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SelfAssessment On Dosage Calcul
SelfAssessment On Dosage Calculation Skills
Instructions:
The purpose of this selfassessment 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
selfassessment 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 PhizerpenAS 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 2550 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 XI
33.1 hr
34.2 hr
35.8 hr
36.30 min
Section XII
37.5001000mg/24h
38.50mg/dose
39.30ml/h
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