# Self-Assessment On Dosage Calcul

# Self-Assessment On Dosage Calculation Skills

**Instructions:**

The purpose of this self-assessment is to help you to determine areas of
strength and

weakness, so that you may review as needed. Complete the problems to the best of
your

ability. On the last page of the test are the answers. If you miss more than one
problem per

section, you will need to review material related to that section. The
self-assessment includes

practice problems on basic arithmetic skills . Although these are not included as
such on the

challenge exam, they are basic knowledge needed for dosage calculation.

Section I: Addition, Subtraction , Multiplication and Division

Section II: Fractions

Section III: Decimal Points

Section IV: Solving Equations To Determine The Value of X – (Including Ratio And Proportion).

Section V: Calculating Drug Dosages In The Metric System

18. Mysoline 375 mg is ordered. Scored tablets available are 250 mg. How many
tablets would

you give?

19. A dosage of 25 mg of methazolamide has been ordered. Scored tablets
available are 50

mg. How many tablets would you give?

20. Estinyl tablets are 0.05 mg. How many tablets would you prepare to give a
0.1 mg dosage?

Section VI: Calculating Drug Dosages In The Apothecary System And With Household

Measurements

21. Terpin hydrate 2 tsp. has been ordered. How many mLs would you give?

22. You are preparing a gr ½ IM dosage of phenobarbital from a solution with a
strength of gr 3/4

per mL. How many mLs will you give?

23. Codeine IM is available in a gr ss per mL solution. How many mLs would you
prepare to

give a gr i dosage?

Section VII: Converting Within & Between Systems

24. Benztropine mesylate 1500 mcg has been ordered t .i.d. The dosage strength
available is

0.5 mg per tablet. How many tablets would you give?

25. An initial dose of 1.1 g has been ordered. Capsules are 550 mg in strength.
How many

capsules would you give?

26. You are preparing a 15 mg dosage of morphine from a solution labeled gr 1/6
per mL. How many

mL will you draw up ?

Section VIII: Calculating Drug Dosages in Milliequivalents & Units

27. The order is for Phizerpen-AS 400,000 U q12h. Vial strength is 300,000 U per
mL. How

many mLs would you give?

28. A 5,000 U per mL solution of heparin sodium is available. How many mLs would
you

prepare to give a 7,500 U dosage?

Section IX: Reconstituting Powdered Drugs For Injection

29. Amoxil oral suspension is prepared as a 7.5 g powder for reconstitution. The
directions are

to add 111 mL of water and shake until dissolved. The reconstituted solution has
a strength

of 250 mg per 5 mL. How many mLs would you prepare to give a 0.5 g dosage?

30. To prepare a 100 mg/cc solution of Chloromycetin from the powdered drug, you
must add 10

cc of sterile water to the vial. How many ccs would you draw up to give a 0.25 g
dosage?

Section X: Calculating IV Drip Rates

31. The doctor orders the IV to run at 125 cc per hour. The drip chamber
delivers 10

gtts per cc. How many gtts per minute will the nurse set the infusion rate?

32. The doctor orders the IV to run at 150 cc per hour. The drip chamber
delivers 20 gtts per

cc. How many gtts per minute will the nurse set the infusion rate?

Section XI: Calculating IV Infusion Rates

33. The doctor orders 1 gram of Ampicillin. The Ampicillin is packaged in 125cc.
The

infusion rate is 125 cc/hr. How long will it take to infuse the Ampicillin?

34. The doctor orders gentamicin 350 mg q 8 hr. The gentamicin is packaged in
150cc. The

prescribed rate of infusion is 75 cc per hour. How long will it take to infuse
the gentamicin?

35. How many hours will it take to infuse 1000 mL of D5NS if the ordered
infusion rate is 125

cc per hour?

36. The nurse hangs an IVPB with 1 gram of Ampicillin in 50 cc. The ordered
infusion rate is

100 cc per hour. How long will it take to infuse the Ampicillin?

Section XII: Calculating Pediatric Dosages and Critical Care Dosages

37. The recommended daily dosage of PO Keflex is 25-50 mg/kg/day in divided
doses q6h.

For a child weighing 44 lbs., what is the safe recommended dosage range for a 24
hour

period?

38. Ordered Erythromycin 30 mg/kg/day in divided doses tid.
For a child weighing 11 lbs.,

how many mg of Erythromycin should be given in a single dose?

39. Order: Regular Insulin IV at 12 U/hr. The concentration is Insulin 200U in
500mL of

0.9% NS. The IV pump should be programmed for how many mL/hr?

**ANSWER SHEET**

**Section I**

1.623

2.154

3.23,520

4.16.224137

**Section II**

5.14/45

6.21/32

7.6 ¾

8.36

**Section III**

9.12.33

10.22.506

11.6.8085

12.70.888

13.30.538461

**Section IV**

14.7.5

15.

0.5

16.10

**Section V**

18.1 ½ tablets

19.½ tablet

20.2 tablets

**Section VI**

21.10 mL

22.0.67 mL

23.2 mL

**Section VII**

24.3 tablets

25.2 capsules

26.1.5 mL

**Section VIII**

27.1.3 mL

28.1.5 mL

**Section IX**

29.10 mL

30.2.5 cc

**Section X**

31.21 gtt/min

32.50 gtt/min

**Section X**I

33.1 hr

34.2 hr

35.8 hr

36.30 min

**Section XII**

37.500-1000mg/24h

38.50mg/dose

39.30ml/h

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