WGU D116 OBJECTIVE ASSESSMENT FINAL EXAM ADVANCED PHARMACOLOGY
EXAM NEWEST ACTUAL EXAM PREPARATION WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS WITH RATIONALES | ALREADY GRADED A+||BRAND NEW
VERSION!!
Question 1
A patient presents to the emergency department with palpitations and an irregular heartbeat. The
Advanced Practice Registered Nurse (APRN) initiates cardiac monitoring and identifies atrial
fibrillation. The APRN decides to prescribe dofetilide (Tikosyn). What is the correct instruction
regarding the administration of this medication?
A) It must be taken strictly with high-fat meals to ensure absorption.
B) It should be taken only on an empty stomach, at least one hour before meals.
C) It can be taken either with food or on an empty stomach.
D) It must be taken with a full glass of grapefruit juice to increase bioavailability.
E) It should be administered only via the sublingual route during acute episodes.
Correct Answer: C) It can be taken either with food or on an empty stomach.
Rationale: Dofetilide is a Class III antiarrhythmic agent used for the maintenance of normal
sinus rhythm in patients with atrial fibrillation. Its oral bioavailability is high
(approximately 90%) and is not significantly affected by the presence of food in the
gastrointestinal tract. Therefore, for patient convenience and adherence, it is recommended
that the medication be taken regardless of meal timing. However, the patient should be
instructed to avoid grapefruit juice, as it can inhibit the metabolism of many drugs, though
dofetilide’s primary concern is renal clearance and specific drug-drug interactions like
verapamil or cimetidine.
Question 2
A 70-year-old male patient calls the clinic complaining of new-onset chest pain that began during
sexual activity. He reports taking sildenafil (Viagra) 50 mg approximately eight hours ago. He
informs the APRN that he has his "heart pill" (nitroglycerin 0.3 mg) available. What is the most
appropriate response by the APRN?
A) "Take one nitroglycerin tablet now and call 911 if the pain persists after 5 minutes."
B) "Take the nitroglycerin and wait 30 minutes before engaging in further activity."
C) "Do not take the nitroglycerin; call 911 immediately for emergency transport."
, 2
D) "Take the nitroglycerin only if your blood pressure is above 140/90 mmHg."
E) "Wait until 12 hours have passed since the sildenafil dose before taking the nitroglycerin."
Correct Answer: C) Do not take the nitroglycerin; call 911 immediately for emergency
transport.
Rationale: The combination of a phosphodiesterase type 5 (PDE5) inhibitor like sildenafil
and organic nitrates (nitroglycerin) is strictly contraindicated. Both medications increase
cyclic guanosine monophosphate (cGMP) levels, leading to profound systemic vasodilation.
If taken together, this can cause a life-threatening drop in blood pressure, leading to
cardiovascular collapse and myocardial infarction. Because the patient is currently
experiencing active chest pain (angina) and has taken sildenafil within the last 24 hours
(the standard washout period), he must be evaluated in an emergency setting without
taking any nitrates.
Question 3
A patient with a new diagnosis of bipolar disorder is being prepared to start lithium carbonate
therapy. The APRN orders baseline Blood Urea Nitrogen (BUN) and serum creatinine levels.
The patient asks why these tests are necessary. Which explanation is correct?
A) Lithium is metabolized by the liver, and kidney function affects liver enzymes.
B) Lithium can cause an increase in muscle mass, which raises creatinine.
C) Lithium is excreted almost entirely by the kidneys and can decrease renal function over time.
D) Lithium levels are affected by the patient's intake of dietary protein.
E) These tests are used to determine if the patient has a history of gout.
Correct Answer: C) Lithium is excreted almost entirely by the kidneys and can decrease
renal function over time.
