Drug interactions
Aspirin + Vitamin B12
Severity: Minor
Aspirin and Vitamin B12: 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
Long-term high-dose aspirin may modestly reduce vitamin B12 absorption or status, though the effect is small and rarely clinically significant.
What this interaction means in plain words
Aspirin and Vitamin B12 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 gastric mucosal irritation altering absorption; the mechanism is not firmly established.
What to do
No routine action is needed. Consider checking B12 status in patients on chronic high-dose aspirin with other risk factors for deficiency.
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 Vitamin B12
Frequently asked questions
Can I take Aspirin with Vitamin B12?
MediHelp rates the interaction as minor. Aspirin and Vitamin B12 have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Long-term high-dose aspirin may modestly reduce vitamin B12 absorption or status, though the effect is small and rarely clinically significant.
How serious is the interaction between Aspirin and Vitamin B12?
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. Consider checking B12 status in patients on chronic high-dose aspirin with other risk factors for deficiency.
What other medicines interact with Vitamin B12?
MediHelp also lists interactions of Vitamin B12 with, for example, Chloramphenicol, Dichlorphenamide, Metformin. The full list is on the Vitamin B12 page.
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