Is potassium supplements Safe with lisinopril?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Avoid taking potassium supplements (including potassium-containing salt substitutes) while on lisinopril unless explicitly directed by your doctor. If combined, have your blood potassium levels monitored regularly. Seek immediate care for symptoms of hyperkalemia such as muscle weakness, irregular heartbeat, or numbness.
Why this interaction occurs
ACE inhibitors like lisinopril reduce aldosterone secretion, decreasing renal potassium excretion. Adding potassium supplements can cause dangerously elevated serum potassium (hyperkalemia), particularly in patients with renal insufficiency or diabetes with mild renal impairment.
Evidence
Evidence level: strong.
Data source
PubMed - PMID 8354016
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 323,131 reports mentioning lisinopril. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the lisinopril + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All potassium supplements interactions → · All lisinopril interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.