Is Folate Safe with Valproate?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Take a folic acid supplement (400–5000 mcg/day as directed by your doctor), especially if pregnant or planning pregnancy. Do not stop valproate without consulting your neurologist.
Why this interaction occurs
Valproate inhibits dihydrofolate reductase and impairs folate metabolism, leading to significantly reduced serum folate levels. This increases the risk of neural tube defects in fetuses and may contribute to megaloblastic anemia and elevated homocysteine levels in long-term users.
Evidence
Evidence level: strong.
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 Folate interactions → · All Valproate interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.