NR565 Week 4 Midterm Exam Review Advanced
Pharmacology Fundamentals 2026 | Chamberlain
University Examplify Online Proctored Exam | 100%
Pass Guaranteed | Graded A+
Section 1: Pharmacokinetics and Pharmacodynamics (Questions 1-40)
1. A patient with chronic kidney disease (eGFR 25 mL/min) is prescribed a
medication that is 80% renally excreted. What adjustment is most
appropriate?
A. Increase the dose by 50%
B. Decrease the dose or extend the dosing interval
C. No adjustment is needed
D. Administer the medication intravenously instead of orally
Answer: B. Decrease the dose or extend the dosing interval
Rationale: For medications primarily eliminated by the kidneys, dose
reduction or extended dosing intervals are necessary in patients with
reduced eGFR to prevent drug accumulation and toxicity. The degree
of adjustment depends on the eGFR and drug characteristics .
2. A patient is prescribed a drug that is a CYP3A4 inhibitor. Which
medication would the nurse expect to have increased levels when co-
administered?
A. Simvastatin (Zocor)
B. Acetaminophen (Tylenol)
C. Metformin (Glucophage)
D. Lisinopril (Prinivil)
Answer: A. Simvastatin (Zocor)
Rationale: Simvastatin is a substrate of CYP3A4. When co-
,administered with a CYP3A4 inhibitor, simvastatin levels increase,
raising the risk of myopathy and rhabdomyolysis. Many statins have
significant CYP3A4 interactions .
3. A patient taking warfarin (Coumadin) is started on amiodarone. What
effect does the nurse anticipate?
A. Decreased INR, increased warfarin metabolism
B. Increased INR, increased bleeding risk
C. No change in INR
D. Decreased warfarin absorption
Answer: B. Increased INR, increased bleeding risk
Rationale: Amiodarone inhibits CYP2C9 and CYP1A2, which
metabolize warfarin. This interaction leads to increased INR and
bleeding risk. Warfarin dose should be reduced by 30-50% when
amiodarone is initiated .
4. The nurse is educating a patient about the importance of medication
adherence. Which statement reflects the concept of pharmacotherapeutic
goals?
A. "You should take your medication only when you feel symptoms."
B. "The goal is to achieve maximum benefit with minimal harm."
C. "All medications have the same therapeutic window."
D. "Side effects are not important to report."
Answer: B. "The goal is to achieve maximum benefit with minimal
harm."
Rationale: The objective of drug therapy is to achieve maximum
therapeutic benefit while minimizing harm. Because no drug is ideal,
clinicians must balance efficacy with safety for each individual patient
.
5. A drug with a narrow therapeutic index requires:
A. Less frequent monitoring
B. Therapeutic drug monitoring to maintain levels within a narrow range
,C. Higher doses to achieve effect
D. No special monitoring
Answer: B. Therapeutic drug monitoring to maintain levels within a
narrow range
Rationale: Drugs with a narrow therapeutic index have a small margin
of safety between therapeutic and toxic doses. Therapeutic drug
monitoring is essential to maintain levels within the therapeutic
range and prevent toxicity. Examples include lithium, digoxin,
warfarin, and phenytoin .
6. Which factor would decrease the absorption of an orally administered
drug?
A. Increased blood flow to the gastrointestinal tract
B. Administration on an empty stomach
C. The presence of food that binds the drug
D. Administration of a liquid formulation
Answer: C. The presence of food that binds the drug
Rationale: Food can decrease drug absorption by binding to the drug,
delaying gastric emptying, or altering gastric pH. Increased blood
flow, empty stomach, and liquid formulations typically enhance
absorption .
7. A patient's serum albumin level is low. How will this affect the distribution
of a highly protein-bound drug?
A. Decreased free drug concentration
B. Increased free drug concentration
C. No change in drug distribution
D. Decreased volume of distribution
Answer: B. Increased free drug concentration
Rationale: Low albumin levels mean fewer binding sites for protein-
bound drugs. This results in a higher concentration of free,
pharmacologically active drug, increasing both therapeutic effects and
risk of toxicity .
, 8. The nurse explains to a patient that a loading dose is often used for certain
medications. What is the purpose of a loading dose?
A. To maintain therapeutic levels over a long period
B. To rapidly achieve therapeutic drug levels
C. To minimize side effects
D. To reduce the frequency of dosing
Answer: B. To rapidly achieve therapeutic drug levels
Rationale: A loading dose is a larger initial dose used to achieve
therapeutic levels quickly. Maintenance doses are then given to
sustain those levels. This is particularly important for drugs with long
half-lives .
9. A patient asks why they need to take a medication every 12 hours. The
nurse explains that the dosing interval is based on which pharmacokinetic
principle?
A. Rate of absorption
B. Volume of distribution
C. Half-life
D. Protein binding
Answer: C. Half-life
Rationale: Dosing intervals are determined by drug half-life. Drugs
with shorter half-lives require more frequent dosing to maintain
therapeutic levels. Typically, dosing intervals are based on 1-2 times
the half-life .
