Calculating Drug Dosages
Full Test Bank_
Calculating Drug Dosages: A Patient-Safe Approach
To Nursing And Math 2nd Edition
By Castillo | Werner-Mccullough updated latest
2025.
Page | 1
, Calculating Drug Dosages
Table Of Contents
Chapter 1: Safety In Medication Administration....................................................................................... 3
Chapter 2: The Drug Label ......................................................................................................................... 7
Chapter 3: The Metric System ................................................................................................................. 13
Chapter 4: The Household System .......................................................................................................... 18
Chapter 5: Linear Ratio And Proportion .................................................................................................. 21
Chapter 6: Fractional Ratio And Proportion ............................................................................................ 27
Chapter 7: Dimensional Analysis ............................................................................................................. 35
Chapter 8: Formula Method .................................................................................................................... 42
Chapter 9: Calculating Oral Medication Doses........................................................................................ 50
Chapter 10: Syringes And Needles .......................................................................................................... 57
Chapter 11: Calculating Parenteral Medication Doses ........................................................................... 64
Chapter 12: Preparing Powdered Parenteral Medication....................................................................... 71
Chapter 13: Administration Of Insulin .................................................................................................... 80
Chapter 14: Intravenous Infusion And Infusion Rate .............................................................................. 88
Chapter 15: Calculating Infusion And Completion Time ......................................................................... 95
Chapter 16: Administering Direct Iv Medications ................................................................................. 101
Chapter 17: Verifying Safe Dose ............................................................................................................ 112
Chapter 18: Titration Of Intravenous Medications ............................................................................... 122
Chapter 19: Calculating Input And Output ............................................................................................ 129
Chapter 20: Calculating Parenteral Intake ............................................................................................ 138
Chapter 21: Considerations For The Pediatric Patient .......................................................................... 146
Chapter 22: Considerations For The Older Adult .................................................................................. 155
Page | 2
, Calculating Drug Dosages
Chapter 1: Safety In Medication Administration
Castillo: Calculating Drug Dosages: A Patient-Safe Approach To Nursing And Math 2nd Edition
Multiple Choice
1. The Following Medication Order Is In The Patient’s Medication Administration Record (Mar):
Methylprednisolone 40 Mg Po Daily At 0900.
After Reading The Order, The Nurse Correctly Determines:
A “Po” Is An Inappropriate Abbreviation.
B The Medication Order Is Written Correctly.
C 40 Mg Should Be Written As 40mg.
D Tall Man Lettering Indicates That The Drug Is A Narcotic.
Ans: B
Feedback
The Medication Order Has All The Required Components (Drug Name, Dose, Route, And Frequency Of
Administration) For A Drug Order. “Po” Is An Appropriate Abbreviation; 40 Mg Is Written Correctly With
A Space Between The Dose And The Unit Of Measurement. Tall Man Lettering Is Used To Distinguish The
Drug From Another Drug
With A Similar Name.
2. Which Of The Following Accurately Describes The “Boxed Warning” Found On A Drug Label?
A It Is Primarily Is Used To Identify The Safe Dose For The Patient.
B It Is Commonly Found On All Drug Labels.
C It Identifies Serious Potential Risks And Side Effects Related To Drug Use.
D It Protects The Patient By Providing Information To Decrease Side Effects.
Ans: C
Feedback
A Drug Label With A Boxed Warning Provides Information To Healthcare Professionals And Patients
Regarding The Serious Risks And Side Effects Related To The Drug. The Boxed Warning Is Not The
Primary Source For Identifying The Patient’s Drug Dosage.
The Warning Is Found On Specific Prescription Medications And Does Not Provide Information To
Reduce Or Decrease Side Effects.
3. When Practicing Safety In The Administration Of Medication, For Which Of The Following
Medication Orders Should A Nurse Seek Clarification Before The Administration Of The Medication?
A Regular Insulin 5 U Subcut Now.
