Comprehensive Prototype Drug Mastery
Examination: Pharmacology Made Easy
152 Multiple-Choice Questions with In-
Depth Rationales
Section 1: Autonomic Nervous System (Cholinergic & Adrenergic)
1. A patient is prescribed bethanechol for urinary retention. Which assessment finding
would indicate a therapeutic effect?
A) Decreased blood pressure
B) Increased heart rate
C) Voiding of 300 mL of urine
D) Pupil dilation
CORRECT ANSWER: C
Rationale: Bethanechol is a direct-acting cholinergic agonist that stimulates muscarinic
receptors, causing detrusor muscle contraction and sphincter relaxation, which
promotes bladder emptying. Option A is a side effect (hypotension), B is an effect of
anticholinergics or adrenergics, and D is a sympathetic response (mydriasis).
2. A nurse is preparing to administer atropine. Which of the following is a
contraindication to this medication?
A) Sinus bradycardia
B) Glaucoma
C) Peptic ulcer disease
D) Organophosphate poisoning
CORRECT ANSWER: B
,Rationale: Atropine is an anticholinergic agent that causes mydriasis (pupil dilation) and
cycloplegia, which can increase intraocular pressure. This is dangerous in patients with
glaucoma. It is used for bradycardia (A) and peptic ulcers (C) as an adjunct, and as an
antidote for organophosphate poisoning (D).
3. A patient on donepezil for Alzheimer's disease is experiencing nausea and diarrhea.
The nurse understands this is due to which mechanism of action?
A) Blockade of acetylcholine receptors
B) Increased breakdown of acetylcholine
C) Inhibition of acetylcholinesterase
D) Stimulation of norepinephrine release
CORRECT ANSWER: C
Rationale: Donepezil is a cholinesterase inhibitor. By blocking the enzyme
acetylcholinesterase, it increases the concentration of acetylcholine in the synaptic
cleft. The resulting overstimulation of muscarinic receptors in the GI tract leads to side
effects like nausea, vomiting, and diarrhea.
4. Epinephrine is administered to a patient in anaphylactic shock. The nurse expects
which primary therapeutic effect?
A) Bronchodilation and increased cardiac output
B) Decreased heart rate and decreased contractility
C) Vasoconstriction and decreased blood pressure
D) Miosis and increased GI motility
CORRECT ANSWER: A
Rationale: Epinephrine is a non-selective adrenergic agonist (alpha-1, beta-1, beta-2).
The therapeutic effect in anaphylaxis is beta-2 mediated bronchodilation and beta-1
mediated positive inotropic and chronotropic effects to support blood pressure. Alpha-
1 effects cause vasoconstriction to counteract hypotension.
5. A patient with asthma is prescribed albuterol. The nurse explains that the medication
works by:
A) Blocking beta-1 receptors in the heart.
B) Stimulating beta-2 receptors in the lungs.
,C) Blocking alpha-1 receptors in blood vessels.
D) Stimulating muscarinic receptors in the airways.
CORRECT ANSWER: B
Rationale: Albuterol is a short-acting beta-2 adrenergic agonist. It selectively binds to
beta-2 receptors in the bronchial smooth muscle, causing relaxation and
bronchodilation. It has minimal effect on beta-1 receptors (heart) at therapeutic doses.
6. A patient on propranolol for hypertension reports cold hands and feet. The nurse
recognizes this is due to:
A) Beta-1 receptor blockade in the heart.
B) Beta-2 receptor blockade in peripheral blood vessels.
C) Alpha-1 receptor blockade.
D) Unopposed alpha-1 receptor stimulation.
CORRECT ANSWER: D
Rationale: Propranolol is a non-selective beta-blocker (blocks beta-1 and beta-2).
Blocking beta-2 receptors in peripheral vasculature removes vasodilatory influences,
leaving alpha-1 vasoconstrictor effects unopposed. This leads to reduced peripheral
circulation and cold extremities.
