Drug interactions
Fluoxetine + Midazolam intranasal
Severity: Moderate
Fluoxetine and Midazolam intranasal: 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
Fluoxetine may modestly raise midazolam exposure through CYP3A4 inhibition, prolonging sedation. Both agents also depress the CNS, which may increase the risk of hypoventilation or oxygen desaturation.
What this interaction means in plain words
Fluoxetine and Midazolam intranasal 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.
Why it happens
Weak CYP3A4 inhibition by fluoxetine and norfluoxetine plus additive CNS depression.
What to do
Monitor sedation level, respiratory rate and oxygen saturation after midazolam dosing. Allow longer observation and avoid repeat dosing too early.
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
Frequently asked questions
Can I take Fluoxetine with Midazolam intranasal?
MediHelp rates the interaction as moderate. Fluoxetine and Midazolam intranasal 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 may modestly raise midazolam exposure through CYP3A4 inhibition, prolonging sedation. Both agents also depress the CNS, which may increase the risk of hypoventilation or oxygen desaturation.
How serious is the interaction between Fluoxetine and Midazolam intranasal?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor sedation level, respiratory rate and oxygen saturation after midazolam dosing. Allow longer observation and avoid repeat dosing too early.
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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