Drug interactions
Artemether + Quinidine
Severity: Major
Artemether and Quinidine: 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
Both quinidine and artemether (usually given with lumefantrine) can prolong the QT interval. Combined use may increase the risk of torsades de pointes.
What this interaction means in plain words
Artemether and Quinidine 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; quinidine may also inhibit CYP2D6 and CYP3A4 and affect artemether-lumefantrine metabolism.
What to do
Avoid the combination where possible; if it cannot be avoided, obtain an ECG and correct potassium and magnesium. Monitor for palpitations, syncope or QT lengthening.
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 Quinidine
- Adagrasib + Quinidine Contraindicated
- Arsenic trioxide + Quinidine Contraindicated
- Artemether / lumefantrine + Quinidine Contraindicated
- Chloroquine + Quinidine Contraindicated
- Dofetilide + Quinidine Contraindicated
- Dronedarone + Quinidine Contraindicated
Frequently asked questions
Can I take Artemether with Quinidine?
MediHelp rates the interaction as major. Artemether and Quinidine 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. Both quinidine and artemether (usually given with lumefantrine) can prolong the QT interval. Combined use may increase the risk of torsades de pointes.
How serious is the interaction between Artemether and Quinidine?
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 the combination where possible; if it cannot be avoided, obtain an ECG and correct potassium and magnesium. Monitor for palpitations, syncope or QT lengthening.
What other medicines interact with Quinidine?
MediHelp also lists interactions of Quinidine with, for example, Adagrasib, Arsenic trioxide, Artemether / lumefantrine. The full list is on the Quinidine page.
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