Drug interactions
Atenolol + Penbutolol
Severity: Moderate
Atenolol 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
Two beta-blockers given together duplicate therapy and raise the risk of bradycardia, hypotension and AV conduction block without additional benefit.
What this interaction means in plain words
Atenolol 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
Additive beta-adrenergic blockade (therapeutic duplication).
What to do
Avoid combining; use a single beta-blocker. Monitor heart rate and blood pressure if concurrent use occurred.
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 Atenolol
- Amifostine + Atenolol Major
- Amiodarone + Atenolol Major
- Atenolol + Atenolol-chlorthalidone Major
- Atenolol + Betaxolol Major
- Atenolol + Bisoprolol Major
- Atenolol + Carvedilol Major
Frequently asked questions
Can I take Atenolol with Penbutolol?
MediHelp rates the interaction as moderate. Atenolol 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. Two beta-blockers given together duplicate therapy and raise the risk of bradycardia, hypotension and AV conduction block without additional benefit.
How serious is the interaction between Atenolol 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: Avoid combining; use a single beta-blocker. Monitor heart rate and blood pressure if concurrent use occurred.
What other medicines interact with Atenolol?
MediHelp also lists interactions of Atenolol with, for example, Amifostine, Amiodarone, Atenolol-chlorthalidone. The full list is on the Atenolol page.
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