Drug reference
cetirizine
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.
Drug class
Respiratory (Anti Histamine)
Mechanism of action
Cetirizine, a metabolite of hydroxyzine, is an antihistamine drug. Its effects are achieved through selective inhibition of peripheral H1 receptors.
Common side effects
- Sleepiness
- Malaise
- Bronchospasm
- Headache
- Fatigue
- Dry Mouth
Contraindications
- Hypersensitivity to cetirizine hydrochloride or any of its ingredients, levocetirizine, or hydroxyzine
Known interactions (3)
- cetirizine + Clomipramine Moderate
- cetirizine + Trimeprazine Moderate
- cetirizine + Theophylline Minor
Related conditions
Frequently asked questions
What drug class is cetirizine?
cetirizine belongs to: Respiratory.
How does cetirizine work?
Cetirizine, a metabolite of hydroxyzine, is an antihistamine drug. Its effects are achieved through selective inhibition of peripheral H1 receptors.
What are the common side effects of cetirizine?
Sleepiness, Malaise, Bronchospasm, Headache, Fatigue, Dry Mouth
Which drugs interact with cetirizine?
Clomipramine, Trimeprazine, Theophylline
Full monographs, dosing and an interaction checker in the MediHelp app
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