Dosage Calculations Exam Review
Course Introduction
Dosage Calculations provides students with the foundational mathematical skills and techniques necessary for accurate medication administration in healthcare settings. The course covers essential topics such as unit conversions, calculation of oral and parenteral dosages, intravenous flow rates, pediatric dosages, and interpreting medication orders. Emphasis is placed on critical thinking and problem-solving to ensure patient safety and reduce medication errors. Students will engage in practical exercises and case studies to develop precision and confidence in real-world clinical scenarios.
Recommended Textbook
Calculate with Confidence 7th Edition by Morris
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25 Chapters
610 Verified Questions
610 Flashcards
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Page 2
Chapter 1: Roman Numerals
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11 Verified Questions
11 Flashcards
Source URL: https://quizplus.com/quiz/70252
Sample Questions
Q1) Perform the indicated operation and record the result in lowercase Roman numerals.
10 + 2 = _____
Answer: xii
Q2) Write the following Arabic number as a lowercase Roman numeral. \(11 ^ { 1 } / _2\) = _____
Answer: xiss
Q3) Perform the indicated operation and record the result in lowercase Roman numerals.
13 + 7 = _____
Answer: xx
Q4) Perform the indicated operation and record the result in lowercase Roman numerals.
7 * 2 = _____
Answer: xiv
Q5) Perform the indicated operation and record the result in lowercase Roman numerals.
29 - 1 = _____
Answer: xxviii
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Chapter 2: Fractions
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42 Verified Questions
42 Flashcards
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Sample Questions
Q1) Perform the indicated operation with fractions. Reduce to lowest terms as indicated. 8/16 - 1/4 = _____
Answer: 1/4
Q2) Indicate which fraction is the largest. 1/100, 1/150, 1/200: _____
Answer: 1/100
Q3) Perform the indicated operation with fractions. Reduce to lowest terms as indicated. 15/21 - 10/21 = _____
Answer: 5/21
Q4) Perform the indicated operation with fractions. Reduce to lowest terms as indicated. 6 5/16 + 5 3/16 = _____
Answer: 11 1/2
Q5) Change the following mixed number to an improper fraction. 9 1/9 = _____
Answer: 82/9
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4
Chapter 3: Decimals
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35 Verified Questions
35 Flashcards
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Sample Questions
Q1) Round off the following decimal to the nearest thousandth.
0.6253 = _____
Answer: 0.625
Q2) Perform the indicated operation with decimals.
0.123 + 0.4 = _____
Answer: 0.523
Q3) Round off the following decimal to the nearest tenth. 1.45 = _____
Answer: 1.5
Q4) Perform the indicated operation with decimals.
66.66 * 3.33 = _____
Answer: 221.9778
Q5) A client is brought into the emergency department with a body temperature of 95.2S1U1P1\(\circ\)S1S1P0F. If the normal body temperature is 98.6S1U1P1\(\circ\)S1S1P0 F, how far below normal was the client's temperature? _____
Answer: 3.4S1U1P1\(\circ\)S1S1P0 F
Q6) Change the following decimal to a fraction. Reduce to lowest terms if indicated.
0.006 = _____
Answer: 3/500
Page 5
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Chapter 4: Ratio and Proportion
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25 Verified Questions
25 Flashcards
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Sample Questions
Q1) Solve for x. 1/0.05 = x/0.1
x = _____
Q2) Solve for x. 16/40 = x/55
x = _____
Q3) If 1 ounce (oz) is equal to 30 mL, how many mL are there in \(4 ^ { 3 } / _4\) oz? (State answer as a decimal number.) ______
Q4) If 5oz of a solution contains 4 1/2 oz of water, how many oz of water are in 20 oz of solution? _______
Q5) Solve for x in the following. 0.5/0.125 = x/4
x = _____
Q6) A nurse counts a client's pulse, which is regular for 15 seconds (sec) and gets 19 beats. If the nurse counts the pulse for 60 sec, how many beats should there be? _____
Q7) If there are 2.5 centimeters (cm) to an inch, if a client is 70 inches (in.) tall, how tall is the client in cm? ____
Q8) Solve for x. \(\frac { 0.25 } { 2 } = \frac { x } { 1 / 2 }\) x = _____
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Chapter 5: Percentages
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20 Verified Questions
20 Flashcards
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Sample Questions
Q1) Change the following percentage to a ratio and its decimal equivalent. 45% = _____; _____
Q2) A client is responsible for 30% of his doctor bills due to insurance. The client sees a specialist and the bill is $240.00. How much will the client be responsible for? _____
Q3) A client who weighed 210 pounds (lb) lost 30 lb. What was the percent of decrease in the client's weight? (State answer to the nearest whole percent.) _____
Q4) A client consumed 30% of a bowl of broth. The bowl held 360 mL. How many mL of the broth did the client consume? _____
Q5) Find the following percentage. 16% of 79 = _____
Q6) Change the following percentage to a ratio. \(16 \frac { 2 } { 3 } \%\) = _____
Q7) Convert 2.96 to a percent. _____
Q8) A client was able to drink 85% of a 1,000 milliliter (mL) bottle of an x-ray prep. How many mL did the client drink? _____
Q9) Convert 0.925 to a percent. _____
Q10) Convert 84.75% to decimal form. _____
Q11) Convert 42.5% to decimal form. _____
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Chapter 6: Metric System
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Sample Questions
Q1) Directions: Write the equivalent indicated.
