How to Calculate Cephradine 125 mg/5 mL (suspension) Dose

This calculator determines the Cephradine dose for treating bacterial infections, using a concentration of Cephradine 125 mg/5 mL (25 mg/mL), based on the patient’s weight and dosage regimen:

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

Volume Calculation:

Where:

• Weight: Patient’s weight in kilograms or pounds (minimum ~5 kg for pediatric ≥ 9 months, automatically converted to kg).
• Dosage Regimen: Select between 25–50 mg/kg/day (BID or QID) or 75–100 mg/kg/day (BID or QID).
• Concentration: Cephradine 25 mg/mL (125 mg/5 mL).

For adults, the usual dose is 500 to 1000 mg po every 6 to 12 hours (Max 4 g/day). Administer for 7–10 days, or as directed. ⚠️ Always consult a healthcare provider.

Using the Cephradine 125 mg/5 mL (suspension) Dosage Calculator

Enter the patient’s weight, select the weight unit (kg or lb), and choose the dosage regimen (25–50 mg/kg/day BID/QID or 75–100 mg/kg/day BID/QID). The calculator provides the minimum and maximum dose in mL and mg per dose for pediatric patients (≥ 9 months) or adults.

Example: Weight 11 kg, 25 to 50 mg/kg/day BID:

Pediatric ≥ 9 months:
Min Dose: 5.5 mL (138 mg) PO BID
Max Dose: 11 mL (275 mg) PO BID

Adults:
Usual dose is 500 to 1000 mg po every 6 to 12 hours (Max 4 g/day)

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

Consult a healthcare provider before administering.

Frequently Asked Questions (FAQ)

1. What is Cephradine used for?

Cephradine (Velosef; Intracef) treats bacterial infections, including respiratory infections, skin infections, and urinary tract infections.

2. How often is this given?

Pediatric: BID or QID, depending on the dose (25 to 100 mg/kg/day). Adults: Every 6 to 12 hours, 500 to 1000 mg po (Max 4 g/day).

3. Can this be used for infants under 9 months?

Consult a doctor, as Cephradine (Velosef; Intracef) is not typically recommended for infants under 9 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 500 to 1000 mg po every 6 to 12 hours (Max 4 g/day).