Page | 3
, Calculating Drug Dosages
B Enoxaparin 80 Mg Subcut Every 12 Hours.
C Benadryl 50 Mg Po Prn Every 6 Hr For Itching.
D Ondansetron 4 Mg Ivp Stat.
Ans: A
Feedback
The “U” Should Never Be Used In A Medication Order; Rather, For Safety, The Word “Units” Should Be
Spelled Out. The Other Answer Options Contain The Required
Components Needed To Safely Carry Out The Medication Order.
4. A Nurse Is Reviewing A Drug Label With A Drug Name Written With Tall Man Lettering. Which
Statements Shows The Nurse Has A Correct Understanding Of Tall Man Lettering On A Drug Label?
A “The Tall Man Lettering Means This Is A High Alert Drug.”
B “The Tall Man Lettering Helps Me Distinguish This Drug With Other Drugs That
Have Similar Names.”
C “The Tall Man Lettering Means That This Drug Must Have A Boxed Warning.”
D “The Tall Man Lettering Helps Me Quickly Identify That This Drug Is An Injectable
Drug.”
Ans: B
Feedback
Tall Man Lettering Highlights A Portion Of The Drug Name To Help Distinguish From Similar Drug Names.
It Is Not Used To Identify High Alert Drugs, Highlight A Boxed
Warning, Or Identify Injectable Drugs.
5. The Following Medication Orders Are Found In The Patient’s Mar:
Metformin Hcl 500 Mg Po Daily At 0900. Hydrochlorothiazide 25 Mg Po Every 12 Hr At 0900 And 2100.
Digoxin .25 Mg Po Daily At 0900.
In Reading The Medication Orders For The 0700–1500 Shift, The Nurse Determines That Which Of The
Following Is The Priority Nursing Intervention?
A Clarify The Metformin Hcl Order.
B Clarify The Hydrochlorothiazide Order.
C Clarify The Digoxin Order.
D Prepare To Administer The 0900 Medications.
Ans: C
Feedback
Page | 4
Full Test Bank_
Calculating Drug Dosages: A Patient-Safe Approach
To Nursing And Math 2nd Edition
By Castillo | Werner-Mccullough updated latest
2025.
Page | 1
, Calculating Drug Dosages
Table Of Contents
Chapter 1: Safety In Medication Administration....................................................................................... 3
Chapter 2: The Drug Label ......................................................................................................................... 7
Chapter 3: The Metric System ................................................................................................................. 13
Chapter 4: The Household System .......................................................................................................... 18
Chapter 5: Linear Ratio And Proportion .................................................................................................. 21
Chapter 6: Fractional Ratio And Proportion ............................................................................................ 27
Chapter 7: Dimensional Analysis ............................................................................................................. 35
Chapter 8: Formula Method .................................................................................................................... 42
Chapter 9: Calculating Oral Medication Doses........................................................................................ 50
Chapter 10: Syringes And Needles .......................................................................................................... 57
Chapter 11: Calculating Parenteral Medication Doses ........................................................................... 64
Chapter 12: Preparing Powdered Parenteral Medication....................................................................... 71
Chapter 13: Administration Of Insulin .................................................................................................... 80
Chapter 14: Intravenous Infusion And Infusion Rate .............................................................................. 88
Chapter 15: Calculating Infusion And Completion Time ......................................................................... 95
Chapter 16: Administering Direct Iv Medications ................................................................................. 101
Chapter 17: Verifying Safe Dose ............................................................................................................ 112
Chapter 18: Titration Of Intravenous Medications ............................................................................... 122
Chapter 19: Calculating Input And Output ............................................................................................ 129
Chapter 20: Calculating Parenteral Intake ............................................................................................ 138
Chapter 21: Considerations For The Pediatric Patient .......................................................................... 146
Chapter 22: Considerations For The Older Adult .................................................................................. 155
Page | 2
, Calculating Drug Dosages
Chapter 1: Safety In Medication Administration
Castillo: Calculating Drug Dosages: A Patient-Safe Approach To Nursing And Math 2nd Edition
Multiple Choice
1. The Following Medication Order Is In The Patient’s Medication Administration Record (Mar):
Methylprednisolone 40 Mg Po Daily At 0900.
