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Should I take a multivitamin if I am taking warfarin?

ANSWER

Most multivitamins have both vitamin K and vitamin E in them. Both can affect how warfarin works for you. If you're taking one now, make sure that you take it every day. If you don't usually take a multivitamin, make sure your doctor thinks it's a good idea before you start taking one.

SOURCES:

Cleveland Clinic: “Pulmonary Embolism.”

Heart and Stroke Foundation of Canada: “Anticoagulants.”

Journal of Pharmacy Practice : “A Comprehensive Review of Potential Warfarin-Fruit Interactions.”

National Blood Clot Alliance: “Vitamin K and Coumadin -- What You Need To Know.”

UpToDate: “Patient education: Warfarin (Coumadin) (Beyond the Basics).”

Mayo Clinic: "Prothrombin time test," "Warfarin diet: What foods should I avoid?"

UW Health: "Coumadin and Warfarin Diet Interactions."

Harvard Health Publishing: "Should you consider taking a fish oil supplement?"

Reviewed by Jennifer Robinson on March 27, 2020

SOURCES:

Cleveland Clinic: “Pulmonary Embolism.”

Heart and Stroke Foundation of Canada: “Anticoagulants.”

Journal of Pharmacy Practice : “A Comprehensive Review of Potential Warfarin-Fruit Interactions.”

National Blood Clot Alliance: “Vitamin K and Coumadin -- What You Need To Know.”

UpToDate: “Patient education: Warfarin (Coumadin) (Beyond the Basics).”

Mayo Clinic: "Prothrombin time test," "Warfarin diet: What foods should I avoid?"

UW Health: "Coumadin and Warfarin Diet Interactions."

Harvard Health Publishing: "Should you consider taking a fish oil supplement?"

Reviewed by Jennifer Robinson on March 27, 2020

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