PEBC Pharmaceutical Calculations

Question 1

A physician orders amoxicillin 40 mg/kg/day divided every 8 hours for a child weighing 22 kg. How many mg should be given per dose?

Accepted Answer

293 mg

Answer

147 mg

Answer

440 mg

Answer

880 mg

Question 2

A pharmacist needs to prepare 250 mL of a 0.9% NaCl solution. How many grams of NaCl are required?

Accepted Answer

2.25 g

Answer

0.9 g

Answer

9 g

Answer

22.5 g

Question 3

An IV infusion of 1000 mL is to be administered over 8 hours using a drip set delivering 20 drops/mL. What is the drip rate in drops per minute?

Accepted Answer

42 drops/min

Answer

20 drops/min

Answer

36 drops/min

Answer

28 drops/min

Question 4

A medication is available as 250 mg/5 mL. A patient needs a 375 mg dose. How many mL should be dispensed?

Accepted Answer

7.5 mL

Answer

5 mL

Answer

10 mL

Answer

12.5 mL

Question 5

How many milligrams of drug are contained in 2 L of a 1:5000 solution?

Accepted Answer

400 mg

Answer

200 mg

Answer

100 mg

Answer

250 mg

Question 6

A patient is to receive heparin 25,000 units in 250 mL NS at 1,200 units/hour. What is the correct infusion rate in mL/hour?

Accepted Answer

12 mL/hr

Answer

8 mL/hr

Answer

10 mL/hr

Answer

15 mL/hr

Question 7

What is the percentage strength (w/v) of a solution made by dissolving 5 g of drug in enough water to make 200 mL?

Accepted Answer

2.5%

Answer

1%

Answer

4%

Answer

5%