WGU D345 PSYCHOPHARMACOLOGY (OA)
OBJECTIVE ASSESSMENT ACTUAL EXAM
QUESTIONS AND CORRECT VERIFIED ANSWERS
WITH RATIONALES 100% GUARANTEED PASS!!
<LATEST VERSION>
1. A patient with major depressive disorder is prescribed an SSRI. Which
pharmacodynamic action best explains the medication’s primary therapeutic
effect?
A. Blocking dopamine D2 receptors in the mesolimbic pathway
B. Inhibiting serotonin reuptake at the presynaptic neuron
C. Increasing acetylcholine release in the hippocampus
D. Stimulating gamma-aminobutyric acid (GABA) receptors directly
Answer: B
Rationale: SSRIs primarily inhibit the serotonin transporter, decreasing reuptake
of serotonin into the presynaptic neuron and increasing serotonin availability in the
synaptic cleft. Their therapeutic effects develop over time as downstream neuronal
adaptations occur.
,2. A psychiatric mental health nurse practitioner is reviewing a patient's response
to medication. Which statement best distinguishes pharmacokinetics from
pharmacodynamics?
A. Pharmacokinetics describes receptor binding, whereas pharmacodynamics
describes renal elimination.
B. Pharmacokinetics describes what the drug does to the body, whereas
pharmacodynamics describes what the body does to the drug.
C. Pharmacokinetics describes absorption, distribution, metabolism, and excretion,
whereas pharmacodynamics describes the drug’s effects on biological targets.
D. Pharmacokinetics and pharmacodynamics are interchangeable terms describing
medication response.
Answer: C
Rationale: Pharmacokinetics refers to what the body does to a medication,
including absorption, distribution, metabolism, and excretion. Pharmacodynamics
describes what the medication does to the body, including receptor interactions and
physiologic effects.
3. A patient taking sertraline for depression reports that mood has improved, but
after starting a new over-the-counter product develops agitation, diaphoresis,
diarrhea, tremor, and hyperreflexia. Which action is the priority?
A. Reassure the patient that these findings are expected early SSRI effects.
B. Recommend increasing the sertraline dose because the medication is not yet
fully effective.
C. Evaluate urgently for serotonin toxicity and review all serotonergic substances
being taken.
D. Instruct the patient to take sertraline at bedtime instead of in the morning.
Answer: C
Rationale: Agitation, autonomic instability, gastrointestinal symptoms, tremor,
and hyperreflexia strongly suggest serotonin toxicity, particularly when a second
serotonergic agent may have been added. Prompt recognition and medication
review are essential because severe toxicity can become life-threatening.
,4. A patient is started on an SNRI for generalized anxiety disorder. Which
additional finding should the clinician monitor because it may become clinically
significant with some SNRIs?
A. Persistent hypotension caused by cholinergic blockade
B. Increased blood pressure associated with enhanced norepinephrine activity
C. Severe neutropenia caused by bone marrow suppression
D. Profound hypoglycemia caused by increased insulin secretion
Answer: B
Rationale: SNRIs increase serotonergic and, depending on the agent and dose,
noradrenergic neurotransmission. Increased norepinephrine activity can contribute
to elevated blood pressure and heart rate, making cardiovascular monitoring
clinically relevant.
5. A patient taking lithium reports several days of vomiting and diarrhea during an
acute gastrointestinal illness. The patient is also taking less fluid than usual. What
is the most appropriate concern?
A. Reduced lithium absorption causing treatment failure
B. Increased lithium clearance causing subtherapeutic concentrations
C. Lithium accumulation caused by volume depletion and altered renal handling
D. Immediate development of serotonin syndrome
Answer: C
Rationale: Lithium is primarily excreted by the kidneys, and its handling is closely
related to sodium and fluid balance. Dehydration and volume depletion can
increase renal reabsorption of lithium and raise serum concentrations, increasing
the risk of toxicity.
, 6. A patient taking lithium has a serum concentration above the therapeutic range
and presents with coarse tremor, vomiting, ataxia, and slurred speech. Which
finding most strongly supports clinically significant lithium toxicity rather than a
mild expected adverse effect?
A. Mild thirst
B. Fine hand tremor
C. Ataxia and slurred speech
D. Increased urinary frequency
Answer: C
Rationale: Fine tremor, thirst, and polyuria may occur during lithium therapy and
are not necessarily signs of severe toxicity. Neurologic findings such as ataxia,
dysarthria, confusion, and severe tremor suggest clinically significant toxicity and
require urgent evaluation.
7. Before initiating lithium therapy in a patient with bipolar disorder, which
baseline assessment is most important because it directly affects safe long-term
management?
A. Serum creatinine and thyroid function
B. Serum amylase and lipase only
C. Bilirubin and alkaline phosphatase only
D. Peak expiratory flow rate
Answer: A
Rationale: Lithium can affect renal function and thyroid function, so baseline
renal and thyroid assessment is essential. Ongoing monitoring helps identify
treatment-related complications before they become clinically significant.
