WGU D120 – Special Populations Primary Care for
the Advanced Practice Nurse | Post-Master's
Certificate in Nursing – Family Nurse Practitioner
(Post-MSN) Original Practice Questions & Answers
| Comprehensive WGU D120 Study Guide &
Assessment Preparation | Special Populations
Primary Care, Advanced Practice Nursing, Health
Promotion, Disease Prevention, Diagnosis &
Management, Care Coordination, Patient & Family
Education, Clinical Reasoning & Detailed Rationales
Question 1: A 65-year-old male patient with a history of hypertension and type
2 diabetes presents for a routine physical. His current medications include
lisinopril 20 mg daily and metformin 1000 mg twice daily. His blood pressure
today is 132/78 mmHg, and his HbA1c is 7.2%. According to the American
Diabetes Association (ADA) standards of care, what is the most appropriate
next step in managing this patient's hypertension?
A. Add amlodipine 5 mg daily to achieve a target BP of <130/80 mmHg.
B. Increase lisinopril to 40 mg daily.
C. Add hydrochlorothiazide 12.5 mg daily.
D. Continue current regimen as BP and HbA1c are at goal.
CORRECT ANSWER: A. Add amlodipine 5 mg daily to achieve a target BP of
<130/80 mmHg.
Rationale: The ADA recommends a blood pressure target of <130/80 mmHg for most
patients with diabetes. With a current BP of 132/78, this patient is above goal. The first-
line agent for hypertension in diabetes is an ACE inhibitor (lisinopril) or ARB. If the
patient is already on a maximum or near-maximum dose of an ACE inhibitor and BP
remains above target, the next step is to add a calcium channel blocker (e.g.,
amlodipine) or a thiazide diuretic. Since lisinopril 20 mg is a moderate dose and not at
its maximum (40 mg), one could increase it; however, the most appropriate next step per
ADA guidelines, especially when already on an ACE inhibitor, is to add a second agent
rather than increase the ACE inhibitor to its maximum, as combination therapy is often
more effective. Amlodipine is the preferred add-on agent.
Question 2: A 45-year-old female presents with complaints of fatigue, weight
gain, cold intolerance, and constipation over the past 6 months. Her vital signs
are stable. Physical examination reveals a dry, pale complexion and
bradycardia at 52 bpm. Laboratory results show TSH > 20 mIU/L (ref 0.5-5.0)
and free T4 < 0.5 ng/dL (ref 0.8-1.8). The patient is started on levothyroxine
50 mcg daily. What is the most important patient education point regarding
this medication?
,A. Take the medication with food to reduce gastric upset.
B. The medication can be taken at any time of day, as long as it is consistent.
C. Take the medication on an empty stomach, 30-60 minutes before breakfast, and avoid
calcium or iron supplements within 4 hours.
D. If a dose is missed, double the dose the next day.
CORRECT ANSWER: C. Take the medication on an empty stomach, 30-60
minutes before breakfast, and avoid calcium or iron supplements within 4
hours.
Rationale: Levothyroxine absorption is significantly affected by food, as well as by
calcium, iron, and certain other medications. To ensure maximal and consistent
absorption, it must be taken on an empty stomach, 30-60 minutes before the first meal
of the day. Patients should avoid co-administration with calcium or iron supplements
within 4 hours of taking levothyroxine. Taking it with food (Option A) decreases
absorption. It should be taken at the same time each day, but that time must be in the
morning on an empty stomach, not just any consistent time (Option B). Doubling a
missed dose (Option D) is unsafe and can cause hyperthyroid symptoms.
Question 3: A 72-year-old male with a history of coronary artery disease and
heart failure with reduced ejection fraction (HFrEF) presents to the clinic with
worsening dyspnea on exertion and lower extremity edema. His current
medications include carvedilol 25 mg twice daily, lisinopril 20 mg daily, and
furosemide 40 mg daily. His ejection fraction is 30%. What is the most
appropriate addition to his regimen to improve mortality and reduce
hospitalizations?
