Drug interactions
Cetirizine + Diazepam intranasal
Severity: Moderate
Cetirizine and Diazepam intranasal: 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 is a benzodiazepine with significant sedative and respiratory depressant effects, and cetirizine can add drowsiness. The combination may impair alertness, especially in elderly patients.
What this interaction means in plain words
Cetirizine and Diazepam intranasal 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 via GABA-A potentiation and H1 receptor blockade.
What to do
Monitor for sedation and respiratory depression, and avoid alcohol. Reduce doses or select a nonsedating alternative if oversedation 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 Cetirizine
- Acrivastine + Cetirizine Moderate
- Amisulpride + Cetirizine Moderate
- Asenapine + Cetirizine Moderate
- Avapritinib + Cetirizine Moderate
- Benzhydrocodone / acetaminophen + Cetirizine Moderate
- Brexpiprazole + Cetirizine Moderate
Frequently asked questions
Can I take Cetirizine with Diazepam intranasal?
MediHelp rates the interaction as moderate. Cetirizine and Diazepam intranasal 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 is a benzodiazepine with significant sedative and respiratory depressant effects, and cetirizine can add drowsiness. The combination may impair alertness, especially in elderly patients.
How serious is the interaction between Cetirizine and Diazepam intranasal?
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 for sedation and respiratory depression, and avoid alcohol. Reduce doses or select a nonsedating alternative if oversedation occurs.
What other medicines interact with Cetirizine?
MediHelp also lists interactions of Cetirizine with, for example, Acrivastine, Amisulpride, Asenapine. The full list is on the Cetirizine page.
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