Drug interactions
Atenolol + Saquinavir
Severity: Major
Atenolol and Saquinavir: 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
Saquinavir can prolong the PR and QT intervals, and atenolol slows AV conduction. The combination may increase the risk of AV block and arrhythmia.
What this interaction means in plain words
Atenolol and Saquinavir 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.
Why it happens
Additive effects on cardiac conduction; atenolol is not significantly CYP-metabolized so the effect is pharmacodynamic.
What to do
Obtain a baseline ECG and monitor PR interval and heart rate. Consider an alternative antihypertensive if conduction abnormalities develop.
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?
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Other interactions of Atenolol
- Amifostine + Atenolol Major
- Amiodarone + Atenolol Major
- Atenolol + Atenolol-chlorthalidone Major
- Atenolol + Betaxolol Major
- Atenolol + Bisoprolol Major
- Atenolol + Carvedilol Major
Frequently asked questions
Can I take Atenolol with Saquinavir?
MediHelp rates the interaction as major. Atenolol and Saquinavir 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. Saquinavir can prolong the PR and QT intervals, and atenolol slows AV conduction. The combination may increase the risk of AV block and arrhythmia.
How serious is the interaction between Atenolol and Saquinavir?
MediHelp rates it major, 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. Consider an alternative antihypertensive if conduction abnormalities develop.
What other medicines interact with Atenolol?
MediHelp also lists interactions of Atenolol with, for example, Amifostine, Amiodarone, Atenolol-chlorthalidone. The full list is on the Atenolol page.
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