Cetirizine is a popular antihistamine medication in Australia, widely used to relieve allergy symptoms such as hay fever, perennial allergic rhinitis, and chronic hives. Understanding the correct dosage is essential to ensure effectiveness and safety. This blog post provides a clear overview of cetirizine dosing recommendations for different age groups based on Australian clinical guidelines and product information.
Standard Adult Dose
For adults and children aged 12 years and over, the typical cetirizine dose is:
- 10 mg once daily (usually one 10 mg tablet per day), taken with or without food.
- Some adults, particularly those with kidney problems, may require a lower dose, such as 5 mg once daily, as advised by their healthcare provider.
This once-daily dosing provides effective relief from allergy symptoms and is convenient for most users.
Pediatric Dosage
Cetirizine dosing for children varies by age:
- Children aged 6 to 12 years: The recommended dose is 5 mg twice daily (often half a 10 mg tablet twice a day).
- Children aged 2 to 5 years: The dose is typically 2.5 mg twice daily (available as oral liquid or adjusted tablet form).
- Children under 2 years: Cetirizine use is generally not recommended without medical supervision, and dosing is carefully calculated based on weight if prescribed.
How to Take Cetirizine
- Tablets should be swallowed whole with water and can be taken with or without food.
- Liquid formulations come with measuring devices to ensure accurate dosing, especially for children.
- If drowsiness occurs, taking cetirizine in the evening may help reduce daytime sleepiness.
Special Considerations
- Kidney or liver impairment: Dose adjustments may be necessary; always follow your doctor’s advice.
- Pregnancy and breastfeeding: Consult your healthcare provider before use.
- Missed dose: Take the missed dose as soon as you remember unless it is near the time for the next dose. Do not double doses.
- Duration of use: Cetirizine can be taken as needed for short-term symptom relief or regularly during allergy seasons or chronic conditions, depending on your doctor’s recommendation.
Summary
In Australia, cetirizine dosing is straightforward: adults and children over 12 years typically take 10 mg once daily, while younger children receive lower doses adjusted for age and weight. Always follow the instructions on your medication or those given by your healthcare professional to ensure safe and effective allergy relief.