Check before you startThis one has documented interactions with medication classes where the consequences are serious. If you take any prescription medicine, run it past a pharmacist before starting.
How long to take it
Only as directed by a doctor, usually alongside a diuretic or a documented low level.
Who it's actually for
People with a measured deficiency. Not a general supplement.
Safe upper limit
Unverified99 mg per tablet in most countries; higher only by prescription
Excess potassium can cause dangerous heart rhythm disturbances, especially with reduced kidney function.
No source attached yet. Treat this as a starting point, not a citation, until reviewed.
Interactions to know about
- ACE inhibitors / ARBs — Ramipril, lisinopril, losartan, valsartan
- Diuretics (water tablets) — Furosemide, bendroflumethiazide, spironolactone
- Reduced kidney function — CKD, dialysis, or a single kidney
Other supplements:
Run your full list through the interaction check.
Practical notes
- A banana, potato or handful of beans beats any capsule.
- If you take an ACE inhibitor, ARB, or spironolactone, do not add potassium without medical advice.