Drug interactions
Dipyridamole + Penbutolol
Severity: Minor
Dipyridamole 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
Dipyridamole can increase adenosine levels, which slows AV nodal conduction, and beta blockers such as penbutolol also reduce heart rate and conduction. Together they may cause bradycardia or conduction delay, though reports are sparse.
What this interaction means in plain words
Dipyridamole 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 negative chronotropic and dromotropic effects from beta blockade and adenosine potentiation.
What to do
Monitor heart rate and ECG in patients with baseline conduction disease or bradycardia. Adjust the beta blocker dose if symptomatic bradycardia 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?
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Other interactions of Dipyridamole
- Dipyridamole + Riociguat Contraindicated
- Adenosine + Dipyridamole Major
- Betrixaban + Dipyridamole Major
- Dabigatran + Dipyridamole Major
- Dipyridamole + Regadenoson Major
- Dipyridamole + Venetoclax Major
Frequently asked questions
Can I take Dipyridamole with Penbutolol?
MediHelp rates the interaction as minor. Dipyridamole 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. Dipyridamole can increase adenosine levels, which slows AV nodal conduction, and beta blockers such as penbutolol also reduce heart rate and conduction. Together they may cause bradycardia or conduction delay, though reports are sparse.
How serious is the interaction between Dipyridamole 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 heart rate and ECG in patients with baseline conduction disease or bradycardia. Adjust the beta blocker dose if symptomatic bradycardia occurs.
What other medicines interact with Dipyridamole?
MediHelp also lists interactions of Dipyridamole with, for example, Riociguat, Adenosine, Betrixaban. The full list is on the Dipyridamole page.
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