Supplement stacks / Fluoxetine + St Johns Wort
Can You Take Fluoxetine with St Johns Wort?
Fluoxetine and St Johns Wort: 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
Taking St. John's Wort alongside fluoxetine is not recommended due to the potential for significant drug interactions, particularly the risk of serotonin syndrome. Both substances affect serotonin levels, and combining them may lead to adverse effects. It is crucial to consult a healthcare provider before considering this combination.
Fluoxetine 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
Both fluoxetine and St. John's Wort can increase serotonin levels, potentially leading to serotonin syndrome, a serious condition.
Fluoxetine
From the AI-written analysis.
Generally safe when taken as prescribed, but can cause side effects and interactions.
Typical dosage: As prescribed or as directed on the label
- nausea
- insomnia
- dry mouth
- dizziness
- sexual dysfunction
- Monitor for signs of serotonin syndrome if combined with other serotonergic agents.
- Consult healthcare provider for dosage adjustments.
St John's Wort
From the AI-written analysis.
Generally well-tolerated but can interact with many medications, including antidepressants.
Typical dosage: 300-900 mg daily (standardized extract)
- gastrointestinal upset
- fatigue
- dry mouth
- dizziness
- photosensitivity
- Avoid combining with fluoxetine due to serotonin syndrome risk.
- Consult healthcare provider before use.
Also commonly mentioned
These come up in questions about this combination. They are not part of the pair above. From the AI-written analysis.
Vitamin D3
Generally safe; important for immune function and overall health.
Typical dosage: 600-2000 IU daily, depending on individual needs.
- nausea
- vomiting
- weakness
- constipation
- Monitor blood levels if taking high doses.
- Consult healthcare provider for appropriate dosing.
Zinc
Generally safe; supports immune function.
Typical dosage: 8-11 mg daily for adults.
- nausea
- diarrhea
- metallic taste
- Excessive intake can lead to copper deficiency.
- Consult healthcare provider for long-term use.
Elderberry
Generally safe; may help with immune support.
Typical dosage: 300-600 mg of elderberry extract daily.
- nausea
- diarrhea
- stomach cramps
- Use caution if allergic to plants in the family Adoxaceae.
- Consult healthcare provider if on other medications.
Timing
No timing arrangement makes this combination safe — see the warnings above.
Watch out for
- Do not combine fluoxetine with St. John's Wort due to the risk of serotonin syndrome. Consult a healthcare provider for alternatives.
Frequently asked questions
Can you take Fluoxetine and St Johns Wort together?
Fluoxetine and St Johns Wort: 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 Fluoxetine and St Johns Wort combination get?
The Fluoxetine and St Johns Wort 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 Fluoxetine and St Johns Wort?
No timing arrangement makes this combination safe — see the warnings above.
What should you watch out for when combining Fluoxetine and St Johns Wort?
Do not combine fluoxetine with St. John's Wort due to the risk of serotonin syndrome. Consult a healthcare provider for alternatives.
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Not medical advice
AI-written analysis generated August 11, 2026, checked by our interaction rules · How our analysis works