Drug interactions
Fluoxetine + Lsd
Severity: Moderate
Fluoxetine and Lsd: 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
LSD acts on serotonin receptors, and SSRIs generally blunt its subjective effects through receptor downregulation. Serotonin syndrome is a theoretical concern, and unpredictable psychological effects may occur.
What this interaction means in plain words
Fluoxetine and Lsd 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
Serotonergic receptor interaction; chronic SSRI use may reduce 5-HT2A responsiveness, though the exact interaction is not fully established.
What to do
Advise against combined use outside supervised research settings. Monitor for serotonin toxicity and agitation if exposure occurs.
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 Lsd?
MediHelp rates the interaction as moderate. Fluoxetine and Lsd 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. LSD acts on serotonin receptors, and SSRIs generally blunt its subjective effects through receptor downregulation. Serotonin syndrome is a theoretical concern, and unpredictable psychological effects may occur.
How serious is the interaction between Fluoxetine and Lsd?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise against combined use outside supervised research settings. Monitor for serotonin toxicity and agitation if exposure occurs.
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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