Drug interactions
Lsd + Paroxetine
Severity: Moderate
Lsd and Paroxetine: 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 combining it with an SSRI may raise the risk of serotonin toxicity. Chronic SSRI use is usually reported to blunt the effects of LSD, so the clinical picture is unpredictable.
What this interaction means in plain words
Lsd and Paroxetine 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 effects from 5-HT receptor agonism combined with SSRI reuptake inhibition; SSRI-induced receptor downregulation may reduce LSD effects.
What to do
Advise against use of LSD in patients taking paroxetine. Treat suspected serotonin syndrome with supportive care and stop serotonergic agents.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Lsd and Paroxetine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Paroxetine
- Isocarboxazid + Paroxetine Contraindicated
- Methylene blue + Paroxetine Contraindicated
- Paroxetine + Phenelzine Contraindicated
- Paroxetine + Pimozide Contraindicated
- Paroxetine + Procarbazine Contraindicated
- Paroxetine + Selegiline Contraindicated
Frequently asked questions
Can I take Lsd with Paroxetine?
MediHelp rates the interaction as moderate. Lsd and Paroxetine 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 combining it with an SSRI may raise the risk of serotonin toxicity. Chronic SSRI use is usually reported to blunt the effects of LSD, so the clinical picture is unpredictable.
How serious is the interaction between Lsd and Paroxetine?
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 use of LSD in patients taking paroxetine. Treat suspected serotonin syndrome with supportive care and stop serotonergic agents.
What other medicines interact with Paroxetine?
MediHelp also lists interactions of Paroxetine with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Paroxetine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
