Drug interactions
Atenolol-chlorthalidone + Dipyridamole
Severity: Minor
Atenolol-chlorthalidone and Dipyridamole: 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 raises adenosine levels and can slow heart rate and AV conduction, which may add to atenolol-induced bradycardia. Oral dipyridamole has limited effect, while intravenous use in stress testing carries more risk. Beta-blockers may also mask ischemic symptoms.
What this interaction means in plain words
Atenolol-chlorthalidone and Dipyridamole have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Atenolol-chlorthalidone belongs to Cardiovascular; Dipyridamole belongs to Cardiovascular.
Why it happens
Dipyridamole blocks adenosine reuptake, enhancing adenosine-mediated nodal depression that adds to beta-blockade.
What to do
Monitor heart rate and ECG when using intravenous dipyridamole in patients on atenolol. Beta-blockers are usually held before pharmacologic stress testing as per protocol.
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 Atenolol-chlorthalidone
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 Atenolol-chlorthalidone with Dipyridamole?
MediHelp rates the interaction as minor. Atenolol-chlorthalidone and Dipyridamole 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 raises adenosine levels and can slow heart rate and AV conduction, which may add to atenolol-induced bradycardia. Oral dipyridamole has limited effect, while intravenous use in stress testing carries more risk. Beta-blockers may also mask ischemic symptoms.
How serious is the interaction between Atenolol-chlorthalidone and Dipyridamole?
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 when using intravenous dipyridamole in patients on atenolol. Beta-blockers are usually held before pharmacologic stress testing as per protocol.
What other medicines interact with Atenolol-chlorthalidone?
MediHelp also lists interactions of Atenolol-chlorthalidone with, for example, Acebutolol, Aldesleukin, Amiodarone. The full list is on the Atenolol-chlorthalidone page.
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