Cetirizine Dose Calculator
for Children
Calculate a practical weight-based cetirizine 5 mg/5 mL dose, with Malaysian age-based dosing shown separately for reference.
Cetirizine 5 mg/5 mL
Cetirizine age-based dosing
Malaysian FUKKM and registered Malaysian product information.
| Patient | Dose | Frequency |
|---|---|---|
| 1–<2 years | 2.5 mg (2.5 mL) | BD |
| 2–6 years | 5 mg/day | 5 mL OD or 2.5 mL BD |
| >6–12 years | 10 mg/day | 10 mL OD or 5 mL BD |
The table shows the practical age bands separately from the weight-based calculator above.
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Practical dosing notes
Cetirizine paediatric-dose FAQ
What is the cetirizine dose for a child aged 2–6 years?
Current FUKKM gives 5 mg once daily or 2.5 mg twice daily. With a 5 mg/5 mL liquid, those correspond to 5 mL OD or 2.5 mL BD.
What is the cetirizine dose above age 6 years?
Current FUKKM gives 10 mg daily or 5 mg twice daily. With a 5 mg/5 mL liquid, the once-daily option is 10 mL OD.
What is the cetirizine dose at age 1–2 years?
The cited Malaysian NPRA CERITEC product insert gives 2.5 mg (2.5 mL) twice daily for children aged 1 to 2 years.
What liquid strength is used?
The calculator uses 5 mg/5 mL, equivalent to 1 mg/mL.
Clinical references
- IWK Health — Pediatric Drug Dosing Guidelines: Cetirizine — weight-based antihistamine dose 0.25 mg/kg/dose PO, maximum 10 mg/dose; syrup 1 mg/mL.
- A stepwise approach in the management of chronic spontaneous urticaria in children — published paediatric dosing algorithm listing cetirizine 0.25 mg/kg once or twice daily with oral solution 1 mg/mL.
- Ministry of Health Malaysia — Formulari Ubat KKM (FUKKM): Cetirizine HCl — age-banded dosing from age 2 years.
- NPRA — CERITEC Syrup 1 mg/mL Malaysian Product Insert — registered liquid strength and paediatric age-based dosing.
For healthcare professionals. Weight-based and age-based regimens come from the sources listed above. Confirm the patient, indication, age, formulation, renal status and current source information before prescribing.