Is Vitamin B12 (Cobalamin) Safe with Risperidone?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Vitamin B12 supplementation is generally safe with risperidone. If you are experiencing cognitive side effects or have documented elevated homocysteine, discuss B12 status with your doctor. Standard supplemental doses (500–1000 mcg/day) are well tolerated.
Why this interaction occurs
Risperidone use has been associated with elevated plasma homocysteine, a known neurotoxic and cardiovascular risk factor. Vitamin B12, along with folate and B6, is essential for homocysteine remethylation. Studies in schizophrenia populations have demonstrated that B12 deficiency correlates with worse cognitive outcomes and higher homocysteine levels. Supplementation may provide neuroprotective benefit without significant pharmacokinetic interaction with risperidone.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 63,944 reports mentioning Risperidone. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Risperidone + 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 (Cobalamin) interactions → · All Risperidone interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.