Let’s kick it up a notch! Here’s another set of questions about drug and IV infusion rate calculations to prepare you for the NCLEX.

Right Dose.

Check the medication sheet and the doctor’s order before medicating. Be aware of the difference of an adult and a pediatric dose.

—10 Rights of Drug Administration

### Topics

Included topics in this exam are as follows:

- Dosage Calculation
- Metric Conversions
- IV Infusion Rate Calculations

### Guidelines

Follow the guidelines below to make the most out of this exam:

- Read each question carefully and choose the best answer.
- You are given one minute per question. Spend your time wisely!
- Answers and rationales are given below. Be sure to read them.
- If you need more clarifications, please direct them to the comments section.

** NOTE: In this quiz, the rationales and computation of the solutions are available in the Text Mode.**

### Questions

## Exam Mode

In **Exam Mode: **All questions are shown but the results, answers, and rationales (if any) will only be given after you’ve finished the quiz. You are given 1 minute per question.

**For the rationales and solutions of this quiz, please see the Text Mode tab. **

## Drug Dosage Calculation NCLEX Exam 3 (23 Items)

*Drug Dosage Calculation NCLEX Exam 3 (23 Items)*.You scored %%SCORE%% out of %%TOTAL%%.Your performance has been rated as %%RATING%%

## Practice Mode

* Practice Mode: *This is an interactive version of the

*Text Mode.*All questions are given in a single page and correct answers, rationales or explanations (if any) are immediately shown after you have selected an answer. No time limit for this exam.

**For the rationales and solutions of this quiz, please see the Text Mode tab. **

## Drug Dosage Calculation NCLEX Exam 3 (23 Items)

*Drug Dosage Calculation NCLEX Exam 3 (23 Items)*.You scored %%SCORE%% out of %%TOTAL%%.Your performance has been rated as %%RATING%%

## Text Mode

In** *** Text Mode: *All questions and answers are given for reading and answering at your own pace. You can also copy this exam and make a print out.

**1. Doctor’s order: Amoxicillin 0.25 g p.o. every 8 hours; Available: Amoxicillin 125 mg tablets. How many tablets will the nurse give per dose?**

A. 0.5 tab

B. 1 tab

C. 1.5 tabs

D. 2 tabs

**2. Doctor’s order: Zofran 8 mg p.o. t.i.d.; Available: Zofran in a 100 ml bottle labeled 4 mg/tsp.; How many ml will the nurse administer for each dose?**

A. 1.25 ml

B. 6.25 ml

C. 8 ml

D. 10 ml

**3. Doctor’s order: Morphine gr 1/10; Available: Morphine 10 mg/ml. How many ml will the nurse give?**

A. 0.6 ml

B. 1 ml

C. 6 ml

D. 10 ml

**4. Give Fortaz mg/kg/day p.o. 50 mg/kg p.o. t.i.d. to a child who weighs 25.5 kg. Fortaz is available in an oral suspension labeled 100 mg/ml. How many ml would the nurse administer per dose?**

A. 0.5 ml

B. 0. 8 ml

C. 10.8 ml

D. 12.8 ml

**5. Give Ceclor 45 mg/kg/day p.o. in 3 divided doses for a patient who weighs 66 pounds. A 75 ml stock medication is labeled Ceclor 125 mg/ml. How many ml would the nurse administer per dose?**

A. 0.5 ml

B. 0.8 ml

C. 3.6 ml

D. 9 ml

**6. Give Biaxin for a child whose BSA is 0.55 m ^{2}. The usual adult dose is 500 mg. Biaxin is available in an oral suspension. The 100ml bottle is labeled 50 mg/ml. How many ml would the nurse give per dose?**

A. 3.2 ml

B. 1.6 ml

C. 1.2 ml

D. 5 ml

**7. Give Phenergan for a child whose BSA is 1.2 m ^{2}. The usual adult dose is 25 mg. How many milligrams would the nurse administer for the dose?**

