What are the risks in using vitamin K?

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Certain medications and medical conditions may increase your risk for complications associated with taking vitamin K. Such medical conditions include: pregnancy, allergies to vitamin K, breastfeeding and glucose-6-phosphate dehydrogenase (G6PD) deficiency. Medications that may interact with vitamin K include: olestra, blood thinners, phenytoin, certain antibiotics, orlistat and bile acid sequestrants.

Taking vitamin K can cause side effects ranging from mild to severe. Mild side effects include flushing of the face, change in taste and dizziness. Severe side effects are increased perspiration, bluish discoloration on lips, fingernails and palms of the hands, allergic reactions and shortness of breath. If you experience any of these side effects, contact your doctor right away.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.