Is St. John's Wort Safe with Serotonergic Antidepressants (SSRIs, SNRIs)?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Do not combine St. This combination can cause serotonin syndrome, a medical emergency. Stop St. John's Wort and seek immediate medical attention if symptoms such as agitation, tremor, rapid heartbeat, fever, or muscle rigidity occur.
Why this interaction occurs
St. John's Wort has serotonergic activity through inhibition of serotonin reuptake. When combined with SSRIs or SNRIs, additive serotonergic effects can precipitate serotonin syndrome, which is potentially life-threatening. This is a pharmacodynamic interaction.
Evidence
Evidence level: strong.
Data source
PubMed - PMID 41901246
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 4,173 reports mentioning Serotonergic Antidepressants (SSRIs, SNRIs). This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Serotonergic Antidepressants (SSRIs, SNRIs) + 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 St. John's Wort interactions → · All Serotonergic Antidepressants (SSRIs, SNRIs) interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.