NUR-641E AdvANcEd PAthoPhysiology ANd
PhARmAcology – 2026/2027 AcAdEmic yEAR –
comPREhENsivE midtERm
SECTION 1: PHARMACOKINETICS AND PHARMACODYNAMICS
Question 1
What does pharmacokinetics involve?
• A) The study of drug-receptor interactions and mechanisms of action
• B) The process of ADME (absorption, distribution, metabolism, and elimination)
• C) The study of drug toxicity and adverse effects
• D) The process of drug manufacturing and formulation
ANswER: B – The process of ADME (absorption, distribution, metabolism, and elimination)
RAtioNAlE: Pharmacokinetics is what the body does to the drug,
involving Absorption (administration site to blood/plasma), Distribution (bloodstream to
interstitial/intracellular fluid), Metabolism (biotransformation via hepatic metabolism or other
tissues), and Elimination (drug and metabolites removed from the body). Pharmacodynamics
(A) is what the drug does to the body.
Question 2
Which route of administration has the highest bioavailability?
• A) Oral
• B) Intramuscular
• C) Intravenous
• D) Sublingual
ANswER: C – Intravenous
RAtioNAlE: The intravenous route has the highest bioavailability because the entire dose is
placed directly into the venous system, bypassing absorption and first-pass metabolism in the
liver. Oral administration is subject to first-pass metabolism and variable absorption.
,Question 3
What is the half-life of a drug?
• A) The time it takes for the drug to reach its maximum concentration
• B) The time it takes for half the drug to be excreted from the body
• C) The time it takes for the drug to be completely eliminated
• D) The time it takes for the drug to bind to its receptor
ANswER: B – The time it takes for half the drug to be excreted from the body
RAtioNAlE: The half-life of a drug is defined as how long it takes for half the drug to be
excreted from the body. Half-life determines how frequently the drug must be administered and
predicts how long toxic effects can last. Half-life is constant with first-order pharmacokinetics of
a drug.
Question 4
Steady state (SS) is usually reached within:
• A) 1-2 half-lives
• B) 2-3 half-lives
• C) 4-5 half-lives
• D) 6-7 half-lives
ANswER: C – 4-5 half-lives
RAtioNAlE: Steady-state concentration is reached after approximately 4-5 half-lives of a drug.
At this point, the rate of drug administration equals the rate of elimination, and plasma
concentrations remain relatively constant with each dose.
Question 5
What is the therapeutic index of a drug?
• A) The ratio of the therapeutic dose to the toxic dose
• B) The ratio of the toxic dose to the therapeutic dose (TD50/ED50)
• C) The maximum safe dose of a drug
• D) The minimum effective dose of a drug
ANswER: B – The ratio of the toxic dose to the therapeutic dose (TD50/ED50)
, RAtioNAlE: The therapeutic index (TI) is the ratio of the toxic dose to the therapeutic dose
(TD50/ED50). A narrow therapeutic index means the difference between the therapeutic and
toxic doses is small, requiring careful monitoring (e.g., digoxin, warfarin, lithium, phenytoin).
Question 6
A patient is prescribed a medication that is classified as a prodrug. Which statement by
the patient indicates understanding of this medication type?
• A) "The medication is active immediately upon administration."
• B) "The medication must be metabolized in the body to become active."
• C) "The medication works only on the liver."
• D) "The medication should be taken with food to increase absorption."
ANswER: B – "The medication must be metabolized in the body to become active."
RAtioNAlE: A prodrug is a biologically inactive compound that must be metabolized in the body
to produce the active drug. Prednisone is an example of a prodrug that is converted to
prednisolone, the active anti-inflammatory form. Prodrugs are not active immediately and are
metabolized in various tissues, not exclusively the liver.
Question 7
A graduate nursing student is reviewing the process of drug movement through the
body. Which statement accurately describes the relationship between drug half-life and
steady-state concentration?
• A) Steady state is achieved after one half-life of regular dosing
• B) Steady state is typically reached within 4 to 5 half-lives of drug administration
• C) Steady state is independent of the drug's half-life
• D) Steady state occurs only after 24 hours of continuous infusion
ANswER: B – Steady state is typically reached within 4 to 5 half-lives of drug
administration
RAtioNAlE: Steady-state concentration is usually achieved after 4 to 5 half-lives of a drug,
assuming regular dosing intervals. At this point, the rate of drug administration equals the rate of
elimination. One half-life only achieves 50% of steady state.
Question 8
A patient is receiving a drug with a narrow therapeutic index. What is the clinical
implication of this?
