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Table of Contents > Herbs > Bilberry > Interactions
Possible Interactions with: Bilberry
Also listed as: European Blueberry; Huckleberry; Vaccinium myrtillus

Blood-thinning medications, anticoagulants
In theory, because the anthocyanidins in bilberry may inhibit blood from clotting, there may be an increased risk of bleeding in those taking anthocyanidin extracts from bilberry along with blood thinners, particularly warfarin. This has not been tested scientifically, but those taking warfarin or other blood thinners in the same class, known as anticoagulants, should be very careful if considering use of bilberry and should be followed closely by a doctor who will check your INR (a measurement to indicate, in part, your risk of bleeding).

There has been one case report of a woman taking many herbs and supplements, including bilberry, experiencing a serious bleed following surgery for breast cancer. The other herbs and supplements she was taking that may have contributed to the risk of bleeding include ginkgo, ginseng, and vitamin E.

The whole bilberry fruit, therefore, which contains both anthocyanidins and tannins (that may help stop bleeding) is likely safer if you are on a blood thinner than the isolated anthocyanidin extracts.

Drug Interactions
Blood-thinning Medications

Copyright © 2004 A.D.A.M., Inc

The publisher does not accept any responsibility for the accuracy of the information or the consequences arising from the application, use, or misuse of any of the information contained herein, including any injury and/or damage to any person or property as a matter of product liability, negligence, or otherwise. No warranty, expressed or implied, is made in regard to the contents of this material. No claims or endorsements are made for any drugs or compounds currently marketed or in investigative use. This material is not intended as a guide to self-medication. The reader is advised to discuss the information provided here with a doctor, pharmacist, nurse, or other authorized healthcare practitioner and to check product information (including package inserts) regarding dosage, precautions, warnings, interactions, and contraindications before administering any drug, herb, or supplement discussed herein.

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