfarin, it is important that you know how to use it safely and correctly, to avoid side effects, especially bleeding.

To help make sure that warfarin is working safely and effectively in your body, you will need regular blood tests (monitoring).

Read about living with warfarin, how warfarin is monitored, the medicines that interact with warfarin, and how your lifestyle and diet can affect the way warfarin works.

Use the NPS Warfarin Dose Tracker to help you keep track of your INR results and your daily warfarin dose. Download or order a free copy, or have a copy sent to you by calling us on (02) 8217 8700.

Download our Living well with warfarin fact sheet — for people who’ve been prescribed warfarin, or their carers, to help you live safely with warfarin. The more you know about warfarin, the more your health will benefit.

Information for health professionals  

The NPS MedicineWise educational program Oral anticoagulants — achieving good anticoagulant practice focusses on optimal use of warfarin and the newer oral anticoagulants dabigatran, rivaroxaban and apixaban (see program Key messages).The February 2013 NPS Medicinewise News discusses good anticoagulant practice, particularly use of oral anticoagulants in stroke prevention for people with non-valvular AF.

Recent NPS RADAR articles have discussed the evidence behind use of:

Latest information - warfarin sodium


(Medical test)
16 May 2014 The PT test is a liver function test. The blood test checks how well clot-preventing medicines (anti-coagulants) such as warfarin are working, and investigates the clotting tendency of blood, liver damage & vitamin K status. Find out more
For health professionals (Medicine)
08 May 2014 The vitamin K antagonist warfarin and the newer oral anticoagulants dabigatran and rivaroxaban are approved treatments for stroke prevention in people with non-valvular atrial fibrillation (AF), but dabigatran and rivaroxaban are not PBS listed for this indication. Read about which people with non-valvular AF need anticoagulation and the role of these different medicines.
For health professionals (Health professional publication)
13 Mar 2014 The vitamin K antagonist warfarin can be used for the prevention and treatment of venous thromboembolism (VTE). The newer oral anticoagulants dabigatran, rivaroxaban and apixaban are all PBS subsidised for the prevention of VTE in patients undergoing total hip replacement or total knee replacement. Rivaroxaban is also PBS subsidised for treatment of acute symptomatic deep vein thrombosis without symptomatic pulmonary embolism and prevention of recurrent VTE. Read about the place in therapy of these medici
06 Feb 2014 Your general heath and medicines can affect your oral health. To help your dentist make the best treatment decisions for you, they will need to know about all the medicines you are taking, and any medical conditions you have.
(Media release)
13 Sep 2013 During National Stroke Week (9–15 September), NPS MedicineWise is reminding people who take warfarin about ways to help them take it safely.
For health professionals (Tool / resource)
01 Sep 2013 A tool to help you develop a structured therapeutic plan with your patients to better manage their anticoagulant therapy.
For health professionals (Topic)
30 Aug 2013 Tools and resources to help manage medicine use in older, elderly patients.
For health professionals (Topic)
30 Aug 2013 Some medicines can increase the risk of poor outcomes for older people and should be avoided
(Media release)
30 Jul 2013 With oral anticoagulant rivaroxaban set to be subsidised under the Pharmaceutical Benefits Scheme (PBS) for preventing stroke, NPS MedicineWise is urging people to talk to their doctor before stopping or making any changes to their anticoagulant medicines.
19 Jul 2013 Taking the correct dose for the right amount of time will help to prevent any dangerous blood clots occurring during your recovery.