A. 12 mg

B. 17.6 mg

C. 20.8 mg

D. 25 mg

**8. LR 125 ml/hr via gravity flow using tubing calibrated at 15 gtt/ml. Calculate the flow rate.**

A. 8 gtt/min

B. 15 gtt/min

C. 25 gtt/min

D. 31 gtt/min

**9. One liter NS to infuse over 24 hours using a micro drip (gravity flow). Calculate the flow rate.**

A. 42 gtt/min

B. 28 gtt/min

C. 12 gtt/min

D. 10 gtt/min

**10. At the change of shift you notice 200 ml left to count in the I.V. bag. The I.V. is infusing at 80 ml/hr. How much longer will the I.V. run?**

A. 1 hr

B. 1 hr and 30 mins

C. 2 hrs

D. 2 hrs and 30 mins

**11. Keflin 2 g in 100 ml D5W IVPB over 20 minutes. The I.V. tubing is 15 gtt/ml. Calculate the flow rate.**

A. 150 gtt/min

B. 100 gtt/min

C. 75 gtt/min

D. 76 gtt/min

**12. The physician writes an order for Heparin 900 units/hour. The label on the I.V. bag reads: Heparin 10,000 units in 500 ml D5W. How many ml/hr will deliver the correct dose?**

A. 11 ml/hr

B. 45 ml/hr

C. 50 ml/hr

D. 55 ml/hr

**13. Administer Heparin 1,000 units/hr from an I.V. bag mixed 40,000 units in 1 L D5W. How many ml/hr will deliver the correct amount of Heparin?**

A. 40 ml/hr

B. 30 ml/hr

C. 25 ml/hr

D. 15 ml/hr

**14. The patient’s Heparin is infusing at 28 ml/hr on an infusion pump. The bag of fluid is mixed 20,000 units of Heparin in 500 ml D5W. What hourly dose of heparin is the patient receiving?**

A. 1,120 units/hr

B. 1,210 units/hr

C. 2,120 units/hr

D. 2,210 units/hr

**15. The patient’s heparin drip is infusing at 11 ml/hr on an infusion pump. The bag of fluid is mixed 25,000 units of Heparin in 250 ml D5W. What hourly dose of Heparin is the patient receiving?**

A. 2,500 units/hr

B. 2,000 units/hr

C. 1,000 units/hr

D. 1,100 units/hr

**16. Give Regular insulin by continuous I.V. infusion at 20 units/hr. The solution is 250 ml NS with 100 units of Regular insulin. What rate on the infusion pump will deliver the correct dose?**

A. 5 ml/hr

B. 8 ml/hr

C. 50 ml/hr

D. 100 ml/hr

**17. Administer a Theophylline drip at 40 mg/hr The solution is 250 ml D5W + Theophylline 500 mg. What rate on the infusion pump will deliver the correct dose?**

A. 20 ml/hr

B. 40 ml/hr

C. 80 ml/hr

D. 100 ml/hr

**18. Give Tridil 15 mcg/min. Tridil is mixed 50 mg in 500 ml D5W. What rate on the infusion pump will deliver the correct dose?**

A. 150 ml/hr

B. 15 ml/hr

C. 90 ml/hr

D. 9 ml/hr

**19. Give propofol 10 mcg/kg/minute. The infusion is mixed propofol 250 mg in 250 ml D5W. The patient weighs 168 pounds. What rate on the infusion pump will deliver the correct dose?**

A. 10 ml/hr

B. 26 ml/hr

C. 46 ml/hr

D. 50 ml/hr

**20. Give Nitroprusside 5 mcg/kg/minute via continuous infusion for a patient weighing 205 lbs. Nitroprusside is available in a solution of 200 mg in 250 ml D5W. What rate on the infusion pump will deliver the correct dose?**

A. 25 ml/hr

B. 35 ml/hr

C. 45 ml/hr

D. 50 ml/hr

**21. Tridil is infusing at 15 ml/hr on an infusion pump. The drug is mixed 50 mg in 500 ml D5W. How many mcg/minute is the patient receiving?**

