How does cetirizine work?
Cetirizine blocks histamine receptors, preventing histamine from triggering allergy symptoms like itching, swelling, and sneezing.
What is cetirizine used to treat?
Cetirizine is commonly used for:
- Hay fever (seasonal allergic rhinitis)
- Hives (urticaria)
- Itchy skin and allergic reactions
- Reactions to insect bites or stings
Who can take cetirizine?
Cetirizine is suitable for most adults and children over 2 years old for allergies and over 6 years old for hay fever.
Who might not be able to take cetirizine?
Cetirizine may not be suitable if you:
- Have severe kidney disease
- Have a history of severe allergic reactions to antihistamines
- Are taking other medications that cause drowsiness
Can I take cetirizine if I’m pregnant or breastfeeding?
Cetirizine is sometimes recommended during pregnancy and breastfeeding, but always check with your doctor first.
What if I miss a dose?
If you forget a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed one—do not take two doses at once.
How effective is cetirizine?
Cetirizine is highly effective at relieving allergy symptoms and usually starts working within 30 minutes to 1 hour.
What should I do if I take too much?
Taking too much cetirizine may cause drowsiness, dizziness, or dry mouth. If you feel unwell, seek medical advice.
What dose of cetirizine is usually taken?
- For adults and children over 12: 10mg once daily
- For children aged 6-12: 5mg twice daily
- For children aged 2-6: 2.5mg twice daily
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What are the side effects of cetirizine?
Common side effects include:
Serious side effects, such as swelling of the face or difficulty breathing, require urgent medical attention.
How should I take cetirizine?
Cetirizine is taken as tablets, liquid, or dissolvable tablets, usually once daily.
When should cetirizine be taken?
Cetirizine can be taken at any time of the day, but some people prefer to take it in the evening if it makes them drowsy.
What are the brand names for cetirizine?
Cetirizine is available as a generic medicine, but some branded versions include:
- Zirtek
- Piriteze
- Benadryl Allergy Relief
Final thoughts
Cetirizine is an effective antihistamine for managing allergies and skin reactions. To get the best results, take it as directed and avoid alcohol if it makes you drowsy. If symptoms persist or side effects occur, speak to your doctor or pharmacist.
