Coumadin (Warfarin) and Vitamin C

Professor Linus Pauling: Genius!

Professor Linus Pauling:  A genius (two nobel prizes) exclaimed the health virtues of Vitamin C.
Professor Linus Pauling: A genius (two nobel prizes) exclaimed the health virtues of Vitamin C. | Source

Will Vitamin C interact with Coumadin (Warfarin)?

Will Vitamin C adversely interact with Coumadin (Warfarin) ?  The answer is yes it can.  This answer does not mean that Vitamin C will always adversely interact with Coumadin (Warfarin).  The medical literature indicates that the amount of Vitamin C taken and the individual's body chemistry plays a role in the interaction between Coumadin (Warfarin) and Vitamin C.

The medical literature also indicates that you should always consult and tell your physician that you are planning to take Vitamin C when you are on Coumadin (Warfarin).  Your physician then can advise you as what to do, and they will know that you are taking a supplement that can adversely interact with Coumadin (Warfarin).

What follows are links to sites that were helpful and informative in writing this article.



(1) This site is from the U.S. National Library of Medicine and National Institutes of Health    This site deals specifically with Vitamin C.  I found it very informative and the most conservative in regards to Vitamin C.  Highly recommended.

(2)  This site deals with Vitamin C. It is produced by the Linus Pauling Institute,    It gives very specific infomation about Vitamin C.  They give good information on how much Vitamin C is recommended to take each day.

(3)  This site deals with possible interactions with Vitamin C.    This site is from the University of Maryland Medical Center and deals directly with the possible interaction between Vitamin C and Coumadin (Warfarin). 

"If you are being treated with any of the following medications, you should not use vitamin C supplements without first talking to your health care provider."  Excellent Advise!

(4)  This site deals with Coumadin (Warfarin).  The history of how Coumadin was discovered is fascinating,    Wikipedia.

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Comments 2 comments

Ralph Deeds profile image

Ralph Deeds 5 years ago

Thanks for the information. I take Coumadin & Vitamin D, but no Vitamin C.

JamesBenjaminJrMD profile image

JamesBenjaminJrMD 5 years ago from USA Author

Dear Mr. Ralph Deeds, Thank you for kind comments. I researched and wrote this hub article because there was a "gap" in the lay literature concerning the interaction between Coumadin and Vitamin C. I always appreciate your comments.

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