Drug interactions
Lemborexant + Mirtazapine
Severity: Moderate
Lemborexant 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
Both drugs cause sedation, so combined use may increase somnolence and next-day psychomotor impairment. Mirtazapine is at most a weak CYP3A4 inhibitor, so the pharmacodynamic effect is the main concern.
What this interaction means in plain words
Lemborexant 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.
Lemborexant belongs to Central Nervous System; Mirtazapine belongs to Central Nervous System.
Why it happens
Additive CNS depression from orexin receptor antagonism and mirtazapine antihistaminic sedation.
What to do
Start with the lowest lemborexant dose and monitor for daytime drowsiness. Counsel patients about driving and reduce doses if impairment 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
Other interactions of Lemborexant
Frequently asked questions
Can I take Lemborexant with Mirtazapine?
MediHelp rates the interaction as moderate. Lemborexant 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. Both drugs cause sedation, so combined use may increase somnolence and next-day psychomotor impairment. Mirtazapine is at most a weak CYP3A4 inhibitor, so the pharmacodynamic effect is the main concern.
How serious is the interaction between Lemborexant 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: Start with the lowest lemborexant dose and monitor for daytime drowsiness. Counsel patients about driving and reduce doses if impairment 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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