Spirulina is a blue-green algae. It is loaded with vitamin K. You will have to increase your warfarin dose when you start taking it. Also if you ever run out and try to wait until the next trip to the store to get some more, you may find that your INR has skyrocketed because of the suddenly lessened intake of vitamin K. It has the potential to be a serious interaction.
Al Lodwick, R.Ph.
Certified Anticoagulation Care Provider
[URL=http://www.warfarinfo.com]Go to my website for warfarin information[/URL]