Antihistamine
Levocetirizine
Tablet or syrup
Quick Summary
Levocetirizine works in the same way as cetirizine.
Allergic rhinitis
Hives
Medical Uses
Allergic rhinitis: Year-round and seasonal.
Hives: Chronic urticaria.
How it's taken
Usually taken once a day, often in the evening.
Your doctor decides the right dose for you and how long to take it.
Your doctor decides the right dose for you. Follow their instructions and the label.
Common Side Effects
Drowsiness
Sometimes.
Dry mouth
Sometimes.
Tiredness
Mild.
Interactions
Alcohol
Increases drowsiness.
Critical Warnings
Driving
Check how it affects you first.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Levocetirizine: drug information(opens in a new tab) · MedlinePlus, US National Library of Medicine