1
75 PHARMACOLOGY FUNDAMENTALS
QUESTIONS 2025–2026 | PHARMACOKINETICS,
PHARMACODYNAMICS & NURSING DRUG
SAFETY
1. A 68-year-old patient is admitted with confusion. The nurse reviews the medication list
and notes the patient was recently started on a new benzodiazepine that is highly lipid
soluble. Which pharmacokinetic property most directly explains why this drug can
rapidly enter the brain and cause central nervous system effects?
A. High protein binding
B. High lipid solubility
C. Large molecular size
D. Low hepatic metabolism
Correct answer: B. High lipid solubility
Rationale: Lipid-soluble drugs cross cell membranes (including the blood–brain barrier)
by passive diffusion more readily than water-soluble drugs, allowing rapid CNS
penetration.
A is incorrect: high protein binding reduces free drug available for tissue
distribution.
, 2
C is incorrect: large molecular size generally hinders membrane passage.
D is incorrect: hepatic metabolism affects duration, not initial CNS penetration.
2. A nurse is teaching a patient about the difference between a drug’s generic name and
trade (brand) name. Which statement best describes the difference?
A. The trade name is the chemical name; the generic is the company’s brand.
B. The generic name is the nonproprietary name, and the trade name is proprietary and
chosen by the manufacturer.
C. The generic name is always longer and harder to pronounce than the trade name.
D. The trade name is required in legal prescriptions; generic names are not allowed.
Correct answer: B. The generic name is the nonproprietary name, and the trade
name is proprietary and chosen by the manufacturer.
Rationale: Generic (nonproprietary) names are assigned to active ingredients; brand
names are registered by manufacturers.
A is backwards.
C is not a rule (sometimes generic names are longer, but not always).
D is false: prescriptions may use either, depending on regulations and prescriber
preference.
3. A drug has an oral bioavailability of 25% due to extensive first-pass hepatic
metabolism. Which nursing implication is most accurate?
A. The oral dose should be lower than the intravenous dose.
B. The oral route will produce identical plasma levels as IV.
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C. A larger oral dose may be needed to achieve therapeutic plasma concentration
compared with IV.
D. First-pass only affects drugs given by IV route.
Correct answer: C. A larger oral dose may be needed to achieve therapeutic plasma
concentration compared with IV.
Rationale: Low oral bioavailability due to first-pass metabolism means much of the drug
is inactivated before reaching systemic circulation — so oral doses often must be larger
than IV to reach equivalent plasma levels.
A is incorrect (oral dose would typically be higher, not lower).
B is incorrect (oral and IV often differ).
D is incorrect (first-pass affects oral/enteral routes, not IV).
4. Which process describes the movement of a drug from the bloodstream into tissues and
cells?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Correct answer: B. Distribution
Rationale: Distribution is the process by which drug molecules leave the blood and enter
interstitial and intracellular fluids.
A is incorrect: absorption is entry into the bloodstream from site of
administration.
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C is incorrect: metabolism is biotransformation (usually hepatic).
D is incorrect: excretion is elimination from the body (renal, biliary).
5. A drug’s half-life is 8 hours. Approximately how long will it take to reach steady state
with regular dosing?
A. 8 hours
B. 16 hours
C. 24 hours
D. About 40 hours
Correct answer: D. About 40 hours
Rationale: It takes ~4–5 half-lives to reach steady state. 5 × 8 = 40 hours (approx).
A–C are too short; they represent 1–3 half-lives rather than the typical 4–5
required.
6. A patient’s serum albumin is low because of malnutrition. A nurse should recognize
that for highly albumin-bound drugs, this condition will likely cause:
A. Decreased free (active) drug concentration and reduced effect.
B. Increased free (active) drug concentration and potential toxicity.
C. No change in drug effect because protein binding is irrelevant.
D. Increased renal excretion due to more protein available.
Correct answer: B. Increased free (active) drug concentration and potential toxicity.
Rationale: Low albumin reduces protein binding, increasing the fraction of free
(pharmacologically active) drug, which can enhance effect and toxicity risk.
A is the opposite.
