Azithromycin 100 mg/5 mL (suspension) Dosage Calculator

How to Calculate Azithromycin 100 mg/5 mL (suspension) Dose

This calculator determines the Azithromycin dose for treating bacterial infections, using a concentration of Azithromycin 100 mg/5 mL (20 mg/mL), based on the patient’s weight and dosage regimen:

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

Option 1: Day 1: 10 mg/kg, Days 2-5: 5 mg/kg (pediatric ≥ 6 months)

Option 2: 12 mg/kg/day for 5 days (pediatric ≥ 2 years)

Volume Calculation:

Volume (mL) = Azithromycin Dose (mg) ÷ 20 mg/mL

Where:

Weight: Patient’s weight in kilograms (minimum ~5 kg for pediatric ≥ 6 months).
Dosage Regimen: Select between Day 1: 10 mg/kg & Day 2-5: 5 mg/kg, or 12 mg/kg/day for 5 days.
Concentration: Azithromycin 20 mg/mL (100 mg/5 mL).

For adults, use 500 mg po for one dose on Day 1, then 250 mg po once daily on Days 2-5. Administer for 5 days, or as directed. ⚠️ Always consult a healthcare provider.

Using the Azithromycin 100 mg/5 mL (suspension) Dosage Calculator

Enter the patient’s weight, select the dosage regimen (Day 1: 10 mg/kg & Day 2-5: 5 mg/kg, or 12 mg/kg/day for 5 days). The calculator provides the dose in mL and mg per dose for pediatric patients (≥ 6 months or ≥ 2 years) or adults.

Example: Weight 15 kg, Day 1: 10 mg/kg & Day 2-5: 5 mg/kg:

Pediatric ≥ 6 months:
Day 1: 7.5 mL (150 mg) po for one dose then
Day 2 to 5: 3.8 mL (75 mg) po once daily

Adult Dose:
Day 1: 500 mg po for one dose then
Days 2 to 5: 250 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 Azithromycin used for?

Azithromycin treats bacterial infections, including respiratory infections, skin infections, and ear infections.

2. How often is this given?

Pediatric: Once daily for 5 days (either 10 mg/kg on Day 1 and 5 mg/kg on Days 2-5, or 12 mg/kg/day). Adults: Once daily, 500 mg on Day 1, then 250 mg on Days 2-5.

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

Consult a doctor, as dosing for infants under 6 months may differ or require caution.

4. What if weight is in pounds?

This calculator accepts only kilograms, but you can convert pounds to kilograms (1 lb = 0.4536 kg) before entering the weight.

5. What’s the adult dose?

Day 1: 500 mg po for one dose, then Days 2-5: 250 mg po once daily.