Drug interactions
Cetirizine + Gabapentin
Severity: Minor
Cetirizine and Gabapentin: 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
Both drugs can cause drowsiness and impaired psychomotor performance, and gabapentin carries a labeled warning for respiratory depression when combined with other CNS depressants. Cetirizine is less sedating than older antihistamines, so the additive effect is usually modest, but it may matter in elderly patients, those with renal impairment, or those with respiratory disease.
What this interaction means in plain words
Cetirizine and Gabapentin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Cetirizine belongs to Respiratory; Gabapentin belongs to Central Nervous System.
Why it happens
Additive central nervous system depression through pharmacodynamic synergism.
What to do
Start with the lowest effective doses and counsel the patient about sedation and driving. Monitor elderly or renally impaired patients and those with respiratory compromise for excess sedation or slowed breathing.
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 Gabapentin
Frequently asked questions
Can I take Cetirizine with Gabapentin?
MediHelp rates the interaction as minor. Cetirizine and Gabapentin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Both drugs can cause drowsiness and impaired psychomotor performance, and gabapentin carries a labeled warning for respiratory depression when combined with other CNS depressants. Cetirizine is less sedating than older antihistamines, so the additive effect is usually modest, but it may matter in elderly patients, those with renal impairment, or those with respiratory disease.
How serious is the interaction between Cetirizine and Gabapentin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Start with the lowest effective doses and counsel the patient about sedation and driving. Monitor elderly or renally impaired patients and those with respiratory compromise for excess sedation or slowed breathing.
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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