Supplement stacks / Methylene Blue + St Johns Wort
Can You Take Methylene Blue with St Johns Wort?
Methylene Blue 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
Methylene blue and St. John's Wort may interact, particularly due to St. John's Wort's effects on liver enzymes, which could alter the metabolism of methylene blue. Both supplements have limited evidence regarding their safety and efficacy, and caution is advised when combining them.
Known interactions
St. John's Wort may induce cytochrome P450 enzymes, potentially affecting the metabolism of methylene blue.
Methylene Blue
From the AI-written analysis.
Generally safe when used as directed; may cause discoloration of urine and potential serotonin syndrome at high doses.
Typical dosage: As prescribed or as directed on the label
- Urine discoloration
- Nausea
- Headache
- Use caution in patients with serotonin syndrome risk.
- Consult healthcare provider before use.
St. John's Wort
From the AI-written analysis.
Generally considered safe for short-term use; may cause photosensitivity and gastrointestinal upset.
Typical dosage: 300-900 mg daily, divided into doses.
- Gastrointestinal upset
- Fatigue
- Photosensitivity
- May interact with various medications, including antidepressants and anticoagulants.
- Consult healthcare provider before use.
Timing
No timing arrangement makes this combination safe — see the warnings above.
Recommendations
- Consult with a healthcare provider before combining St. John's Wort and methylene blue.
- Monitor for any unusual side effects or changes in mood.
Watch out for
- Combining two or more serotonergic substances can raise the risk of serotonin syndrome, a potentially serious reaction. Ask a pharmacist, or the prescriber if any of these was prescribed, before you combine them. If any of these is a prescription, do not stop or change it on your own. Seek care for agitation, confusion, tremor, sweating, rapid heartbeat, or high fever.
- No timing arrangement makes this combination safe — see the warnings above.
Frequently asked questions
Can you take Methylene Blue and St Johns Wort together?
Methylene Blue 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 Methylene Blue and St Johns Wort combination get?
The Methylene Blue 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 Methylene Blue and St Johns Wort?
No timing arrangement makes this combination safe — see the warnings above.
What should you watch out for when combining Methylene Blue and St Johns Wort?
Combining two or more serotonergic substances can raise the risk of serotonin syndrome, a potentially serious reaction. Ask a pharmacist, or the prescriber if any of these was prescribed, before you combine them. If any of these is a prescription, do not stop or change it on your own. Seek care for agitation, confusion, tremor, sweating, rapid heartbeat, or high fever. 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