Drug and Dosage Calculations Practice III
Completion
Complete each statement.
1. Directions: For the following scenario, identify which of the "six rights" of medication
administration has been violated.
A nurse charts medications that she administered at 10 AM on October 1st for 10 AM on October
2nd: _______________.
2. Directions: Complete the following sentence with the correct word or number.
Administration of medications within 30 minutes of the scheduled time is referred to as the
_____________ .
3. Directions: Use the label to identify the information requested. If more than one answer is
necessary, separate your answers with commas.
.
a. Trade name: _______________
b. Generic name: _______________
c. Dosage strength: _______________
d. Form: _______________
e. Total amount in container: _______________
4. Directions: Use the label to identify the information requested. If more than one answer is
necessary, separate your answers with commas.
a. Trade name: _______________
b. Generic name: _______________
c. Dosage strength: _______________
d. According to the label, who should not use this medication? _______________
5. Directions: Use the label to identify the information requested. If more than one answer is
necessary, separate your answers with commas.
a. Trade name: _______________
b. Generic name: _______________
c. Dosage strength: _______________
d. Form: _______________
e. Total volume: _______________
6. Directions: Use the label to identify the information requested. If more than one answer is
necessary, separate your answers with commas.
a. Trade name: _______________
b. Generic name: _______________
c. Dosage strength: _______________
d. Form: _______________
e. Directions for use: _______________
7. Directions: Use the label to identify the information requested. If more than one answer is
necessary, separate your answers with commas.
Trade name: ___________________
a. Generic name: __________________
b. Form: _______________________
c. Dosage strength: ______________
d. Total amount in container: _______________
8. Directions: Use the label to identify the information requested. If more than one answer is
necessary, separate your answers with commas.
a.
b.
c.
d.
Generic name: ____________________
Dosage strength: ____________________
Total volume: ______________________
Directions for use: __________________
9. Directions: Complete with the correct word(s) or number.
The solid form of medication that contains granules that delays the release of the medication is
referred to as a _______________.
10. Directions: Calculate the following dosage. Use labels where provided. Round oral liquids to the
nearest tenth as indicated.
Order: Evista 60 mg p.o. daily
Available:
Dosage: _____
11. Directions: Calculate the following dosage. Use labels where provided. Round oral liquids to the
nearest tenth as indicated.
Order: Biaxin 175 mg p.o. q12h
Available:
Dosage: _____
12. Directions: Calculate the following dosage. Use labels where provided. Round oral liquids to the
nearest tenth as indicated.
Order: Depakene 0.5 g p.o. daily for 1 week, then 1 g p.o. daily beginning the second week
Available:
a. How many milligrams will the client receive per dosage for 1 week? _____ mg
b. How many milliliters will you administer per dosage for 1 week? _____ mL
c. How many milligrams will the client receive per dosage the second week? _____ mg per dosage
d. How many milliliters will you administer per dosage the second week? _____ mL
13. Directions: Calculate the following dosage. Use labels where provided. Round oral liquids to the
nearest tenth as indicated.
Order: Carvedilol (Coreg) 6.25 mg p.o. b.i.d.
Available:
a. How many tablets should the client receive per dosage? _____ tab(s)
b. How many milligrams will the client receive per day? _____ mg
14. Directions: Calculate the following dosage. Use labels where provided. Round oral liquids to the
nearest tenth as indicated.
Order: Clozaril 50 mg p.o. daily
Available:
Dosage: _____
15. Directions: Refer to the diagram of the syringes provided to answer the following questions.
The nurse needs to administer 31 units of Humulin Regular U-100. Indicate the correct syringe the
nurse should choose to accurately withdraw the dosage. Shade in the dosage on the syringe.
a.
b.
16. Directions: Calculate the dosages, use labels where provided, and shade in the dosages on the
syringe where provided. Round answers to the nearest tenth unless otherwise indicated.
Order: Terbutaline 300 mcg subcut stat
Available:
a. How many milliliters will you administer? _____ mL
b. Shade in the dosage on the syringe.
17. Directions: Calculate the dosages, use labels where provided, and shade in the dosages on the
syringe where provided. Round answers to the nearest tenth unless otherwise indicated.
Order: Fosphenytoin 280 mg IV daily
Available:
a. How many milliliters will you administer? _____ mL
b. Shade in the dosage on the syringe.
18. Directions: Calculate the dosages, use labels where provided, and shade in the dosages on the
syringe where provided. Round answers to the nearest tenth unless otherwise indicated.
