Drug interactions
Ginko biloba + Vitamin k1
Severity: Minor
Ginko biloba and Vitamin k1: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Ginkgo biloba may slightly increase bleeding tendency through platelet effects, whereas phytonadione promotes clotting factor synthesis. There is no well-established clinical interaction between them and the net effect is not predictable.
What this interaction means in plain words
Ginko biloba and Vitamin k1 have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Ginko biloba belongs to Gastrointestinal Tract; Vitamin k1 belongs to Cardiovascular.
Why it happens
Opposing pharmacodynamic effects on hemostasis (platelet inhibition versus clotting factor synthesis); no established direct interaction.
What to do
No specific action is needed. In patients taking warfarin, keep vitamin K intake consistent and monitor INR if ginkgo is started or stopped.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Ginko biloba
- Ginko biloba + Ketorolac Major
- Abciximab + Ginko biloba Moderate
- Aceclofenac + Ginko biloba Moderate
- Acemetacin + Ginko biloba Moderate
- Alteplase + Ginko biloba Moderate
- Anagrelide + Ginko biloba Moderate
Other interactions of Vitamin k1
- Vitamin k1 + Warfarin Major
- Cholestyramine + Vitamin k1 Moderate
- Colestipol + Vitamin k1 Moderate
- Ketorolac intranasal + Vitamin k1 Moderate
- Mineral oil + Vitamin k1 Moderate
- Orlistat + Vitamin k1 Moderate
Frequently asked questions
Can I take Ginko biloba with Vitamin k1?
MediHelp rates the interaction as minor. Ginko biloba and Vitamin k1 have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Ginkgo biloba may slightly increase bleeding tendency through platelet effects, whereas phytonadione promotes clotting factor synthesis. There is no well-established clinical interaction between them and the net effect is not predictable.
How serious is the interaction between Ginko biloba and Vitamin k1?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No specific action is needed. In patients taking warfarin, keep vitamin K intake consistent and monitor INR if ginkgo is started or stopped.
What other medicines interact with Ginko biloba?
MediHelp also lists interactions of Ginko biloba with, for example, Ketorolac, Abciximab, Aceclofenac. The full list is on the Ginko biloba page.
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