Drug interactions
Lisinopril + Potassium chloride
Severity: Major
Lisinopril and Potassium chloride: major interaction.
Last updated Sources: US FDA label
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Lisinopril decreases renal potassium loss, and potassium chloride supplementation adds to the potassium load. This can produce clinically significant hyperkalemia with risk of cardiac arrhythmia, especially in renal impairment or diabetes.
What this interaction means in plain words
Lisinopril and Potassium chloride can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Lisinopril belongs to Cardiovascular; Potassium chloride belongs to Gastrointestinal Tract.
Why it happens
ACE inhibition reduces aldosterone, decreasing renal potassium excretion in the presence of supplemental potassium.
What to do
Avoid unless hypokalemia requires treatment; if combined, monitor serum potassium and creatinine closely and adjust or stop the supplement as needed.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Lisinopril
- Aliskiren + Lisinopril Contraindicated
- Lisinopril + Protein a column Contraindicated
- Lisinopril + Sacubitril / valsartan Contraindicated
- Lisinopril + Sacubitril-valsartan Contraindicated
- Amifostine + Lisinopril Major
- Amiloride + Lisinopril Major
Other interactions of Potassium chloride
Frequently asked questions
Can I take Lisinopril with Potassium chloride?
MediHelp rates the interaction as major. Lisinopril and Potassium chloride can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Lisinopril decreases renal potassium loss, and potassium chloride supplementation adds to the potassium load. This can produce clinically significant hyperkalemia with risk of cardiac arrhythmia, especially in renal impairment or diabetes.
How serious is the interaction between Lisinopril and Potassium chloride?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid unless hypokalemia requires treatment; if combined, monitor serum potassium and creatinine closely and adjust or stop the supplement as needed.
What other medicines interact with Lisinopril?
MediHelp also lists interactions of Lisinopril with, for example, Aliskiren, Protein a column, Sacubitril / valsartan. The full list is on the Lisinopril page.
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