Drug interactions
Green tea + Mefenamic acid
Severity: Minor
Green tea and Mefenamic acid: 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
Green tea has been reported to have mild antiplatelet activity. Combined with an NSAID that also impairs platelet function and irritates the gastric mucosa, bleeding risk could be slightly increased. The evidence is largely theoretical.
What this interaction means in plain words
Green tea and Mefenamic acid have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Green tea belongs to Gastrointestinal Tract; Mefenamic acid belongs to Musculoskeletal.
Why it happens
Additive antiplatelet effects: NSAID cyclooxygenase inhibition plus possible platelet inhibition by green tea constituents.
What to do
No routine change is needed for normal tea intake. Advise patients to report black stools, unusual bruising or bleeding, particularly if they consume green tea extract supplements.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Green tea and Mefenamic acid, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Mefenamic acid
- Ketorolac intranasal + Mefenamic acid Contraindicated
- Ketorolac + Mefenamic acid Contraindicated
- Aceclofenac + Mefenamic acid Major
- Acemetacin + Mefenamic acid Major
- Acetylsalicylic acid + Mefenamic acid Major
- Alteplase + Mefenamic acid Major
Other interactions of Green tea
- Adenosine + Green tea Moderate
- Benzphetamine + Green tea Moderate
- Bortezomib + Green tea Moderate
- Dextroamphetamine + Green tea Moderate
- Diethylpropion + Green tea Moderate
- Ephedrine + Green tea Moderate
Frequently asked questions
Can I take Green tea with Mefenamic acid?
MediHelp rates the interaction as minor. Green tea and Mefenamic acid have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Green tea has been reported to have mild antiplatelet activity. Combined with an NSAID that also impairs platelet function and irritates the gastric mucosa, bleeding risk could be slightly increased. The evidence is largely theoretical.
How serious is the interaction between Green tea and Mefenamic acid?
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 is needed for normal tea intake. Advise patients to report black stools, unusual bruising or bleeding, particularly if they consume green tea extract supplements.
What other medicines interact with Mefenamic acid?
MediHelp also lists interactions of Mefenamic acid with, for example, Ketorolac intranasal, Ketorolac, Aceclofenac. The full list is on the Mefenamic acid page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