A. Digoxin 0.125 mg daily.
B. Spironolactone 25 mg daily.
C. Hydralazine and isosorbide dinitrate combination.
D. Diltiazem extended-release 120 mg daily.
CORRECT ANSWER: B. Spironolactone 25 mg daily.
Rationale: The patient has HFrEF and is already on guideline-directed medical therapy
(GDMT) with a beta-blocker (carvedilol) and an ACE inhibitor (lisinopril). The next step
in GDMT for a patient with persistent NYHA class II-IV symptoms and an ejection
fraction ≤35% is to add a mineralocorticoid receptor antagonist (MRA), such as
spironolactone or eplerenone. This has been shown to reduce mortality and
hospitalizations. Digoxin (Option A) can be used for symptom control or rate control in
atrial fibrillation but does not have a mortality benefit. Hydralazine and isosorbide
dinitrate (Option C) are indicated in African American patients or those who cannot
tolerate ACE inhibitors/ARBs. Diltiazem (Option D) is a calcium channel blocker and is
contraindicated in HFrEF due to its negative inotropic effects.
,Question 4: A 38-year-old female presents with a chief complaint of headaches
that have been occurring for the past two weeks. She describes them as severe,
throbbing, and unilateral, often accompanied by nausea and photophobia. She
had a similar episode three months ago. She is otherwise healthy and takes no
regular medications. Her neurological exam is normal. What is the most
appropriate initial treatment for an acute episode of this type of headache?
A. Ibuprofen 400 mg orally.
B. Sumatriptan 50 mg orally.
C. Propranolol 40 mg twice daily.
D. Acetaminophen 650 mg orally.
CORRECT ANSWER: B. Sumatriptan 50 mg orally.
Rationale: The patient's symptoms are classic for a migraine headache (unilateral,
throbbing, with nausea and photophobia). For an acute migraine attack in a patient
without contraindications, a triptan (e.g., sumatriptan) is a first-line specific therapy,
especially if the headache is moderate to severe. Ibuprofen and acetaminophen (Options
A and D) are first-line for mild headaches or as adjuncts, but sumatriptan is more
specific and effective for moderate-to-severe migraines. Propranolol (Option C) is a
prophylactic treatment used to reduce the frequency of migraines, not for acute
treatment of an episode.
Question 5: A 60-year-old male with a 40-pack-year smoking history presents
with a chronic cough, hemoptysis, and weight loss. A chest X-ray shows a right
hilar mass. A CT-guided biopsy confirms non-small cell lung cancer. Which of
the following is the most important prognostic factor that will guide initial
treatment decisions?
A. The patient's age.
B. The patient's performance status.
C. The specific histological subtype (e.g., adenocarcinoma vs. squamous).
D. The TNM stage of the cancer.
CORRECT ANSWER: D. The TNM stage of the cancer.
Rationale: The TNM (Tumor, Node, Metastasis) staging system is the most critical
prognostic factor and the primary determinant of treatment options for non-small cell
lung cancer. Stage I or II disease is often treated with surgery, while stage III may
involve a combination of chemotherapy, radiation, and/or surgery, and stage IV is
typically managed with systemic therapy (chemotherapy, targeted therapy, or
immunotherapy). While age, performance status, and histological subtype are all
important considerations in treatment planning, the stage of the cancer is the
overarching factor that dictates the initial treatment approach and provides the most
significant prognostic information.
, Question 6: A 55-year-old female with a history of osteoarthritis presents with
a chief complaint of acute-onset, severe pain, swelling, and redness in her
right great toe. She denies any trauma. She has no significant past medical
history. On examination, the joint is warm, erythematous, and exquisitely
tender. Which of the following is the most appropriate initial pharmacologic
treatment for this acute condition?
A. Allopurinol 300 mg daily.
B. Colchicine 0.6 mg followed by 0.6 mg one hour later, then daily.
C. Prednisone 20 mg daily.
D. Febuxostat 40 mg daily.
CORRECT ANSWER: B. Colchicine 0.6 mg followed by 0.6 mg one hour later,
then daily.
