Drug interactions
Desflurane + Ondansetron
Severity: Moderate
Desflurane and Ondansetron: moderate 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
Volatile anesthetics such as desflurane can prolong the QT interval, and ondansetron is often given perioperatively. Together they may raise the risk of arrhythmia, particularly with electrolyte disturbances or congenital long QT.
What this interaction means in plain words
Desflurane and Ondansetron can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Desflurane belongs to Central Nervous System; Ondansetron belongs to Gastrointestinal Tract.
Why it happens
Additive QT prolongation through effects on cardiac repolarization.
What to do
Review the preoperative ECG and correct electrolytes in at-risk patients. Use a different antiemetic in known long QT syndrome and monitor the ECG during anesthesia.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Ondansetron
- Apomorphine + Ondansetron Contraindicated
- Ondansetron + Thioridazine Contraindicated
- Ondansetron + Vandetanib Contraindicated
- Adagrasib + Ondansetron Major
- Amiodarone + Ondansetron Major
- Amisulpride + Ondansetron Major
Other interactions of Desflurane
Frequently asked questions
Can I take Desflurane with Ondansetron?
MediHelp rates the interaction as moderate. Desflurane and Ondansetron can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Volatile anesthetics such as desflurane can prolong the QT interval, and ondansetron is often given perioperatively. Together they may raise the risk of arrhythmia, particularly with electrolyte disturbances or congenital long QT.
How serious is the interaction between Desflurane and Ondansetron?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Review the preoperative ECG and correct electrolytes in at-risk patients. Use a different antiemetic in known long QT syndrome and monitor the ECG during anesthesia.
What other medicines interact with Ondansetron?
MediHelp also lists interactions of Ondansetron with, for example, Apomorphine, Thioridazine, Vandetanib. The full list is on the Ondansetron page.
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