1 kg = _____ g
Q2) Directions: Write the equivalent indicated.
1 L = _____ mL
Q3) Directions: Write the equivalent indicated.
7.45 mL = _____ L
Q4) Three and one half kilograms:
A) 3.5 kg
B) 3.05 kg
C) \(3^1 / _2\)kg
D) 3.5 kg.
Q5) Gram is the basic unit of weight in the metric system.
A)True
B)False
Q6) Trailing zeros should be placed on quantities to avoid misinterpretation of a value.
A)True
B)False
Q7) Directions: Write the equivalent indicated. 3,120 mcg = _____ mg
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Chapter 7: Apothecary and Household Systems
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33 Verified Questions
33 Flashcards
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Sample Questions
Q1) Directions: Write the abbreviation for the term. drop: _____
Q2) A capital "U" is an acceptable abbreviation for units.
A)True B)False
Q3) Directions: Express the following value correctly. 2.75 OZ
Q4) Milliequivalent is a unit used to measure the ionic activity of a medication.
A)True B)False
Q5) The household system (Select all that apply.)
A) is more accurate than the metric system.
B) expresses quantities using Arabic numbers and decimals.
C) is primarily used for dosages at home.
D) expresses quantities in fractions and Arabic numbers.
E) is preferred for medication administration.
F) has measures such as tbs and tsp.
Q6) Directions: Write the equivalent indicated. \(2 ^ { 3 } /_ 4\) C = ______ mL
Q7) Directions: Write the equivalent indicated. 5 t = _____ mL
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Chapter 8: Converting Within and Between Systems
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27 Verified Questions
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Sample Questions
Q1) Directions: Write the equivalent indicated. 4,176 g = _____ kg
Q2) A client received 5.4 liters of IV fluid during a surgical procedure. How many mL of IV fluid did the client receive? _____ mL
Q3) Directions: Write the equivalent indicated. 2 oz = _____ tbs
Q4) Directions: Write the equivalent indicated. 2,575 mL = _______ L
Q5) Directions: Write the equivalent indicated. 0.005 g = _____ mg
Q6) Directions: Write the equivalent indicated. 45 kg = _______ lb
Q7) Directions: Write the equivalent indicated. 28.3 kg = _____ lb
Q8) A client had a physical a year ago and weighed 85 kg. The client tells you he lost 11 lb. What is the client's current weight in kg? _______ kg
Q9) A client drinks 300 mL of magnesium citrate. How many ounces did the client consume? _____ oz
Q10) Directions: Write the equivalent indicated. \(4^1 /_4\) qt = _____ mL
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Chapter 9: Additional Conversions Useful in the Health Care Setting
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40 Verified Questions
40 Flashcards
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Sample Questions
Q1) Directions: Convert the following weight as indicated. Round weight to the nearest tenth.
41 lb, 2 oz = _____ kg
Q2) Directions: Convert the following temperature as indicated.
39° C = _____° F
Q3) Directions: Convert the following weight as indicated. Round weight to the nearest tenth.
7.6 kg = _____ lb
Q4) Directions: Convert as indicated.
34 mm = _____ cm
Q5) Directions: Convert the following weight as indicated. Round weight to the nearest tenth.
63 kg = _____ lb
Q6) Directions: Write the equivalent indicated. 1 kg = _____ lb
Q7) Directions: Convert the following time to international time. 12:19 AM ________________
11
Q8) Directions: Convert the following temperature as indicated.
212° F = _____° C
Q9) A wound measures 4.2 cm in length. How many mm is this? _____ mm
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Page 12
Chapter 10: Medication Administration
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18 Verified Questions
18 Flashcards
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Sample Questions
Q1) Medication errors (Select all that apply.)
