Overview
Cetirizine is an oral antihistamine used to relieve allergy symptoms caused by hay fever or other upper respiratory allergies. It helps reduce sneezing, runny nose, itchy and watery eyes, and itching of the nose or throat.
What is it used for?
Cetirizine tablets are indicated to temporarily relieve symptoms associated with indoor and outdoor allergies. These symptoms include:
- Runny nose
- Sneezing
- Itchy, watery eyes
- Itching of the nose or throat
This product is intended for use in adults and children aged 6 years and older.
Active ingredients
Cetirizine hydrochloride USP
How it works
Cetirizine works by blocking histamine H1 receptors in the body, preventing histamine from causing allergy symptoms like sneezing, itching, and watery eyes.
Dosage and administration
Adults and children 6 years and over: Take 1 to 2 tablets (5 mg each) once daily depending on symptom severity; do not exceed 2 tablets in 24 hours.
Adults 65 years and over: Take 1 tablet once daily; do not exceed 1 tablet in 24 hours.
Children under 6 years: Consult a doctor before use.
People with liver or kidney disease: Consult a doctor for appropriate dosing.
For the 10 mg tablet:
Adults and children 6 years and over should take one 10 mg tablet once daily; do not exceed one tablet in 24 hours. A 5 mg tablet may be recommended for less severe symptoms.
Adults 65 years and over, children under 6 years, and those with liver or kidney disease should consult a doctor before use.
Contraindications
Do not use cetirizine if you have had an allergic reaction to this product, its ingredients, or to antihistamines containing hydroxyzine.
Warnings and precautions
- Do not use if you have had an allergic reaction to cetirizine, any ingredients in the product, or to antihistamines containing hydroxyzine.
- If you have liver or kidney disease, consult your doctor for dose adjustments.
- Taking tranquilizers or sedatives may increase drowsiness caused by cetirizine.
- Avoid alcoholic drinks while using this product as alcohol can increase drowsiness.
- Be cautious when driving or operating machinery because cetirizine may cause drowsiness.
- If an allergic reaction to cetirizine occurs, seek medical help immediately.
- Not recommended during breastfeeding; if pregnant, ask a healthcare professional before use.
- In case of overdose, contact a Poison Control Center or seek medical help right away.
Side effects
Drowsiness may occur during use. Serious allergic reactions can happen but are rare and require immediate medical attention.
Drug interactions
- Alcohol, sedatives, and tranquilizers can increase the sedative effect and drowsiness caused by cetirizine.
Pregnancy and breastfeeding
- Pregnancy: Consult a healthcare professional before use.
- Breastfeeding: Use is not recommended while breastfeeding.
Overdose information
In case of overdose, get medical help or contact a Poison Control Center immediately.
Storage
Store cetirizine tablets between 20° to 25°C (68° to 77°F).
Manufacturer(s)
Medical references
- U.S. National Library of Medicine – DailyMed
- Official prescribing information
- Other authoritative medical references, where applicable
References are used to support the medical information presented on this page.
Medical information disclaimer
The information on WikiDrug is provided for educational and informational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making decisions about medication use.
Last updated November 5, 2026