Skip to main content

Vitamin K and Warfarin

Complete guide to taking Vitamin K with Warfarin. Safety, timing, and what the research says.

Significant InteractionIngredientMD curated

Vitamin K and Warfarin have a significant interaction. Vitamin K counteracts warfarin; can cause clots

Bottom line: Consult doctor - may need warfarin dose adjustment

How They Interact

Vitamin K counteracts warfarin; can cause clots

Timing

Consult doctor - may need warfarin dose adjustment

What to do about it

Consult doctor - may need warfarin dose adjustment

This is a clinically significant interaction. Consult your healthcare provider before combining these.

Evidence Sources

IngredientMD curated interaction database

Common Questions

Taking Vitamin K with Warfarin requires caution. Vitamin K counteracts warfarin; can cause clots Consult doctor - may need warfarin dose adjustment

Check the rest of the label

Every ingredient page carries the interactions, cautions and timing behind entries like this one.

Browse the library

Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. Always consult with a healthcare provider before making changes to your supplement regimen, especially if you take medications.