75 PHARMACOLOGY FUNDAMENTALS
QUESTIONS 2025–2026 | PHARMACOKINETICS,
PHARMACODYNAMICS & NURSING DRUG
SAFETY
1. A 68-year-old patient is admitted with confusion. The nurse reviews the medication list
and notes the patient was recently started on a new benzodiazepine that is highly lipid
soluble. Which pharmacokinetic property most directly explains why this drug can
rapidly enter the brain and cause central nervous system effects?
A. High protein binding
B. High lipid solubility
C. Large molecular size
D. Low hepatic metabolism
Correct answer: B. High lipid solubility
Rationale: Lipid-soluble drugs cross cell membranes (including the blood–brain barrier)
by passive diffusion more readily than water-soluble drugs, allowing rapid CNS
penetration.
A is incorrect: high protein binding reduces free drug available for tissue
distribution.
, 2
C is incorrect: large molecular size generally hinders membrane passage.
D is incorrect: hepatic metabolism affects duration, not initial CNS penetration.
2. A nurse is teaching a patient about the difference between a drug’s generic name and
trade (brand) name. Which statement best describes the difference?
A. The trade name is the chemical name; the generic is the company’s brand.
B. The generic name is the nonproprietary name, and the trade name is proprietary and
chosen by the manufacturer.
C. The generic name is always longer and harder to pronounce than the trade name.
D. The trade name is required in legal prescriptions; generic names are not allowed.
Correct answer: B. The generic name is the nonproprietary name, and the trade
name is proprietary and chosen by the manufacturer.
Rationale: Generic (nonproprietary) names are assigned to active ingredients; brand
names are registered by manufacturers.
A is backwards.
C is not a rule (sometimes generic names are longer, but not always).
D is false: prescriptions may use either, depending on regulations and prescriber
preference.
3. A drug has an oral bioavailability of 25% due to extensive first-pass hepatic
metabolism. Which nursing implication is most accurate?
A. The oral dose should be lower than the intravenous dose.
B. The oral route will produce identical plasma levels as IV.
, 3
C. A larger oral dose may be needed to achieve therapeutic plasma concentration
compared with IV.
D. First-pass only affects drugs given by IV route.
Correct answer: C. A larger oral dose may be needed to achieve therapeutic plasma
concentration compared with IV.
Rationale: Low oral bioavailability due to first-pass metabolism means much of the drug
is inactivated before reaching systemic circulation — so oral doses often must be larger
than IV to reach equivalent plasma levels.
A is incorrect (oral dose would typically be higher, not lower).
B is incorrect (oral and IV often differ).
D is incorrect (first-pass affects oral/enteral routes, not IV).
4. Which process describes the movement of a drug from the bloodstream into tissues and
cells?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Correct answer: B. Distribution
Rationale: Distribution is the process by which drug molecules leave the blood and enter
interstitial and intracellular fluids.
A is incorrect: absorption is entry into the bloodstream from site of
administration.
, 4
C is incorrect: metabolism is biotransformation (usually hepatic).
D is incorrect: excretion is elimination from the body (renal, biliary).
5. A drug’s half-life is 8 hours. Approximately how long will it take to reach steady state
with regular dosing?
A. 8 hours
B. 16 hours
C. 24 hours
D. About 40 hours
Correct answer: D. About 40 hours
Rationale: It takes ~4–5 half-lives to reach steady state. 5 × 8 = 40 hours (approx).
A–C are too short; they represent 1–3 half-lives rather than the typical 4–5
required.
6. A patient’s serum albumin is low because of malnutrition. A nurse should recognize
that for highly albumin-bound drugs, this condition will likely cause:
A. Decreased free (active) drug concentration and reduced effect.
B. Increased free (active) drug concentration and potential toxicity.
C. No change in drug effect because protein binding is irrelevant.
D. Increased renal excretion due to more protein available.
Correct answer: B. Increased free (active) drug concentration and potential toxicity.
Rationale: Low albumin reduces protein binding, increasing the fraction of free
(pharmacologically active) drug, which can enhance effect and toxicity risk.
A is the opposite.
