Drug interactions
Heparin + Nettle
Severity: Minor
Heparin and Nettle: 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
Nettle has been suggested to affect coagulation, possibly through its vitamin K content, which could oppose anticoagulants, though some reports suggest the opposite. Evidence for any effect on heparin is minimal and the direction is uncertain.
What this interaction means in plain words
Heparin and Nettle have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Not established; possible vitamin K content or other effects on hemostasis, though vitamin K does not antagonize heparin directly.
What to do
No routine change needed. Monitor aPTT or anti-Xa as part of standard heparin care and ask about herbal use.
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 Heparin
- Defibrotide + Heparin Contraindicated
- Heparin + Ketorolac Contraindicated
- Heparin + Oritavancin Contraindicated
- Acemetacin + Heparin Major
- Acetylsalicylic acid + Heparin Major
- Alteplase + Heparin Major
Frequently asked questions
Can I take Heparin with Nettle?
MediHelp rates the interaction as minor. Heparin and Nettle have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Nettle has been suggested to affect coagulation, possibly through its vitamin K content, which could oppose anticoagulants, though some reports suggest the opposite. Evidence for any effect on heparin is minimal and the direction is uncertain.
How serious is the interaction between Heparin and Nettle?
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 routine change needed. Monitor aPTT or anti-Xa as part of standard heparin care and ask about herbal use.
What other medicines interact with Heparin?
MediHelp also lists interactions of Heparin with, for example, Defibrotide, Ketorolac, Oritavancin. The full list is on the Heparin page.
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