How to Calculate Penicillin V 125 mg/5 mL Dose

This calculator determines the Penicillin V dose for treating bacterial infections, using a concentration of Penicillin V 125 mg/5 mL (25 mg/mL), based on the patient’s weight, age group, and dosing frequency:

Dose in mL and mg (based on Penicillin V):

Where:

• Weight: Enter the patient’s weight in kilograms (kg) or pounds (lb) and select the unit from the dropdown (automatically converted to kg).
• Dosing Frequency: Select TID (3 times/day) or QID (4 times/day).
• Age Group: Select the appropriate age group (Pediatric ≥ 1 month or Adults).
• Concentration: Penicillin V 125 mg/5 mL (25 mg/mL).

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

Using the Penicillin V 125 mg/5 mL Dosage Calculator

Enter the patient’s weight in kilograms or pounds, select the unit, choose the dosing frequency and age group, and click "Calculate." The calculator provides the dose in mL and mg (Penicillin V) for pediatric and adult patients, ensuring the minimum dose (in both mL and mg) is less than or equal to the maximum dose for both groups.

Example: Weight 30 kg, Dosing Frequency QID, Pediatric ≥ 1 month:

Pediatric ≥ 1 month:
Min Dose: 7.5 mL (188 mg) PO QID
Max Dose: 15 mL (375 mg) PO QID

Adult Dose:
12 mL (300 mg) to 24 mL (600 mg) PO QID (Max 3 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 Penicillin V used for?

Penicillin V (Pen VK) is used to treat bacterial infections such as strep throat, pneumonia, and skin infections.

2. How often is this given?

Pediatric ≥ 1 month: 25 to 50 mg/kg/day divided into TID (3 times/day) or QID (4 times/day), with a maximum of 3 g/day. Adults: 300 to 600 mg PO TID to QID, with a maximum of 3 g/day.

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

Consult a doctor, as Penicillin V is not typically recommended for infants under 1 month 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 maximum daily dose?

The maximum daily dose is 3 g (3000 mg) per day for both pediatric (≥1 month) and adult patients.