Drug interactions
Brimonidine + Cetirizine
Severity: Minor
Brimonidine and Cetirizine: minor 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
Brimonidine as eye drops has minimal systemic absorption, though it can cause drowsiness in some patients. Added sedation with cetirizine is possible but typically small.
What this interaction means in plain words
Brimonidine and Cetirizine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Brimonidine belongs to Miscellaneous; Cetirizine belongs to Respiratory.
Why it happens
Potential additive CNS depression via alpha-2 agonism from systemic brimonidine and antihistamine effect.
What to do
No routine action; counsel patients to be careful when driving if drowsiness develops.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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
Other interactions of Brimonidine
- Brimonidine + Isocarboxazid Contraindicated
- Brimonidine + Linezolid Contraindicated
- Brimonidine + Phenelzine Contraindicated
- Brimonidine + Procarbazine Contraindicated
- Brimonidine + Rasagiline Contraindicated
- Brimonidine + Selegiline Contraindicated
Frequently asked questions
Can I take Brimonidine with Cetirizine?
MediHelp rates the interaction as minor. Brimonidine and Cetirizine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Brimonidine as eye drops has minimal systemic absorption, though it can cause drowsiness in some patients. Added sedation with cetirizine is possible but typically small.
How serious is the interaction between Brimonidine and Cetirizine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine action; counsel patients to be careful when driving if drowsiness develops.
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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