2026/2027
NU 578 Exam 2026/2027 Comprehensive
Study Guide, Practice Questions, Test Bank
Review, and Final Exam Preparation
Manual
Question 1:
A nurse administers an antihypertensive drug that effectively lowers blood pressure
but also causes nausea and headache. Which property of an ideal drug is lacking?
A. Potency
B. Selectivity
C. Efficacy
D. Reversibility
Correct Answer: B. Selectivity
Rationale:
Selectivity refers to a drug’s ability to target specific cells or receptors without
affecting others. In this case, the drug successfully lowers blood pressure (desired
effect) but also produces unwanted symptoms such as nausea and headache,
indicating it is acting on unintended sites. Potency refers to the amount of drug
needed for effect, efficacy refers to maximum effect achievable, and reversibility
relates to whether effects can be undone. The presence of side effects clearly points to
reduced selectivity.
Question 2:
Which drug property would most strongly indicate that a medication should not be
administered?
A. High cost
B. Slow onset
C. Ineffectiveness for intended use
D. Mild side effects
Correct Answer: C. Ineffectiveness for intended use
Rationale:
The primary goal of drug therapy is therapeutic effectiveness. If a drug does not
produce the intended therapeutic effect, administering it offers no benefit and may
expose the patient to unnecessary risks. While cost, onset time, and mild side effects
,2026/2027
are considerations, they do not outweigh the fundamental requirement that a drug
must be effective.
Question 3:
Why is ease of administration an important property of medications?
A. Reduces cost
B. Enhances drug potency
C. Minimizes administration errors
D. Improves drug absorption
Correct Answer: C. Minimizes administration errors
Rationale:
Ease of administration helps ensure that medications are given correctly and
consistently. Complex administration methods increase the likelihood of errors such
as incorrect dosing or improper timing. While ease may indirectly affect adherence
and outcomes, its most direct benefit is reducing medication errors, improving overall
patient safety.
Question 4:
A nurse advises a patient not to consume alcohol while taking nitroglycerin due to
risk of severe hypotension. Which concept does this illustrate?
A. Drug tolerance
B. Drug interaction
C. Drug metabolism
D. Drug efficacy
Correct Answer: B. Drug interaction
Rationale:
Drug interactions occur when one substance alters the effects of another. Alcohol
enhances the vasodilatory effect of nitroglycerin, leading to excessive hypotension.
This is not related to tolerance (reduced response over time) or metabolism directly,
but rather the combined effect of two substances producing a greater-than-expected
response.
Question 5:
When studying how a drug affects the body, the nurse is reviewing:
A. Pharmacokinetics
B. Pharmacodynamics
,2026/2027
C. Toxicology
D. Clinical trials
Correct Answer: B. Pharmacodynamics
Rationale:
Pharmacodynamics focuses on what the drug does to the body, including mechanisms
of action and physiological effects. Pharmacokinetics, on the other hand, describes
how the body absorbs, distributes, metabolizes, and excretes the drug. Understanding
pharmacodynamics helps nurses anticipate therapeutic and adverse effects.
Question 6:
The study of drug effects in humans is known as:
A. Pharmacology
B. Pharmacodynamics
C. Clinical pharmacology
D. Toxicokinetics
Correct Answer: C. Clinical pharmacology
Rationale:
Clinical pharmacology specifically examines how drugs affect humans, including
therapeutic outcomes and adverse reactions. It bridges basic pharmacology with
clinical practice. Pharmacology is broader, while pharmacodynamics and
pharmacokinetics are subfields within it.
Question 7:
Which statement by a nursing student indicates a need for further teaching?
A. Drugs can produce therapeutic and adverse effects
B. Drugs are used to diagnose and treat disease
C. Drugs are defined as illegal substances
D. Drug effects vary among individuals
Correct Answer: C. Drugs are defined as illegal substances
Rationale:
Drugs are not limited to illegal substances; they include any chemical used for
diagnosis, treatment, or prevention of disease. This misunderstanding reflects a
fundamental knowledge gap. The other statements are accurate and reflect correct
pharmacological understanding.
Question 8:
, 2026/2027
What is the nurse’s primary concern when administering medication?
A. Cost of therapy
B. Duration of action
C. Intensity of response
D. Drug classification
Correct Answer: C. Intensity of response
Rationale:
The intensity of a drug’s response determines both its therapeutic effectiveness and
risk for toxicity. Nurses must monitor how strongly a patient reacts to a medication to
ensure safety. Too little response means ineffective treatment, while excessive
response can lead to harm.
Question 9:
What is the primary objective of drug therapy?
A. Cure all diseases
B. Reduce healthcare costs
C. Provide maximum benefit with minimal harm
D. Eliminate symptoms only
Correct Answer: C. Provide maximum benefit with minimal harm
Rationale:
The goal of drug therapy is to achieve the desired therapeutic effect while minimizing
adverse effects. Complete cures are not always possible, and focusing only on
symptoms ignores underlying conditions. Safety and effectiveness must always be
balanced.
Question 10:
Which patient characteristics influence drug response? (Select all that apply)
A. Age
B. Gender
C. Weight
D. Genetics
Correct Answer: A, B, C, D
Rationale:
Drug response varies widely due to individual patient characteristics. Age affects
metabolism and organ function, gender influences hormonal and physiological
responses, weight impacts dosing, and genetics can alter drug metabolism and
receptor sensitivity. All listed factors are critical in personalizing drug therapy.
