Supplement stacks / SAM-e + St Johns Wort

Can You Take SAM-e with St Johns Wort?

Taking SAM-e and St. John's Wort together may increase the risk of serotonin syndrome, especially in individuals taking other serotonergic medications. Both supplements have limited evidence regarding their efficacy and safety, and their interactions are not well-studied. Caution is advised, and consultation with a healthcare provider is recommended before combining these supplements.

Safety at a glance
High risk
Safety score3/10

Conservative, AI-assisted reading of publicly available medical sources (NIH, Mayo Clinic, WebMD, Examine.com). Informational only — it can't account for your medications, conditions, or genetics.

Known interactions
high

Suggestion: Consult healthcare provider before use.

SAM-e

Generally safe for most individuals; may cause gastrointestinal issues.

Typical dosage: 400-1600 mg daily, divided into doses.

Common side effects:
  • Nausea
  • Diarrhea
  • Insomnia
  • Anxiety
Warnings:
  • May interact with antidepressants and other serotonergic drugs.
  • Consult healthcare provider if taking other medications.
St. John's Wort

Generally considered safe for short-term use; may cause photosensitivity.

Typical dosage: 300-900 mg daily, divided into doses.

Common side effects:
  • Gastrointestinal upset
  • Fatigue
  • Dry mouth
  • Dizziness
Warnings:
  • May interact with various medications, including antidepressants and anticoagulants.
  • Consult healthcare provider if taking other medications.
Timing

Both supplements can be taken in the morning to align with potential mood-enhancing effects.

Recommendations
  • Consult with a healthcare provider before starting SAM-e and St. John's Wort together.
  • Monitor for symptoms of serotonin syndrome, such as confusion, rapid heart rate, and increased blood pressure.
Watch out for
  • Risk of serotonin syndrome when combining SAM-e and St. John's Wort; consult healthcare provider.
Frequently asked questions

Can you take SAM-e and St Johns Wort together?

Taking SAM-e and St. John's Wort together may increase the risk of serotonin syndrome, especially in individuals taking other serotonergic medications. Both supplements have limited evidence regarding their efficacy and safety, and their interactions are not well-studied. Caution is advised, and consultation with a healthcare provider is recommended before combining these supplements.

How safe is the SAM-e and St Johns Wort combination?

Our analysis of publicly available medical sources scores this combination 3/10 (high risk). This is an informational estimate, not medical advice — always confirm with a healthcare professional.

When should you take SAM-e and St Johns Wort?

Both supplements can be taken in the morning to align with potential mood-enhancing effects.

What should you watch out for when combining SAM-e and St Johns Wort?

Risk of serotonin syndrome when combining SAM-e and St. John's Wort; consult healthcare provider.

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Analysis generated August 11, 2026 · Sources include NIH, Mayo Clinic, WebMD, and Examine.com · How our analysis works