A. 25 mcg/min

B. 35 mcg/min

C. 45 mcg/min

D. 50 mcg/min

**22. A lidocaine drip is infusing at 30 ml/hr on an infusion device. The drug is mixed 2 g in 500 ml D5W. How many mg/minute is the patient receiving?**

A. 5 mg/min

B. 4 mg/min

C. 3 mg/min

D. 2 mg/min

**23. Aminophylline is infusing at 30 ml/hr. The drug is mixed 250 mg in 500 ml D5W. How many mg/hr is the patient receiving?**

A. 30 mg/hr

B. 25 mg/hr

C. 20 mg/hr

D. 15 mg/hr

### Answer and Rationale

**1. Answer: D. 2 tabs**

Formula:

Solution:

**2. Answer: D. 10 ml**

Formula:

Solution:

**3. Answer: A. 0.6 ml**

Formula:

Solution:

**4. Answer: D. 12.8 ml**

Formula:

Solution:

**5. Answer: C. 3.6 ml**

Formula:

Solution: 45 mg/kg/day x 30 kg = 1.350 mg/day ÷ 3 doses = 450 mg per dose

**6. Answer: A. 3.2 ml**

Formula:

BSA Formula:

Solution:

**7. Answer: B. 17.6 mg**

BSA Formula:

Solution:

**8. Answer: D. 31 gtt/min**

IV Flow Formula:

Solution:

**9. Answer: A. 42 gtt/min**

IV Flow Formula:

Solution:

**10. Answer: D. 2 hrs and 30 mins**

Solution: 200 ÷ 80 = 2.5 = 2 hrs and 30 mins

**11. Answer: C. 75 gtt/min**

IV Flow Formula:

Solution:

**12. Answer: B. 45 ml/hr**

Formula:

Solution:

**13. Answer: C. 25 ml/hr**

Formula:

Solution:

**14. Answer: A. 1,120 units/hr**

Solution:

**15. Answer: D. 1,100 units/hr**

Solution:

**16. Answer: C. 50 ml/hr**

Formula:

Solution:

**17. Answer: A. 20 ml/hr**

Formula:

Solution:

**18. Answer: D. 9 ml/hr**

1. Infusion device is set at hourly rate, so convert mcg/min to mcg/hr

15 mcg/min = 900 mcg/hr (15 x 60)

2. Drug is expressed in mg, so covert mcg to mg

900 mcg/hr = 0.9 mg/hr

3. Formula:

Solution:

**19. Answer: C. 46 ml/hr**

1. Convert lbs to kg

168 ÷ 2.2 = 76.36 = 76.4 kg

2. Calculate the minute rate

76.4 kg x 10 mcg/kg/min = 764 mcg/min

3. Calculate hourly rate

764 mcg/min x 60 mins/hr = 45,840 mcg/hr

4. Drug is expressed in mg, so convert mcg to mg

45,840 mcg = 45.84 mg

5. Formula:

Solution:

**20. Answer: B. 35 ml/hr**

1. Convert lbs to kg

205 ÷ 2.2 = 93.18 = 93.2 kg

2. Calculate the minute rate

93.2 kg x 5 mcg/kg/min = 466 mcg/min

3. Calculate hourly rate

466 mcg/min x 60 mins/hr = 27,960 mcg/hr

4. Drug is expressed in mg, so convert mcg to mg

27,960 mcg = 27.96 mg

5. Formula:

Solution:

**21. Answer: A. 25 mcg/min**

1. Convert 50 mg to mcg = 50,000 mcg

2. Use ratio/proportion to solve

x = 1,500 mcg/hr

3. Calculate the minute rate

1,500 mcg/hr ÷ 60 mins/hr = 25 mcg/min

**22. Answer: D. 2 mg/min**

1. Convert 2 g to mg = 2,000 mg

2. Use ratio/proportion to solve

x = 120 mg/hr

3. Calculate the minute rate

120 mg/hr ÷ 60 mins/hr = 2 mg/min

**23. Answer: D. 15 mg/hr**

x = 15 mg/hr

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