GALEN PHARM 210 EXAM 2 2026/2027 | 100%
Correct Answers with Complete Solutions |
Pharmacological Principles | Medication
Administration | Drug Classifications | Pass
Guaranteed - A+ Graded
Unit 1: Pharmacokinetics & Pharmacodynamics (12 Questions)
Q1: A 68-year-old male with liver cirrhosis is prescribed lorazepam for anxiety. The nurse
notes the medication order is for a reduced dose compared to standard adult dosing.
Which pharmacokinetic principle explains the need for dose reduction?
A. Decreased drug absorption due to portal hypertension
B. Reduced hepatic metabolism and first-pass effect [CORRECT]
C. Increased renal excretion of active metabolites
D. Enhanced drug distribution to adipose tissue
Correct Answer: B
Rationale: Lorazepam undergoes hepatic metabolism via glucuronidation. Liver
cirrhosis reduces functional hepatocytes and hepatic blood flow, decreasing first-pass
metabolism and prolonging drug half-life. Reduced dosing prevents accumulation and
toxicity. Option A is incorrect because lorazepam absorption isn't significantly affected
,by portal hypertension (it's an IV/oral benzodiazepine with high bioavailability). Option C
is incorrect because lorazepam metabolites are inactive and renal excretion isn't the
primary concern. Option D is incorrect because while distribution may change, the
primary issue is impaired metabolism leading to drug accumulation.
Q2: A patient is receiving a new medication with a half-life of 8 hours. The nurse
understands that steady state concentration will be achieved after approximately how
many hours?
A. 8 hours
B. 24 hours
C. 40 hours [CORRECT]
D. 72 hours
Correct Answer: C
Rationale: Steady state is achieved after approximately 5 half-lives (when 97% of steady
state concentration is reached). 5 × 8 hours = 40 hours. Option A represents one half-life
(50% elimination). Option B represents approximately 3 half-lives (87.5% of steady
state). Option D exceeds the necessary time frame for this medication.
Q3: A patient taking propranolol for hypertension reports dizziness when standing up
quickly. Which pharmacodynamic concept explains this adverse effect?
,A. Tachyphylaxis to beta-adrenergic blockade
B. Non-selective beta-blockade causing reduced compensatory vasoconstriction
[CORRECT]
C. Agonist activity at alpha-1 receptors
D. Receptor upregulation with chronic use
Correct Answer: B
Rationale: Propranolol is a non-selective beta-blocker (blocks β1 and β2). Normally,
when standing, α1 receptors cause vasoconstriction to maintain BP, while β2 blockade
prevents compensatory vasodilation. However, unopposed α1 activity combined with
reduced cardiac output from β1 blockade causes orthostatic hypotension. The
non-selective blockade of β2 receptors in blood vessels prevents vasodilation,
contributing to reduced perfusion when upright. Option A refers to rapid tolerance
development. Option C is incorrect (propranolol has no alpha agonist activity). Option D
refers to receptor changes with chronic antagonist use, not acute orthostatic effects.
Q4: A nurse is teaching a patient about a new medication that is a partial agonist at
specific receptors. Which statement best describes the therapeutic implication of
partial agonism?
A. The drug will produce a maximal response greater than a full agonist
B. The drug produces submaximal response even at 100% receptor occupancy
[CORRECT]
C. The drug blocks all receptor activity without producing any effect
D. The drug requires higher doses to achieve receptor binding
, Correct Answer: B
Rationale: Partial agonists have intermediate intrinsic activity—they produce a
submaximal response even when all receptors are occupied, and can act as antagonists
in the presence of full agonists by competing for binding. Option A describes a
superagonist. Option C describes a pure antagonist. Option D describes competitive
binding kinetics, not partial agonism.
Q5: A patient with renal failure is prescribed a medication that is 90% excreted
unchanged by the kidneys. Which nursing action is priority?
A. Monitor for therapeutic effectiveness only
B. Assess for drug accumulation and toxicity, and anticipate dose reduction [CORRECT]
C. Increase fluid intake to enhance renal clearance
D. Administer the medication with food to reduce absorption
Correct Answer: B
Rationale: Drugs primarily excreted by kidneys (e.g., aminoglycosides, digoxin, lithium,
vancomycin) require dose adjustment in renal failure to prevent accumulation and
toxicity. Monitoring drug levels and clinical signs of toxicity is essential. Option A is
insufficient (toxicity risk outweighs efficacy concerns). Option C is dangerous (fluid
overload in renal failure). Option D doesn't address the excretion problem and may alter
absorption unpredictably.
