NU 578 PHARMACOLOGY FOR ADVANCED PRACTICE
NURSES: UNITS 1-5 COMPLETE EXAM QUESTION BANK
(UNIVERSITY OF SOUTH ALABAMA 2026-2027)
1. A patient is prescribed a medication that is highly protein-bound.
The nurse practitioner should monitor for increased drug effects if the
patient also takes which type of medication?
A. A medication that is highly lipophilic
B. A medication that is highly protein-bound
C. A medication that is renally excreted
D. A medication that is a CYP450 inducer
Correct Answer: B. Rationale: When two highly protein-bound drugs
are administered together, they compete for binding sites on plasma
proteins. This displacement increases the free (unbound) fraction of
the drug, leading to increased pharmacological effects and potential
toxicity.
2. A nurse practitioner is calculating a loading dose for a patient.
Which pharmacokinetic parameter is most essential to determine the
correct loading dose?
A. Clearance
B. Half-life
C. Volume of distribution
D. Bioavailability
Correct Answer: C. Rationale: The loading dose is calculated based on
the volume of distribution (Vd) and the target plasma concentration. It
,is used to rapidly achieve therapeutic levels. Maintenance dosing, on
the other hand, relies on clearance and bioavailability.
3. Which statement accurately describes the concept of a drug's
therapeutic index (TI)?
A. A high TI indicates a narrow margin of safety.
B. A low TI indicates the drug is safe and requires no monitoring.
C. A high TI indicates a wide margin of safety.
D. The TI is calculated by dividing the median toxic dose by the median
effective dose.
Correct Answer: C. Rationale: The therapeutic index is the ratio of the
toxic dose to the effective dose. A high TI means the toxic dose is
much higher than the effective dose, indicating a wide margin of
safety. A low TI (e.g., warfarin, digoxin, lithium) requires careful
monitoring.
4. A patient taking warfarin is prescribed a new medication. The nurse
practitioner notes that the new drug is a potent inhibitor of CYP2C9.
What effect will this have on the patient's INR?
A. The INR will decrease.
B. The INR will increase.
C. The INR will remain unchanged.
D. The INR will fluctuate unpredictably.
Correct Answer: B. Rationale: Warfarin is metabolized by CYP2C9.
Inhibiting this enzyme decreases the metabolism of warfarin, leading
to increased warfarin serum levels, enhanced anticoagulant effects,
and an elevated INR, increasing the risk of bleeding.
5. Which route of administration bypasses the first-pass effect
entirely?
,A. Oral
B. Rectal
C. Intravenous
D. Sublingual
Correct Answer: C. Rationale: Intravenous administration delivers the
drug directly into the systemic circulation, completely bypassing the
gastrointestinal tract and the hepatic first-pass metabolism. Sublingual
and rectal partially bypass it, but IV completely avoids it.
6. A patient asks why they must take an antibiotic every 8 hours. The
nurse practitioner explains this is based on which pharmacokinetic
property?
A. Volume of distribution
B. Half-life
C. Protein binding
D. Therapeutic index
Correct Answer: B. Rationale: The half-life of a drug determines the
time required for the plasma concentration to decrease by 50%.
Dosing intervals are typically scheduled to maintain therapeutic levels,
often corresponding to the drug's half-life (usually every 3-5 half-lives
to reach steady state).
7. Which phase of metabolism involves conjugation reactions, such as
glucuronidation, making drugs more water-soluble for excretion?
A. Phase I
B. Phase II
C. Phase III
D. Phase IV
Correct Answer: B. Rationale: Phase II metabolism involves
conjugation reactions (e.g., glucuronidation, sulfation) that attach
, polar groups to drugs or their Phase I metabolites, increasing their
water solubility and facilitating renal or biliary excretion.
8. A patient with severe liver disease is prescribed a medication that
undergoes extensive hepatic metabolism. The nurse practitioner
should anticipate:
A. An increased dose is required to achieve therapeutic effect.
B. The drug will have a prolonged half-life and increased risk of toxicity.
C. The drug will be excreted more rapidly by the kidneys.
D. The drug will bypass the liver and have no effect.
Correct Answer: B. Rationale: Hepatic impairment reduces the liver's
capacity to metabolize drugs. This leads to decreased clearance, a
prolonged half-life, and accumulation of the drug in the body,
significantly increasing the risk of adverse effects and toxicity.
9. Which of the following is considered a high-alert medication
according to the Institute for Safe Medication Practices (ISMP)?
A. Acetaminophen
B. Insulin
C. Amoxicillin
D. Loratadine
Correct Answer: B. Rationale: Insulin is classified as a high-alert
medication by the ISMP because errors in its dosing or administration
can cause severe patient harm (e.g., severe hypoglycemia or
hyperglycemia). Other high-alert classes include anticoagulants,
opioids, and chemotherapeutic agents.
