NU 578 Unit 4 Study Guide: Advanced
Pharmacotherapeutics Exam 2026/2027 USA
175 Questions with Correct Answers and
Rationales
1. Which of the following is the primary mechanism of action for Metformin in the
treatment of Type 2 Diabetes?
A. Decreases hepatic glucose production and improves insulin sensitivity
B. Stimulates insulin secretion from pancreatic beta cells
C. Increases glucose excretion through the kidneys
D. Slows the absorption of carbohydrates in the small intestine
Answer: A
Rationale: Metformin primarily works by inhibiting hepatic gluconeogenesis and
increasing peripheral glucose uptake, unlike sulfonylureas which stimulate insulin
release.
2. When prescribing Levothyroxine for a patient with newly diagnosed
hypothyroidism, which instruction is most important?
A. Take the medication with a full meal to avoid GI upset
B. Take the medication at bedtime with a glass of milk
C. Take the medication on an empty stomach, 30-60 minutes before breakfast
D. Take the medication only when symptoms like fatigue occur
Answer: C
Rationale: Levothyroxine absorption is significantly affected by food and other
medications; it must be taken on an empty stomach for consistent bioavailability.
3. A patient on Warfarin therapy has an INR of 7.0 but no active bleeding. What is
the recommended immediate action per evidence-based guidelines?
A. Administer Vitamin K 10mg IV immediately
B. Administer Fresh Frozen Plasma (FFP)
C. Hold Warfarin and consider oral Vitamin K
D. Double the next dose of Warfarin to stabilize the blood
Answer: C
*Rationale: For an INR between 4.5 and 10 without bleeding, guidelines suggest
,holding the dose and potentially using low-dose oral Vitamin K; IV is reserved for
major bleeding.*
4. Which class of diabetes medications is contraindicated in patients with a history
of New York Heart Association (NYHA) Class III or IV heart failure?
A. SGLT2 inhibitors
B. DPP-4 inhibitors
C. Thiazolidinediones (TZDs)
D. GLP-1 receptor agonists
Answer: C
Rationale: TZDs like Pioglitazone cause fluid retention, which can exacerbate
underlying heart failure.
5. What is the black box warning associated with all Estrogen-only hormone
replacement therapies in women with an intact uterus?
A. Increased risk of hypothyroidism
B. Increased risk of osteoporosis
C. Increased risk of colon cancer
D. Increased risk of endometrial cancer
Answer: D
Rationale: Unopposed estrogen stimulates endometrial growth, significantly
increasing the risk of endometrial hyperplasia and cancer; progestogen must be
added.
6. Which anticoagulant is preferred for a pregnant patient requiring treatment for
Venous Thromboembolism (VTE)?
A. Warfarin
B. Low Molecular Weight Heparin (LMWH)
C. Rivaroxaban
D. Dabigatran
Answer: B
Rationale: LMWH does not cross the placenta and is not teratogenic, unlike
Warfarin which is contraindicated in pregnancy.
7. What is the mechanism of action of SGLT2 inhibitors like Empagliflozin?
A. Enhance insulin sensitivity in skeletal muscle
B. Block the breakdown of GLP-1
C. Inhibit glucose reabsorption in the proximal renal tubule
D. Decrease glucagon secretion from the alpha cells
,Answer: C
*Rationale: Sodium-glucose cotransporter 2 (SGLT2) inhibitors promote the
excretion of glucose in the urine by blocking its reabsorption in the kidneys.*
8. Which medication is the first-line treatment for a patient with symptomatic
hyperthyroidism (Graves' Disease) who is in her first trimester of pregnancy?
A. Methimazole
B. Propylthiouracil (PTU)
C. Radioactive Iodine
D. High-dose Aspirin
Answer: B
Rationale: PTU is preferred in the first trimester because Methimazole is
associated with rare embryopathy (aplasia cutis). Methimazole is usually used in
the 2nd and 3rd trimesters.
9. A patient with Type 2 diabetes has an eGFR of 35 mL/min. Which medication
requires dose adjustment?
A. Pioglitazone
B. Glipizide
C. Liraglutide
D. Metformin
Answer: D
Rationale: Metformin is contraindicated or requires dose reduction when eGFR
<45 due to risk of lactic acidosis.
