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  • Q&A with Australian Health Practitioners

    What supplements can I take with warfarin?

    I am on warfarin and have osteoarthrits. Warfarin is for a mechanical heart valve. I have been told that I should not take fish oil.
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  • Chris Fonda

    Dietitian, Nutritionist, Sports Dietitian

    As an Accredited Sports Dietitian, APD and athlete (springboard diver), Chris has both professional and personal experience in sport at the sub-elite and elite level.Chris … View Profile

    That is absolutely correct. I would not recommend taking fish oil supplements whilst taking warfarin. Warfarin is an anticoagulant drug which means it stops your blood from clotting. Fish oil can provide a further anticoagulation effect which means that you are at an increased risk of bleeding.

    In my experience if you have been eating fish twice a week prior to taking warfarin than it is ok to continue but you must get your INR levels check regularly by your doctor. Working together with an Accredited Practising Dietitian (APD) and your doctor can help to keep your INR levels within range. To find an APD log onto the Dietitians Association of Australia's website (

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