Drug interactions
quinidine + ritonavir
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.
Overview
↑ quinidine → torsades risk.
Mechanism of action
CYP3A4 inhibition + QT.
Clinical management
Avoid; monitor ECG if unavoidable.
Drug reference
References
Frequently asked questions
Can I take quinidine with ritonavir?
The interaction is rated: Major. ↑ quinidine → torsades risk.
How serious is the interaction between quinidine and ritonavir?
The interaction is rated: Major. Evidence level: High.
How is the interaction between quinidine and ritonavir managed?
Avoid; monitor ECG if unavoidable.
Why do quinidine and ritonavir interact?
CYP3A4 inhibition + QT.
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.