10. Which of the following is an adverse effect of loop diuretics (e.g., Furosemide)
that requires monitoring?
A. Hyperkalemia
B. Hypokalemia
C. Hypernatremia
D. Hypermagnesemia
Answer: B
Rationale: Loop diuretics cause loss of potassium, magnesium, and calcium;
hypokalemia can lead to arrhythmias.
11. A patient on Amiodarone develops a new onset of cough, dyspnea, and
pulmonary infiltrates. What is the most likely diagnosis?
A. Amiodarone-induced pulmonary toxicity
B. Heart failure exacerbation
, C. Bacterial pneumonia
D. Pulmonary embolism
Answer: A
Rationale: Amiodarone can cause pulmonary fibrosis or hypersensitivity
pneumonitis; requires discontinuation and possibly corticosteroids.
12. Which antibiotic is associated with a disulfiram-like reaction when combined
with alcohol?
A. Amoxicillin
B. Azithromycin
C. Metronidazole
D. Doxycycline
Answer: C
Rationale: Metronidazole inhibits aldehyde dehydrogenase, causing nausea,
vomiting, flushing, and headache with alcohol.
13. What is the first-line treatment for a patient with acute uncomplicated cystitis?
A. Ciprofloxacin 500 mg BID for 3 days
B. Nitrofurantoin monohydrate 100 mg BID for 5 days
C. Doxycycline 100 mg BID for 7 days
D. Clindamycin 300 mg TID for 7 days
Answer: B
Rationale: Nitrofurantoin is first-line for uncomplicated cystitis; fluoroquinolones
are reserved for complicated cases or when other agents cannot be used.
14. A patient with hypertension is prescribed Lisinopril. Which lab value must be
monitored before and after initiation?
A. Hemoglobin A1c
B. Serum creatinine and potassium
C. Liver function tests
D. Thyroid stimulating hormone
Answer: B
Rationale: ACE inhibitors can cause acute kidney injury and hyperkalemia;
baseline and follow-up renal function and potassium are essential.
15. Which medication is most likely to cause a persistent, dry cough as a side
effect?
A. Losartan
B. Lisinopril
Pharmacotherapeutics Exam 2026/2027 USA
175 Questions with Correct Answers and
Rationales
1. Which of the following is the primary mechanism of action for Metformin in the
treatment of Type 2 Diabetes?
A. Decreases hepatic glucose production and improves insulin sensitivity
B. Stimulates insulin secretion from pancreatic beta cells
C. Increases glucose excretion through the kidneys
D. Slows the absorption of carbohydrates in the small intestine
Answer: A
Rationale: Metformin primarily works by inhibiting hepatic gluconeogenesis and
increasing peripheral glucose uptake, unlike sulfonylureas which stimulate insulin
release.
2. When prescribing Levothyroxine for a patient with newly diagnosed
hypothyroidism, which instruction is most important?
A. Take the medication with a full meal to avoid GI upset
B. Take the medication at bedtime with a glass of milk
C. Take the medication on an empty stomach, 30-60 minutes before breakfast
D. Take the medication only when symptoms like fatigue occur
Answer: C
Rationale: Levothyroxine absorption is significantly affected by food and other
medications; it must be taken on an empty stomach for consistent bioavailability.
3. A patient on Warfarin therapy has an INR of 7.0 but no active bleeding. What is
the recommended immediate action per evidence-based guidelines?
A. Administer Vitamin K 10mg IV immediately
B. Administer Fresh Frozen Plasma (FFP)
C. Hold Warfarin and consider oral Vitamin K
D. Double the next dose of Warfarin to stabilize the blood
Answer: C
*Rationale: For an INR between 4.5 and 10 without bleeding, guidelines suggest
,holding the dose and potentially using low-dose oral Vitamin K; IV is reserved for
major bleeding.*
4. Which class of diabetes medications is contraindicated in patients with a history
of New York Heart Association (NYHA) Class III or IV heart failure?
A. SGLT2 inhibitors
B. DPP-4 inhibitors
C. Thiazolidinediones (TZDs)
D. GLP-1 receptor agonists
Answer: C
Rationale: TZDs like Pioglitazone cause fluid retention, which can exacerbate
underlying heart failure.