OBJECTIVE ASSESSMENT ACTUAL EXAM
QUESTIONS AND CORRECT VERIFIED ANSWERS
WITH RATIONALES 100% GUARANTEED PASS!!
<LATEST VERSION>
1. A patient with major depressive disorder is prescribed an SSRI. Which
pharmacodynamic action best explains the medication’s primary therapeutic
effect?
A. Blocking dopamine D2 receptors in the mesolimbic pathway
B. Inhibiting serotonin reuptake at the presynaptic neuron
C. Increasing acetylcholine release in the hippocampus
D. Stimulating gamma-aminobutyric acid (GABA) receptors directly
Answer: B
Rationale: SSRIs primarily inhibit the serotonin transporter, decreasing reuptake
of serotonin into the presynaptic neuron and increasing serotonin availability in the
synaptic cleft. Their therapeutic effects develop over time as downstream neuronal
adaptations occur.
,2. A psychiatric mental health nurse practitioner is reviewing a patient's response
to medication. Which statement best distinguishes pharmacokinetics from
pharmacodynamics?
A. Pharmacokinetics describes receptor binding, whereas pharmacodynamics
describes renal elimination.
B. Pharmacokinetics describes what the drug does to the body, whereas
pharmacodynamics describes what the body does to the drug.
C. Pharmacokinetics describes absorption, distribution, metabolism, and excretion,
whereas pharmacodynamics describes the drug’s effects on biological targets.
D. Pharmacokinetics and pharmacodynamics are interchangeable terms describing
medication response.
Answer: C
Rationale: Pharmacokinetics refers to what the body does to a medication,
including absorption, distribution, metabolism, and excretion. Pharmacodynamics
describes what the medication does to the body, including receptor interactions and
physiologic effects.
3. A patient taking sertraline for depression reports that mood has improved, but
after starting a new over-the-counter product develops agitation, diaphoresis,
diarrhea, tremor, and hyperreflexia. Which action is the priority?
A. Reassure the patient that these findings are expected early SSRI effects.
B. Recommend increasing the sertraline dose because the medication is not yet
fully effective.
C. Evaluate urgently for serotonin toxicity and review all serotonergic substances
being taken.
D. Instruct the patient to take sertraline at bedtime instead of in the morning.
Answer: C
Rationale: Agitation, autonomic instability, gastrointestinal symptoms, tremor,
and hyperreflexia strongly suggest serotonin toxicity, particularly when a second
serotonergic agent may have been added. Prompt recognition and medication
review are essential because severe toxicity can become life-threatening.
,4. A patient is started on an SNRI for generalized anxiety disorder. Which
additional finding should the clinician monitor because it may become clinically
significant with some SNRIs?
A. Persistent hypotension caused by cholinergic blockade
B. Increased blood pressure associated with enhanced norepinephrine activity
C. Severe neutropenia caused by bone marrow suppression
D. Profound hypoglycemia caused by increased insulin secretion
Answer: B
Rationale: SNRIs increase serotonergic and, depending on the agent and dose,
noradrenergic neurotransmission. Increased norepinephrine activity can contribute
to elevated blood pressure and heart rate, making cardiovascular monitoring
clinically relevant.
5. A patient taking lithium reports several days of vomiting and diarrhea during an
acute gastrointestinal illness. The patient is also taking less fluid than usual. What
is the most appropriate concern?
A. Reduced lithium absorption causing treatment failure
B. Increased lithium clearance causing subtherapeutic concentrations
C. Lithium accumulation caused by volume depletion and altered renal handling
D. Immediate development of serotonin syndrome
Answer: C
Rationale: Lithium is primarily excreted by the kidneys, and its handling is closely
related to sodium and fluid balance. Dehydration and volume depletion can
increase renal reabsorption of lithium and raise serum concentrations, increasing
the risk of toxicity.
, 6. A patient taking lithium has a serum concentration above the therapeutic range
and presents with coarse tremor, vomiting, ataxia, and slurred speech. Which
finding most strongly supports clinically significant lithium toxicity rather than a
mild expected adverse effect?
A. Mild thirst
B. Fine hand tremor
C. Ataxia and slurred speech
D. Increased urinary frequency
Answer: C
Rationale: Fine tremor, thirst, and polyuria may occur during lithium therapy and
are not necessarily signs of severe toxicity. Neurologic findings such as ataxia,
dysarthria, confusion, and severe tremor suggest clinically significant toxicity and
require urgent evaluation.
7. Before initiating lithium therapy in a patient with bipolar disorder, which
baseline assessment is most important because it directly affects safe long-term
management?
A. Serum creatinine and thyroid function
B. Serum amylase and lipase only
C. Bilirubin and alkaline phosphatase only
D. Peak expiratory flow rate
Answer: A
Rationale: Lithium can affect renal function and thyroid function, so baseline
renal and thyroid assessment is essential. Ongoing monitoring helps identify
treatment-related complications before they become clinically significant.
