What it is used for
- Hay fever (allergic rhinitis)
- Sneezing, runny or itchy nose
- Itchy, watery eyes
- Chronic hives (urticaria) and itchy skin
- Allergy symptoms from pollen, dust, or animals
How it works
Levocetirizine blocks histamine, the chemical that drives allergy symptoms, reducing sneezing, itching, watering, and swelling. It is a refined form of cetirizine.
How it is taken
Comes as tablets and a liquid (often for children). It is taken by mouth, with or without food, often in the evening. Take it exactly as your doctor, pharmacist, or the label directs, and do not exceed the recommended amount.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Drowsiness or tiredness (uncommon but possible)
- Dry mouth
- Headache
- Sore throat or stuffy nose
- Stomach upset
Serious effects — get help
- Signs of a severe allergic reaction (swelling, breathing difficulty)
- Fast or irregular heartbeat
- Difficulty passing urine
- Severe restlessness or agitation
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Alcohol (may increase drowsiness)
- Other sedating medicines
- Other antihistamines or combination allergy products
Who should take care
- Tell your clinician if you are pregnant, planning pregnancy, or breastfeeding
- Caution with kidney problems (dose may need adjusting)
- Avoid if allergic to levocetirizine, cetirizine, or hydroxyzine
- It can cause drowsiness in some people — see how it affects you before driving