Chamberlain NR 565 Midterm Exam – Advanced Pharmacology Actual Questions
and Answers (PDF).
NR 565 Midterm Exam Practice Questions
Section 1: Foundational Principles & Pharmacokinetics (Q1-20)
1. A nurse practitioner is prescribing a medication that undergoes extensive first-
pass metabolism. Which route of administration would most significantly reduce
this effect and increase the drug's bioavailability?
A) Oral
B) Sublingual
C) Rectal
D) Intravenous
Answer: B) Sublingual
Rationale: First-pass metabolism refers to the significant metabolism of a drug by
the liver immediately after oral absorption, before it reaches systemic circulation.
Sublingual administration allows the drug to be absorbed directly into the
systemic circulation via the highly vascularized oral mucosa, completely bypassing
the portal circulation and hepatic first-pass effect.
,2. A patient has a genetic variation that causes them to be a "rapid metabolizer"
of codeine. What is the primary safety concern when prescribing codeine for this
patient?
A) The medication will have no therapeutic effect.
B) The patient is at increased risk for toxicity from the parent drug.
C) The patient is at increased risk for toxicity from the active metabolite.
D) There is no significant concern, as codeine is a very weak opioid.
Answer: C) The patient is at increased risk for toxicity from the active metabolite.
Rationale: Codeine is a prodrug that requires metabolism by the CYP2D6 enzyme
to be converted into its active metabolite, morphine. A "rapid metabolizer" has an
increased number of functional CYP2D6 enzymes, leading to a faster and more
complete conversion of codeine to morphine. This can result in unexpectedly high
levels of morphine, leading to respiratory depression and other opioid toxicities.
3. A drug has a half-life of 4 hours. Approximately how long will it take for the
drug to reach steady-state plasma concentrations with regular, repeated dosing?
A) 8 hours
B) 12 hours
C) 20 hours
,D) 40 hours
Answer: C) 20 hours
Rationale: Steady-state is achieved after approximately 4 to 5 half-lives of drug
administration. With a half-life of 4 hours, 5 half-lives would be 20 hours (5 x 4
hours = 20 hours). At this point, drug elimination equals drug input, and plasma
levels remain relatively constant.
4. A patient with heart failure and decreased cardiac output is prescribed a
medication that is administered intramuscularly. How will this patient's condition
most likely affect the drug's absorption?
A) Absorption will be increased due to decreased peripheral blood flow.
B) Absorption will be decreased due to decreased peripheral blood flow.
C) Absorption will remain unchanged from a patient with normal cardiac output.
D) Absorption will be unpredictable, but generally faster due to compensatory
mechanisms.
Answer: B) Absorption will be decreased due to decreased peripheral blood flow.
, Rationale: Decreased cardiac output, as seen in heart failure, reduces blood flow
to peripheral tissues, including skeletal muscle (the site of IM injection). Adequate
blood flow is necessary for drug absorption from extravascular sites, as it creates
a concentration gradient and carries the drug away from the administration site.
Reduced blood flow will therefore slow the rate of absorption.
5. Which drug characteristic would most likely result in a large volume of
distribution (Vd), such as > 500 L?
A) Highly water-soluble
B) Highly lipophilic and extensively tissue-bound
C) Highly protein-bound
D) Rapidly metabolized by the liver
Answer: B) Highly lipophilic and extensively tissue-bound
Rationale: Volume of distribution (Vd) is a theoretical volume that reflects the
extent to which a drug distributes out of the plasma and into body tissues. A large
Vd means the drug is highly distributed into tissues (e.g., fat, muscle) and is not
confined to the plasma or intravascular space. Lipophilic drugs readily cross cell
membranes and accumulate in fatty tissues, resulting in a very large Vd.
and Answers (PDF).
NR 565 Midterm Exam Practice Questions
Section 1: Foundational Principles & Pharmacokinetics (Q1-20)
1. A nurse practitioner is prescribing a medication that undergoes extensive first-
pass metabolism. Which route of administration would most significantly reduce
this effect and increase the drug's bioavailability?
A) Oral
B) Sublingual
C) Rectal
D) Intravenous
Answer: B) Sublingual
Rationale: First-pass metabolism refers to the significant metabolism of a drug by
the liver immediately after oral absorption, before it reaches systemic circulation.
Sublingual administration allows the drug to be absorbed directly into the
systemic circulation via the highly vascularized oral mucosa, completely bypassing
the portal circulation and hepatic first-pass effect.
,2. A patient has a genetic variation that causes them to be a "rapid metabolizer"
of codeine. What is the primary safety concern when prescribing codeine for this
patient?
A) The medication will have no therapeutic effect.
B) The patient is at increased risk for toxicity from the parent drug.
C) The patient is at increased risk for toxicity from the active metabolite.
D) There is no significant concern, as codeine is a very weak opioid.
Answer: C) The patient is at increased risk for toxicity from the active metabolite.
Rationale: Codeine is a prodrug that requires metabolism by the CYP2D6 enzyme
to be converted into its active metabolite, morphine. A "rapid metabolizer" has an
increased number of functional CYP2D6 enzymes, leading to a faster and more
complete conversion of codeine to morphine. This can result in unexpectedly high
levels of morphine, leading to respiratory depression and other opioid toxicities.
3. A drug has a half-life of 4 hours. Approximately how long will it take for the
drug to reach steady-state plasma concentrations with regular, repeated dosing?
A) 8 hours
B) 12 hours
C) 20 hours
,D) 40 hours
Answer: C) 20 hours
Rationale: Steady-state is achieved after approximately 4 to 5 half-lives of drug
administration. With a half-life of 4 hours, 5 half-lives would be 20 hours (5 x 4
hours = 20 hours). At this point, drug elimination equals drug input, and plasma
levels remain relatively constant.
4. A patient with heart failure and decreased cardiac output is prescribed a
medication that is administered intramuscularly. How will this patient's condition
most likely affect the drug's absorption?
A) Absorption will be increased due to decreased peripheral blood flow.
B) Absorption will be decreased due to decreased peripheral blood flow.
C) Absorption will remain unchanged from a patient with normal cardiac output.
D) Absorption will be unpredictable, but generally faster due to compensatory
mechanisms.
Answer: B) Absorption will be decreased due to decreased peripheral blood flow.
, Rationale: Decreased cardiac output, as seen in heart failure, reduces blood flow
to peripheral tissues, including skeletal muscle (the site of IM injection). Adequate
blood flow is necessary for drug absorption from extravascular sites, as it creates
a concentration gradient and carries the drug away from the administration site.
Reduced blood flow will therefore slow the rate of absorption.
5. Which drug characteristic would most likely result in a large volume of
distribution (Vd), such as > 500 L?
A) Highly water-soluble
B) Highly lipophilic and extensively tissue-bound
C) Highly protein-bound
D) Rapidly metabolized by the liver
Answer: B) Highly lipophilic and extensively tissue-bound
Rationale: Volume of distribution (Vd) is a theoretical volume that reflects the
extent to which a drug distributes out of the plasma and into body tissues. A large
Vd means the drug is highly distributed into tissues (e.g., fat, muscle) and is not
confined to the plasma or intravascular space. Lipophilic drugs readily cross cell
membranes and accumulate in fatty tissues, resulting in a very large Vd.
