NR 341 Pharmacology Clinical Judgment Exam
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Detailed Rationales | Complete CJE Study Guide
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Section 1: Basic Principles of Pharmacology – Pharmacokinetics &
Pharmacodynamics (Questions 1–30)
1. A nurse is preparing to administer an oral medication. Which property of an ideal
drug is most important for ensuring that the drug produces the intended benefit?
A) Safety
B) Selectivity
C) Effectiveness
D) Reversibility
Correct Answer: C) Effectiveness
Rationale: Effectiveness is the most important property of a drug; if a drug is not effective,
there is no justification for giving it. Safety, selectivity, and reversibility are also important but
secondary to effectiveness.
2. A patient asks the nurse, "What does 'pharmacodynamics' mean?" Which
response is correct?
A) "The movement of drugs through the body."
B) "The effects of drugs on the body."
,C) "The study of poisons."
D) "The use of drugs to treat disease."
Correct Answer: B) The effects of drugs on the body.
Rationale: Pharmacodynamics is the study of the biochemical and physiologic effects of
drugs on the body (what the drug does to the body). Pharmacokinetics is the movement of
drugs through the body. Toxicology is the study of poisons. Therapeutics is the use of drugs
to treat disease.
3. A nurse is preparing to give an oral dose of Drug X to treat a patient's high blood
pressure. After giving the drug, the nurse finds that it not only reduces the blood
pressure without serious harmful effects, but it also causes the patient to have
nausea and headache. Based on this information, which property of an ideal drug is
this drug lacking?
A) Effectiveness
B) Safety
C) Selectivity
D) Ease of administration
Correct Answer: C) Selectivity
Rationale: The drug is effective in lowering blood pressure and safe in that it does not cause
serious harmful effects. However, it causes other effects besides the one desired; therefore,
it lacks selectivity. No drug is completely selective.
4. A drug has a half-life of 4 hours. After how many half-lives is the drug considered
to be effectively eliminated from the body?
A) 2 half-lives
B) 3 half-lives
,C) 4 half-lives
D) 5 half-lives
Correct Answer: D) 5 half-lives
Rationale: It takes approximately 4–5 half-lives for a drug to be effectively eliminated from
the body. After 5 half-lives, approximately 97% of the drug is eliminated.
5. A patient is receiving a medication that binds to a receptor and produces a
maximal response. This medication is considered a:
A) Partial agonist
B) Antagonist
C) Full agonist
D) Competitive inhibitor
Correct Answer: C) Full agonist
Rationale: A full agonist binds to a receptor and produces a maximal response. Partial
agonists produce a submaximal response even when all receptors are occupied.
Antagonists block receptor activation.
6. Which pharmacokinetic process refers to the movement of a drug from the site of
administration into the bloodstream?
A) Distribution
B) Metabolism
C) Excretion
D) Absorption
Correct Answer: D) Absorption
Rationale: Absorption is the movement of a drug from its site of administration into the
bloodstream. Distribution is the movement of drugs through the body to their sites of action.
, 7. A patient is receiving a drug that has a low therapeutic index. The nurse
understands that this drug:
A) Has a wide margin of safety
B) Requires therapeutic drug monitoring
C) Is less likely to cause adverse effects
D) Can be administered without caution
Correct Answer: B) Requires therapeutic drug monitoring
Rationale: Drugs with a low therapeutic index have a narrow margin between therapeutic
and toxic doses. They require close monitoring of serum drug levels to ensure safety and
efficacy.
8. A nurse is reviewing the medication administration record for a client with renal
failure. Which medication requires a dosage adjustment?
A) Ceftriaxone
B) Metformin
C) Acetaminophen
D) Lisinopril
Correct Answer: B) Metformin
Rationale: Metformin is excreted unchanged by the kidneys and can accumulate in renal
failure, increasing the risk of lactic acidosis. Dosage adjustment or discontinuation is
required. The other medications may also require monitoring, but metformin is a classic
example.
9. A client is prescribed a medication that is highly protein-bound. The client's serum
albumin level is low. What effect should the nurse anticipate?
