Drug interactions
Atenolol + Atenolol-chlorthalidone
Severity: Major
Atenolol and Atenolol-chlorthalidone: major 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
The combination product already contains atenolol, so adding atenolol duplicates therapy. This leads to excess beta-blockade, with bradycardia, hypotension and fatigue.
What this interaction means in plain words
Atenolol and Atenolol-chlorthalidone can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Atenolol belongs to Cardiovascular; Atenolol-chlorthalidone belongs to Cardiovascular.
Why it happens
Therapeutic duplication of beta-1 adrenergic blockade leading to additive pharmacodynamic effects.
What to do
Avoid concurrent use; prescribe a single atenolol-containing product and adjust the dose by heart rate and blood pressure.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Atenolol and Atenolol-chlorthalidone, 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 Atenolol-chlorthalidone
Other interactions of Atenolol
- Amifostine + Atenolol Major
- Amiodarone + Atenolol Major
- Atenolol + Betaxolol Major
- Atenolol + Bisoprolol Major
- Atenolol + Carvedilol Major
- Atenolol + Clonidine Major
Frequently asked questions
Can I take Atenolol with Atenolol-chlorthalidone?
MediHelp rates the interaction as major. Atenolol and Atenolol-chlorthalidone can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. The combination product already contains atenolol, so adding atenolol duplicates therapy. This leads to excess beta-blockade, with bradycardia, hypotension and fatigue.
How serious is the interaction between Atenolol and Atenolol-chlorthalidone?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use; prescribe a single atenolol-containing product and adjust the dose by heart rate and blood pressure.
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.
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.