A) are preventable.
B) are less prevalent in children and elderly.
C) cause an increase in health care cost.
D) can occur when the six rights of medication administration are not adhered to.
E) can result in tragic outcomes including death.
F) occur in the hospital setting only.
Q2) Directions: Complete the following sentence with the correct word or number. The use of posters and brochures to encourage clients to use strategies to avoid medication errors is called the _____________.
Q3) Which of the following are considered unique identifiers in addition to the full name of a client when establishing the identification of a client? (Select all that apply.)
A) Room number of the client.
B) Client's medical record number.
C) Initials of the client's name.
D) Client's date of birth.
E) Name of the client's medication.
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13
Chapter 11: Understanding and Interpreting Medication
Orders
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25 Verified Questions
25 Flashcards
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Sample Questions
Q1) Directions: Correct the following medication order using the ISMP list of Error-Prone Abbreviations, Symbols, and Dose Designations.
Motrin 400 mg po q6h prn for back pain
Q2) CPOE is an abbreviation for _______________.
Q3) Directions: Correct the following medication order using the ISMP list of Error-Prone Abbreviations, Symbols, and Dose Designations.
Lasix 40.0 mg po qd
Q4) Directions: Give the abbreviation for the following. Twice a day: _____
Q5) Verbal orders should be accepted only in _______________.
Q6) "Administer Colace 100 mg by mouth three times a day." Which of the following correctly indicates the order?
A) Colace 100 mg p.o. t.i.d.
B) Colace 100 mg p.o.b.i.d.
C) Colace mg 100.0 p.o. q.i.d.
D) Colace MG 100 p.o. t.i.d.
Q7) Directions: Give the abbreviation for the following. Every four hours: _____
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Chapter 12: Medication Administration Records and Medication Distribution Systems
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16 Verified Questions
16 Flashcards
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Sample Questions
Q1) What are the client's medication allergies? ______________
Q2) A client refuses a p.o. medication and provides the nurse with a reason for refusing the medication. What should the nurse's action be?
A) Inform the client they cannot refuse a medication.
B) Report it to the nurse manager.
C) Administer the medication by an injectable route.
D) Document the refusal and inform the prescriber.
Q3) K-Dur 10 mEq is ordered. What does mEq mean? _______________
Q4) How many hours are between the scheduled times for K-Dur? _______________
Q5) The prescriber orders a medication q8h. The nurse enters the following times on the medication administration record (MAR): 12 AM-6 AM-12 PM-6 PM. What error has occurred?
Q6) You work from 3 PM to 11 PM on May 3, 2017. Which standing medication will you administer to the client? _______________
Q7) What are the scheduled times for administering K-Dur? (State in traditional times.)
Q8) What dose of heparin is to be administered? _______________
Q9) How many times in a 24-hour period will K-Dur be administered? Page 15
Q10) By what route will the heparin be administered? _______________
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Chapter 13: Reading Medication Labels
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Sample Questions
Q1) A medication label reads "Calan SR (verapamil hydrochloride) 240 mg sustained release caplets." The form is A) caplets.
B) sustained-release caplets.
C) 240 mg.
D) verapamil hydrochloride.
Q2) If a medication label reads "Ambien (zolpidem tartrate) 5 mg tablets, Searle," the medication's generic name is A) Ambien.
B) Searle.
C) zolpidem tartrate.
D) tablets.
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17
Chapter 14: Dosage Calculation Using the Ratio and Proportion Method
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15 Verified Questions
15 Flashcards
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Sample Questions
Q1) Directions: Calculate the following dosage using the ratio and proportion method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Thorazine 25 mg p.o. t.i.d.
Available: Thorazine syrup labeled 10 mg per 5 mL
Q2) Directions: Calculate the following dosage using the ratio and proportion method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Calcijex 1.5 mcg IV daily on Mon., Wed., Fri.
Available: Calcijex 1 mcg per mL
Q3) Directions: Calculate the following dosage using the ratio and proportion method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Amoxil 0.5 g p.o. q6h
Available: Amoxil capsules labeled 250 mg per capsule
Q4) Directions: Calculate the following dosage using the ratio and proportion method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Clindamycin 0.6 g IV q12h
Available: Clindamycin 300 mg per 2 mL
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Page 18
Chapter 15: Dosage Calculation Using the Formula Method
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14 Verified Questions
14 Flashcards
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Sample Questions
Q1) Directions: Calculate the following dosage using the formula method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Compazine 8 mg p.o. stat
Available: Compazine syrup labeled 5 mg per 5 mL
Q2) Directions: Calculate the following dosage using the formula method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Thorazine 15 mg IM stat
Available: Thorazine 25 mg per mL
Q3) Directions: Calculate the following dosage using the formula method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Calcijex 1.5 mcg IV daily on Mon., Wed., Fri.
