Drug interactions
Artemether / lumefantrine + Isoflurane
Severity: Major
Artemether / lumefantrine and Isoflurane: 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
Lumefantrine and artemether both prolong the QT interval, and lumefantrine has a long half-life, so effects persist for days. Isoflurane adds further repolarization delay, which may increase the risk of torsades de pointes.
What this interaction means in plain words
Artemether / lumefantrine and Isoflurane 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 QT interval prolongation.
What to do
Where possible, defer elective anesthesia until after the antimalarial course and its prolonged elimination are complete. If surgery is urgent, obtain an ECG, correct electrolytes and monitor the rhythm continuously.
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 Isoflurane
Frequently asked questions
Can I take Artemether / lumefantrine with Isoflurane?
MediHelp rates the interaction as major. Artemether / lumefantrine and Isoflurane 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. Lumefantrine and artemether both prolong the QT interval, and lumefantrine has a long half-life, so effects persist for days. Isoflurane adds further repolarization delay, which may increase the risk of torsades de pointes.
How serious is the interaction between Artemether / lumefantrine and Isoflurane?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Where possible, defer elective anesthesia until after the antimalarial course and its prolonged elimination are complete. If surgery is urgent, obtain an ECG, correct electrolytes and monitor the rhythm continuously.
What other medicines interact with Isoflurane?
MediHelp also lists interactions of Isoflurane with, for example, Adrenaline-articaine, Amisulpride, Arsenic trioxide. The full list is on the Isoflurane page.
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