Medications Math Exam Review

1. A nurse is preparing to administer codeine 20 mg PO every 6 hr PRN pain. Available is codeine oral solution 10 mg/5 mL. How many mL should the nurse administer per dose? (Round to nearest whole number.)

10 mL

23. A nurse is preparing to administer cefaclor 500 mg PO every 12 hours. Available is cefaclor oral suspension 250 mg/5 mL. How many mL should the nurse administer per dose? (Round answer to nearest whole number.)

10 mL

4 oz=___mL (tenth)

118.3

22. A nurse is preparing to administer haloperidol lactate 3 mg IM to a patient. Available is haloperidol injection 5 mg/mL. How many mL should the nurse administer? (Round answer to nearest tenth.)

0.6 mL

12. A nurse is preparing to administer midazolam 0.07 mg/kg IM to a patient who weighs 50 kg. Available is midazolam 5 mg/mL. How many mL should the nurse administer? (Round answer to nearest tenth.)

0.7 mL

9. A nurse is preparing to administer meperidine 75 mg IM stat. Available is meperidine injection 100 mg/mL. How many mL should the nurse administer? (Round answer to nearest hundredth.)

0.75 mL

16. A nurse is preparing to administer eszopiclone 2,000 mcg PO to a patient. How many mg should the nurse administer? (Round answer to nearest whole number.)

2 mg

13. A nurse is preparing to administer famotidine 40 mg PO at bedtime. Available is famotidine 20 mg/tablet. How many tablets should the nurse administer? (Round answer to nearest whole number.)

2 tablets

Doctor's order says: 250 mL of vancomyin to infuse over 45 mins. What is the hourly rate in mL/hr? (nearest whole number)

288 mL/hr

1 tbsp=__ tsp

3

15 mL=__tsp (tenth)

3

17. A nurse is preparing to administer cefazolin 1 g IM. The nurse reconstitutes a 1 g vial of cefazolin with sterile water to yield a final concentration of 330 mg/mL. How many mL should the nurse administer? (Round answer to nearest whole number.)

3 mL

20. A nurse is reviewing new prescriptions for a patient who was just admitted. For which of the following prescriptions should the nurse obtain further clarification from the provider? A. Desvenlafaxine 50 mg PO qd B. Ketorolac nasal spray 1 spray in each nostril every 6 hours PRN moderate pain C. Oxycodone 10 mg PO every 4 hours PRN severe pain D. Regular insulin 35 units subcut 30 min ac

A (qd and qid can be misinterpreted)

2. A nurse is preparing to administer phenytoin 100 mg PO every 8 hours. Available is phenytoin suspension 125 mg/5 mL. How many mL should the nurse administer per dose? (Round to nearest whole number.)

4 mL

Total intake: 75% 8 oz. broth, 25% 16 oz. Pepsi, 90% 9 oz. Ensure, 100% 6 oz. coffee, 6 mL ice chips, 3.5 L fluid bolus. Calculate in mL.

4,323 mL

150 lb=__kg (nearest hundredth)

68.04

Doctor's order says: 0.8 L of normal saline to infuse over 45 mins. What is hourly rate in mL/hr? (nearest whole number)

920 mL/hr

1 tbsp= ___ mL

15

8. A nurse is preparing to administer phenobarbital 6mg/kg/day PO divided in equal doses every 12 hours to a patient who weighs 44 lb. Available is phenobarbital elixir 20 mg/5 mL. The nurse should administer how many mL per dose? (Round to nearest whole number.)

15 mL

85.4 kg=___lb (ones)

188

4 tsp=__mL (tenth)

19.7

18. A nurse is preparing to administer benzathine penicillin G 1,200,000 units IM. Available is benzathine penicillin G injection 600,000 units/mL. How many mL should the nurse administer? (Round answer to nearest whole number.)

2 mL

21. A nurse is preparing to administer furosemide 20 mg IM. Available is furosemide injection 10 mg/mL. How many mL should the nurse administer? (Round answer to nearest whole number.)

2 mL

24. A nurse is preparing to administer tobramycin 4 mg/kg/day IM divided in three equal doses to a patient who weighs 60 kg. Available is tobramycin 40 mg/mL. How many mL should the nurse administer per dose? (Round answer to nearest whole number.)

2 mL

6. A nurse is preparing to administer phenytoin 200 mg PO. Available is phenytoin oral suspension 125 mg/5 mL. How many mL should the nurse administer? (Round to nearest whole number.)

