Drug interactions
Saquinavir + Sotalol
Severity: Major
Saquinavir and Sotalol: 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 boosted with ritonavir prolongs QT and PR intervals, and sotalol also prolongs QT. Together they raise the risk of torsades de pointes and arrhythmia.
What this interaction means in plain words
Saquinavir and Sotalol 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 pharmacodynamic QT prolongation; saquinavir effects on repolarization.
What to do
Avoid if possible and use an alternative antiretroviral. If both are required, obtain baseline and follow-up ECGs and correct electrolytes.
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 Sotalol
- Arsenic trioxide + Sotalol Contraindicated
- Artemether / lumefantrine + Sotalol Contraindicated
- Disopyramide + Sotalol Contraindicated
- Dofetilide + Sotalol Contraindicated
- Dronedarone + Sotalol Contraindicated
- Droperidol + Sotalol Contraindicated
Frequently asked questions
Can I take Saquinavir with Sotalol?
MediHelp rates the interaction as major. Saquinavir and Sotalol 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 boosted with ritonavir prolongs QT and PR intervals, and sotalol also prolongs QT. Together they raise the risk of torsades de pointes and arrhythmia.
How serious is the interaction between Saquinavir and Sotalol?
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 if possible and use an alternative antiretroviral. If both are required, obtain baseline and follow-up ECGs and correct electrolytes.
What other medicines interact with Sotalol?
MediHelp also lists interactions of Sotalol with, for example, Arsenic trioxide, Artemether / lumefantrine, Disopyramide. The full list is on the Sotalol page.
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