FREE ExCPT Questions and Answers

Question 1

You get a prescription for 250 mg of amoxicillin for a 12-year-old child who weighs 88 pounds. Adults should take 500 mg daily. You draw the pharmacist's attention to the prescription because:

Accepted Answer

It is not necessary to alert the pharmacist, the prescription is fine

Answer

The prescribed dosage of 250 mg of amoxicillin for a 12-year-old weighing 88 pounds is generally considered safe and appropriate. Pediatric dosages for amoxicillin typically range from 20-50 mg/kg/day, and for an 88-pound child (approx. 40 kg), this would be 800-2000 mg/day. A 250 mg dose falls well within this therapeutic range, especially if administered multiple times a day, and is lower than the typical adult dose of 500 mg.

Question 2

Keflin dosage for adults is 1 g. What dosage would be appropriate for a 50-pound child?

Accepted Answer

333 mg

Answer

To determine an appropriate pediatric dosage based on an adult dose, Clark's Rule is often used. This rule calculates the child's dose by dividing the child's weight in pounds by 150 pounds (average adult weight) and multiplying by the adult dose. For a 50-pound child and a 1000 mg (1 g) adult dose, the calculation is (50 lbs / 150 lbs) * 1000 mg, which equals approximately 333 mg.

Question 3

Ethambutol 10 mg/kg is the dosage you requested for a toddler who weighs 88 lb. 1 dosage =

Accepted Answer

400 mg

Answer

To calculate the correct dosage, first convert the child's weight from pounds to kilograms. Since 1 kilogram is approximately 2.2 pounds, an 88-pound toddler weighs 40 kg (88 lb / 2.2 lb/kg). Then, multiply the dosage per kilogram by the child's weight in kilograms: 10 mg/kg * 40 kg equals a 400 mg dosage.

Question 4

You have requested 150 mg of cyclosporine by po. You currently have a stock of a 100 mg/mL solution. Amount disbursed =

Accepted Answer

1.5 mL

Answer

To determine the amount to dispense, use the formula: (Desired Dose / Concentration of Stock Solution). You need 150 mg of cyclosporine, and your stock solution has a concentration of 100 mg per 1 mL. Therefore, dividing 150 mg by 100 mg/mL yields 1.5 mL.

Question 5

Sulfisoxazole susp. 300 mg po is what you've ordered. You currently store a 250 mg/5 mL solution. Amount disbursed =

Accepted Answer

6 mL

Answer

To calculate the volume of suspension needed, divide the desired dose by the concentration of the stock solution and then multiply by the volume associated with that concentration. You need 300 mg, and the stock is 250 mg in 5 mL. So, (300 mg / 250 mg) * 5 mL equals 1.2 * 5 mL, resulting in 6 mL to be dispensed.

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FREE ExCPT Questions and Answers