NURS 6521 Advanced Pharmacology – Midterm
Comprehensive Examination
Academic Year 2026/2027 – 150 Multiple-Choice
Questions with Correct Answers and Rationales
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
(Questions 1–30)
1. First-pass metabolism occurs primarily in which organ?
A) Kidneys
B) Lungs
C) Liver
D) Intestines
Correct Answer: C) Liver
Rationale: First-pass metabolism occurs when a drug is metabolized in the
liver before reaching systemic circulation, reducing its bioavailability. Drugs
administered orally pass through the hepatic portal system and undergo
metabolism by hepatic enzymes, particularly the CYP450 system.
,2. Bioavailability refers to:
A) The distribution of a drug to target tissues
B) The amount of active drug that reaches systemic circulation
C) The rate at which a drug is metabolized
D) The time required for drug excretion
Correct Answer: B) The amount of active drug that reaches systemic
circulation
Rationale: Bioavailability is the fraction of the administered drug dose that
reaches systemic circulation in its unchanged, active form. Intravenous
administration has 100% bioavailability because the drug bypasses
absorption barriers.
3. A drug's half-life determines:
A) Its potency at receptor sites
B) Its duration of action and dosing interval
C) The rate of drug absorption
D) The extent of protein binding
Correct Answer: B) Its duration of action and dosing interval
Rationale: Half-life (t½) is the time required for plasma concentration to
decrease by 50%. It determines dosing frequency and time to reach steady
state.
,4. A drug with a short half-life typically requires:
A) Less frequent dosing
B) More frequent dosing to maintain therapeutic levels
C) No maintenance dosing
D) A loading dose only
Correct Answer: B) More frequent dosing to maintain therapeutic
levels
Rationale: Drugs with short half-lives are eliminated rapidly, requiring
frequent dosing to maintain concentrations within the therapeutic range.
5. The volume of distribution (Vd) indicates:
A) The extent of drug distribution into tissues
B) The rate of drug elimination
C) The degree of protein binding
D) The rate of drug absorption
Correct Answer: A) The extent of drug distribution into tissues
Rationale: Volume of distribution is a theoretical volume that relates the
amount of drug in the body to its plasma concentration. A large Vd
indicates extensive tissue distribution.
6. A patient is prescribed a drug with a half-life of 12 hours.
Approximately how long will it take for this drug to reach steady-state
, concentration if administered via continuous IV infusion?
A) 12 hours
B) 24 hours
C) 36 hours
D) 60 hours
Correct Answer: D) 60 hours
Rationale: It takes approximately 4 to 5 half-lives for a drug to reach
steady-state concentration. Five half-lives equal 60 hours.
7. Which of the following best describes the concept of
"bioavailability"?
A) The time it takes for a drug to reach peak plasma concentration
B) The fraction of an administered dose of unchanged drug that reaches
the systemic circulation
C) The process by which a drug is transported across biological
membranes
D) The rate at which a drug is metabolized by the liver
Correct Answer: B) The fraction of an administered dose of
unchanged drug that reaches the systemic circulation
Rationale: Bioavailability refers to the proportion of an active drug that
reaches the systemic circulation and is available at the site of action.
Comprehensive Examination
Academic Year 2026/2027 – 150 Multiple-Choice
Questions with Correct Answers and Rationales
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
(Questions 1–30)
1. First-pass metabolism occurs primarily in which organ?
A) Kidneys
B) Lungs
C) Liver
D) Intestines
Correct Answer: C) Liver
Rationale: First-pass metabolism occurs when a drug is metabolized in the
liver before reaching systemic circulation, reducing its bioavailability. Drugs
administered orally pass through the hepatic portal system and undergo
metabolism by hepatic enzymes, particularly the CYP450 system.
,2. Bioavailability refers to:
A) The distribution of a drug to target tissues
B) The amount of active drug that reaches systemic circulation
C) The rate at which a drug is metabolized
D) The time required for drug excretion
Correct Answer: B) The amount of active drug that reaches systemic
circulation
Rationale: Bioavailability is the fraction of the administered drug dose that
reaches systemic circulation in its unchanged, active form. Intravenous
administration has 100% bioavailability because the drug bypasses
absorption barriers.
3. A drug's half-life determines:
A) Its potency at receptor sites
B) Its duration of action and dosing interval
C) The rate of drug absorption
D) The extent of protein binding
Correct Answer: B) Its duration of action and dosing interval
Rationale: Half-life (t½) is the time required for plasma concentration to
decrease by 50%. It determines dosing frequency and time to reach steady
state.
,4. A drug with a short half-life typically requires:
A) Less frequent dosing
B) More frequent dosing to maintain therapeutic levels
C) No maintenance dosing
D) A loading dose only
Correct Answer: B) More frequent dosing to maintain therapeutic
levels
Rationale: Drugs with short half-lives are eliminated rapidly, requiring
frequent dosing to maintain concentrations within the therapeutic range.
5. The volume of distribution (Vd) indicates:
A) The extent of drug distribution into tissues
B) The rate of drug elimination
C) The degree of protein binding
D) The rate of drug absorption
Correct Answer: A) The extent of drug distribution into tissues
Rationale: Volume of distribution is a theoretical volume that relates the
amount of drug in the body to its plasma concentration. A large Vd
indicates extensive tissue distribution.
6. A patient is prescribed a drug with a half-life of 12 hours.
Approximately how long will it take for this drug to reach steady-state
, concentration if administered via continuous IV infusion?
A) 12 hours
B) 24 hours
C) 36 hours
D) 60 hours
Correct Answer: D) 60 hours
Rationale: It takes approximately 4 to 5 half-lives for a drug to reach
steady-state concentration. Five half-lives equal 60 hours.
7. Which of the following best describes the concept of
"bioavailability"?
A) The time it takes for a drug to reach peak plasma concentration
B) The fraction of an administered dose of unchanged drug that reaches
the systemic circulation
C) The process by which a drug is transported across biological
membranes
D) The rate at which a drug is metabolized by the liver
Correct Answer: B) The fraction of an administered dose of
unchanged drug that reaches the systemic circulation
Rationale: Bioavailability refers to the proportion of an active drug that
reaches the systemic circulation and is available at the site of action.