Rationale: The patient's presentation is classic for an acute gout flare. The first-line
treatments for an acute flare include NSAIDs, colchicine, or corticosteroids. Colchicine
is a highly effective option when started within 24-36 hours of symptom onset. The
recommended dosing is a loading dose of 1.2 mg (two 0.6 mg tablets) followed by 0.6
mg one hour later (Option B's dosing is the standard for acute flare). Allopurinol and
febuxostat (Options A and D) are urate-lowering therapies used for chronic management
of hyperuricemia to prevent future flares, not for the acute flare itself. Prednisone
(Option C) is an option but is often used if colchicine or NSAIDs are contraindicated or
ineffective.
Question 7: A 70-year-old male with a history of hypertension and benign
prostatic hyperplasia presents with a new onset of confusion and lethargy over
the past two days. His family reports he has had a poor appetite and has been
drinking less fluid. His current medications include lisinopril 40 mg daily and
tamsulosin 0.4 mg daily. His laboratory results show sodium 128 mEq/L,
potassium 5.5 mEq/L, BUN 36 mg/dL, and creatinine 1.6 mg/dL. Which of the
following is the most likely cause of his hyponatremia?
A. Medication-induced (ACE inhibitor).
B. Syndrome of Inappropriate Antidiuretic Hormone (SIADH).
C. Hypovolemic hyponatremia.
D. Hypervolemic hyponatremia from heart failure.
CORRECT ANSWER: C. Hypovolemic hyponatremia.
Rationale: The patient's presentation includes hypovolemic symptoms (poor appetite,
decreased fluid intake) and laboratory findings of elevated BUN and creatinine,
indicating prerenal azotemia. His potassium is also elevated, which is more consistent
with hypovolemia (leading to decreased renal perfusion and decreased aldosterone
effect) rather than SIADH (which typically presents with low or normal potassium). ACE
inhibitors (lisinopril) can cause hyperkalemia but are less likely to be the primary cause
the Advanced Practice Nurse | Post-Master's
Certificate in Nursing – Family Nurse Practitioner
(Post-MSN) Original Practice Questions & Answers
| Comprehensive WGU D120 Study Guide &
Assessment Preparation | Special Populations
Primary Care, Advanced Practice Nursing, Health
Promotion, Disease Prevention, Diagnosis &
Management, Care Coordination, Patient & Family
Education, Clinical Reasoning & Detailed Rationales
Question 1: A 65-year-old male patient with a history of hypertension and type
2 diabetes presents for a routine physical. His current medications include
lisinopril 20 mg daily and metformin 1000 mg twice daily. His blood pressure
today is 132/78 mmHg, and his HbA1c is 7.2%. According to the American
Diabetes Association (ADA) standards of care, what is the most appropriate
next step in managing this patient's hypertension?
A. Add amlodipine 5 mg daily to achieve a target BP of <130/80 mmHg.
B. Increase lisinopril to 40 mg daily.
C. Add hydrochlorothiazide 12.5 mg daily.
D. Continue current regimen as BP and HbA1c are at goal.
CORRECT ANSWER: A. Add amlodipine 5 mg daily to achieve a target BP of
<130/80 mmHg.
Rationale: The ADA recommends a blood pressure target of <130/80 mmHg for most
patients with diabetes. With a current BP of 132/78, this patient is above goal. The first-
line agent for hypertension in diabetes is an ACE inhibitor (lisinopril) or ARB. If the
patient is already on a maximum or near-maximum dose of an ACE inhibitor and BP
remains above target, the next step is to add a calcium channel blocker (e.g.,
amlodipine) or a thiazide diuretic. Since lisinopril 20 mg is a moderate dose and not at
its maximum (40 mg), one could increase it; however, the most appropriate next step per
ADA guidelines, especially when already on an ACE inhibitor, is to add a second agent
rather than increase the ACE inhibitor to its maximum, as combination therapy is often
more effective. Amlodipine is the preferred add-on agent.
