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Doctor insights on: Fetal Warfarin

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Warfarin (Definition)

Warfarin is a medication used to thin the blood and to prevent or treat people with blood clots. It requires frequent blood ...Read more


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How could warfarin effect an embryo that is 2 weeks old in fetal age (4 weeks gestational)? There isn't even a placenta yet

How could warfarin effect an embryo that is 2 weeks old in fetal age (4 weeks gestational)? There isn't even a placenta yet

Great question: This assumes that you know exactly when you conceived. We see women all the time who have incorrect dates based on irregular timing of ovulation, conception and implantation. The fact is, warfarin is 'teratogenic' in the first trimester. Why would you take this risk? Talk to an mfm specialist. ...Read more

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Warfarin is teratogenic to a fetus. So why would my thrombosis specialist tell me to switch to lmwh only when i get pregnant and not before? Confused!

Warfarin is teratogenic to a fetus. So why would my thrombosis specialist tell me to switch to lmwh only when i get pregnant and not before? Confused!

Days of exposure: I'm assuming that your doctor knows you will take a pregnancy test as soon as you miss a period and that your periods are regular. There's no harm in switching to lmwh before conception, if you feel strongly, you can suggest that. The 2012 accp guidelines only 'weakly' suggest switch from warfarin --> lmwh after conception. There's absolutely no problem on lmwh while trying to conceive. ...Read more

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Is shaving safe on warfarin?

Is shaving safe on warfarin?

Probably: You need to be careful as it will take longer for the nicks to stop oozing. Many people switch to electric razors for this reason. ...Read more

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Are there any alternatives for warfarin?

Are there any alternatives for warfarin?

Many: As dr. Villaplana said, there are several. There are shots and pills. Although using alternatives to warfarin means that you don't have to be as careful about what you eat and you don't have to have regular blood tests to check whether you are getting too much or too little warfarin, they still have drawbacks. One of the most significant is that the alternatives are all a lot more expensive. ...Read more

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Please describe the medication: warfarin?

Blood Thinner: Warfarin is an oral medicine that reduces the vit k dependent clotting factors in blood. This slows down the clotting cascade and reduces the formation of blood clotts. ...Read more

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Why is the dosing of warfarin so difficult?

Why is the dosing of  warfarin so difficult?

Diet, genetics, etc.: The effect of warfarin varies with diet, genetic factors, other medications, herbals and otc's, etc. It is one of the most difficult drugs to manage. This is why there is so much excitement about new agents that don't suffer these issues. ...Read more

Dr. Ted King
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Coumadin (Definition)

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