Cetirizine
Wal Zyr 24 Hour Allergy is an over-the-counter antihistamine medication used to provide relief from common allergy symptoms such as sneezing, runny nose, itchy/watery eyes, and itching of the nose or throat. The active ingredient cetirizine works by blocking histamine, a substance your body produces during allergic reactions. This once-daily formula is designed for adults and children who need 24-hour allergy relief.
Wal Zyr 24 Hour Allergy is a once-daily antihistamine that relieves common allergy symptoms like sneezing, runny nose, and itchy eyes for up to 24 hours.
Key facts at a glance
- RxNorm
- 1482528
- Generic
- Wal Zyr 24 Hour Allergy
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treats seasonal and year-round allergy symptoms including sneezing, runny nose, itchy nose/throat, and itchy, watery eyes due to hay fever or other respiratory allergies. May also help relieve itching from skin allergies.
Contains cetirizine, a second-generation antihistamine that works by blocking H1 receptors, preventing histamine from causing allergic symptoms. Provides non-drowsy relief for most users.
For oral use only. May cause drowsiness in some individuals; avoid alcohol and use caution when driving until you know how the medication affects you. Consult a doctor before use if pregnant, breastfeeding, or giving to children under a certain age. Do not exceed recommended dosage.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 26, 2026. · Read our editorial policy