7. Which medication is a direct-acting alpha-1 agonist used for nasal congestion?
A) Phenylephrine
B) Pseudoephedrine
C) Epinephrine
D) Salmeterol
CORRECT ANSWER: A
Rationale: Phenylephrine is a direct-acting alpha-1 adrenergic agonist that causes
vasoconstriction of nasal blood vessels, reducing congestion. Pseudoephedrine (B) is an
indirect-acting agonist. Epinephrine (C) is non-selective. Salmeterol (D) is a beta-2
agonist.
8. A patient receiving IV dobutamine is being monitored for therapeutic effect. Which
assessment finding indicates the drug is effective?
, A) Decreased heart rate
B) Increased cardiac output
C) Decreased urinary output
D) Peripheral vasoconstriction
CORRECT ANSWER: B
Rationale: Dobutamine is a beta-1 selective adrenergic agonist that increases
myocardial contractility. The primary therapeutic goal is to increase cardiac output in
patients with heart failure. It does not primarily decrease heart rate (A).
9. A nurse is administering neostigmine for myasthenia gravis. What is the primary
mechanism of action of this drug?
A) It blocks acetylcholine release.
B) It stimulates the release of norepinephrine.
C) It inhibits acetylcholinesterase.
D) It blocks nicotinic receptors.
CORRECT ANSWER: C
Rationale: Neostigmine is a reversible cholinesterase inhibitor. It prevents the breakdown
of acetylcholine, making more available at the neuromuscular junction to stimulate
nicotinic receptors and improve muscle strength. This is the standard treatment for
myasthenia gravis.
10. A patient is prescribed tamsulosin for benign prostatic hyperplasia (BPH). The nurse
understands this drug works by:
A) Stimulating beta-2 receptors to relax the bladder.
B) Blocking alpha-1 receptors in the prostate and bladder neck.
C) Inhibiting the conversion of testosterone to dihydrotestosterone.
D) Blocking muscarinic receptors to decrease detrusor tone.
CORRECT ANSWER: B
Rationale: Tamsulosin is an alpha-1 adrenergic blocker. It selectively blocks alpha-1A
receptors in the prostate and bladder neck, causing smooth muscle relaxation. This
improves urine flow and reduces symptoms of BPH.
Examination: Pharmacology Made Easy
152 Multiple-Choice Questions with In-
Depth Rationales
Section 1: Autonomic Nervous System (Cholinergic & Adrenergic)
1. A patient is prescribed bethanechol for urinary retention. Which assessment finding
would indicate a therapeutic effect?
A) Decreased blood pressure
B) Increased heart rate
C) Voiding of 300 mL of urine
D) Pupil dilation
CORRECT ANSWER: C
Rationale: Bethanechol is a direct-acting cholinergic agonist that stimulates muscarinic
receptors, causing detrusor muscle contraction and sphincter relaxation, which
promotes bladder emptying. Option A is a side effect (hypotension), B is an effect of
anticholinergics or adrenergics, and D is a sympathetic response (mydriasis).
2. A nurse is preparing to administer atropine. Which of the following is a
contraindication to this medication?
A) Sinus bradycardia
B) Glaucoma
C) Peptic ulcer disease
D) Organophosphate poisoning
CORRECT ANSWER: B
,Rationale: Atropine is an anticholinergic agent that causes mydriasis (pupil dilation) and
cycloplegia, which can increase intraocular pressure. This is dangerous in patients with
glaucoma. It is used for bradycardia (A) and peptic ulcers (C) as an adjunct, and as an
antidote for organophosphate poisoning (D).
3. A patient on donepezil for Alzheimer's disease is experiencing nausea and diarrhea.
The nurse understands this is due to which mechanism of action?
A) Blockade of acetylcholine receptors
B) Increased breakdown of acetylcholine
C) Inhibition of acetylcholinesterase
D) Stimulation of norepinephrine release
CORRECT ANSWER: C
Rationale: Donepezil is a cholinesterase inhibitor. By blocking the enzyme
acetylcholinesterase, it increases the concentration of acetylcholine in the synaptic
cleft. The resulting overstimulation of muscarinic receptors in the GI tract leads to side
effects like nausea, vomiting, and diarrhea.
4. Epinephrine is administered to a patient in anaphylactic shock. The nurse expects
which primary therapeutic effect?
