Is Lithium (Prescription) Safe with Inositol?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Inform your psychiatrist if you are considering inositol supplementation while on prescription lithium therapy. Do not self-initiate without clinical guidance. Monitor for any changes in mood stability.
Why this interaction occurs
Lithium's primary proposed mechanism of action in bipolar disorder involves inositol depletion via inhibition of inositol monophosphatase and inositol polyphosphate 1-phosphatase. Exogenous inositol supplementation may theoretically replenish inositol stores and attenuate lithium's therapeutic mood-stabilizing effects.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 820 reports mentioning Inositol. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Inositol + 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 Lithium (Prescription) interactions → · All Inositol interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.