People with multiple risk factors for blood clots are at increased risk of clots compared to people with only one risk factor. Because people with several risk factors need special consideration, it is normal for healthcare professionals to perform a complete evaluation when a patient experiences their first blood clot. This is particularly important for children.
Additionally, warfarin should not be used during pregnancy because it may harm the growing fetus. Talk to your doctor about your treatment plan if you are pregnant or planning to become pregnant. The body needs vitamin K to produce some essential blood clotting factors.
Without enough vitamin K, these clotting factors may still be produced but are ineffective in clotting. Therefore, people with too little vitamin K have a bleeding tendency. Warfarin interferes with the action of vitamin K and therefore prolongs the time it takes to form a clot.
This is the intended effect of this therapy. Use of Health Topics. What do I need to know about my diet? Certain foods and dietary supplements have vitamin K. Vitamin K works against warfarin. If you eat more vitamin K, it can decrease your INR. If you eat less vitamin K, it can increase your INR. Your INR needs to be in a safe range—not too high and not too low. Vitamin K can change how warfarin works, which changes your INR. Keeping your warfarin and vitamin K intake steady every day helps keep you in a safe INR range.
Author: Healthwise Staff. Medical Review: E. This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information.
Your use of this information means that you agree to the Terms of Use. Learn how we develop our content. To learn more about Healthwise, visit Healthwise. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. It looks like your browser does not have JavaScript enabled. Please turn on JavaScript and try again. Warfarin is used to prevent blood clots from forming and is often used for medical conditions such as an irregular heartbeat, clots in the veins of the body called deep-vein thrombosis or pulmonary embolism, and after a heart valve replacement.
Apart from the findings of this clinical trial, there are other medications and vitamins that can affect how warfarin works. These include:. For patients who are told they need to take a blood thinner and are concerned about these issues, there are newer medications available called direct-acting oral anticoagulants DOACs.
This class of drugs includes apixaban , rivaroxaban , and others. However, there are other vitamins and medications that will affect people taking warfarin, and care must be taken when using them. New guidelines are recommending newer drugs due to concerns over potential severe bleeding from warfarin use.
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