Drug interactions
Carvedilol + Penbutolol
Severity: Moderate
Carvedilol 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
Using two beta-blockers together duplicates therapy and increases the risk of bradycardia, hypotension and AV block without added benefit.
What this interaction means in plain words
Carvedilol 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 receptor blockade.
What to do
Avoid duplication and use a single beta-blocker. If both are given, monitor heart rate, blood pressure and ECG.
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 Carvedilol
Frequently asked questions
Can I take Carvedilol with Penbutolol?
MediHelp rates the interaction as moderate. Carvedilol 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. Using two beta-blockers together duplicates therapy and increases the risk of bradycardia, hypotension and AV block without added benefit.
How serious is the interaction between Carvedilol 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 duplication and use a single beta-blocker. If both are given, monitor heart rate, blood pressure and ECG.
What other medicines interact with Carvedilol?
MediHelp also lists interactions of Carvedilol with, for example, Amifostine, Amiodarone, Arformoterol. The full list is on the Carvedilol page.
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