Is Vitamin B12 Safe with Valproate?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Periodically monitor serum B12 and homocysteine levels. Supplement B12 if levels are low or borderline, especially in elderly patients or those with dietary restrictions.
Why this interaction occurs
Valproate use has been associated with reduced serum B12 levels and elevated homocysteine, potentially through disruption of one-carbon metabolism. Elevated homocysteine is a risk factor for vascular disease and may exacerbate folate-related neurotoxicity.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 34,884 reports mentioning Valproate. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Valproate + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Vitamin B12 interactions → · All Valproate interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.