NURS 5334 Advanced Pharmacology: Quiz 1 | 40
Questions and Correct Answers plus Rationale |
Graded A+ | New Update 2026-2027 | UTA
Question 1: A patient is prescribed Drug A, which has a half-life of 8 hours.
How long will it take to reach steady-state concentration with regular dosing?
A. 8 hours
B. 16 hours
C. 24 hours
D. 40 hours
Correct Answer: D. 40 hours
Rationale: Steady-state concentration is reached after approximately 5 half-lives
of drug administration. With a half-life of 8 hours, steady-state is achieved at 5 × 8
= 40 hours. At steady-state, the rate of drug administration equals the rate of drug
elimination, resulting in relatively constant plasma concentrations. Option A (8
hours) represents one half-life, not steady-state. Option B (16 hours) represents two
half-lives. Option C (24 hours) represents three half-lives. Understanding the
concept of steady-state is crucial for appropriate dosing intervals and therapeutic
drug monitoring. Drugs with longer half-lives take longer to reach steady-state,
which is why loading doses are sometimes used.
Question 2: Which statement best describes a drug with high first-pass
metabolism?
A. It is well absorbed in the GI tract
B. It is highly bioavailable
C. It is extensively metabolized by the liver before reaching systemic circulation
D. It is not affected by liver enzymes
Correct Answer: C. It is extensively metabolized by the liver before reaching
systemic circulation
,Rationale: High first-pass metabolism means the drug is significantly metabolized
in the liver before reaching systemic circulation, reducing its bioavailability. After
oral administration, drugs absorbed from the GI tract travel via the portal vein to
the liver, where they may be extensively metabolized before entering the general
circulation. Option A is incorrect; while the drug may be absorbed, the key point is
the hepatic metabolism. Option B is incorrect; high first-pass metabolism results in
low bioavailability, not high. Option D is incorrect; the drug is definitely affected
by liver enzymes. Examples of drugs with high first-pass metabolism include
propranolol, morphine, and nitroglycerin. This is why some drugs must be given
via alternative routes (sublingual, transdermal, IV) to bypass first-pass metabolism.
Question 3: Which side effect is most commonly associated with tamsulosin?
A. Constipation
B. Hypotension
C. Dry mouth
D. Insomnia
Correct Answer: B. Hypotension
Rationale: Tamsulosin, an alpha-1 blocker used for benign prostatic hyperplasia
(BPH), commonly causes orthostatic hypotension. By blocking alpha-1 adrenergic
receptors in vascular smooth muscle, it causes vasodilation and can lead to a drop
in blood pressure, especially when standing up. Option A (Constipation) is more
commonly associated with anticholinergic medications. Option C (Dry mouth) is
also associated with anticholinergics, not tamsulosin. Option D (Insomnia) is not a
typical side effect of tamsulosin. Patients should be advised to rise slowly from
sitting or lying positions to minimize the risk of falls. Tamsulosin is relatively
selective for alpha-1A receptors in the prostate and bladder, making it more
uroselective than older alpha-blockers.
Question 4: A male patient taking sildenafil should be warned to avoid which
medication due to the risk of severe hypotension?
A. Acetaminophen
B. Amlodipine
, C. Nitrates
D. NSAIDs
Correct Answer: C. Nitrates
Rationale: Sildenafil and nitrates both cause vasodilation and can cause a
dangerous drop in blood pressure when combined. Sildenafil inhibits
phosphodiesterase type 5 (PDE5), leading to increased cGMP and vasodilation.
Nitrates also increase cGMP through a different mechanism. Concomitant use can
lead to severe hypotension, syncope, and even death. Option A (Acetaminophen) is
an analgesic and does not interact with sildenafil. Option B (Amlodipine) is a
calcium channel blocker that may have additive hypotensive effects but is not
contraindicated. Option D (NSAIDs) do not have this interaction. This is a well-
known, life-threatening drug interaction that is contraindicated. Patients with
erectile dysfunction who take nitrates should not be prescribed sildenafil.
Question 5: Which pharmacokinetic change is most common in elderly
patients?
A. Increased renal clearance
B. Increased liver enzyme activity
C. Increased body water
D. Decreased renal clearance
Correct Answer: D. Decreased renal clearance
Rationale: Aging decreases renal function, affecting drug clearance. Renal blood
flow and glomerular filtration rate decline with age, leading to decreased clearance
of renally eliminated drugs. Option A is incorrect; renal clearance decreases, not
increases. Option B is incorrect; liver enzyme activity generally decreases with
age. Option C is incorrect; total body water decreases with age, which can affect
the volume of distribution of water-soluble drugs. Age-related changes in
pharmacokinetics include decreased renal clearance, decreased hepatic
metabolism, decreased body water, increased body fat, and decreased serum
albumin. These changes necessitate dose adjustments in elderly patients, especially
for drugs with narrow therapeutic indices.