10. Which statement about drug metabolism is accurate?
A. Metabolism always results in inactivation of the drug
B. Metabolism primarily occurs in the kidneys
C. Metabolism can convert an inactive prodrug to an active form
D. Metabolism does not affect drug elimination
Answer: C. Metabolism can convert an inactive prodrug to an active form
Rationale: While many drugs are metabolized to inactive forms, some drugs
Pharmacology Fundamentals 2026 | Chamberlain
University Examplify Online Proctored Exam | 100%
Pass Guaranteed | Graded A+
Section 1: Pharmacokinetics and Pharmacodynamics (Questions 1-40)
1. A patient with chronic kidney disease (eGFR 25 mL/min) is prescribed a
medication that is 80% renally excreted. What adjustment is most
appropriate?
A. Increase the dose by 50%
B. Decrease the dose or extend the dosing interval
C. No adjustment is needed
D. Administer the medication intravenously instead of orally
Answer: B. Decrease the dose or extend the dosing interval
Rationale: For medications primarily eliminated by the kidneys, dose
reduction or extended dosing intervals are necessary in patients with
reduced eGFR to prevent drug accumulation and toxicity. The degree
of adjustment depends on the eGFR and drug characteristics .
2. A patient is prescribed a drug that is a CYP3A4 inhibitor. Which
medication would the nurse expect to have increased levels when co-
administered?
A. Simvastatin (Zocor)
B. Acetaminophen (Tylenol)
C. Metformin (Glucophage)
D. Lisinopril (Prinivil)
Answer: A. Simvastatin (Zocor)
Rationale: Simvastatin is a substrate of CYP3A4. When co-
,administered with a CYP3A4 inhibitor, simvastatin levels increase,
raising the risk of myopathy and rhabdomyolysis. Many statins have
significant CYP3A4 interactions .
3. A patient taking warfarin (Coumadin) is started on amiodarone. What
effect does the nurse anticipate?
A. Decreased INR, increased warfarin metabolism
B. Increased INR, increased bleeding risk
C. No change in INR
D. Decreased warfarin absorption
Answer: B. Increased INR, increased bleeding risk
Rationale: Amiodarone inhibits CYP2C9 and CYP1A2, which
metabolize warfarin. This interaction leads to increased INR and
bleeding risk. Warfarin dose should be reduced by 30-50% when
amiodarone is initiated .
4. The nurse is educating a patient about the importance of medication
adherence. Which statement reflects the concept of pharmacotherapeutic
goals?
A. "You should take your medication only when you feel symptoms."
B. "The goal is to achieve maximum benefit with minimal harm."
C. "All medications have the same therapeutic window."
D. "Side effects are not important to report."
Answer: B. "The goal is to achieve maximum benefit with minimal
harm."
Rationale: The objective of drug therapy is to achieve maximum
therapeutic benefit while minimizing harm. Because no drug is ideal,
clinicians must balance efficacy with safety for each individual patient
.
5. A drug with a narrow therapeutic index requires:
A. Less frequent monitoring
B. Therapeutic drug monitoring to maintain levels within a narrow range
,C. Higher doses to achieve effect
D. No special monitoring
Answer: B. Therapeutic drug monitoring to maintain levels within a
narrow range
Rationale: Drugs with a narrow therapeutic index have a small margin
of safety between therapeutic and toxic doses. Therapeutic drug
monitoring is essential to maintain levels within the therapeutic
range and prevent toxicity. Examples include lithium, digoxin,
warfarin, and phenytoin .
6. Which factor would decrease the absorption of an orally administered
drug?
A. Increased blood flow to the gastrointestinal tract
B. Administration on an empty stomach
C. The presence of food that binds the drug
D. Administration of a liquid formulation
Answer: C. The presence of food that binds the drug
Rationale: Food can decrease drug absorption by binding to the drug,
delaying gastric emptying, or altering gastric pH. Increased blood
flow, empty stomach, and liquid formulations typically enhance
absorption .
7. A patient's serum albumin level is low. How will this affect the distribution
of a highly protein-bound drug?
A. Decreased free drug concentration
B. Increased free drug concentration
C. No change in drug distribution
D. Decreased volume of distribution
Answer: B. Increased free drug concentration
Rationale: Low albumin levels mean fewer binding sites for protein-
bound drugs. This results in a higher concentration of free,
pharmacologically active drug, increasing both therapeutic effects and
risk of toxicity .
, 8. The nurse explains to a patient that a loading dose is often used for certain
medications. What is the purpose of a loading dose?
A. To maintain therapeutic levels over a long period
B. To rapidly achieve therapeutic drug levels
C. To minimize side effects
D. To reduce the frequency of dosing
Answer: B. To rapidly achieve therapeutic drug levels
Rationale: A loading dose is a larger initial dose used to achieve
therapeutic levels quickly. Maintenance doses are then given to
sustain those levels. This is particularly important for drugs with long
half-lives .
9. A patient asks why they need to take a medication every 12 hours. The
nurse explains that the dosing interval is based on which pharmacokinetic
principle?
A. Rate of absorption
B. Volume of distribution
C. Half-life
D. Protein binding
Answer: C. Half-life
Rationale: Dosing intervals are determined by drug half-life. Drugs
with shorter half-lives require more frequent dosing to maintain
therapeutic levels. Typically, dosing intervals are based on 1-2 times
the half-life .
10. Which statement about drug metabolism is accurate?
A. Metabolism always results in inactivation of the drug
B. Metabolism primarily occurs in the kidneys
C. Metabolism can convert an inactive prodrug to an active form
D. Metabolism does not affect drug elimination
Answer: C. Metabolism can convert an inactive prodrug to an active form
Rationale: While many drugs are metabolized to inactive forms, some drugs
