Drug interactions
Fexinidazole + Isoflurane
Severity: Major
Fexinidazole 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
Fexinidazole can prolong the QT interval and its labeling advises against combination with other QT-prolonging drugs. Isoflurane also has QT-prolonging effects. Together they may increase the risk of torsades de pointes.
What this interaction means in plain words
Fexinidazole 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 prolongation of cardiac repolarization via potassium channel effects.
What to do
Obtain a baseline ECG, correct potassium, magnesium and calcium, and monitor the QTc through the perioperative period. Consider delaying elective surgery or using an alternative anesthetic approach.
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 Fexinidazole with Isoflurane?
MediHelp rates the interaction as major. Fexinidazole 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. Fexinidazole can prolong the QT interval and its labeling advises against combination with other QT-prolonging drugs. Isoflurane also has QT-prolonging effects. Together they may increase the risk of torsades de pointes.
How serious is the interaction between Fexinidazole 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: Obtain a baseline ECG, correct potassium, magnesium and calcium, and monitor the QTc through the perioperative period. Consider delaying elective surgery or using an alternative anesthetic approach.
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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