Order: Ranitidine 35 mg IV q6h
Available:
a. How many milliliters will you add to the IV? _____ mL
b. Shade the dosage in on the syringe
19. Directions: Calculate the dosages, use labels where provided, and shade in the dosages on the
syringe where provided. Round answers to the nearest tenth unless otherwise indicated.
Order: Furosemide 15 mg IM every day
Available:
How many milliliters will you administer? _____ mL
20. Directions: Calculate the dosages, use labels where provided, and shade in the dosages on the
syringe where provided. Round answers to the nearest tenth unless otherwise indicated.
Order: Vancomycin 0.6 g IV q12h
Available:
After reconstitution: 50 mg per mL
How many milliliters will you administer? _____ mL
21. Directions: Prepare the following strength solutions. Describe your calculations.
1/4 strength Ensure 8 oz p.o. q4h for 24 hours
22. Directions: Prepare the following strength solutions. Describe your calculations.
Order: Amoxicillin 175 mg p.o. q8h
Available:
a. Form: _______________
b. Route of administration: _______________
c. Type of diluent and amount to use: _______________
d. Directions for mixing: _______________
e. Dosage strength of reconstituted solution: _____
f. Time good for after reconstitution: _____
g. How many milliliters will you administer? __________
23. Directions: Prepare the following strength solutions. Describe your calculations.
Prepare irrigant 250 mL 1/2 strength solution: ______________________________
24. Directions: Indicate how you would prepare each of the following using full-strength hydrogen
peroxide (solute) and normal saline (solvent).
300 mL of 3/4 strength for skeletal pin care
25. Directions: Indicate how you would prepare each of the following using full-strength hydrogen
peroxide (solute) and normal saline (solvent).
8 oz of 1/2 strength for wound care.
26. Directions: Indicate how you would prepare each of the following using full-strength hydrogen
peroxide (solute) and normal saline (solvent).
0.24 L of 1/3 strength for wound care
27. Directions: Fill in the correct number or word(s).
Order: Lantus U-100 insulin 68 units subcut daily at 8:00 AM
Available:
What will you administer using this syringe? ________
Shade in the appropriate dosage on the syringe.
28. Directions: Identify the letter of the label corresponding to the IV fluid abbreviation.
D
NS with 20 mEq KCL
29. Directions: Interpret the following IV orders.
1,000 mL (1 L) of L/R q8h
30. Directions: Determine the infusion time for the following IV. State time in both traditional and
military time. Round minutes to the nearest whole number of minutes.
1,000 mL D5W infusing at 90 mL/hr
a. Determine the infusion time: _____
b. The IV was started at 2:00 AM. When will the infusion be complete? _____
31. Directions: Determine the infusion time for the following IV. State time in both traditional and
military time. Round minutes to the nearest whole number of minutes.
750 mL lactated Ringer solution at 80 mL/hr
a. Determine the infusion time: _____
b. The IV was started at 7:00 AM. When will the infusion be complete? _____
32. Directions: Determine the infusion time for the following IV. State time in both traditional and
military time. Round minutes to the nearest whole number of minutes.
Total parenteral nutrition (TPN) solution of 1,000 mL at 30 mL/hr
Determine the infusion time: _____
33. Directions: Determine the infusion time for the following IV. State time in both traditional and
military time. Round minutes to the nearest whole number of minutes.
D5 1/3 NS 1,000 mL at 45 mL/hr
Determine the infusion time: _____
34. Directions: Determine the following in drops per minute using the drop factor provided.
3,000 mL D5W at 125 mL/hr
a. 10 gtt/mL _____
b. 15 gtt/mL _____
c. 20 gtt/mL _____
d. 60 gtt/mL _____
35. Directions: Recalculate the IV flow rate. Determine the percentage of change and state the course of
action. Assume that hospital policy permits recalculation of rates when rates are off schedule and
clients are stable.
100 units of regular Humulin insulin in 250 mL 0.9% NS were to infuse at 4 mL/hr. How many units
per hour will be delivered? _____
36. Directions: Recalculate the IV flow rate. Determine the percentage of change and state the course of
action. Assume that hospital policy permits recalculation of rates when rates are off schedule and
clients are stable.
10% calcium chloride (10 mL) over 5 minutes IV push
How many milliliters will be injected per minute? _____ mL
37. Directions: Calculate the following hourly dosage of heparin (units/hr).
Order: Infuse heparin at 800 units/hr IV from a solution containing 40,000 units in 1,000 mL D5W.
How many milliliters will infuse per hour? _____ mL
38. Directions: Calculate the following hourly dosage of heparin (units/hr).
If a U for units was misread as a zero by the nurse for a heparin dose, the consequences to the client
receiving the heparin could be ____________________________.
