Supplement stacks / St Johns Wort + Venlafaxine
Can You Take St Johns Wort with Venlafaxine?
St Johns Wort and Venlafaxine: one interaction flagged, scored 3/10 (high risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
Safety at a glance
This score comes from an AI-written analysis of the pair. Our interaction rules check it and can only make it stricter, never milder. Informational only: it can't account for your medications, conditions, or genetics.
What the AI-written analysis says
Combining St. John's Wort with venlafaxine may increase the risk of serotonin syndrome due to both substances affecting serotonin levels. Caution is advised, and consultation with a healthcare provider is essential before making any changes to medication or supplement regimens.
Venlafaxine is a prescription medication. This page describes publicly documented interactions — it can't see your dose, your other prescriptions, or your labs. Discuss any supplement with the prescriber or pharmacist who manages this medication before combining.
Known interactions
Suggestion: Consult healthcare provider before use.
St John's Wort
From the AI-written analysis.
Generally considered safe for short-term use; however, it can interact with various medications, including antidepressants.
Typical dosage: 300-900 mg daily, divided into doses
- Gastrointestinal upset
- Fatigue
- Allergic skin reactions
- May cause photosensitivity; use sunscreen.
- Consult healthcare provider if taking other medications.
Venlafaxine
From the AI-written analysis.
Effective for depression and anxiety; monitor for increased blood pressure and serotonin syndrome.
Typical dosage: As prescribed or as directed on the label
- Nausea
- Dizziness
- Dry mouth
- Increased sweating
- Monitor blood pressure regularly.
- Do not discontinue abruptly.
Also commonly mentioned
These come up in questions about this combination. They are not part of the pair above. From the AI-written analysis.
Omega-3 Fatty Acids
Generally safe; may support mood and cognitive function.
Typical dosage: 1000-3000 mg daily
- Fishy aftertaste
- Gastrointestinal discomfort
- Consult healthcare provider if on anticoagulants.
Magnesium
Essential mineral; may help with mood stabilization.
Typical dosage: 200-400 mg daily
- Diarrhea
- Nausea
- High doses may cause laxative effect; consult healthcare provider.
Vitamin D
Generally safe; supports overall health and mood.
Typical dosage: 600-2000 IU daily, depending on blood levels
- Nausea
- Headache
- Fatigue
- Monitor blood levels to avoid toxicity.
Timing
No timing arrangement makes this combination safe — see the warnings above.
Recommendations
- Consult with a healthcare provider before combining St. John's Wort with venlafaxine.
- Consider alternative supplements that do not interact with venlafaxine.
Watch out for
- Monitor for symptoms of serotonin syndrome, such as confusion, rapid heart rate, and increased blood pressure.
- No timing arrangement makes this combination safe — see the warnings above.
Frequently asked questions
Can you take St Johns Wort and Venlafaxine together?
St Johns Wort and Venlafaxine: one interaction flagged, scored 3/10 (high risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
What score does the St Johns Wort and Venlafaxine combination get?
The St Johns Wort and Venlafaxine combination is scored 3/10 (high risk). The score comes from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice. Always confirm with a healthcare professional.
When should you take St Johns Wort and Venlafaxine?
No timing arrangement makes this combination safe — see the warnings above.
What should you watch out for when combining St Johns Wort and Venlafaxine?
Monitor for symptoms of serotonin syndrome, such as confusion, rapid heart rate, and increased blood pressure. No timing arrangement makes this combination safe — see the warnings above.
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Not medical advice
AI-written analysis generated August 11, 2026, checked by our interaction rules · How our analysis works