Yes, they can: Avacado and oregano both have vitamin k and can alter inr levels. If you take the same amount daily, the Coumadin dose will be adjusted around this. Don't make any sudden diet changes, especially with an artificial heart valve. http://www.healthaliciousness.com/articles/food-sources-of-vitamin-k.php http://www.Ptinr.Com/warfarin-you/dietary-food-beverage/food-interactions/avocado-and-warfari.
Answered 6/24/2014
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