PhARmAcology – 2026/2027 AcAdEmic yEAR –
comPREhENsivE midtERm
SECTION 1: PHARMACOKINETICS AND PHARMACODYNAMICS
Question 1
What does pharmacokinetics involve?
• A) The study of drug-receptor interactions and mechanisms of action
• B) The process of ADME (absorption, distribution, metabolism, and elimination)
• C) The study of drug toxicity and adverse effects
• D) The process of drug manufacturing and formulation
ANswER: B – The process of ADME (absorption, distribution, metabolism, and elimination)
RAtioNAlE: Pharmacokinetics is what the body does to the drug,
involving Absorption (administration site to blood/plasma), Distribution (bloodstream to
interstitial/intracellular fluid), Metabolism (biotransformation via hepatic metabolism or other
tissues), and Elimination (drug and metabolites removed from the body). Pharmacodynamics
(A) is what the drug does to the body.
Question 2
Which route of administration has the highest bioavailability?
• A) Oral
• B) Intramuscular
• C) Intravenous
• D) Sublingual
ANswER: C – Intravenous
RAtioNAlE: The intravenous route has the highest bioavailability because the entire dose is
placed directly into the venous system, bypassing absorption and first-pass metabolism in the
liver. Oral administration is subject to first-pass metabolism and variable absorption.
,Question 3
What is the half-life of a drug?
• A) The time it takes for the drug to reach its maximum concentration
• B) The time it takes for half the drug to be excreted from the body
• C) The time it takes for the drug to be completely eliminated
• D) The time it takes for the drug to bind to its receptor
ANswER: B – The time it takes for half the drug to be excreted from the body
RAtioNAlE: The half-life of a drug is defined as how long it takes for half the drug to be
excreted from the body. Half-life determines how frequently the drug must be administered and
predicts how long toxic effects can last. Half-life is constant with first-order pharmacokinetics of
a drug.
Question 4
Steady state (SS) is usually reached within:
• A) 1-2 half-lives
• B) 2-3 half-lives
• C) 4-5 half-lives
• D) 6-7 half-lives
ANswER: C – 4-5 half-lives
RAtioNAlE: Steady-state concentration is reached after approximately 4-5 half-lives of a drug.
At this point, the rate of drug administration equals the rate of elimination, and plasma
concentrations remain relatively constant with each dose.
Question 5
What is the therapeutic index of a drug?
• A) The ratio of the therapeutic dose to the toxic dose
• B) The ratio of the toxic dose to the therapeutic dose (TD50/ED50)
• C) The maximum safe dose of a drug
• D) The minimum effective dose of a drug
ANswER: B – The ratio of the toxic dose to the therapeutic dose (TD50/ED50)
, RAtioNAlE: The therapeutic index (TI) is the ratio of the toxic dose to the therapeutic dose
(TD50/ED50). A narrow therapeutic index means the difference between the therapeutic and
toxic doses is small, requiring careful monitoring (e.g., digoxin, warfarin, lithium, phenytoin).
Question 6
A patient is prescribed a medication that is classified as a prodrug. Which statement by
the patient indicates understanding of this medication type?
• A) "The medication is active immediately upon administration."
• B) "The medication must be metabolized in the body to become active."
• C) "The medication works only on the liver."
• D) "The medication should be taken with food to increase absorption."
ANswER: B – "The medication must be metabolized in the body to become active."
RAtioNAlE: A prodrug is a biologically inactive compound that must be metabolized in the body
to produce the active drug. Prednisone is an example of a prodrug that is converted to
prednisolone, the active anti-inflammatory form. Prodrugs are not active immediately and are
metabolized in various tissues, not exclusively the liver.
Question 7
A graduate nursing student is reviewing the process of drug movement through the
body. Which statement accurately describes the relationship between drug half-life and
steady-state concentration?
• A) Steady state is achieved after one half-life of regular dosing
• B) Steady state is typically reached within 4 to 5 half-lives of drug administration
• C) Steady state is independent of the drug's half-life
• D) Steady state occurs only after 24 hours of continuous infusion
ANswER: B – Steady state is typically reached within 4 to 5 half-lives of drug
administration
RAtioNAlE: Steady-state concentration is usually achieved after 4 to 5 half-lives of a drug,
assuming regular dosing intervals. At this point, the rate of drug administration equals the rate of
elimination. One half-life only achieves 50% of steady state.
Question 8
A patient is receiving a drug with a narrow therapeutic index. What is the clinical
implication of this?
