Is 5-HTP Safe with Venlafaxine?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Avoid this combination. Do not take 5-HTP while on Venlafaxine without explicit medical approval. Seek immediate care for symptoms like agitation, tremor, sweating, or high fever.
Why this interaction occurs
5-HTP is a direct serotonin precursor that increases serotonin synthesis. Combined with Venlafaxine's blockade of serotonin reuptake, the result is excessive serotonergic activity that can precipitate serotonin syndrome.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 92,249 reports mentioning Venlafaxine. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Venlafaxine + 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 5-HTP interactions → · All Venlafaxine interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.