We shouldn't lose sight of what warfarin is like in the real world - Dr. Robert Califf


image by: Elizabeth Lemons

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An Open Letter to Coumadin

Dear Coumadin,

Oh, Coumadin, you little 5 milligram orange pill that runs my life, how I hate you. There are so many reasons why I disdain you so. Let me count the ways:

One, the reason I take you. I have a blood clot and because of my heart I am basically disposed to get clots. I shouldn’t hate you because you are supposed to stop new clots, but oh well. I hate you anyway.

Number two, Coumadin, is the way you taste. Terrible. Like, nauseatingly bad. I used to be able to swallow pills. In fact, I could do it without any water. But no more! I need water to choke you down.

Reason number three that we cannot be friends is the bruising. I know that I have chicken…

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 An Open Letter to Coumadin

Oh, Coumadin, you little 5 milligram orange pill that runs my life, how I hate you. There are so many reasons why I disdain you so. Let me count the ways...


If you do not find answers to your questions about warfarin, please send your question via e-mail to [email protected] and you will receive a response from a member of our editorial board.

Coumadin Support Group

Join the 'Coumadin' group to help and get support from people like you.

Warfarin Support Group

This is a place to connect with people who are taking Warfarin. Commencing Warfarin therapy can be quite a shock; there is a lot to learn and many unexpected side effects to cope with, all while coming to terms with a diagnosis of a serious medical condition. Share your frustrations, fears and hopes with others who understand what it's like.


This site has been created to help you understand COUMADIN. We encourage you to learn all you can about taking COUMADIN and to use the tools we've provided to work with your doctor to manage your treatment.

Coumadin Protocol

Extensive resource from FP Notebook.

Everyday Health

Before using this medicine it's important to tell your doctor about all your previous health conditions as well as all the medications, including all prescription, non-prescription, illegal, recreational, herbal, nutritional, or dietary drugs that you are taking.


Although it will not dissolve blood clots that have already formed, warfarin may keep the clots from becoming larger and causing more serious problems.


Warfarin is commonly called a "blood thinner," but the more correct term is "anticoagulant." It helps to keep blood flowing smoothly in your body by decreasing the amount of certain substances (clotting proteins) in your blood.


While taking warfarin, your dose will be monitored once or twice a week using the international normalisation ratio (INR), which measures how long it takes your blood to clot. You may be monitored less frequently, depending on your readings. Although there are now three new anticoagulants that don’t require regular monitoring – rivaroxaban, apixaban and dabigatran – most patients who need an anticoagulant will be prescribed warfarin.

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