NU 578 Exam 2026/2027 Comprehensive
Study Guide, Practice Questions, Test Bank
Review, and Final Exam Preparation
Manual
Question 1:
A nurse administers an antihypertensive drug that effectively lowers blood pressure
but also causes nausea and headache. Which property of an ideal drug is lacking?
A. Potency
B. Selectivity
C. Efficacy
D. Reversibility
Correct Answer: B. Selectivity
Rationale:
Selectivity refers to a drug’s ability to target specific cells or receptors without
affecting others. In this case, the drug successfully lowers blood pressure (desired
effect) but also produces unwanted symptoms such as nausea and headache,
indicating it is acting on unintended sites. Potency refers to the amount of drug
needed for effect, efficacy refers to maximum effect achievable, and reversibility
relates to whether effects can be undone. The presence of side effects clearly points to
reduced selectivity.
Question 2:
Which drug property would most strongly indicate that a medication should not be
administered?
A. High cost
B. Slow onset
C. Ineffectiveness for intended use
D. Mild side effects
Correct Answer: C. Ineffectiveness for intended use
Rationale:
The primary goal of drug therapy is therapeutic effectiveness. If a drug does not
produce the intended therapeutic effect, administering it offers no benefit and may
expose the patient to unnecessary risks. While cost, onset time, and mild side effects
,2026/2027
are considerations, they do not outweigh the fundamental requirement that a drug
must be effective.
Question 3:
Why is ease of administration an important property of medications?
A. Reduces cost
B. Enhances drug potency
C. Minimizes administration errors
D. Improves drug absorption
Correct Answer: C. Minimizes administration errors
Rationale:
Ease of administration helps ensure that medications are given correctly and
consistently. Complex administration methods increase the likelihood of errors such
as incorrect dosing or improper timing. While ease may indirectly affect adherence
and outcomes, its most direct benefit is reducing medication errors, improving overall
patient safety.
Question 4:
A nurse advises a patient not to consume alcohol while taking nitroglycerin due to
risk of severe hypotension. Which concept does this illustrate?
A. Drug tolerance
B. Drug interaction
C. Drug metabolism
D. Drug efficacy
Correct Answer: B. Drug interaction
Rationale:
Drug interactions occur when one substance alters the effects of another. Alcohol
enhances the vasodilatory effect of nitroglycerin, leading to excessive hypotension.
This is not related to tolerance (reduced response over time) or metabolism directly,
but rather the combined effect of two substances producing a greater-than-expected
response.
Question 5:
When studying how a drug affects the body, the nurse is reviewing:
A. Pharmacokinetics
B. Pharmacodynamics
,2026/2027
C. Toxicology
D. Clinical trials
Correct Answer: B. Pharmacodynamics
Rationale:
Pharmacodynamics focuses on what the drug does to the body, including mechanisms
of action and physiological effects. Pharmacokinetics, on the other hand, describes
how the body absorbs, distributes, metabolizes, and excretes the drug. Understanding
pharmacodynamics helps nurses anticipate therapeutic and adverse effects.
Question 6:
The study of drug effects in humans is known as:
A. Pharmacology
B. Pharmacodynamics
C. Clinical pharmacology
D. Toxicokinetics
Correct Answer: C. Clinical pharmacology
Rationale:
Clinical pharmacology specifically examines how drugs affect humans, including
therapeutic outcomes and adverse reactions. It bridges basic pharmacology with
clinical practice. Pharmacology is broader, while pharmacodynamics and
pharmacokinetics are subfields within it.
Question 7:
Which statement by a nursing student indicates a need for further teaching?
A. Drugs can produce therapeutic and adverse effects
B. Drugs are used to diagnose and treat disease
C. Drugs are defined as illegal substances
D. Drug effects vary among individuals
Correct Answer: C. Drugs are defined as illegal substances
Rationale:
Drugs are not limited to illegal substances; they include any chemical used for
diagnosis, treatment, or prevention of disease. This misunderstanding reflects a
fundamental knowledge gap. The other statements are accurate and reflect correct
pharmacological understanding.
Question 8:
, 2026/2027
What is the nurse’s primary concern when administering medication?
A. Cost of therapy
B. Duration of action
C. Intensity of response
D. Drug classification
Correct Answer: C. Intensity of response
Rationale:
The intensity of a drug’s response determines both its therapeutic effectiveness and
risk for toxicity. Nurses must monitor how strongly a patient reacts to a medication to
ensure safety. Too little response means ineffective treatment, while excessive
response can lead to harm.
Question 9:
What is the primary objective of drug therapy?
A. Cure all diseases
B. Reduce healthcare costs
C. Provide maximum benefit with minimal harm
D. Eliminate symptoms only
Correct Answer: C. Provide maximum benefit with minimal harm
Rationale:
The goal of drug therapy is to achieve the desired therapeutic effect while minimizing
adverse effects. Complete cures are not always possible, and focusing only on
symptoms ignores underlying conditions. Safety and effectiveness must always be
balanced.
Question 10:
Which patient characteristics influence drug response? (Select all that apply)
A. Age
B. Gender
C. Weight
D. Genetics
Correct Answer: A, B, C, D
Rationale:
Drug response varies widely due to individual patient characteristics. Age affects
metabolism and organ function, gender influences hormonal and physiological
responses, weight impacts dosing, and genetics can alter drug metabolism and
receptor sensitivity. All listed factors are critical in personalizing drug therapy.