Question 6: Which of the following drugs is safest for use in pregnancy?
Questions and Correct Answers plus Rationale |
Graded A+ | New Update 2026-2027 | UTA
Question 1: A patient is prescribed Drug A, which has a half-life of 8 hours.
How long will it take to reach steady-state concentration with regular dosing?
A. 8 hours
B. 16 hours
C. 24 hours
D. 40 hours
Correct Answer: D. 40 hours
Rationale: Steady-state concentration is reached after approximately 5 half-lives
of drug administration. With a half-life of 8 hours, steady-state is achieved at 5 × 8
= 40 hours. At steady-state, the rate of drug administration equals the rate of drug
elimination, resulting in relatively constant plasma concentrations. Option A (8
hours) represents one half-life, not steady-state. Option B (16 hours) represents two
half-lives. Option C (24 hours) represents three half-lives. Understanding the
concept of steady-state is crucial for appropriate dosing intervals and therapeutic
drug monitoring. Drugs with longer half-lives take longer to reach steady-state,
which is why loading doses are sometimes used.
Question 2: Which statement best describes a drug with high first-pass
metabolism?
A. It is well absorbed in the GI tract
B. It is highly bioavailable
C. It is extensively metabolized by the liver before reaching systemic circulation
D. It is not affected by liver enzymes
Correct Answer: C. It is extensively metabolized by the liver before reaching
systemic circulation
,Rationale: High first-pass metabolism means the drug is significantly metabolized
in the liver before reaching systemic circulation, reducing its bioavailability. After
oral administration, drugs absorbed from the GI tract travel via the portal vein to
the liver, where they may be extensively metabolized before entering the general
circulation. Option A is incorrect; while the drug may be absorbed, the key point is
the hepatic metabolism. Option B is incorrect; high first-pass metabolism results in
low bioavailability, not high. Option D is incorrect; the drug is definitely affected
by liver enzymes. Examples of drugs with high first-pass metabolism include
propranolol, morphine, and nitroglycerin. This is why some drugs must be given
via alternative routes (sublingual, transdermal, IV) to bypass first-pass metabolism.
Question 3: Which side effect is most commonly associated with tamsulosin?
A. Constipation
B. Hypotension
C. Dry mouth
D. Insomnia
Correct Answer: B. Hypotension
Rationale: Tamsulosin, an alpha-1 blocker used for benign prostatic hyperplasia
(BPH), commonly causes orthostatic hypotension. By blocking alpha-1 adrenergic
receptors in vascular smooth muscle, it causes vasodilation and can lead to a drop
in blood pressure, especially when standing up. Option A (Constipation) is more
commonly associated with anticholinergic medications. Option C (Dry mouth) is
also associated with anticholinergics, not tamsulosin. Option D (Insomnia) is not a
typical side effect of tamsulosin. Patients should be advised to rise slowly from
sitting or lying positions to minimize the risk of falls. Tamsulosin is relatively
selective for alpha-1A receptors in the prostate and bladder, making it more
uroselective than older alpha-blockers.
Question 4: A male patient taking sildenafil should be warned to avoid which
medication due to the risk of severe hypotension?
A. Acetaminophen
B. Amlodipine
, C. Nitrates
D. NSAIDs
Correct Answer: C. Nitrates
Rationale: Sildenafil and nitrates both cause vasodilation and can cause a
dangerous drop in blood pressure when combined. Sildenafil inhibits
phosphodiesterase type 5 (PDE5), leading to increased cGMP and vasodilation.
Nitrates also increase cGMP through a different mechanism. Concomitant use can
lead to severe hypotension, syncope, and even death. Option A (Acetaminophen) is
an analgesic and does not interact with sildenafil. Option B (Amlodipine) is a
calcium channel blocker that may have additive hypotensive effects but is not
contraindicated. Option D (NSAIDs) do not have this interaction. This is a well-
known, life-threatening drug interaction that is contraindicated. Patients with
erectile dysfunction who take nitrates should not be prescribed sildenafil.
Question 5: Which pharmacokinetic change is most common in elderly
patients?
A. Increased renal clearance
B. Increased liver enzyme activity
C. Increased body water
D. Decreased renal clearance
Correct Answer: D. Decreased renal clearance
Rationale: Aging decreases renal function, affecting drug clearance. Renal blood
flow and glomerular filtration rate decline with age, leading to decreased clearance
of renally eliminated drugs. Option A is incorrect; renal clearance decreases, not
increases. Option B is incorrect; liver enzyme activity generally decreases with
age. Option C is incorrect; total body water decreases with age, which can affect
the volume of distribution of water-soluble drugs. Age-related changes in
pharmacokinetics include decreased renal clearance, decreased hepatic
metabolism, decreased body water, increased body fat, and decreased serum
albumin. These changes necessitate dose adjustments in elderly patients, especially
for drugs with narrow therapeutic indices.
Question 6: Which of the following drugs is safest for use in pregnancy?