10. A 78-year-old patient is experiencing confusion and falls. The nurse
practitioner reviews their medication list. According to the Beers
Criteria, which class of medications is most likely contributing to these
NURSES: UNITS 1-5 COMPLETE EXAM QUESTION BANK
(UNIVERSITY OF SOUTH ALABAMA 2026-2027)
1. A patient is prescribed a medication that is highly protein-bound.
The nurse practitioner should monitor for increased drug effects if the
patient also takes which type of medication?
A. A medication that is highly lipophilic
B. A medication that is highly protein-bound
C. A medication that is renally excreted
D. A medication that is a CYP450 inducer
Correct Answer: B. Rationale: When two highly protein-bound drugs
are administered together, they compete for binding sites on plasma
proteins. This displacement increases the free (unbound) fraction of
the drug, leading to increased pharmacological effects and potential
toxicity.
2. A nurse practitioner is calculating a loading dose for a patient.
Which pharmacokinetic parameter is most essential to determine the
correct loading dose?
A. Clearance
B. Half-life
C. Volume of distribution
D. Bioavailability
Correct Answer: C. Rationale: The loading dose is calculated based on
the volume of distribution (Vd) and the target plasma concentration. It
,is used to rapidly achieve therapeutic levels. Maintenance dosing, on
the other hand, relies on clearance and bioavailability.
3. Which statement accurately describes the concept of a drug's
therapeutic index (TI)?
A. A high TI indicates a narrow margin of safety.
B. A low TI indicates the drug is safe and requires no monitoring.
C. A high TI indicates a wide margin of safety.
D. The TI is calculated by dividing the median toxic dose by the median
effective dose.
Correct Answer: C. Rationale: The therapeutic index is the ratio of the
toxic dose to the effective dose. A high TI means the toxic dose is
much higher than the effective dose, indicating a wide margin of
safety. A low TI (e.g., warfarin, digoxin, lithium) requires careful
monitoring.
4. A patient taking warfarin is prescribed a new medication. The nurse
practitioner notes that the new drug is a potent inhibitor of CYP2C9.
What effect will this have on the patient's INR?
A. The INR will decrease.
B. The INR will increase.
C. The INR will remain unchanged.
D. The INR will fluctuate unpredictably.
Correct Answer: B. Rationale: Warfarin is metabolized by CYP2C9.
Inhibiting this enzyme decreases the metabolism of warfarin, leading
to increased warfarin serum levels, enhanced anticoagulant effects,
and an elevated INR, increasing the risk of bleeding.
5. Which route of administration bypasses the first-pass effect
entirely?
,A. Oral
B. Rectal
C. Intravenous
D. Sublingual
Correct Answer: C. Rationale: Intravenous administration delivers the
drug directly into the systemic circulation, completely bypassing the
gastrointestinal tract and the hepatic first-pass metabolism. Sublingual
and rectal partially bypass it, but IV completely avoids it.
6. A patient asks why they must take an antibiotic every 8 hours. The
nurse practitioner explains this is based on which pharmacokinetic
property?
A. Volume of distribution
B. Half-life
C. Protein binding
D. Therapeutic index
Correct Answer: B. Rationale: The half-life of a drug determines the
time required for the plasma concentration to decrease by 50%.
Dosing intervals are typically scheduled to maintain therapeutic levels,
often corresponding to the drug's half-life (usually every 3-5 half-lives
to reach steady state).
7. Which phase of metabolism involves conjugation reactions, such as
glucuronidation, making drugs more water-soluble for excretion?
A. Phase I
B. Phase II
C. Phase III
D. Phase IV
Correct Answer: B. Rationale: Phase II metabolism involves
conjugation reactions (e.g., glucuronidation, sulfation) that attach
, polar groups to drugs or their Phase I metabolites, increasing their
water solubility and facilitating renal or biliary excretion.
8. A patient with severe liver disease is prescribed a medication that
undergoes extensive hepatic metabolism. The nurse practitioner
should anticipate:
A. An increased dose is required to achieve therapeutic effect.
B. The drug will have a prolonged half-life and increased risk of toxicity.
C. The drug will be excreted more rapidly by the kidneys.
D. The drug will bypass the liver and have no effect.
Correct Answer: B. Rationale: Hepatic impairment reduces the liver's
capacity to metabolize drugs. This leads to decreased clearance, a
prolonged half-life, and accumulation of the drug in the body,
significantly increasing the risk of adverse effects and toxicity.
9. Which of the following is considered a high-alert medication
according to the Institute for Safe Medication Practices (ISMP)?
A. Acetaminophen
B. Insulin
C. Amoxicillin
D. Loratadine
Correct Answer: B. Rationale: Insulin is classified as a high-alert
medication by the ISMP because errors in its dosing or administration
can cause severe patient harm (e.g., severe hypoglycemia or
hyperglycemia). Other high-alert classes include anticoagulants,
opioids, and chemotherapeutic agents.
10. A 78-year-old patient is experiencing confusion and falls. The nurse
practitioner reviews their medication list. According to the Beers
Criteria, which class of medications is most likely contributing to these