39. Directions: Calculate the following hourly dosage of heparin (units/hr).
A client weighs 70 kg. Heparin infusion: Heparin 25,000 units in 1,000 mL 0.9 % sodium chloride.
Order: Bolus with heparin sodium at 90 units/kg, then initiate drip at 20 units/kg/hr.
a. Calculate the heparin bolus dosage: _____
b. Calculate the infusion rate for the IV dosage: _____
c. Determine the rate in mL/hr at which to set the infusion device: _____
40.
Directions: Use the following weight-based heparin protocol for the following problems.
1. Bolus heparin at 80 units/kg
2. Begin intravenous infusion of heparin at 18 units/kg/hr using 25,000 units of heparin in 250
mL of 0.45% NaCl for 100 units per mL
3. Adjust intravenous heparin daily on the basis of APTT results.
 APTT less than 35 sec. Rebolus with 80 units/kg and increase rate
by 4 units/kg/hr
 APTT 35-45 sec. Rebolus with 40 units/kg and increase rate by
2 units/kg/hr
 APTT 46-70 sec. No change
 APTT 71-90 sec. Decrease rate by 2 units/kg/hr
 APTT greater than 90 sec. Stop heparin infusion for 1 hour and decrease rate by 3
units/kg/hr
A client weighs 81 kg. Determine the bolus dose of heparin, the initial infusion rate, and then adjust
the hourly infusion rate up or down on the basis of the APTT results. APTT is reported as 43. The IV
pump is calibrated in tenths of a milliliter.
41. Directions: Calculate the dosages as indicated.
A client is receiving procainamide 1 g in 500 mL D5W at 120 mL/hr.
a. mg/hr: _____
b. mg/min: _____
42. Directions: Calculate the dosages as indicated.
Esmolol is ordered for a client. The solution available is 2.5 g in 250 mL D5W. The order is to
infuse 32 mL/hr.
a. mg/hr: _____
b. mg/min: _____
43. Directions: Calculate the dosages as indicated.
Dopamine 4 mcg/kg/min is ordered for a client who weighs 165 lb. The solution available is 400 mg
of Dopamine in 250 mL D5W. To infuse by infusion pump that delivers in tenths of a milliliter.
a. mg/min: ____
b. mg/hr: _____
c. mL/hr: ____
44. Directions: Calculate the dosages as indicated.
Nitroglycerine has been ordered to titrate at 10 mcg/min to 30 mcg/min, and the rate should be
increased by 5 mcg/min every 3-5 minutes for chest pain. The solution contains 50 mg nitroglycerin
in 250 mL D5W. Develop a titration table in 5 mcg increments. The pump delivers in tenths of a
milliliter.
45. Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
Erythromycin ethylsuccinate 62.5 mg p.o. q6h is ordered for an infant weighing 10 lb 4 oz. The
recommended safe dosage is 30 to 50 mg/kg/24 hr divided q6h.
a. What is the infant's weight in kilograms? _____
b. What is the safe 24-hour dosage range for this infant? _____
c. What is the divided dosage range? _____
d. Is the dosage ordered safe? (Prove mathematically.) _______________ Explain your action:
______________________________
46. Directions: Round dosage and weight to the nearest tenth as indicated. Use labels where provided.
Phenobarbital 45 mg p.o. b.i.d. is ordered for a child with seizures weighing 35 lb. The
recommended dosage is 6 to 8 mg/kg/24 hr, given every day or b.i.d.
a. What is the child's weight in kilograms? _____
b. What is the safe 24-hour dosage range for this child? _____
c. Is the dosage ordered safe? (Prove mathematically.) _______________ Explain your action:
______________________________
47. Directions: Using the West nomogram, determine the body surface area (BSA) for a child with the
height and weight given.
22 inches and 10 lb: _____ m2
48. Directions: Using the West nomogram, determine the body surface area (BSA) for a child with the
height and weight given.
170 cm and 50 kg: _____ m2
49. Directions: Use the appropriate formula to determine BSA. Express answer to the nearest
hundredth.
An adolescent who measures 157.5 cm and weighs 59.1 kg: _____ m2
50. Directions: Using the West nomogram or formula when indicated, calculate the following dosages.
Express answer to the nearest tenth.
The recommended dosage of Zovirax for a child who is immunosuppressed and has a varicellazoster infection is 500 mg/m2. The child weighs 26.5 lb and is 58 inches tall.
a. What is the child's BSA? _____
b. What is the recommended dosage? ____