A) Decreased therapeutic effect
B) Increased risk of toxicity
2026 Latest: 200 Real Questions & Answers with
Detailed Rationales | Complete CJE Study Guide
(Chamberlain) | Guaranteed Pass
Section 1: Basic Principles of Pharmacology – Pharmacokinetics &
Pharmacodynamics (Questions 1–30)
1. A nurse is preparing to administer an oral medication. Which property of an ideal
drug is most important for ensuring that the drug produces the intended benefit?
A) Safety
B) Selectivity
C) Effectiveness
D) Reversibility
Correct Answer: C) Effectiveness
Rationale: Effectiveness is the most important property of a drug; if a drug is not effective,
there is no justification for giving it. Safety, selectivity, and reversibility are also important but
secondary to effectiveness.
2. A patient asks the nurse, "What does 'pharmacodynamics' mean?" Which
response is correct?
A) "The movement of drugs through the body."
B) "The effects of drugs on the body."
,C) "The study of poisons."
D) "The use of drugs to treat disease."
Correct Answer: B) The effects of drugs on the body.
Rationale: Pharmacodynamics is the study of the biochemical and physiologic effects of
drugs on the body (what the drug does to the body). Pharmacokinetics is the movement of
drugs through the body. Toxicology is the study of poisons. Therapeutics is the use of drugs
to treat disease.
3. A nurse is preparing to give an oral dose of Drug X to treat a patient's high blood
pressure. After giving the drug, the nurse finds that it not only reduces the blood
pressure without serious harmful effects, but it also causes the patient to have
nausea and headache. Based on this information, which property of an ideal drug is
this drug lacking?
A) Effectiveness
B) Safety
C) Selectivity
D) Ease of administration
Correct Answer: C) Selectivity
Rationale: The drug is effective in lowering blood pressure and safe in that it does not cause
serious harmful effects. However, it causes other effects besides the one desired; therefore,
it lacks selectivity. No drug is completely selective.
4. A drug has a half-life of 4 hours. After how many half-lives is the drug considered
to be effectively eliminated from the body?
A) 2 half-lives
B) 3 half-lives
,C) 4 half-lives
D) 5 half-lives
Correct Answer: D) 5 half-lives
Rationale: It takes approximately 4–5 half-lives for a drug to be effectively eliminated from
the body. After 5 half-lives, approximately 97% of the drug is eliminated.
5. A patient is receiving a medication that binds to a receptor and produces a
maximal response. This medication is considered a:
A) Partial agonist
B) Antagonist
C) Full agonist
D) Competitive inhibitor
Correct Answer: C) Full agonist
Rationale: A full agonist binds to a receptor and produces a maximal response. Partial
agonists produce a submaximal response even when all receptors are occupied.
Antagonists block receptor activation.
6. Which pharmacokinetic process refers to the movement of a drug from the site of
administration into the bloodstream?
A) Distribution
B) Metabolism
C) Excretion
D) Absorption
Correct Answer: D) Absorption
Rationale: Absorption is the movement of a drug from its site of administration into the
bloodstream. Distribution is the movement of drugs through the body to their sites of action.
, 7. A patient is receiving a drug that has a low therapeutic index. The nurse
understands that this drug:
A) Has a wide margin of safety
B) Requires therapeutic drug monitoring
C) Is less likely to cause adverse effects
D) Can be administered without caution
Correct Answer: B) Requires therapeutic drug monitoring
Rationale: Drugs with a low therapeutic index have a narrow margin between therapeutic
and toxic doses. They require close monitoring of serum drug levels to ensure safety and
efficacy.
8. A nurse is reviewing the medication administration record for a client with renal
failure. Which medication requires a dosage adjustment?
A) Ceftriaxone
B) Metformin
C) Acetaminophen
D) Lisinopril
Correct Answer: B) Metformin
Rationale: Metformin is excreted unchanged by the kidneys and can accumulate in renal
failure, increasing the risk of lactic acidosis. Dosage adjustment or discontinuation is
required. The other medications may also require monitoring, but metformin is a classic
example.
9. A client is prescribed a medication that is highly protein-bound. The client's serum
albumin level is low. What effect should the nurse anticipate?
A) Decreased therapeutic effect
B) Increased risk of toxicity