Correct Answers with Complete Solutions |
Pharmacological Principles | Medication
Administration | Drug Classifications | Pass
Guaranteed - A+ Graded
Unit 1: Pharmacokinetics & Pharmacodynamics (12 Questions)
Q1: A 68-year-old male with liver cirrhosis is prescribed lorazepam for anxiety. The nurse
notes the medication order is for a reduced dose compared to standard adult dosing.
Which pharmacokinetic principle explains the need for dose reduction?
A. Decreased drug absorption due to portal hypertension
B. Reduced hepatic metabolism and first-pass effect [CORRECT]
C. Increased renal excretion of active metabolites
D. Enhanced drug distribution to adipose tissue
Correct Answer: B
Rationale: Lorazepam undergoes hepatic metabolism via glucuronidation. Liver
cirrhosis reduces functional hepatocytes and hepatic blood flow, decreasing first-pass
metabolism and prolonging drug half-life. Reduced dosing prevents accumulation and
toxicity. Option A is incorrect because lorazepam absorption isn't significantly affected
,by portal hypertension (it's an IV/oral benzodiazepine with high bioavailability). Option C
is incorrect because lorazepam metabolites are inactive and renal excretion isn't the
primary concern. Option D is incorrect because while distribution may change, the
primary issue is impaired metabolism leading to drug accumulation.
Q2: A patient is receiving a new medication with a half-life of 8 hours. The nurse
understands that steady state concentration will be achieved after approximately how
many hours?
A. 8 hours
B. 24 hours
C. 40 hours [CORRECT]
D. 72 hours
Correct Answer: C
Rationale: Steady state is achieved after approximately 5 half-lives (when 97% of steady
state concentration is reached). 5 × 8 hours = 40 hours. Option A represents one half-life
(50% elimination). Option B represents approximately 3 half-lives (87.5% of steady
state). Option D exceeds the necessary time frame for this medication.
Q3: A patient taking propranolol for hypertension reports dizziness when standing up
quickly. Which pharmacodynamic concept explains this adverse effect?
,A. Tachyphylaxis to beta-adrenergic blockade
B. Non-selective beta-blockade causing reduced compensatory vasoconstriction
[CORRECT]
C. Agonist activity at alpha-1 receptors
D. Receptor upregulation with chronic use
Correct Answer: B
Rationale: Propranolol is a non-selective beta-blocker (blocks β1 and β2). Normally,
when standing, α1 receptors cause vasoconstriction to maintain BP, while β2 blockade
prevents compensatory vasodilation. However, unopposed α1 activity combined with
reduced cardiac output from β1 blockade causes orthostatic hypotension. The
non-selective blockade of β2 receptors in blood vessels prevents vasodilation,
contributing to reduced perfusion when upright. Option A refers to rapid tolerance
development. Option C is incorrect (propranolol has no alpha agonist activity). Option D
refers to receptor changes with chronic antagonist use, not acute orthostatic effects.
Q4: A nurse is teaching a patient about a new medication that is a partial agonist at
specific receptors. Which statement best describes the therapeutic implication of
partial agonism?
A. The drug will produce a maximal response greater than a full agonist
B. The drug produces submaximal response even at 100% receptor occupancy
[CORRECT]
C. The drug blocks all receptor activity without producing any effect
D. The drug requires higher doses to achieve receptor binding
, Correct Answer: B
Rationale: Partial agonists have intermediate intrinsic activity—they produce a
submaximal response even when all receptors are occupied, and can act as antagonists
in the presence of full agonists by competing for binding. Option A describes a
superagonist. Option C describes a pure antagonist. Option D describes competitive
binding kinetics, not partial agonism.
Q5: A patient with renal failure is prescribed a medication that is 90% excreted
unchanged by the kidneys. Which nursing action is priority?
A. Monitor for therapeutic effectiveness only
B. Assess for drug accumulation and toxicity, and anticipate dose reduction [CORRECT]
C. Increase fluid intake to enhance renal clearance
D. Administer the medication with food to reduce absorption
Correct Answer: B
Rationale: Drugs primarily excreted by kidneys (e.g., aminoglycosides, digoxin, lithium,
vancomycin) require dose adjustment in renal failure to prevent accumulation and
toxicity. Monitoring drug levels and clinical signs of toxicity is essential. Option A is
insufficient (toxicity risk outweighs efficacy concerns). Option C is dangerous (fluid
overload in renal failure). Option D doesn't address the excretion problem and may alter
absorption unpredictably.
