, NURS 1150: NURSE PHARMACOLOGY I
EXAM 1 – COMPREHENSIVE EXAMINATION
50 Multiple-Choice Questions with Rationales & Answer Key
Question 1: A nurse is administering a medication that has a high first-pass effect. Which of
the following routes of administration is most affected by this phenomenon?
A) Intravenous (IV)
B) Sublingual
C) Oral (PO)
D) Transdermal
Correct Answer: C
Rationale: Oral medications are absorbed from the GI tract and pass through the portal venous
system to the liver, where a significant portion of the drug may be metabolized before reaching
systemic circulation (first-pass effect). IV, sublingual, and transdermal routes bypass portal
circulation.
Question 2: The nurse understands that pharmacodynamics involves which of the following
core processes?
A) How the body metabolizes and excretes a drug
B) What the drug does to the body and its mechanism of action
C) The rate of drug absorption across mucosal membranes
D) Plasma protein binding and volume of distribution
Correct Answer: B
Rationale: Pharmacodynamics is the study of the biochemical and physiological effects of drugs
on the body and their mechanisms of action. Pharmacokinetics refers to how the body handles the
drug (absorption, distribution, metabolism, excretion).
Question 3: A patient with severe renal impairment is prescribed a medication primarily
excreted by the kidneys. What adjustment does the nurse anticipate?
A) Increasing the drug dosage to overcome renal resistance
B) Decreasing the dosage or extending the dosing interval
, C) Switching the route from oral to intravenous
D) Administering a loading dose followed by standard maintenance doses
Correct Answer: B
Rationale: Patients with impaired renal function cannot excrete drugs efficiently, leading to drug
accumulation and toxicity. Dosages must be reduced, or dosing intervals prolonged, based on
creatinine clearance and GFR.
Question 4: Which term describes the time required for the amount of drug in the body to
decrease by 50%?
A) Onset of action
B) Therapeutic index
C) Half-life
D) Bioavailability
Correct Answer: C
Rationale: Half-life ($t_{1/2}$) is the time required for the concentration of a drug in the body to
decline by 50%. It determines dosing frequency and how long a drug takes to reach steady-state
(typically 4 to 5 half-lives).
Question 5: A drug with a narrow therapeutic index requires which of the following nursing
interventions?
A) Routine monitoring of peak and trough serum drug levels
B) Doubling the dose if the patient misses a scheduled time
C) Administering the medication exclusively with grapefruit juice
D) Discontinuing baseline renal and hepatic lab tests
Correct Answer: A
Rationale: Drugs with a narrow therapeutic index (e.g., digoxin, warfarin, lithium) have a very
small margin of safety between therapeutic and toxic concentrations, requiring frequent serum
level monitoring.
Question 6: A patient asks why they are receiving a loading dose for a newly prescribed anti-
arrhythmic medication. How should the nurse respond?
A) 'It helps the drug reach therapeutic plateau levels much faster than regular dosing.'
B) 'It completely bypasses liver metabolism to prevent toxicity.'
C) 'It is used exclusively to test the patient for severe allergic reactions.'
EXAM 1 – COMPREHENSIVE EXAMINATION
50 Multiple-Choice Questions with Rationales & Answer Key
Question 1: A nurse is administering a medication that has a high first-pass effect. Which of
the following routes of administration is most affected by this phenomenon?
A) Intravenous (IV)
B) Sublingual
C) Oral (PO)
D) Transdermal
Correct Answer: C
Rationale: Oral medications are absorbed from the GI tract and pass through the portal venous
system to the liver, where a significant portion of the drug may be metabolized before reaching
systemic circulation (first-pass effect). IV, sublingual, and transdermal routes bypass portal
circulation.
Question 2: The nurse understands that pharmacodynamics involves which of the following
core processes?
A) How the body metabolizes and excretes a drug
B) What the drug does to the body and its mechanism of action
C) The rate of drug absorption across mucosal membranes
D) Plasma protein binding and volume of distribution
Correct Answer: B
Rationale: Pharmacodynamics is the study of the biochemical and physiological effects of drugs
on the body and their mechanisms of action. Pharmacokinetics refers to how the body handles the
drug (absorption, distribution, metabolism, excretion).
Question 3: A patient with severe renal impairment is prescribed a medication primarily
excreted by the kidneys. What adjustment does the nurse anticipate?
A) Increasing the drug dosage to overcome renal resistance
B) Decreasing the dosage or extending the dosing interval
, C) Switching the route from oral to intravenous
D) Administering a loading dose followed by standard maintenance doses
Correct Answer: B
Rationale: Patients with impaired renal function cannot excrete drugs efficiently, leading to drug
accumulation and toxicity. Dosages must be reduced, or dosing intervals prolonged, based on
creatinine clearance and GFR.
Question 4: Which term describes the time required for the amount of drug in the body to
decrease by 50%?
A) Onset of action
B) Therapeutic index
C) Half-life
D) Bioavailability
Correct Answer: C
Rationale: Half-life ($t_{1/2}$) is the time required for the concentration of a drug in the body to
decline by 50%. It determines dosing frequency and how long a drug takes to reach steady-state
(typically 4 to 5 half-lives).
Question 5: A drug with a narrow therapeutic index requires which of the following nursing
interventions?
A) Routine monitoring of peak and trough serum drug levels
B) Doubling the dose if the patient misses a scheduled time
C) Administering the medication exclusively with grapefruit juice
D) Discontinuing baseline renal and hepatic lab tests
Correct Answer: A
Rationale: Drugs with a narrow therapeutic index (e.g., digoxin, warfarin, lithium) have a very
small margin of safety between therapeutic and toxic concentrations, requiring frequent serum
level monitoring.
Question 6: A patient asks why they are receiving a loading dose for a newly prescribed anti-
arrhythmic medication. How should the nurse respond?
A) 'It helps the drug reach therapeutic plateau levels much faster than regular dosing.'
B) 'It completely bypasses liver metabolism to prevent toxicity.'
C) 'It is used exclusively to test the patient for severe allergic reactions.'