After Reading The Order, The Nurse Correctly Determines:
A “Po” Is An Inappropriate Abbreviation.
B The Medication Order Is Written Correctly.
C 40 Mg Should Be Written As 40mg.
D Tall Man Lettering Indicates That The Drug Is A Narcotic.
Ans: B
Feedback
The Medication Order Has All The Required Components (Drug Name, Dose, Route, And Frequency Of
Administration) For A Drug Order. “Po” Is An Appropriate Abbreviation; 40 Mg Is Written Correctly With
A Space Between The Dose And The Unit Of Measurement. Tall Man Lettering Is Used To Distinguish The
Drug From Another Drug
With A Similar Name.
2. Which Of The Following Accurately Describes The “Boxed Warning” Found On A Drug Label?
A It Is Primarily Is Used To Identify The Safe Dose For The Patient.
B It Is Commonly Found On All Drug Labels.
C It Identifies Serious Potential Risks And Side Effects Related To Drug Use.
D It Protects The Patient By Providing Information To Decrease Side Effects.
Ans: C
Feedback
A Drug Label With A Boxed Warning Provides Information To Healthcare Professionals And Patients
Regarding The Serious Risks And Side Effects Related To The Drug. The Boxed Warning Is Not The
Primary Source For Identifying The Patient’s Drug Dosage.
The Warning Is Found On Specific Prescription Medications And Does Not Provide Information To
Reduce Or Decrease Side Effects.
3. When Practicing Safety In The Administration Of Medication, For Which Of The Following
Medication Orders Should A Nurse Seek Clarification Before The Administration Of The Medication?
A Regular Insulin 5 U Subcut Now.
Page | 3
, Calculating Drug Dosages
B Enoxaparin 80 Mg Subcut Every 12 Hours.
C Benadryl 50 Mg Po Prn Every 6 Hr For Itching.
D Ondansetron 4 Mg Ivp Stat.
Ans: A
Feedback
The “U” Should Never Be Used In A Medication Order; Rather, For Safety, The Word “Units” Should Be
Spelled Out. The Other Answer Options Contain The Required
Components Needed To Safely Carry Out The Medication Order.
4. A Nurse Is Reviewing A Drug Label With A Drug Name Written With Tall Man Lettering. Which
Statements Shows The Nurse Has A Correct Understanding Of Tall Man Lettering On A Drug Label?
A “The Tall Man Lettering Means This Is A High Alert Drug.”
B “The Tall Man Lettering Helps Me Distinguish This Drug With Other Drugs That
Have Similar Names.”
C “The Tall Man Lettering Means That This Drug Must Have A Boxed Warning.”
D “The Tall Man Lettering Helps Me Quickly Identify That This Drug Is An Injectable
Drug.”
Ans: B
Feedback
Tall Man Lettering Highlights A Portion Of The Drug Name To Help Distinguish From Similar Drug Names.
It Is Not Used To Identify High Alert Drugs, Highlight A Boxed
Warning, Or Identify Injectable Drugs.
5. The Following Medication Orders Are Found In The Patient’s Mar:
Metformin Hcl 500 Mg Po Daily At 0900. Hydrochlorothiazide 25 Mg Po Every 12 Hr At 0900 And 2100.
Digoxin .25 Mg Po Daily At 0900.
In Reading The Medication Orders For The 0700–1500 Shift, The Nurse Determines That Which Of The
Following Is The Priority Nursing Intervention?
A Clarify The Metformin Hcl Order.
B Clarify The Hydrochlorothiazide Order.
C Clarify The Digoxin Order.
D Prepare To Administer The 0900 Medications.
Ans: C
Feedback
Page | 4
