Pharmacology for Care of the Family Review | Questions &
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Section 1: Foundational Pharmacology Principles Review
Q1: A 68-year-old patient with atrial fibrillation is prescribed warfarin. The prescriber
explains that the therapeutic index is narrow, meaning:
A. The drug has a wide safety margin between effective and toxic doses
B. Small changes in dose or metabolism can lead to toxicity or therapeutic failure
[CORRECT]
C. The drug is safe to use in any dose without monitoring
D. Therapeutic effects occur immediately without loading dose
Correct Answer: B
Rationale: For the midterm review, remember that narrow therapeutic index drugs like
warfarin, digoxin, lithium, and phenytoin require frequent monitoring because the
difference between effective and toxic concentrations is small—small metabolic
changes, drug interactions, or dietary variations can push patients into bleeding or
clotting risk.
Q2: A patient taking rifampin for tuberculosis notices their oral contraceptive is less
effective. This interaction occurs because rifampin is a:
A. CYP3A4 inhibitor, increasing estrogen levels
B. CYP3A4 inducer, increasing metabolism of contraceptive hormones [CORRECT]
,C. CYP2D6 inhibitor, blocking prodrug activation
D. P-glycoprotein inhibitor, increasing drug absorption
Correct Answer: B
Rationale: The best choice here is recognizing rifampin as a potent CYP450 inducer—it
increases enzyme production, accelerating metabolism of CYP3A4 substrates including
estrogen, progestins, warfarin, and many others, leading to therapeutic failures that are
frequently tested on midterms.
Q3: A patient develops anaphylaxis after their first dose of penicillin. This adverse drug
reaction is classified as:
A. Type A (augmented/predictable)
B. Type B (bizarre/idiosyncratic) [CORRECT]
C. Type C (chronic use related)
D. Type D (delayed effect)
Correct Answer: B
Rationale: A common midterm question tests this concept because Type B reactions
are unpredictable, not dose-dependent, and often immunologically
mediated—anaphylaxis is classic Type B, while Type A reactions (like NSAID gastritis)
are predictable and dose-related.
Q4: A 4-year-old child requires antibiotic therapy. Which principle guides pediatric
dosing?
A. Use adult doses adjusted for height
B. Weight-based dosing with attention to developmental pharmacokinetics [CORRECT]
C. Children metabolize drugs identically to adults
D. Avoid all medications in children under 6 years
,Correct Answer: B
Rationale: That's correct because in family practice, pediatric dosing relies on weight
(mg/kg) with additional considerations for organ maturation—infants have reduced
hepatic metabolism and renal excretion, while older children may metabolize faster than
adults, requiring careful age-specific adjustments.
Q5: A pregnant patient asks about medication safety. Which FDA pregnancy category
indicates the highest risk and should generally be avoided?
A. Category C (risk cannot be ruled out)
B. Category D (positive evidence of risk)
C. Category X (contraindicated, risk outweighs benefit) [CORRECT]
D. Category B (no risk in animal studies)
Correct Answer: C
Rationale: For the midterm review, remember Category X drugs like isotretinoin,
thalidomide, and warfarin show clear fetal risk that outweighs any potential benefit—this
is the most restrictive category and frequently appears on exams asking about
teratogenic medications.
Q6: A 78-year-old patient with insomnia is prescribed diphenhydramine. According to
Beers criteria, the primary concern is:
A. Effective sleep promotion without side effects
B. Strong anticholinergic properties causing confusion, falls, urinary retention, and
constipation [CORRECT]
C. Excessive cost for elderly patients
D. Ineffectiveness in patients over 65
Correct Answer: B
, Rationale: The best choice here recognizes diphenhydramine as potentially
inappropriate in older adults due to anticholinergic burden—this is a classic Beers
criteria question that appears on every pharmacology midterm because it tests
application of geriatric prescribing principles to avoid delirium and falls.
Q7: A patient with liver cirrhosis is prescribed lorazepam instead of diazepam because:
A. Lorazepam undergoes glucuronidation (Phase II), preserved in hepatic impairment
[CORRECT]
B. Diazepam is less potent and requires higher doses
C. Lorazepam is metabolized by extrahepatic enzymes
D. Diazepam causes more respiratory depression in cirrhosis
Correct Answer: A
Rationale: That's correct because in family practice with hepatic impairment, we prefer
lorazepam, oxazepam, and temazepam (LOT drugs) that undergo Phase II
glucuronidation rather than Phase I oxidation—this preserves their metabolism in
cirrhosis while diazepam and chlordiazepoxide accumulate dangerously.
Q8: A patient on chronic prednisone for 3 weeks requires surgery. The anesthesia team
should be concerned about:
A. Adrenal suppression and inability to mount stress response [CORRECT]
B. Excessive cortisol production during surgical stress
C. Enhanced anesthetic metabolism requiring higher doses
D. Severe hyperglycemia precluding any corticosteroid use
Correct Answer: A
Rationale: A frequently tested on midterm concept—exogenous steroids suppress the
hypothalamic-pituitary-adrenal axis, and the atrophied adrenal glands cannot produce