Drug interactions
Penbutolol + Triamterene
Severity: Minor
Penbutolol and Triamterene: minor 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
Non-selective beta-blockers can modestly raise serum potassium by impairing cellular potassium uptake. With triamterene, hyperkalemia risk increases slightly, mainly in patients with renal impairment or diabetes. Additive blood-pressure lowering also occurs.
What this interaction means in plain words
Penbutolol and Triamterene have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Beta-blockade reduces beta-2 mediated cellular potassium uptake and renin release, adding to triamterene potassium retention.
What to do
Monitor serum potassium in patients with renal impairment or diabetes; routine action is otherwise unnecessary.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Penbutolol and Triamterene, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Triamterene
- Amiloride + Triamterene Contraindicated
- Eplerenone + Triamterene Contraindicated
- Potassium citrate / citric acid + Triamterene Contraindicated
- Potassium citrate + Triamterene Contraindicated
- Spironolactone + Triamterene Contraindicated
- Aceclofenac + Triamterene Major
Frequently asked questions
Can I take Penbutolol with Triamterene?
MediHelp rates the interaction as minor. Penbutolol and Triamterene have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Non-selective beta-blockers can modestly raise serum potassium by impairing cellular potassium uptake. With triamterene, hyperkalemia risk increases slightly, mainly in patients with renal impairment or diabetes. Additive blood-pressure lowering also occurs.
How serious is the interaction between Penbutolol and Triamterene?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor serum potassium in patients with renal impairment or diabetes; routine action is otherwise unnecessary.
What other medicines interact with Triamterene?
MediHelp also lists interactions of Triamterene with, for example, Amiloride, Eplerenone, Potassium citrate / citric acid. The full list is on the Triamterene page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
