Drug interactions
Lsd + Mirtazapine
Severity: Moderate
Lsd and Mirtazapine: 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 is a serotonergic hallucinogen acting mainly at 5-HT2A receptors. Mirtazapine antagonizes 5-HT2A and may blunt its effects, so the main concern is unpredictable responses rather than a clear serotonin toxicity risk. Evidence is limited, and LSD is an illicit substance with unpredictable effects.
What this interaction means in plain words
Lsd and Mirtazapine 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
Pharmacodynamic interaction at serotonin receptors; mirtazapine's 5-HT2A antagonism may reduce LSD effects.
What to do
Advise patients to avoid LSD, and monitor for agitation, hyperthermia or autonomic instability 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 Mirtazapine
- Isocarboxazid + Mirtazapine Contraindicated
- Mirtazapine + Phenelzine Contraindicated
- Mirtazapine + Pimozide Contraindicated
- Mirtazapine + Procarbazine Contraindicated
- Mirtazapine + Rasagiline Contraindicated
- Mirtazapine + Selegiline Contraindicated
Frequently asked questions
Can I take Lsd with Mirtazapine?
MediHelp rates the interaction as moderate. Lsd and Mirtazapine 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 is a serotonergic hallucinogen acting mainly at 5-HT2A receptors. Mirtazapine antagonizes 5-HT2A and may blunt its effects, so the main concern is unpredictable responses rather than a clear serotonin toxicity risk. Evidence is limited, and LSD is an illicit substance with unpredictable effects.
How serious is the interaction between Lsd and Mirtazapine?
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 patients to avoid LSD, and monitor for agitation, hyperthermia or autonomic instability if exposure occurs.
What other medicines interact with Mirtazapine?
MediHelp also lists interactions of Mirtazapine with, for example, Isocarboxazid, Phenelzine, Pimozide. The full list is on the Mirtazapine page.
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