Drug interactions
Amiloride + Penbutolol
Severity: Moderate
Amiloride and Penbutolol: moderate interaction.
Last updated
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
Beta-blockers can slightly raise serum potassium by reducing cellular uptake, and amiloride conserves potassium. Combined use may increase hyperkalemia risk, particularly with renal impairment or diabetes.
What this interaction means in plain words
Amiloride and Penbutolol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Nonselective beta-blockade reduces beta-2 mediated cellular potassium uptake, adding to amiloride's reduced renal potassium excretion.
What to do
Check serum potassium and renal function at the start of combined therapy and periodically afterward, especially in high-risk patients.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Amiloride
- Amiloride + Eplerenone Contraindicated
- Amiloride + Spironolactone Contraindicated
- Amiloride + Triamterene Contraindicated
- Aceclofenac + Amiloride Major
- Acemetacin + Amiloride Major
- Amiloride + Amlodipine-benazepril Major
Frequently asked questions
Can I take Amiloride with Penbutolol?
MediHelp rates the interaction as moderate. Amiloride and Penbutolol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Beta-blockers can slightly raise serum potassium by reducing cellular uptake, and amiloride conserves potassium. Combined use may increase hyperkalemia risk, particularly with renal impairment or diabetes.
How serious is the interaction between Amiloride and Penbutolol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check serum potassium and renal function at the start of combined therapy and periodically afterward, especially in high-risk patients.
What other medicines interact with Amiloride?
MediHelp also lists interactions of Amiloride with, for example, Eplerenone, Spironolactone, Triamterene. The full list is on the Amiloride page.
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