5. What is the black box warning associated with all Estrogen-only hormone
replacement therapies in women with an intact uterus?
A. Increased risk of hypothyroidism
B. Increased risk of osteoporosis
C. Increased risk of colon cancer
D. Increased risk of endometrial cancer
Answer: D
Rationale: Unopposed estrogen stimulates endometrial growth, significantly
increasing the risk of endometrial hyperplasia and cancer; progestogen must be
added.
6. Which anticoagulant is preferred for a pregnant patient requiring treatment for
Venous Thromboembolism (VTE)?
A. Warfarin
B. Low Molecular Weight Heparin (LMWH)
C. Rivaroxaban
D. Dabigatran
Answer: B
Rationale: LMWH does not cross the placenta and is not teratogenic, unlike
Warfarin which is contraindicated in pregnancy.
7. What is the mechanism of action of SGLT2 inhibitors like Empagliflozin?
A. Enhance insulin sensitivity in skeletal muscle
B. Block the breakdown of GLP-1
C. Inhibit glucose reabsorption in the proximal renal tubule
D. Decrease glucagon secretion from the alpha cells
,Answer: C
*Rationale: Sodium-glucose cotransporter 2 (SGLT2) inhibitors promote the
excretion of glucose in the urine by blocking its reabsorption in the kidneys.*
8. Which medication is the first-line treatment for a patient with symptomatic
hyperthyroidism (Graves' Disease) who is in her first trimester of pregnancy?
A. Methimazole
B. Propylthiouracil (PTU)
C. Radioactive Iodine
D. High-dose Aspirin
Answer: B
Rationale: PTU is preferred in the first trimester because Methimazole is
associated with rare embryopathy (aplasia cutis). Methimazole is usually used in
the 2nd and 3rd trimesters.
9. A patient with Type 2 diabetes has an eGFR of 35 mL/min. Which medication
requires dose adjustment?
A. Pioglitazone
B. Glipizide
C. Liraglutide
D. Metformin
Answer: D
Rationale: Metformin is contraindicated or requires dose reduction when eGFR
<45 due to risk of lactic acidosis.
10. Which of the following is an adverse effect of loop diuretics (e.g., Furosemide)
that requires monitoring?
A. Hyperkalemia
B. Hypokalemia
C. Hypernatremia
D. Hypermagnesemia
Answer: B
Rationale: Loop diuretics cause loss of potassium, magnesium, and calcium;
hypokalemia can lead to arrhythmias.
11. A patient on Amiodarone develops a new onset of cough, dyspnea, and
pulmonary infiltrates. What is the most likely diagnosis?
A. Amiodarone-induced pulmonary toxicity
B. Heart failure exacerbation
, C. Bacterial pneumonia
D. Pulmonary embolism
Answer: A
Rationale: Amiodarone can cause pulmonary fibrosis or hypersensitivity
pneumonitis; requires discontinuation and possibly corticosteroids.
12. Which antibiotic is associated with a disulfiram-like reaction when combined
with alcohol?
A. Amoxicillin
B. Azithromycin
C. Metronidazole
D. Doxycycline
Answer: C
Rationale: Metronidazole inhibits aldehyde dehydrogenase, causing nausea,
vomiting, flushing, and headache with alcohol.
13. What is the first-line treatment for a patient with acute uncomplicated cystitis?
A. Ciprofloxacin 500 mg BID for 3 days
B. Nitrofurantoin monohydrate 100 mg BID for 5 days
C. Doxycycline 100 mg BID for 7 days
D. Clindamycin 300 mg TID for 7 days
Answer: B
Rationale: Nitrofurantoin is first-line for uncomplicated cystitis; fluoroquinolones
are reserved for complicated cases or when other agents cannot be used.
14. A patient with hypertension is prescribed Lisinopril. Which lab value must be
monitored before and after initiation?
A. Hemoglobin A1c
B. Serum creatinine and potassium
C. Liver function tests
D. Thyroid stimulating hormone
Answer: B
Rationale: ACE inhibitors can cause acute kidney injury and hyperkalemia;
baseline and follow-up renal function and potassium are essential.
15. Which medication is most likely to cause a persistent, dry cough as a side
effect?
A. Losartan
B. Lisinopril