Question 2: A 45-year-old female presents with complaints of fatigue, weight
gain, cold intolerance, and constipation over the past 6 months. Her vital signs
are stable. Physical examination reveals a dry, pale complexion and
bradycardia at 52 bpm. Laboratory results show TSH > 20 mIU/L (ref 0.5-5.0)
and free T4 < 0.5 ng/dL (ref 0.8-1.8). The patient is started on levothyroxine
50 mcg daily. What is the most important patient education point regarding
this medication?
,A. Take the medication with food to reduce gastric upset.
B. The medication can be taken at any time of day, as long as it is consistent.
C. Take the medication on an empty stomach, 30-60 minutes before breakfast, and avoid
calcium or iron supplements within 4 hours.
D. If a dose is missed, double the dose the next day.
CORRECT ANSWER: C. Take the medication on an empty stomach, 30-60
minutes before breakfast, and avoid calcium or iron supplements within 4
hours.
Rationale: Levothyroxine absorption is significantly affected by food, as well as by
calcium, iron, and certain other medications. To ensure maximal and consistent
absorption, it must be taken on an empty stomach, 30-60 minutes before the first meal
of the day. Patients should avoid co-administration with calcium or iron supplements
within 4 hours of taking levothyroxine. Taking it with food (Option A) decreases
absorption. It should be taken at the same time each day, but that time must be in the
morning on an empty stomach, not just any consistent time (Option B). Doubling a
missed dose (Option D) is unsafe and can cause hyperthyroid symptoms.
Question 3: A 72-year-old male with a history of coronary artery disease and
heart failure with reduced ejection fraction (HFrEF) presents to the clinic with
worsening dyspnea on exertion and lower extremity edema. His current
medications include carvedilol 25 mg twice daily, lisinopril 20 mg daily, and
furosemide 40 mg daily. His ejection fraction is 30%. What is the most
appropriate addition to his regimen to improve mortality and reduce
hospitalizations?
A. Digoxin 0.125 mg daily.
B. Spironolactone 25 mg daily.
C. Hydralazine and isosorbide dinitrate combination.
D. Diltiazem extended-release 120 mg daily.
CORRECT ANSWER: B. Spironolactone 25 mg daily.
Rationale: The patient has HFrEF and is already on guideline-directed medical therapy
(GDMT) with a beta-blocker (carvedilol) and an ACE inhibitor (lisinopril). The next step
in GDMT for a patient with persistent NYHA class II-IV symptoms and an ejection
fraction ≤35% is to add a mineralocorticoid receptor antagonist (MRA), such as
spironolactone or eplerenone. This has been shown to reduce mortality and
hospitalizations. Digoxin (Option A) can be used for symptom control or rate control in
atrial fibrillation but does not have a mortality benefit. Hydralazine and isosorbide
dinitrate (Option C) are indicated in African American patients or those who cannot
tolerate ACE inhibitors/ARBs. Diltiazem (Option D) is a calcium channel blocker and is
contraindicated in HFrEF due to its negative inotropic effects.
,Question 4: A 38-year-old female presents with a chief complaint of headaches
that have been occurring for the past two weeks. She describes them as severe,
throbbing, and unilateral, often accompanied by nausea and photophobia. She
had a similar episode three months ago. She is otherwise healthy and takes no
regular medications. Her neurological exam is normal. What is the most
appropriate initial treatment for an acute episode of this type of headache?
A. Ibuprofen 400 mg orally.
B. Sumatriptan 50 mg orally.
C. Propranolol 40 mg twice daily.
D. Acetaminophen 650 mg orally.
CORRECT ANSWER: B. Sumatriptan 50 mg orally.
Rationale: The patient's symptoms are classic for a migraine headache (unilateral,
throbbing, with nausea and photophobia). For an acute migraine attack in a patient
without contraindications, a triptan (e.g., sumatriptan) is a first-line specific therapy,
especially if the headache is moderate to severe. Ibuprofen and acetaminophen (Options
A and D) are first-line for mild headaches or as adjuncts, but sumatriptan is more
specific and effective for moderate-to-severe migraines. Propranolol (Option C) is a
prophylactic treatment used to reduce the frequency of migraines, not for acute
treatment of an episode.
