Calculating and Evaluating Ibuprofen Dosage for a Pediatric Patient

QUESTION

a pediatric patient weighs 9.32 kg and is 28 in. in height. the manufacturer of ibuprofen has a recomended dose of 5 to 10 mg/kg every 6 to 8 hours. the physician has ordered 125 mg q8 h. a)calculate the minimun daily dose for this pediatric patient. b) calculate the maximum daily dose for this pediatric patient. c) is the physician´s dose wlthin the recommended safe range? d) how many milliliters will be prepared for one prescribed dose if the product is available as a 100 mg/5 mL suspencion?

ANSWER

Calculating and Evaluating Ibuprofen Dosage for a Pediatric Patient

Introduction

Prescribing medications for pediatric patients requires careful consideration of factors such as weight, height, and recommended dosing guidelines. In this scenario, we will calculate the minimum and maximum daily doses of ibuprofen for a pediatric patient, assess whether the physician’s prescribed dose falls within the recommended safe range, and determine the quantity of medication to be prepared for one prescribed dose.

Calculations and Evaluation

a) Minimum Daily Dose: To calculate the minimum daily dose, we will use the lower end of the recommended dosage range (5 mg/kg) for the patient’s weight:

Patient’s weight: 9.32 kg
Minimum dosage (5 mg/kg): 5 mg/kg x 9.32 kg = 46.6 mg

Therefore, the minimum daily dose is 46.6 mg.

b) Maximum Daily Dose: To calculate the maximum daily dose, we will use the upper end of the recommended dosage range (10 mg/kg) for the patient’s weight:

Patient’s weight: 9.32 kg
Maximum dosage (10 mg/kg): 10 mg/kg x 9.32 kg = 93.2 mg

Therefore, the maximum daily dose is 93.2 mg.

c) Physician’s Prescribed Dose: The physician has ordered 125 mg every 8 hours (q8 h). To assess whether this dose falls within the recommended safe range, we need to consider the patient’s weight and the interval between doses:

Patient’s weight: 9.32 kg
Prescribed dose: 125 mg q8 h

The total daily dose prescribed is 125 mg x 3 (three doses in 24 hours) = 375 mg per day.

Since the prescribed dose of 375 mg per day is within the range of 46.6 mg (minimum) to 93.2 mg (maximum), it falls within the recommended safe range.

d) Quantity to Prepare for One Dose: To determine how many milliliters will be prepared for one prescribed dose, we need to know the concentration of the ibuprofen suspension, which is 100 mg/5 mL:

Prescribed dose: 125 mg
Concentration of the suspension: 100 mg/5 mL

We can set up a proportion to calculate the volume (in mL) to prepare for one dose:

(125 mg / X mL) = (100 mg / 5 mL)

Solving for X:

X = (125 mg * 5 mL) / 100 mg
X = 6.25 mL

Therefore, 6.25 mL of the suspension should be prepared for one prescribed dose of 125 mg.

Conclusion

In this scenario, we calculated the minimum and maximum daily doses of ibuprofen for a pediatric patient based on the recommended dosage range of 5 to 10 mg/kg. We determined that the physician’s prescribed dose of 125 mg q8 h falls within the safe range. Additionally, we calculated that 6.25 mL of the 100 mg/5 mL suspension should be prepared for one prescribed dose of 125 mg, ensuring accurate and safe administration of the medication to the pediatric patient.