Rationale: Lithium has a narrow therapeutic index and is handled by the kidneys similarly
to sodium. Because lithium is excreted unchanged by the kidneys, any impairment in renal
function can lead to lithium accumulation and toxicity. Furthermore, long-term lithium use
is associated with nephrogenic diabetes insipidus and chronic tubulointerstitial
nephropathy. Baseline BUN and creatinine are essential to ensure the kidneys can safely
clear the drug and to monitor for future drug-induced renal decline.
, 3
Question 4
A newly licensed nurse is reviewing the appropriate use of sildenafil (Viagra). Which of the
following patients can safely receive a prescription for this medication?
A) A 68-year-old male with stable angina who uses nitroglycerin spray as needed.
B) A 50-year-old male taking isosorbide mononitrate for coronary artery disease.
C) A 54-year-old male with controlled hypertension, mild eczema, and a history of urolithiasis.
D) A 72-year-old male with a recent myocardial infarction (within 2 weeks).
E) A 45-year-old male with resting hypotension (BP 85/50 mmHg).
Correct Answer: C) A 54-year-old male with controlled hypertension, mild eczema, and a
history of urolithiasis.
Rationale: Sildenafil is safe for patients with well-controlled hypertension and minor
conditions like eczema or past kidney stones (urolithiasis). It is contraindicated in patients
taking any form of nitrates (Options A and B) and should be avoided in patients with recent
cardiovascular events (Option D) or resting hypotension (Option E), as the drug can
further lower blood pressure or trigger cardiac stress.
Question 5
A 30-year-old patient diagnosed with generalized anxiety disorder is prescribed citalopram
(Celexa). The APRN knows that this medication belongs to the Selective Serotonin Reuptake
Inhibitor (SSRI) class. Which statement best describes its primary mechanism of action?
A) It increases the production of serotonin in the presynaptic neuron.
B) It directly stimulates serotonin receptors on the target cell.
C) It influences receptor activity by blocking the reuptake of serotonin, increasing its availability
in the synapse.
D) It prevents the breakdown of norepinephrine in the synaptic cleft.
E) It acts as an antagonist at the GABA-A receptor complex.
Correct Answer: C) It influences receptor activity by blocking the reuptake of serotonin,
increasing its availability in the synapse.
Rationale: SSRIs like citalopram work by inhibiting the serotonin transporter (SERT) on
the presynaptic nerve terminal. By blocking the reuptake of serotonin back into the
, 4
neuron, citalopram increases the concentration of serotonin available in the synaptic cleft
to interact with postsynaptic receptors. This "influences receptor activity on target cells"
by ensuring more neurotransmitter is present to bind to them over a longer period.
Question 6
A patient with Huntington's disease presents with chorea (twitching), dysphagia, and cognitive
decline. The APRN decides to prescribe baclofen to help manage muscle symptoms. What is the
mechanism of action of baclofen in this context?
A) It acts as an agonist at the dopamine D2 receptors.
B) It inhibits the neurotransmitter Gamma-Aminobutyric Acid (GABA).
C) It acts as an agonist at the GABA-B receptors in the spinal cord and brain.
D) It modulates the effects of glutamate at the NMDA receptor site.
E) It increases the synthesis of acetylcholine in the basal ganglia.
Correct Answer: C) It acts as an agonist at the GABA-B receptors in the spinal cord and
brain.
Rationale: Baclofen is a structural analog of the inhibitory neurotransmitter GABA. It
works by mimicking GABA at the GABA-B receptors, which leads to hyperpolarization of
neurons and a reduction in the release of excitatory neurotransmitters (like glutamate).
This results in decreased muscle spasticity and involuntary movements. Huntington's
disease involves a deficiency of GABA and acetylcholine; while baclofen does not cure the
disease, it leverages the GABA system to reduce motor symptoms.
Question 7
A 21-year-old patient experiences a seizure characterized by a sudden loss of consciousness,
followed by a phase of muscle stiffening and then rhythmic jerking of the extremities. Following
the event, the patient experiences deep CNS depression and confusion. Which type of seizure
does this describe?