Question 5: A 60-year-old male with a 40-pack-year smoking history presents
with a chronic cough, hemoptysis, and weight loss. A chest X-ray shows a right
hilar mass. A CT-guided biopsy confirms non-small cell lung cancer. Which of
the following is the most important prognostic factor that will guide initial
treatment decisions?
A. The patient's age.
B. The patient's performance status.
C. The specific histological subtype (e.g., adenocarcinoma vs. squamous).
D. The TNM stage of the cancer.
CORRECT ANSWER: D. The TNM stage of the cancer.
Rationale: The TNM (Tumor, Node, Metastasis) staging system is the most critical
prognostic factor and the primary determinant of treatment options for non-small cell
lung cancer. Stage I or II disease is often treated with surgery, while stage III may
involve a combination of chemotherapy, radiation, and/or surgery, and stage IV is
typically managed with systemic therapy (chemotherapy, targeted therapy, or
immunotherapy). While age, performance status, and histological subtype are all
important considerations in treatment planning, the stage of the cancer is the
overarching factor that dictates the initial treatment approach and provides the most
significant prognostic information.
, Question 6: A 55-year-old female with a history of osteoarthritis presents with
a chief complaint of acute-onset, severe pain, swelling, and redness in her
right great toe. She denies any trauma. She has no significant past medical
history. On examination, the joint is warm, erythematous, and exquisitely
tender. Which of the following is the most appropriate initial pharmacologic
treatment for this acute condition?
A. Allopurinol 300 mg daily.
B. Colchicine 0.6 mg followed by 0.6 mg one hour later, then daily.
C. Prednisone 20 mg daily.
D. Febuxostat 40 mg daily.
CORRECT ANSWER: B. Colchicine 0.6 mg followed by 0.6 mg one hour later,
then daily.
Rationale: The patient's presentation is classic for an acute gout flare. The first-line
treatments for an acute flare include NSAIDs, colchicine, or corticosteroids. Colchicine
is a highly effective option when started within 24-36 hours of symptom onset. The
recommended dosing is a loading dose of 1.2 mg (two 0.6 mg tablets) followed by 0.6
mg one hour later (Option B's dosing is the standard for acute flare). Allopurinol and
febuxostat (Options A and D) are urate-lowering therapies used for chronic management
of hyperuricemia to prevent future flares, not for the acute flare itself. Prednisone
(Option C) is an option but is often used if colchicine or NSAIDs are contraindicated or
ineffective.
Question 7: A 70-year-old male with a history of hypertension and benign
prostatic hyperplasia presents with a new onset of confusion and lethargy over
the past two days. His family reports he has had a poor appetite and has been
drinking less fluid. His current medications include lisinopril 40 mg daily and
tamsulosin 0.4 mg daily. His laboratory results show sodium 128 mEq/L,
potassium 5.5 mEq/L, BUN 36 mg/dL, and creatinine 1.6 mg/dL. Which of the
following is the most likely cause of his hyponatremia?
A. Medication-induced (ACE inhibitor).
B. Syndrome of Inappropriate Antidiuretic Hormone (SIADH).
C. Hypovolemic hyponatremia.
D. Hypervolemic hyponatremia from heart failure.
CORRECT ANSWER: C. Hypovolemic hyponatremia.
Rationale: The patient's presentation includes hypovolemic symptoms (poor appetite,
decreased fluid intake) and laboratory findings of elevated BUN and creatinine,
indicating prerenal azotemia. His potassium is also elevated, which is more consistent
with hypovolemia (leading to decreased renal perfusion and decreased aldosterone
effect) rather than SIADH (which typically presents with low or normal potassium). ACE
inhibitors (lisinopril) can cause hyperkalemia but are less likely to be the primary cause
