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Levocetirizine (Xyzal): uses, dose & side effects

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed

Levocetirizine is a refined antihistamine for allergies, giving relief with generally low drowsiness. It is used for hay fever, hives and itchy allergic symptoms.

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Typical dose — general reference only, NOT a prescription

MeasureRange
CategoryOver-the-counter (OTC)
Adult dose5 mg once daily, often in the evening
Child (paediatric) dose6 months–5 yr: 1.25 mg; 6–11 yr: 2.5 mg; 12 yr+: 5 mg once daily

What it is used for

Common brand names

Common side effects

Before taking it — precautions

When to see a doctor urgently

Doses are a general reference, not a prescription. Doses shown are typical adult/paediatric references and vary with age, weight, kidney/liver function and the exact product. Paediatric doses are usually weight-based and must be set by a doctor. MedDroid cannot prescribe — always confirm levocetirizine and your dose with a doctor or pharmacist and the leaflet inside the pack.

Frequently asked questions

Is levocetirizine non-drowsy?

It is low-sedating for most people, though a minority feel drowsy — taking it at night helps.

How is it different from cetirizine?

It is the active half of cetirizine, so a smaller dose gives similar relief, sometimes with slightly less drowsiness.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.