How to Calculate Cetirizine 5 mg/5 mL (suspension) Dose

This calculator determines the Cetirizine dose for treating allergies, using a concentration of Cetirizine 5 mg/5 mL (1 mg/mL), based on the patient’s weight and age group:

Dose in mg and Volume in mL (based on Cetirizine component):

Volume Calculation:

Where:

• Weight: Patient’s weight in kilograms or pounds (minimum ~5 kg for pediatric patients, automatically converted to kg).
• Age Group: Select the appropriate age range (6–23 months, 2–5 years, or 6–12 years and adults).
• Concentration: Cetirizine 1 mg/mL (5 mg/5 mL).

Administer as directed, typically for allergy relief. ⚠️ Always consult a healthcare provider.

Using the Cetirizine 5 mg/5 mL (suspension) Dosage Calculator

Enter the patient’s weight, select the weight unit (kg or lb), and choose the age group (6–23 months, 2–5 years, or 6–12 years and adults). The calculator provides the dose in mL and mg based on the age-specific regimen.

Example: Weight 12 kg, Age 6 to 23 months:

Dosage:
2.5 mL (2.5 mg) po once daily

Calculations must be re-checked and should not be used alone...
            

Consult a healthcare provider before administering.

Frequently Asked Questions (FAQ)

1. What is Cetirizine used for?

Cetirizine (Reactine; Zyrtec; Incidal) is used to treat allergy symptoms, such as hay fever, hives, and itching.

2. How often is this given?

Depends on age: 2.5 mg once daily (6–23 months), 5 mg once daily or 2.5 mg BID (2–5 years), 10 mg once daily or 5 mg BID (6–12 years and adults).

3. Can this be used for infants under 6 months?

Consult a doctor, as Cetirizine (Reactine; Zyrtec; Incidal) is not typically recommended for infants under 6 months without medical supervision.

4. What if weight is in pounds?

Enter the weight in pounds, and the calculator will automatically convert it to kilograms for calculation (1 lb = 0.4536 kg approximately).

5. What’s the adult dose?

Usual dose is 10 mg (10 mL) po once daily or 5 mg (5 mL) BID.