A) Absence seizure
B) Myoclonic seizure
C) Atonic seizure
EXAM NEWEST ACTUAL EXAM PREPARATION WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS WITH RATIONALES | ALREADY GRADED A+||BRAND NEW
VERSION!!
Question 1
A patient presents to the emergency department with palpitations and an irregular heartbeat. The
Advanced Practice Registered Nurse (APRN) initiates cardiac monitoring and identifies atrial
fibrillation. The APRN decides to prescribe dofetilide (Tikosyn). What is the correct instruction
regarding the administration of this medication?
A) It must be taken strictly with high-fat meals to ensure absorption.
B) It should be taken only on an empty stomach, at least one hour before meals.
C) It can be taken either with food or on an empty stomach.
D) It must be taken with a full glass of grapefruit juice to increase bioavailability.
E) It should be administered only via the sublingual route during acute episodes.
Correct Answer: C) It can be taken either with food or on an empty stomach.
Rationale: Dofetilide is a Class III antiarrhythmic agent used for the maintenance of normal
sinus rhythm in patients with atrial fibrillation. Its oral bioavailability is high
(approximately 90%) and is not significantly affected by the presence of food in the
gastrointestinal tract. Therefore, for patient convenience and adherence, it is recommended
that the medication be taken regardless of meal timing. However, the patient should be
instructed to avoid grapefruit juice, as it can inhibit the metabolism of many drugs, though
dofetilide’s primary concern is renal clearance and specific drug-drug interactions like
verapamil or cimetidine.
Question 2
A 70-year-old male patient calls the clinic complaining of new-onset chest pain that began during
sexual activity. He reports taking sildenafil (Viagra) 50 mg approximately eight hours ago. He
informs the APRN that he has his "heart pill" (nitroglycerin 0.3 mg) available. What is the most
appropriate response by the APRN?
A) "Take one nitroglycerin tablet now and call 911 if the pain persists after 5 minutes."
B) "Take the nitroglycerin and wait 30 minutes before engaging in further activity."
C) "Do not take the nitroglycerin; call 911 immediately for emergency transport."
, 2
D) "Take the nitroglycerin only if your blood pressure is above 140/90 mmHg."
E) "Wait until 12 hours have passed since the sildenafil dose before taking the nitroglycerin."
Correct Answer: C) Do not take the nitroglycerin; call 911 immediately for emergency
transport.
Rationale: The combination of a phosphodiesterase type 5 (PDE5) inhibitor like sildenafil
and organic nitrates (nitroglycerin) is strictly contraindicated. Both medications increase
cyclic guanosine monophosphate (cGMP) levels, leading to profound systemic vasodilation.
If taken together, this can cause a life-threatening drop in blood pressure, leading to
cardiovascular collapse and myocardial infarction. Because the patient is currently
experiencing active chest pain (angina) and has taken sildenafil within the last 24 hours
(the standard washout period), he must be evaluated in an emergency setting without
taking any nitrates.
Question 3
A patient with a new diagnosis of bipolar disorder is being prepared to start lithium carbonate
therapy. The APRN orders baseline Blood Urea Nitrogen (BUN) and serum creatinine levels.
The patient asks why these tests are necessary. Which explanation is correct?
A) Lithium is metabolized by the liver, and kidney function affects liver enzymes.
B) Lithium can cause an increase in muscle mass, which raises creatinine.
C) Lithium is excreted almost entirely by the kidneys and can decrease renal function over time.
D) Lithium levels are affected by the patient's intake of dietary protein.
E) These tests are used to determine if the patient has a history of gout.
Correct Answer: C) Lithium is excreted almost entirely by the kidneys and can decrease
renal function over time.
Rationale: Lithium has a narrow therapeutic index and is handled by the kidneys similarly
to sodium. Because lithium is excreted unchanged by the kidneys, any impairment in renal
function can lead to lithium accumulation and toxicity. Furthermore, long-term lithium use
is associated with nephrogenic diabetes insipidus and chronic tubulointerstitial
nephropathy. Baseline BUN and creatinine are essential to ensure the kidneys can safely
clear the drug and to monitor for future drug-induced renal decline.
