Drug interactions
Hydrochlorothiazide-irbesartan + Penbutolol
Severity: Minor
Hydrochlorothiazide-irbesartan and Penbutolol: 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
Combining a beta-blocker with an ARB and a thiazide produces additive blood pressure lowering, which is often intended but may cause hypotension, dizziness or bradycardia. Beta-blockers can also slightly raise potassium, and the hydrochlorothiazide component may alter glucose and lipid effects.
What this interaction means in plain words
Hydrochlorothiazide-irbesartan and Penbutolol 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 pharmacodynamic effects through different pathways, with a small beta-blocker effect on potassium shifts.
What to do
Monitor blood pressure, heart rate and serum potassium when starting or titrating the combination. Adjust doses if symptomatic hypotension occurs.
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 Hydrochlorothiazide-irbesartan and Penbutolol, 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 Hydrochlorothiazide-irbesartan
- Aliskiren + Hydrochlorothiazide-irbesartan Contraindicated
- Dofetilide + Hydrochlorothiazide-irbesartan Contraindicated
- Hydrochlorothiazide-irbesartan + Sparsentan Contraindicated
- Aldesleukin + Hydrochlorothiazide-irbesartan Major
- Amifostine + Hydrochlorothiazide-irbesartan Major
- Amiloride + Hydrochlorothiazide-irbesartan Major
Frequently asked questions
Can I take Hydrochlorothiazide-irbesartan with Penbutolol?
MediHelp rates the interaction as minor. Hydrochlorothiazide-irbesartan and Penbutolol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Combining a beta-blocker with an ARB and a thiazide produces additive blood pressure lowering, which is often intended but may cause hypotension, dizziness or bradycardia. Beta-blockers can also slightly raise potassium, and the hydrochlorothiazide component may alter glucose and lipid effects.
How serious is the interaction between Hydrochlorothiazide-irbesartan and Penbutolol?
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, heart rate and serum potassium when starting or titrating the combination. Adjust doses if symptomatic hypotension occurs.
What other medicines interact with Hydrochlorothiazide-irbesartan?
MediHelp also lists interactions of Hydrochlorothiazide-irbesartan with, for example, Aliskiren, Dofetilide, Sparsentan. The full list is on the Hydrochlorothiazide-irbesartan 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.