Available: Calcijex 1 mcg per mL
Q4) Directions: Calculate the following dosage using the formula method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Amoxil 0.5 g p.o. q6h
Available: Amoxil capsules labeled 250 mg per capsule
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19
Chapter 16: Dosage Calculation Using the Dimensional Analysis Method
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12 Verified Questions
12 Flashcards
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Sample Questions
Q1) Directions: Calculate the following dosage using the dimensional analysis method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Raloxifene HCl 60 mg p.o.b.i.d.
Available: Raloxifene HCl tablets labeled 60 mg per tablet
Q2) Directions: Calculate the following dosage using the dimensional analysis method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Zofran 7 mg p.o.b.i.d.
Available: Zofran oral solution labeled 4 mg per 5 mL
Q3) Directions: Calculate the following dosage using the dimensional analysis method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Thorazine 15 mg IM stat
Available: Thorazine 25 mg per mL
Q4) Directions: Calculate the following dosage using the dimensional analysis method. Round mL answers to the nearest tenth unless otherwise indicated.
Order: Ampicillin 0.375 g IM q6h
Available: Ampicillin 250 mg per mL
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Page 20
Chapter 17: Oral Medications
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Sample Questions
Q1) Directions: Complete with the correct word(s) or number. An elongated tablet for easy swallowing is referred to as a _______________.
Q2) Directions: Calculate the following dosage. Use labels where provided. Round oral liquids to the nearest tenth as indicated.
Order: Diazepam 4 mg via nasogastric tube t.i.d.
Available: Diazepam oral solution 5 mg per 5 mL
a. How many milliliters should the client receive per dosage? _____ mL
b. How many milligrams will the client receive per day? _____ mg
Q3) Directions: Complete with the correct word(s) or number. The most common form of oral medication is the __________.
Q4) Directions: Complete with the correct word(s) or number.
Enteric-coated tablets and time-release tablets should never be _______________.
Q5) Directions: Complete with the correct word(s) or number. Sublingual tablets must never be _______________ but placed _______________ the tongue.
Q6) 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 _______________.
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Chapter 18: Parenteral Medications
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30 Verified Questions
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Sample Questions
Q1) 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: Levothyroxine sodium 0.3 mg IV daily
Available: Levothyroxine sodium 200 mcg per 5 mL How many milliliters will you add to the IV? _____ mL
Q2) Directions: Complete the following statements with the correct word(s) or number(s).
The term used for injectable medications is _______________.
Q3) Directions: Complete the following statements with the correct word(s) or number(s).
If a nurse calculates a dosage of 3.39 mL of medication, which size syringe should the nurse select? _____ What would be the nearest measurable dose on the syringe?
Q4) A 3-mL syringe is calibrated in which of the following increments?
A) 0.01 mL
B) 0.1 mL
C) 0.2 mL
D) 1 mL
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Chapter 19: Reconstitution of Solutions
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Sample Questions
Q1) Directions: Prepare the following strength solutions. Describe your calculations. Prepare irrigant 250 mL 1/2 strength solution: ______________________________
Q2) Directions: Prepare the following strength solutions. Describe your calculations. 360 mL of 1/4 strength Ensure percutaneous endoscopic (PEG) tube over 4 hours
Q3) 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
Q4) 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
Q5) 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
Q6) Directions: Prepare the following strength solutions. Describe your calculations. 800 mL of 3/4 strength Sustacal via gastrostomy over 6 hours
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23
Chapter 20: Insulin
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Sample Questions
Q1) U-100 on the label of an insulin vial me ______________________________.
Q2) What is the difference between the calibration of units on the 1-mL insulin syringe and on the Lo-Dose syringe? ______________________________
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Chapter 21: Intravenous Solutions and Equipment
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Sample Questions
Q1) 250 mL D5NS _______ g dextrose ________ g NaCl
Q2) 500 mL \(^1 /_ 2\) NS sodium chloride (NaCl): _____
Q3) 5 L D10W dextrose: _______________
Q4) 0.5 L D \(5^1 / _4\) NS ________ g dextrose ________ g NaCl
Q5) The IV line that can be used to administer medications and solutions and can be connected to a port on the main infusion is called _______________.
