Dosage Calculation Proctored Exam
Calculation
The order reads "amoxicillin 20mg/kg/dose PO every 8 hours." The child weighs 33 pounds. Using the label below, how many mL will you administer per dose? (Enter a number only, answer to the nearest tenths place)
mL per dose
Explanation & Rationale
1. Convert the child's weight from pounds to kilograms: There are approximately 2.2 pounds in 1 kilogram. 33 pounds / 2.2 pounds/kg = 15 kg (approximately) 2. Calculate the total milligrams of amoxicillin needed per dose: The order is for 20 mg/kg/dose. The child weighs 15 kg. 20 mg/kg * 15 kg = 300 mg 3. Determine the concentration of the amoxicillin suspension: The label shows the concentration is 125 mg/5 mL. 4. Set up a proportion to find the volume (in mL) needed: 125 mg / 5 mL = 300 mg / x mL 5. Solve for x: Cross-multiply: 125x = 300 * 5 125x = 1500 x = 1500 / 125 x = 12 mL Answer: You will administer 12 mL per dose.
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