8 mL

2 tsp=__mL (tenth)

9.9

325 mL=__L (tenth)

0.3

1 L= ____ mL

1,000

1 g= ___ mg

1,000

1 kg=__g

1,000

1 mg= _____ mcg

1,000

The provider should include what 4 pieces of information on a prescription order?

1. medication name 2. dosage 3. route 4. frequency

1,200 mg=__g

1.2

10. A nurse is preparing to administer 750,000 units of procaine penicillin G IM. Available is procaine penicillin G injection 600,000 units/mL. How many mL should the nurse administer per dose? (Round answer to nearest tenth.)

1.3

1,400 mL=__L (tenth)

1.4

Total intake: 75% 4 oz. Boost, 50% 8 oz. juice, 350 mL ice chips, 1.4 L fluid bolus, 25% 6 oz. coffee. Calculate in mL.

2,280 mL

2.3 g=___mg

2,300

2.54 L=__mL

2,540

Total intake: 50% 18 oz. Ensure, 100% 20 oz. juice, 500 mL ice chips, 1.5 L bolus, 15% 4 oz. juice. Calculate in mL.

2,638 mL

1 kg=___lb

2.2

2250 g=__mg (nearest tenth)

2.3

14. A nurse is preparing to administer prednisone 50 mg PO to a patient. Available is prednisone 20 mg/tablet. How many tablets should the nurse administer? (Round answer to nearest tenth.)

2.5 tablets

1 oz= ____ mL

30

1 oz=__mL

30

3. A nurse is preparing to administer 2 Tbsp of ibuprofen to a client. How many mL should the nurse administer per dose? (Round to the nearest whole number)

30 mL

11. A nurse is preparing to administer codeine 20 mL oral solution to a patient. How many tsp should the nurse administer? (Round answer to nearest whole number.)

4

Doctor's order says: 2 L of D5W half normal saline to infuse over 48 hrs. What is the hourly rate in mL/hr? (nearest tenth)

41.7 mL/hr

16 oz=__mL (tenth)

473.2

1 tsp = ___ mL

5

5.43 g=__mg

5,430

Doctor's order says: 300 mL of normal saline to infuse over 6 hrs. What is the hourly rate in mL/hr?

50 mL/hr

7. A nurse is caring for a patient who weighs 128 lb. What is the patient's weight in kg? (Round to nearest tenth.)

58.2 kg

0.58 g=__mg

580

30 mL=__tsp (tenth)

6

4. A nurse is preparing to teach a caregiver about phenytoin oral suspension. Which of the following information should the nurse include in the teaching? (Brand Name: Phenytoin; Oral Suspension USP; 100 mg/4 mL; SHAKE WELL BEFORE USING; Store below 30 C (86 F); Protect from light; Delivers 4 mL) A. Keep med in well-lit area B. The total amount in a unit dose container is 100 mL C. Store the med in a cool area D. Roll the unit dose container gently before administering

C

5. A nurse is reviewing a patient's prescriptions. The nurse should contact the provider to clarify which of the following prescriptions? A. Lovastatin 20 mg PO once daily B. Diltiazem 30 mg PO 3 times/daily; hold for apical pulse rate less than 50/min C. Hydrochlorothiazide 50 mg twice daily with meals D. Enoxaparin 30 mg subcutaneous Q12H

C (does not contain route of administration)

What is the rule for ice?

always half the volume

When do you round numbers?

at end of problem

Unless otherwise instructed, tablets have to be rounded to the nearest ___ tablet.

half

Unless otherwise instructed, round a number less than 1 to the nearest ___.

hundredth

Always remember to add __ to your answer.

labels

19. A nurse is preparing to administer morphine 4 mg IM. Available is morphine injection 10 mg/mL. How many mL should the nurse administer per dose? (Round answer to nearest tenth.)

0.4 mL

1.2 L=__mL

1,200

1.75 g=__mg

1,750

15. A nurse is preparing to administer lorazepam 0.05 mg/kg IM 2 hours prior to surgery to a patient who weighs 138 lb. Available is lorazepam injection 2 mg/mL. How many mL should the nurse administer? (Round answer to nearest tenth.)

1.6 mL

70 kg=__lb (ones)

154

Unless otherwise instructed, round a number greater than 1 to the nearest ___.

tenth

mL/hr has to be rounded to the nearest __.

tenth

Capsules have to be rounded to the nearest __ __.

whole number

gtts/min has to be rounded to the nearest __ __.

whole number