Q6) An IV pump is an example of an ___________ infusion device.
Q7) _______________ devices allow a client to self-administer pain medication.
Q8) Directions: Interpret the following IV orders.
1,000 mL (1 L) D5W to infuse at a rate of 100 mL per hour
Q9) In IV fluid abbreviations, D5NS identifies what IV fluid? _______________
Q10) List the components and percentage strengths of the following IV solutions.
a. D5
\(^1 / _4\) S
b. D5NS 10 mEq KCl
c. D5RL
Q11) Directions: Interpret the following IV orders.
1,000 mL (1 L) of L/R q8h
Q12) The name for the main infusion administration set is _______________. Page 25
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Chapter 22: Intravenous Calculations
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Sample Questions
Q1) Directions: Determine the flow rate for the following IV being administered by infusion pump.
Clindamycin 600 mg in 100 mL D5W over \(1^1 / _2\) hr: _____
Q2) 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? _____
Q3) 150 mL D5W \(^1 / _2\) NS infusing at 20 macrogtt/min. Drop factor: 15 gtt/mL. Calculate the infusion time: _____
Q4) When an IV medication is injected directly into a vein, the procedure is referred to as ________________.
Q5) Directions: Determine the following in drops per minute using the drop factor provided.
250 mL of packed cells in 4 hr
a. mL/hr _____
b. gtt/min (drop factor: 20 gtt/mL): _____
Q6) Directions: Determine the flow rate for the following IV being administered by infusion pump.
500 mL of Intralipid in 6 hr: _____
Q7) Total parenteral nutrition (TPN) solution of 1,000 mL at 30 mL/hr
Determine the infusion time: _____
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Chapter 23: Heparin Calculations
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Sample Questions
Q1) A client weighs 165 lb. Order: Administer a bolus of heparin sodium IV. The hospital protocol is 80 units/kg. How many units will you administer? _____
Q2) A client weighs 110 lb. The hospital protocol is 18 units/kg/hr. How many units per hour will the client receive? ___________________
Q3) Which solution of heparin is more concentrated: 1,000 units per mL or 10,000 units per mL? _____
Q4) Order: 45,000 units of heparin in 1,000 mL D5 \(^1 / _2\) /2 NS at 25 mL/hr units/hr = _____
Q5) Order: 30,000 units of heparin in 500 mL D5W to infuse at 15 mL/hr units/hr = _____
Q6) Order: Heparin bolus dosage of 40 units/kg IV prior to initiating a continuous infusion. The client weighs 132 lb.
Available: Heparin 1,000 units per mL
a. Calculate the bolus dosage ______________________
b. Calculate the number of mL that will be needed to administer the dose.
Q7) Order: 40 units/kg/hr heparin IV. The client weighs 50 kg. How many units should the client receive per hour? _____
Page 28
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Chapter 24: Critical Care Calculations
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Sample Questions
Q1) A client is receiving dopamine 800 mg in 500 mL D5W infusing at a rate of 30 mL/hr.
a. mg/hr: _____
b. mcg/min: _____
Q2) Order: Dobutamine 2.5 mcg/kg/min for a client who weighs 193 lb
Available: Dobutamine 250 mg in 250 mL D5W
a. What is the client's weight in kilograms? _____ (to the nearest tenth)
b. Calculate the rate in mL/hr required to infuse 2 mcg/kg/min: _____
Q3) 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: _____
Q4) A client is receiving procainamide 1 g in 500 mL D5W at 120 mL/hr.
a. mg/hr: _____
b. mg/min: _____
Q5) 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 min 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.
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Chapter 25: Pediatric and Adult Dosage Calculation Based on Weight
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Sample Questions
Q1) Directions: Using the West nomogram or formula when indicated, calculate the following dosages. Express answer to the nearest tenth. The recommended dosage of acyclovir is 250 mg/m<sup>2</sup>. What will be the dosage for a child with a BSA of 0.27 m<sup>2</sup>? _____
Q2) An adult who is 67 inches tall and weighs 175 lb: _____ m<sup>2</sup>
Q3) An adult who measures 175 cm and weighs 85 kg: _____ m<sup>2</sup>
Q4) 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-hr dosage range for this infant? _____
c. What is the divided dosage range? _____
d. Is the dosage ordered safe? (Prove mathematically.) _______________ Explain your action. ______________________________
Q5) 32 inches and 25 lb: _____ m<sup>2</sup>
Q6) 22 inches and 10 lb: _____ m<sup>2</sup>
Page 30
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