Drug interactions
Cinnamon + Metformin
Severity: Minor
Cinnamon and Metformin: 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
Cinnamon may lower blood glucose modestly and could add to metformin's effect. The evidence is inconsistent and clinically significant hypoglycemia is unlikely.
What this interaction means in plain words
Cinnamon and Metformin 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
Possible additive insulin-sensitizing, glucose-lowering effect of cinnamon constituents.
What to do
Monitor blood glucose if the patient takes cinnamon supplements regularly and adjust therapy if readings fall.
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 Metformin
Frequently asked questions
Can I take Cinnamon with Metformin?
MediHelp rates the interaction as minor. Cinnamon and Metformin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Cinnamon may lower blood glucose modestly and could add to metformin's effect. The evidence is inconsistent and clinically significant hypoglycemia is unlikely.
How serious is the interaction between Cinnamon and Metformin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood glucose if the patient takes cinnamon supplements regularly and adjust therapy if readings fall.
What other medicines interact with Metformin?
MediHelp also lists interactions of Metformin with, for example, Contrast media, Diatrizoate meglumine / diatrizoate, Diatrizoate. The full list is on the Metformin page.
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