Introduction to Pharmacology Comprehensive Exam (NSG 318) 2026 –
GCU
1. A patient is prescribed an oral medication that has a high ‘first-pass’ effect.
Which statement best describes this process?
A. The drug is primarily excreted by the kidneys before reaching the heart.
B. The drug is metabolized by the liver before it reaches the systemic circulation.
C. The drug is absorbed directly through the gastric mucosa into the bloodstream.
D. The drug bypasses the liver and goes straight to the target organ.
Answer: B
Rationale: The first-pass effect occurs when a drug is absorbed from the GI tract and
passes through the liver via the portal vein, where it is partially metabolized before
reaching the rest of the body.
2. The nurse is monitoring a patient’s drug levels. What is the definition of a
drug’s half-life?
A. The time it takes for the drug to reach its maximum therapeutic effect.
B. The amount of time required for the body’s drug concentration to decrease by 50%.
C. The interval between the first dose and the onset of action.
D. The duration of time the drug remains at a toxic level in the blood.
Answer: B
Rationale: Half-life is the time required for the concentration of a drug in the body to be
reduced by one-half.
,3. Which pharmacokinetic phase is most affected by a patient with chronic renal
failure?
A. Excretion
B. Distribution
C. Metabolism
D. Absorption
Answer: A
Rationale: Excretion is the primary role of the kidneys; renal failure significantly impairs
the body’s ability to eliminate drugs.
4. A drug that binds to a receptor and produces a maximum biological response
is known as:
A. An agonist
B. A partial agonist
C. An antagonist
D. A competitive inhibitor
Answer: A
Rationale: An agonist is a drug that binds to a receptor and activates it to produce a
physiological response.
5. The nurse notices that a drug has a ‘narrow therapeutic index’. What does
this imply?
A. The drug is very safe and does not require blood monitoring.
B. The drug has a very long half-life.
C. The drug must be taken with food to ensure absorption.
D. There is a small margin between the effective dose and the toxic dose.
Answer: D
Rationale: A narrow therapeutic index means that the difference between a therapeutic
dose and a toxic dose is small, requiring close monitoring.
, 6. What is the primary site for drug metabolism in the human body?
A. Liver
B. Lungs
C. Kidneys
D. Small Intestine
Answer: A
Rationale: The liver is the primary organ responsible for the metabolism of drugs via
hepatic enzymes.
7. A patient is taking a drug that is highly protein-bound. What happens if the
patient’s albumin levels drop?
A. The drug becomes less effective.
B. The drug cannot cross the blood-brain barrier.
C. The drug is excreted faster.
D. The risk for drug toxicity increases.
Answer: D
Rationale: When albumin levels are low, there are fewer binding sites, leading to more
‘free’ (active) drug in the blood, increasing the risk of toxicity.
8. Which of the following describes an ‘idiosyncratic reaction’ to a medication?
A. A predictable side effect listed in the drug handbook.
B. A life-threatening allergic reaction involving airway compromise.
C. An unexpected and individual-specific response to a drug.
D. A reaction caused by taking an overdose of the medication.
Answer: C
Rationale: An idiosyncratic reaction is an uncommon, unexpected response to a drug that
is unique to the individual and not related to the drug’s mechanism.
GCU
1. A patient is prescribed an oral medication that has a high ‘first-pass’ effect.
Which statement best describes this process?
A. The drug is primarily excreted by the kidneys before reaching the heart.
B. The drug is metabolized by the liver before it reaches the systemic circulation.
C. The drug is absorbed directly through the gastric mucosa into the bloodstream.
D. The drug bypasses the liver and goes straight to the target organ.
Answer: B
Rationale: The first-pass effect occurs when a drug is absorbed from the GI tract and
passes through the liver via the portal vein, where it is partially metabolized before
reaching the rest of the body.
2. The nurse is monitoring a patient’s drug levels. What is the definition of a
drug’s half-life?
A. The time it takes for the drug to reach its maximum therapeutic effect.
B. The amount of time required for the body’s drug concentration to decrease by 50%.
C. The interval between the first dose and the onset of action.
D. The duration of time the drug remains at a toxic level in the blood.
Answer: B
Rationale: Half-life is the time required for the concentration of a drug in the body to be
reduced by one-half.
,3. Which pharmacokinetic phase is most affected by a patient with chronic renal
failure?
A. Excretion
B. Distribution
C. Metabolism
D. Absorption
Answer: A
Rationale: Excretion is the primary role of the kidneys; renal failure significantly impairs
the body’s ability to eliminate drugs.
4. A drug that binds to a receptor and produces a maximum biological response
is known as:
A. An agonist
B. A partial agonist
C. An antagonist
D. A competitive inhibitor
Answer: A
Rationale: An agonist is a drug that binds to a receptor and activates it to produce a
physiological response.
5. The nurse notices that a drug has a ‘narrow therapeutic index’. What does
this imply?
A. The drug is very safe and does not require blood monitoring.
B. The drug has a very long half-life.
C. The drug must be taken with food to ensure absorption.
D. There is a small margin between the effective dose and the toxic dose.
Answer: D
Rationale: A narrow therapeutic index means that the difference between a therapeutic
dose and a toxic dose is small, requiring close monitoring.
, 6. What is the primary site for drug metabolism in the human body?
A. Liver
B. Lungs
C. Kidneys
D. Small Intestine
Answer: A
Rationale: The liver is the primary organ responsible for the metabolism of drugs via
hepatic enzymes.
7. A patient is taking a drug that is highly protein-bound. What happens if the
patient’s albumin levels drop?
A. The drug becomes less effective.
B. The drug cannot cross the blood-brain barrier.
C. The drug is excreted faster.
D. The risk for drug toxicity increases.
Answer: D
Rationale: When albumin levels are low, there are fewer binding sites, leading to more
‘free’ (active) drug in the blood, increasing the risk of toxicity.
8. Which of the following describes an ‘idiosyncratic reaction’ to a medication?
A. A predictable side effect listed in the drug handbook.
B. A life-threatening allergic reaction involving airway compromise.
C. An unexpected and individual-specific response to a drug.
D. A reaction caused by taking an overdose of the medication.
Answer: C
Rationale: An idiosyncratic reaction is an uncommon, unexpected response to a drug that
is unique to the individual and not related to the drug’s mechanism.
