ExCPT Test ExCPT Pharmacy Calculations

Question 1

A prescription calls for 250 mg of amoxicillin. The available suspension is 125 mg/5 mL. How many mL should be dispensed per dose?

Accepted Answer

10 mL

Answer

250 mg ÷ 125 mg/5 mL = 10 mL per dose.

Question 2

A patient needs 1.5 g of a medication. The tablets available are 500 mg each. How many tablets are needed?

Accepted Answer

3 tablets

Answer

1.5 g = 1500 mg; 1500 mg ÷ 500 mg/tablet = 3 tablets.

Question 3

A pharmacy technician needs to prepare 200 mL of a 2% solution. How many grams of solute are required?

Accepted Answer

4 g

Answer

2% means 2 g per 100 mL, so 200 mL requires 4 g.

Question 4

If a drug costs $0.85 per tablet and the patient needs a 30-day supply of 2 tablets per day, what is the total drug cost?

Accepted Answer

$51.00

Answer

2 tablets/day × 30 days = 60 tablets; 60 × $0.85 = $51.00.

Question 5

A physician orders heparin 1,000 units/hr via IV infusion. The available bag contains 25,000 units in 250 mL. What is the infusion rate in mL/hr?

Accepted Answer

10 mL/hr

Answer

Concentration = 25,000 units ÷ 250 mL = 100 units/mL; 1,000 units ÷ 100 units/mL = 10 mL/hr.

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