Drug interactions
Diazepam intranasal + Mirtazapine
Severity: Moderate
Diazepam intranasal 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
Diazepam and mirtazapine both depress the CNS, so combined use can increase drowsiness, impair coordination and reduce alertness. Intranasal diazepam is used for acute seizures, where oversedation could complicate recovery monitoring.
What this interaction means in plain words
Diazepam intranasal 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
Additive CNS depression from GABA-A enhancement and H1 antagonism.
What to do
Monitor sedation and respiration after diazepam dosing, and adjust mirtazapine if oversedation occurs. Advise avoiding alcohol and driving.
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 Diazepam intranasal and Mirtazapine, 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 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 Diazepam intranasal with Mirtazapine?
MediHelp rates the interaction as moderate. Diazepam intranasal 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. Diazepam and mirtazapine both depress the CNS, so combined use can increase drowsiness, impair coordination and reduce alertness. Intranasal diazepam is used for acute seizures, where oversedation could complicate recovery monitoring.
How serious is the interaction between Diazepam intranasal 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: Monitor sedation and respiration after diazepam dosing, and adjust mirtazapine if oversedation occurs. Advise avoiding alcohol and driving.
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.
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.
