Drug interactions
Atenolol-chlorthalidone + Saquinavir
Severity: Moderate
Atenolol-chlorthalidone and Saquinavir: 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
Saquinavir can prolong the PR and QT intervals, and atenolol slows AV nodal conduction. Together they may increase the risk of conduction block and arrhythmias.
What this interaction means in plain words
Atenolol-chlorthalidone and Saquinavir 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 effects on cardiac conduction from beta-blockade and saquinavir-related PR/QT prolongation.
What to do
Obtain a baseline ECG and monitor PR interval and heart rate. Avoid in patients with existing conduction disease.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Atenolol-chlorthalidone and Saquinavir, 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 7 days on the web. No card needed.
Other interactions of Atenolol-chlorthalidone
Frequently asked questions
Can I take Atenolol-chlorthalidone with Saquinavir?
MediHelp rates the interaction as moderate. Atenolol-chlorthalidone and Saquinavir 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. Saquinavir can prolong the PR and QT intervals, and atenolol slows AV nodal conduction. Together they may increase the risk of conduction block and arrhythmias.
How serious is the interaction between Atenolol-chlorthalidone and Saquinavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and monitor PR interval and heart rate. Avoid in patients with existing conduction disease.
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.
