Levocetirizine: study card

Levocetirizine — H1 antihistamine. Study the mechanism, listed uses and warnings from the US label on one sourced card.

Generic name: Levocetirizine
Class: H1 antihistamine
Mechanism: The active enantiomer of cetirizine selectively inhibits H1 receptors. In vitro, its human H1-receptor affinity was about twice that of cetirizine; the clinical relevance of this comparison is unknown.
Used for: Uncomplicated skin manifestations of chronic idiopathic urticaria in adults and children aged 6 or older
Common side effects: Somnolence; Nasopharyngitis; Fatigue; Dry mouth; Pharyngitis
Warnings: Somnolence; avoid alcohol and CNS depressants; Urinary retention; Pruritus after discontinuation
Interactions: Alcohol / CNS depressants

Brand questions use only name pairings verified against the linked product source. Unverified pairings are withheld from these questions; the other study content remains available.

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Label date: 20260813 · For learning, not clinical decisions. US label and brand information; always consult the current source.

Source snapshot checked: 2026-10-21. The source document and selected fields were compared. The complete card has not had an independent clinical review.

Practice

Pronunciation

Levocetirizine: LEE-voe-se-TIR-i-zeen

Pronunciation is shown for the US English generic name.

Body system

Allergy · 10 Drug cards

Compare with related cards

Cetirizine

Same class on both cards

Mechanism: Metabolite of hydroxyzine; selective peripheral H1-receptor antagonist.

Only on the Cetirizine card: Used for — Hay fever: runny nose, sneezing; Itchy, watery eyes · Common side effects — Drowsiness; Itching after stopping (rare) · Warnings — Allergy to hydroxyzine; Liver or kidney disease: dose review; Drowsiness can impair driving; alcohol, sedatives and tranquilizers can increase it; Itching can occur after cetirizine is stopped; the selected label advises contacting a healthcare professional · Interactions — Alcohol; Sedatives and tranquilizers

An item counts as shared only when both cards use the same wording. If a card does not list an item, that is not a statement that the effect never occurs.