Can You Take Potassium and St. John's Wort Together?
No documented interaction was identified between potassium and St. John's Wort in the sources reviewed.
See the full Potassium page and St. John's Wort page for other reviewed interactions and reference information.
What the interaction means
NCCIH's St. John's Wort page does not mention potassium. Potassium's own NIH fact sheet does not mention St. John's Wort.
No documented interaction between Potassium and St. John's Wort was identified in the authoritative sources reviewed. This is not a guarantee that no interaction exists for every dose, formulation, or individual -- it means the sources checked did not document one.
Practical context
Both Potassium's and St. John's Wort's own current authoritative sources were checked, in both directions.
What the sources say
Last reviewed 2026-08-23
Medical information disclaimer: this information is general and educational. It does not diagnose conditions, prescribe treatment, or determine whether a combination is safe for you personally. Follow your prescription label and ask a pharmacist or clinician before starting, stopping, or combining products. Full disclaimer.
Related guides
Related interactions
- Potassium and CalciumInsufficient evidence
- Potassium and MagnesiumInsufficient evidence
- Potassium and IronInsufficient evidence
- Potassium and WarfarinInsufficient evidence
- Potassium and SpironolactoneAvoid combining
- Potassium and LisinoprilMonitor
- Potassium and TurmericInsufficient evidence
- Potassium and Folate / Folic AcidInsufficient evidence
- Potassium and CiprofloxacinInsufficient evidence
- Potassium and CopperInsufficient evidence
- Potassium and CoQ10 (Coenzyme Q10)Insufficient evidence
- Potassium and ZincInsufficient evidence
- Potassium and DoxycyclineInsufficient evidence
- Potassium and ProbioticsInsufficient evidence
- Potassium and MelatoninInsufficient evidence
- Potassium and MetforminInsufficient evidence
- Potassium and AtorvastatinInsufficient evidence
- Potassium and CreatineInsufficient evidence
- Potassium and CaffeineInsufficient evidence
- Potassium and Vitamin DInsufficient evidence
- Potassium and Vitamin KInsufficient evidence
- Potassium and LevothyroxineInsufficient evidence
- Potassium and SertralineInsufficient evidence
- Potassium and Vitamin CInsufficient evidence
- Potassium and Vitamin B12Insufficient evidence
- Potassium and OmeprazoleMonitor
- Potassium and Omega-3 / Fish OilInsufficient evidence
- Potassium and AshwagandhaInsufficient evidence
- Potassium and AspirinInsufficient evidence
- Potassium and AmlodipineInsufficient evidence
- Potassium and IbuprofenInsufficient evidence
- Potassium and EscitalopramInsufficient evidence
- Potassium and LosartanMonitor
- Potassium and Vitamin EInsufficient evidence
- St. John's Wort and CiprofloxacinInsufficient evidence
- St. John's Wort and WarfarinUse caution
- St. John's Wort and SertralineUse caution
- St. John's Wort and Vitamin EInsufficient evidence
- St. John's Wort and Vitamin KInsufficient evidence
- St. John's Wort and SpironolactoneInsufficient evidence
- St. John's Wort and OmeprazoleInsufficient evidence
- St. John's Wort and MetforminInsufficient evidence
- St. John's Wort and DoxycyclineInsufficient evidence
- St. John's Wort and CopperInsufficient evidence
- St. John's Wort and CaffeineInsufficient evidence
- St. John's Wort and Vitamin DInsufficient evidence
- St. John's Wort and CreatineInsufficient evidence
- St. John's Wort and Vitamin CInsufficient evidence
- St. John's Wort and CalciumInsufficient evidence
- St. John's Wort and IronInsufficient evidence
- St. John's Wort and MagnesiumInsufficient evidence
- St. John's Wort and Vitamin B12Insufficient evidence
- St. John's Wort and AshwagandhaInsufficient evidence
- St. John's Wort and Omega-3 / Fish OilInsufficient evidence
- St. John's Wort and ZincInsufficient evidence
- St. John's Wort and LisinoprilInsufficient evidence
- St. John's Wort and CoQ10 (Coenzyme Q10)Insufficient evidence
- St. John's Wort and Folate / Folic AcidInsufficient evidence
- St. John's Wort and AtorvastatinMonitor
- St. John's Wort and LosartanInsufficient evidence
- St. John's Wort and MelatoninInsufficient evidence
- St. John's Wort and ProbioticsInsufficient evidence
- St. John's Wort and AspirinInsufficient evidence
- St. John's Wort and AmlodipineInsufficient evidence
- St. John's Wort and LevothyroxineInsufficient evidence
- St. John's Wort and IbuprofenInsufficient evidence
- St. John's Wort and TurmericInsufficient evidence
- St. John's Wort and EscitalopramUse caution