South University | NSG 6001: Advanced Pharmacology
Week 2 Quiz | 100% Correct
Part A: Pharmacology Across the Lifespan
Q1: A primary pharmacokinetic difference in healthy neonates compared to adults is:
● A. Increased glomerular filtration rate (GFR).
● B. Increased gastric acid production.
● C. Immature hepatic enzyme systems (e.g., cytochrome P450). [CORRECT]
● D. Increased plasma protein binding capacity.
Correct Answer: C
Rationale: Hepatic enzyme systems, particularly the cytochrome P450 system, are
immature at birth and develop over the first year of life. This significantly reduces the
metabolism of many drugs, prolonging their half-life and increasing the risk of toxicity.
GFR is lower in neonates (A). Gastric acid production is also lower (B). Protein binding
capacity is often reduced due to lower albumin levels (D).
Q2: When prescribing for an older adult (age >65), the APRN must be particularly
cautious of which common age-related pharmacodynamic change?
● A. Increased sensitivity to the effects of anticoagulants.
, ● B. Increased sensitivity to the effects of drugs acting on the central nervous
system (e.g., benzodiazepines, opioids). [CORRECT]
● C. Decreased sensitivity to beta-blockers.
● D. Decreased risk of orthostatic hypotension with antihypertensives.
Correct Answer: B
Rationale: Due to age-related changes in brain composition, receptor density, and
blood-brain barrier permeability, older adults exhibit increased sensitivity to CNS-acting
drugs. This leads to a higher risk of sedation, confusion, falls, and delirium at standard
adult doses. While anticoagulant sensitivity may increase due to PK changes (A), the PD
sensitivity to CNS drugs is the most clinically significant and well-documented concern.
Sensitivity to beta-blockers and orthostatic effects is typically increased, not decreased
(C, D), placing elderly patients at higher risk for bradycardia and falls.
Q3: A 28-year-old pregnant patient (second trimester) requires treatment for a bacterial
infection. According to the FDA Pregnancy and Lactation Labeling Rule (PLLR), which
statement best guides prescribing decisions?
● A. The historical Category A, B, C, D, X system remains the legal standard for all
pregnancy labeling.
● B. Pregnancy labeling now requires narrative summaries of risk, clinical
considerations, and lactation data rather than letter categories. [CORRECT]
● C. All drugs must be avoided during pregnancy unless they are Category A.
● D. The PLLR applies only to new drugs approved after 2020.
Correct Answer: B
, Rationale: The FDA Pregnancy and Lactation Labeling Rule (PLLR), fully implemented by
2020, replaced the old Category A-X system with detailed narrative sections addressing
pregnancy exposure, clinical considerations for dosing, and lactation safety. This
change reflects that risk is rarely binary and requires individualized risk-benefit analysis.
The letter categories (A) are obsolete. Avoiding all non-Category A drugs (C) is
impractical and often harmful. The PLLR applies to all drugs, not just post-2020
approvals (D).
Q4: An APRN is prescribing for a breastfeeding mother with postpartum depression.
Which principle is most important when evaluating medication safety?
● A. All psychotropic medications are absolutely contraindicated during lactation.
● B. Infant exposure depends on maternal plasma concentration, protein binding,
oral bioavailability, and molecular weight of the drug. [CORRECT]
● C. The time of highest milk production (3-5 days postpartum) is when drug
transfer is lowest.
● D. Drugs with high protein binding (>90%) always concentrate in breast milk.
Correct Answer: B
Rationale: Lactation safety assessment requires understanding multiple
pharmacokinetic factors: drugs with low maternal plasma levels, high protein binding
(which keeps drug in maternal circulation), large molecular weight (difficult to transfer
into milk), and low oral bioavailability (poorly absorbed by infant) generally pose lower
risk. Absolute contraindication of psychotropics (A) is incorrect—many are compatible
with breastfeeding. Early milk (colostrum) has different composition, but transfer
depends on drug properties, not production volume (C). High protein binding actually
reduces milk transfer (D).
