Drug interactions
Buspirone + Fluoxetine
Severity: Moderate
Buspirone and Fluoxetine: 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 and buspirone both enhance serotonergic neurotransmission, so serotonin syndrome is possible, although the combination is sometimes used deliberately. Reports of altered buspirone effect also exist.
What this interaction means in plain words
Buspirone and Fluoxetine 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.
Buspirone belongs to Central Nervous System; Fluoxetine belongs to Central Nervous System.
Why it happens
Additive serotonergic effects from SSRI reuptake inhibition and buspirone 5-HT1A agonism.
What to do
Use low starting doses and monitor for signs of serotonin toxicity after initiation or dose changes; stop one agent if it develops.
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 Buspirone
- Buspirone + Isocarboxazid Contraindicated
- Buspirone + Linezolid Contraindicated
- Buspirone + Phenelzine Contraindicated
- Buspirone + Procarbazine Contraindicated
- Buspirone + Selegiline Contraindicated
- Buspirone + Selegiline transdermal Contraindicated
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 Buspirone with Fluoxetine?
MediHelp rates the interaction as moderate. Buspirone and Fluoxetine 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 and buspirone both enhance serotonergic neurotransmission, so serotonin syndrome is possible, although the combination is sometimes used deliberately. Reports of altered buspirone effect also exist.
How serious is the interaction between Buspirone and Fluoxetine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use low starting doses and monitor for signs of serotonin toxicity after initiation or dose changes; stop one agent if it develops.
What other medicines interact with Buspirone?
MediHelp also lists interactions of Buspirone with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Buspirone page.
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