A) Bronchodilation and increased cardiac output
B) Decreased heart rate and decreased contractility
C) Vasoconstriction and decreased blood pressure
D) Miosis and increased GI motility
CORRECT ANSWER: A
Rationale: Epinephrine is a non-selective adrenergic agonist (alpha-1, beta-1, beta-2).
The therapeutic effect in anaphylaxis is beta-2 mediated bronchodilation and beta-1
mediated positive inotropic and chronotropic effects to support blood pressure. Alpha-
1 effects cause vasoconstriction to counteract hypotension.
5. A patient with asthma is prescribed albuterol. The nurse explains that the medication
works by:
A) Blocking beta-1 receptors in the heart.
B) Stimulating beta-2 receptors in the lungs.
,C) Blocking alpha-1 receptors in blood vessels.
D) Stimulating muscarinic receptors in the airways.
CORRECT ANSWER: B
Rationale: Albuterol is a short-acting beta-2 adrenergic agonist. It selectively binds to
beta-2 receptors in the bronchial smooth muscle, causing relaxation and
bronchodilation. It has minimal effect on beta-1 receptors (heart) at therapeutic doses.
6. A patient on propranolol for hypertension reports cold hands and feet. The nurse
recognizes this is due to:
A) Beta-1 receptor blockade in the heart.
B) Beta-2 receptor blockade in peripheral blood vessels.
C) Alpha-1 receptor blockade.
D) Unopposed alpha-1 receptor stimulation.
CORRECT ANSWER: D
Rationale: Propranolol is a non-selective beta-blocker (blocks beta-1 and beta-2).
Blocking beta-2 receptors in peripheral vasculature removes vasodilatory influences,
leaving alpha-1 vasoconstrictor effects unopposed. This leads to reduced peripheral
circulation and cold extremities.
7. Which medication is a direct-acting alpha-1 agonist used for nasal congestion?
A) Phenylephrine
B) Pseudoephedrine
C) Epinephrine
D) Salmeterol
CORRECT ANSWER: A
Rationale: Phenylephrine is a direct-acting alpha-1 adrenergic agonist that causes
vasoconstriction of nasal blood vessels, reducing congestion. Pseudoephedrine (B) is an
indirect-acting agonist. Epinephrine (C) is non-selective. Salmeterol (D) is a beta-2
agonist.
8. A patient receiving IV dobutamine is being monitored for therapeutic effect. Which
assessment finding indicates the drug is effective?
, A) Decreased heart rate
B) Increased cardiac output
C) Decreased urinary output
D) Peripheral vasoconstriction
CORRECT ANSWER: B
Rationale: Dobutamine is a beta-1 selective adrenergic agonist that increases
myocardial contractility. The primary therapeutic goal is to increase cardiac output in
patients with heart failure. It does not primarily decrease heart rate (A).
9. A nurse is administering neostigmine for myasthenia gravis. What is the primary
mechanism of action of this drug?
A) It blocks acetylcholine release.
B) It stimulates the release of norepinephrine.
C) It inhibits acetylcholinesterase.
D) It blocks nicotinic receptors.
CORRECT ANSWER: C
Rationale: Neostigmine is a reversible cholinesterase inhibitor. It prevents the breakdown
of acetylcholine, making more available at the neuromuscular junction to stimulate
nicotinic receptors and improve muscle strength. This is the standard treatment for
myasthenia gravis.
10. A patient is prescribed tamsulosin for benign prostatic hyperplasia (BPH). The nurse
understands this drug works by:
A) Stimulating beta-2 receptors to relax the bladder.
B) Blocking alpha-1 receptors in the prostate and bladder neck.
C) Inhibiting the conversion of testosterone to dihydrotestosterone.
D) Blocking muscarinic receptors to decrease detrusor tone.
CORRECT ANSWER: B
Rationale: Tamsulosin is an alpha-1 adrenergic blocker. It selectively blocks alpha-1A
receptors in the prostate and bladder neck, causing smooth muscle relaxation. This
improves urine flow and reduces symptoms of BPH.
