How to Calculate Erythromycin 400 mg / 5 mL Dose

This calculator determines the Erythromycin dose for treating bacterial infections, using a concentration of Erythromycin 400 mg / 5 mL, based on the patient’s weight and dosage frequency:

Dose in mL and mg (based on Erythromycin component):

Where:

• Patient's Weight: Enter the patient’s weight in kilograms (kg) or pounds (lb) using the dropdown, with precision up to 0.001 units.
• Dosage Frequency: Select QID (4 times daily) or TID (3 times daily) from the dropdown.
• Concentration: Erythromycin 400 mg / 5 mL (80 mg/mL).

Administer as prescribed for bacterial infections. ⚠️ Always consult a healthcare provider.

Using the Erythromycin 400 mg / 5 mL Dosage Calculator

Enter the patient’s weight in kilograms (kg) or pounds (lb) with precision up to 0.001 units, select the weight unit from the dropdown, choose the dosage frequency (QID or TID) from the dropdown, and click "Calculate." The calculator provides the dose in mL and mg for pediatric patients (> 1 month) and adults.

Example: Weight: 4.5 kg or 10 lb, TID:

Pediatric > 1 month:
Min Dose: 1.3 ml (100 mg) PO TID
Max Dose: 2.1 ml (167 mg) PO TID
For severe infections the dose may be doubled

Adult Dose:
250 to 500 mg PO TID to QID

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

Consult a healthcare provider before administering.

Frequently Asked Questions (FAQ)

1. What is Erythromycin used for?

Erythromycin (E.E.S.; Eryc; EryPed; Erythrocin) is used to treat bacterial infections such as respiratory tract infections, skin infections, and ear infections.

2. How often is this given?

Pediatric (> 1 month): 30 to 50 mg/kg/day, divided QID (4 times daily) or TID (3 times daily), Max 2 g/day. Adults: 250 to 500 mg PO TID to QID.

3. Can this be used for infants under 1 month?

Consult a doctor, as Erythromycin is not typically recommended for infants under 1 month without medical supervision.

4. What’s the adult dose?

250 to 500 mg PO TID to QID.