FREE NAPLEX QBANK Pharmaceutical Calculations Questions and Answers

Question 1

A physician orders an IV infusion of dopamine at 7 mcg/kg/min for a patient weighing 187 lbs.
The pharmacy provides a dopamine drip of 400 mg in 250 mL of D5W.
At what rate, in mL/hr, should the infusion pump be set?

Accepted Answer

22.6 mL/hr

Answer

15.1 mL/hr

Answer

33.8 mL/hr

Answer

45.2 mL/hr

Question 2

A pharmacist needs to prepare 120 g of a 1.5% hydrocortisone cream. The pharmacy has 2.5% and 0.5% hydrocortisone creams in stock. How many grams of the 2.5% cream are needed?

Accepted Answer

60 g

Answer

30 g

Answer

90 g

Answer

45 g

Question 3

An order is written for 25 mEq of potassium chloride (KCl) to be added to a 1 L bag of 0.9% NaCl. The pharmacy has a stock vial of KCl 2 mEq/mL. How many milliliters of the stock solution must be added to the bag? (MW of K=39, Cl=74.5)

Accepted Answer

12.5 mL

Answer

10 mL

Answer

15 mL

Answer

25 mL

Question 4

A patient is to receive 1 liter of D5W over 10 hours. The IV administration set delivers 15 gtt/mL. What is the flow rate in drops per minute (gtt/min)?

Accepted Answer

25 gtt/min

Answer

21 gtt/min

Answer

17 gtt/min

Answer

30 gtt/min

Question 5

You are asked to compound 240 mL of a 250 mg/5 mL amoxicillin suspension. The pharmacy only has amoxicillin 400 mg/5 mL suspension and a suitable cherry-flavored syrup for dilution. How much of the 400 mg/5 mL suspension is required?

Accepted Answer

150 mL

Answer

180 mL

Answer

120 mL

Answer

200 mL

Question 6

A prescription is written for aminophylline 300 mg tablets, with a direction of 'Take 1 tablet TID for 10 days'. The bioavailability of aminophylline is 80% of theophylline. How many milligrams of theophylline will the patient receive from a single dose?

Accepted Answer

240 mg

Answer

375 mg

Answer

300 mg

Answer

60 mg

A physician orders an IV infusion of dopamine at 7 mcg/kg/min for a patient weighing 187 lbs.The pharmacy provides a dopamine drip of 400 mg in 250 mL of D5W.At what rate, in mL/hr, should the infusion pump be set?

A physician orders an IV infusion of dopamine at 7 mcg/kg/min for a patient weighing 187 lbs.
The pharmacy provides a dopamine drip of 400 mg in 250 mL of D5W.
At what rate, in mL/hr, should the infusion pump be set?