, 3
Question 4
A newly licensed nurse is reviewing the appropriate use of sildenafil (Viagra). Which of the
following patients can safely receive a prescription for this medication?
A) A 68-year-old male with stable angina who uses nitroglycerin spray as needed.
B) A 50-year-old male taking isosorbide mononitrate for coronary artery disease.
C) A 54-year-old male with controlled hypertension, mild eczema, and a history of urolithiasis.
D) A 72-year-old male with a recent myocardial infarction (within 2 weeks).
E) A 45-year-old male with resting hypotension (BP 85/50 mmHg).
Correct Answer: C) A 54-year-old male with controlled hypertension, mild eczema, and a
history of urolithiasis.
Rationale: Sildenafil is safe for patients with well-controlled hypertension and minor
conditions like eczema or past kidney stones (urolithiasis). It is contraindicated in patients
taking any form of nitrates (Options A and B) and should be avoided in patients with recent
cardiovascular events (Option D) or resting hypotension (Option E), as the drug can
further lower blood pressure or trigger cardiac stress.
Question 5
A 30-year-old patient diagnosed with generalized anxiety disorder is prescribed citalopram
(Celexa). The APRN knows that this medication belongs to the Selective Serotonin Reuptake
Inhibitor (SSRI) class. Which statement best describes its primary mechanism of action?
A) It increases the production of serotonin in the presynaptic neuron.
B) It directly stimulates serotonin receptors on the target cell.
C) It influences receptor activity by blocking the reuptake of serotonin, increasing its availability
in the synapse.
D) It prevents the breakdown of norepinephrine in the synaptic cleft.
E) It acts as an antagonist at the GABA-A receptor complex.
Correct Answer: C) It influences receptor activity by blocking the reuptake of serotonin,
increasing its availability in the synapse.
Rationale: SSRIs like citalopram work by inhibiting the serotonin transporter (SERT) on
the presynaptic nerve terminal. By blocking the reuptake of serotonin back into the
, 4
neuron, citalopram increases the concentration of serotonin available in the synaptic cleft
to interact with postsynaptic receptors. This "influences receptor activity on target cells"
by ensuring more neurotransmitter is present to bind to them over a longer period.
Question 6
A patient with Huntington's disease presents with chorea (twitching), dysphagia, and cognitive
decline. The APRN decides to prescribe baclofen to help manage muscle symptoms. What is the
mechanism of action of baclofen in this context?
A) It acts as an agonist at the dopamine D2 receptors.
B) It inhibits the neurotransmitter Gamma-Aminobutyric Acid (GABA).
C) It acts as an agonist at the GABA-B receptors in the spinal cord and brain.
D) It modulates the effects of glutamate at the NMDA receptor site.
E) It increases the synthesis of acetylcholine in the basal ganglia.
Correct Answer: C) It acts as an agonist at the GABA-B receptors in the spinal cord and
brain.
Rationale: Baclofen is a structural analog of the inhibitory neurotransmitter GABA. It
works by mimicking GABA at the GABA-B receptors, which leads to hyperpolarization of
neurons and a reduction in the release of excitatory neurotransmitters (like glutamate).
This results in decreased muscle spasticity and involuntary movements. Huntington's
disease involves a deficiency of GABA and acetylcholine; while baclofen does not cure the
disease, it leverages the GABA system to reduce motor symptoms.
Question 7
A 21-year-old patient experiences a seizure characterized by a sudden loss of consciousness,
followed by a phase of muscle stiffening and then rhythmic jerking of the extremities. Following
the event, the patient experiences deep CNS depression and confusion. Which type of seizure
does this describe?
A) Absence seizure
B) Myoclonic seizure
C) Atonic seizure
