The kidneys’ role
The kidneys help maintain balance by removing excess potassium in urine. Reduced kidney function may limit this capacity. Both chronic kidney disease and a sudden kidney problem can matter. Not everyone with kidney disease has high potassium, so blood measurements and the current clinical situation are assessed together. [1, 2]
Why medicines are reviewed
Some blood-pressure and heart medicines, potassium-sparing diuretics and certain pain medicines can affect potassium. Some of these blood-pressure and heart medicines provide important cardiovascular and kidney benefits. A high result therefore calls for a review of benefits and risks, rather than stopping every medicine without advice. [1, 2]
The list should include non-prescription medicines, herbal products and supplements. Availability without a prescription does not establish suitability for a person with reduced kidney function. Tell the team about new products even if they are used only occasionally.
Potassium can move out of cells
Most potassium is inside cells. Changes in acid-base balance, insulin deficiency and major tissue injury can alter its distribution between cells and blood. Assessment therefore involves more than calculating dietary intake. The clinician may also review blood glucose and other biochemical findings to understand the cause. [1]
Why salt substitutes are relevant
Some products replace part of the sodium in salt with potassium. Potassium chloride may appear on the ingredient list. Such products can substantially affect intake in people whose potassium removal is impaired. Potassium supplements and drinks containing added potassium belong in the same discussion. [1, 2]
Several causes may occur together
Reduced kidney function, a newly started medicine and recent fluid loss may overlap. Removing a single food may not address the whole problem. Comparing the timing of symptoms, medicines and previous results helps the team identify contributing factors and plan follow-up. A useful record states when a medicine or supplement began and whether vomiting, diarrhoea or another illness occurred around the time of the abnormal result. [2, 3]
References
- NIH ODS: Potassium, health professional fact sheet
- KDIGO 2024 CKD Guideline
- NIDDK: Keeping kidneys safe
This article provides general health information. Consult your clinician for individual diagnosis and treatment decisions, and your pharmacist for questions about medicine use.
Published by Aymed İlaç · 17 October 2026