Drug interactions
Folic acid + Metformin
Severity: Minor
Folic acid 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
Metformin has been associated with lower folate levels in some patients, probably linked to vitamin B12 changes. The clinical relevance is small and folic acid supplementation is not harmful.
What this interaction means in plain words
Folic acid 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.
Folic acid belongs to Miscellaneous; Metformin belongs to Endocrine.
Why it happens
Mechanism not firmly established; may relate to altered intestinal absorption.
What to do
No routine action is needed. Check folate and B12 if anemia or macrocytosis develops.
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
Other interactions of Folic acid
- Ethotoin + Folic acid Moderate
- Folic acid + Fosphenytoin Moderate
- Folic acid + Glucarpidase Moderate
- Folic acid + Methotrexate Moderate
- Folic acid + Pafolacianine Moderate
- Folic acid + Phenobarbital Moderate
Frequently asked questions
Can I take Folic acid with Metformin?
MediHelp rates the interaction as minor. Folic acid 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. Metformin has been associated with lower folate levels in some patients, probably linked to vitamin B12 changes. The clinical relevance is small and folic acid supplementation is not harmful.
How serious is the interaction between Folic acid 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: No routine action is needed. Check folate and B12 if anemia or macrocytosis develops.
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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