Week 2 Quiz | 100% Correct
Part A: Pharmacology Across the Lifespan
Q1: A primary pharmacokinetic difference in healthy neonates compared to adults is:
● A. Increased glomerular filtration rate (GFR).
● B. Increased gastric acid production.
● C. Immature hepatic enzyme systems (e.g., cytochrome P450). [CORRECT]
● D. Increased plasma protein binding capacity.
Correct Answer: C
Rationale: Hepatic enzyme systems, particularly the cytochrome P450 system, are
immature at birth and develop over the first year of life. This significantly reduces the
metabolism of many drugs, prolonging their half-life and increasing the risk of toxicity.
GFR is lower in neonates (A). Gastric acid production is also lower (B). Protein binding
capacity is often reduced due to lower albumin levels (D).
Q2: When prescribing for an older adult (age >65), the APRN must be particularly
cautious of which common age-related pharmacodynamic change?
● A. Increased sensitivity to the effects of anticoagulants.
, ● B. Increased sensitivity to the effects of drugs acting on the central nervous
system (e.g., benzodiazepines, opioids). [CORRECT]
● C. Decreased sensitivity to beta-blockers.
● D. Decreased risk of orthostatic hypotension with antihypertensives.
Correct Answer: B
Rationale: Due to age-related changes in brain composition, receptor density, and
blood-brain barrier permeability, older adults exhibit increased sensitivity to CNS-acting
drugs. This leads to a higher risk of sedation, confusion, falls, and delirium at standard
adult doses. While anticoagulant sensitivity may increase due to PK changes (A), the PD
sensitivity to CNS drugs is the most clinically significant and well-documented concern.
Sensitivity to beta-blockers and orthostatic effects is typically increased, not decreased
(C, D), placing elderly patients at higher risk for bradycardia and falls.
Q3: A 28-year-old pregnant patient (second trimester) requires treatment for a bacterial
infection. According to the FDA Pregnancy and Lactation Labeling Rule (PLLR), which
statement best guides prescribing decisions?
● A. The historical Category A, B, C, D, X system remains the legal standard for all
pregnancy labeling.
● B. Pregnancy labeling now requires narrative summaries of risk, clinical
considerations, and lactation data rather than letter categories. [CORRECT]
● C. All drugs must be avoided during pregnancy unless they are Category A.
● D. The PLLR applies only to new drugs approved after 2020.
Correct Answer: B
, Rationale: The FDA Pregnancy and Lactation Labeling Rule (PLLR), fully implemented by
2020, replaced the old Category A-X system with detailed narrative sections addressing
pregnancy exposure, clinical considerations for dosing, and lactation safety. This
change reflects that risk is rarely binary and requires individualized risk-benefit analysis.
The letter categories (A) are obsolete. Avoiding all non-Category A drugs (C) is
impractical and often harmful. The PLLR applies to all drugs, not just post-2020
approvals (D).
Q4: An APRN is prescribing for a breastfeeding mother with postpartum depression.
Which principle is most important when evaluating medication safety?
● A. All psychotropic medications are absolutely contraindicated during lactation.
● B. Infant exposure depends on maternal plasma concentration, protein binding,
oral bioavailability, and molecular weight of the drug. [CORRECT]
● C. The time of highest milk production (3-5 days postpartum) is when drug
transfer is lowest.
● D. Drugs with high protein binding (>90%) always concentrate in breast milk.
Correct Answer: B
Rationale: Lactation safety assessment requires understanding multiple
pharmacokinetic factors: drugs with low maternal plasma levels, high protein binding
(which keeps drug in maternal circulation), large molecular weight (difficult to transfer
into milk), and low oral bioavailability (poorly absorbed by infant) generally pose lower
risk. Absolute contraindication of psychotropics (A) is incorrect—many are compatible
with breastfeeding. Early milk (colostrum) has different composition, but transfer
depends on drug properties, not production volume (C). High protein binding actually
reduces milk transfer (D).
