Pharmaceutical Calculations

Scenario: A nurse prepared a 5% stock solution for a newborn but realized that a 1% solution was needed. How much of the 5% solution should the nurse mix with a diluent to make 50 mL of a 1% solution?

• 5 mL

• 10 mL

• 15 mL

• 20 mL

Scenario: A doctor needs to calculate the Body Surface Area (BSA) of a 160 cm tall patient weighing 60 kg to personalize their chemotherapy dose. What is the patient's BSA?

• 1.4 m²

• 1.5 m²

• 1.6 m²

• 1.7 m²

Scenario: A pharmacist notices that a compounded ointment is supposed to weigh 100 mg, but the measured amount is only 95 mg. What is the percentage error in this measurement?

• 3%

• 4%

• 5%

• 6%

Scenario: A critically ill patient in the ICU requires a 500 mL IV with a drop factor of 15 gtt/mL to be administered over 4 hours. The nurse calculates the drip rate. What is the correct drip rate in gtt/min?

• 25.0 gtt/min

• 31.25 gtt/min

• 33.33 gtt/min

• 40.0 gtt/min

Scenario: A technician needs to prepare a 250 mL solution of 5% glucose for a patient. How many grams of glucose should be added to reach the correct concentration?

• 10 g

• 12.5 g

• 15 g

• 20 g

Scenario: A pharmacist is preparing a pediatric dose of a medication based on Clark's Rule, which uses the child's weight in pounds. If the adult dose is 200 mg and the child weighs 50 lbs, what is the correct pediatric dose?

• 50 mg

• 66.67 mg

• 75 mg

• 80 mg

Scenario: A pharmacist calculates the chemotherapy dose for a patient with a BSA of 1.6 m². The prescribed dose is 50 mg/m². What is the total chemotherapy dose needed?

• 60 mg

• 70 mg

• 80 mg

• 90 mg

Scenario: An elderly patient is prescribed 0.5 g of a medication, but the prescription needs to be converted to mg. What is the equivalent dosage in mg?

• 50 mg

• 500 mg

• 1000 mg

• 1500 mg

Scenario: A pediatric patient weighing 25 kg has been prescribed acetaminophen at a dose of 10 mg/kg to manage pain. What is the total dose the child should receive?

• 200 mg

• 250 mg

• 300 mg

• 350 mg

Scenario: In the emergency department, a nurse needs to administer 250 mL of IV solution over 3 hours to a dehydrated patient. What should be the infusion rate in mL/hr?

• 50 mL/hr

• 60 mL/hr

• 75 mL/hr

• 83.3 mL/hr