Drug interactions
Penbutolol + Telmisartan
Severity: Minor
Penbutolol and Telmisartan: 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
Telmisartan and beta-blockers are often combined for additive blood pressure lowering, which may cause excessive hypotension or bradycardia in some patients. Beta-blockers can also slightly raise potassium, adding to the ARB effect, and telmisartan is unsafe in pregnancy.
What this interaction means in plain words
Penbutolol and Telmisartan 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
Additive antihypertensive effects through RAAS blockade and beta-adrenergic blockade.
What to do
Monitor blood pressure and heart rate when starting or adjusting either drug. Check potassium in patients with renal impairment.
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?
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Other interactions of Telmisartan
- Aliskiren + Telmisartan Contraindicated
- Sparsentan + Telmisartan Contraindicated
- Amifostine + Telmisartan Major
- Amiloride + Telmisartan Major
- Amlodipine-benazepril + Telmisartan Major
- Amlodipine-hydrochlorothiazide-valsartan + Telmisartan Major
Frequently asked questions
Can I take Penbutolol with Telmisartan?
MediHelp rates the interaction as minor. Penbutolol and Telmisartan have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Telmisartan and beta-blockers are often combined for additive blood pressure lowering, which may cause excessive hypotension or bradycardia in some patients. Beta-blockers can also slightly raise potassium, adding to the ARB effect, and telmisartan is unsafe in pregnancy.
How serious is the interaction between Penbutolol and Telmisartan?
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 blood pressure and heart rate when starting or adjusting either drug. Check potassium in patients with renal impairment.
What other medicines interact with Telmisartan?
MediHelp also lists interactions of Telmisartan with, for example, Aliskiren, Sparsentan, Amifostine. The full list is on the Telmisartan page.
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