Drug interactions
Fluoxetine + Sevoflurane
Severity: Moderate
Fluoxetine and Sevoflurane: 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
Both can prolong the QT interval, so sevoflurane anesthesia in a patient taking fluoxetine may add to arrhythmia risk. The clinical effect is generally small in patients without other risk factors.
What this interaction means in plain words
Fluoxetine and Sevoflurane 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.
Fluoxetine belongs to Central Nervous System; Sevoflurane belongs to Central Nervous System.
Why it happens
Additive QT prolongation from ion channel effects.
What to do
Inform the anesthesia team and check baseline ECG and electrolytes preoperatively. Monitor ECG during surgery and avoid adding other QT-prolonging drugs.
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 Fluoxetine
- Fluoxetine + Isocarboxazid Contraindicated
- Fluoxetine + Mavacamten Contraindicated
- Fluoxetine + Methylene blue Contraindicated
- Fluoxetine + Phenelzine Contraindicated
- Fluoxetine + Pimozide Contraindicated
- Fluoxetine + Rasagiline Contraindicated
Other interactions of Sevoflurane
Frequently asked questions
Can I take Fluoxetine with Sevoflurane?
MediHelp rates the interaction as moderate. Fluoxetine and Sevoflurane 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. Both can prolong the QT interval, so sevoflurane anesthesia in a patient taking fluoxetine may add to arrhythmia risk. The clinical effect is generally small in patients without other risk factors.
How serious is the interaction between Fluoxetine and Sevoflurane?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Inform the anesthesia team and check baseline ECG and electrolytes preoperatively. Monitor ECG during surgery and avoid adding other QT-prolonging drugs.
What other medicines interact with Fluoxetine?
MediHelp also lists interactions of Fluoxetine with, for example, Isocarboxazid, Mavacamten, Methylene blue. The full list is on the Fluoxetine page.
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