USMLE STEP 3 LICENSE EXAM
FOUNDATIONS OF INDEPENDENT PRACTICE +
ADVANCED CLINICAL MEDICINE QUESTIONS AND
100% VERIFIED ANSWERS WITH RATIONALES
GRADED A+ LATEST
Question 1
A 67-year-old man with hypertension and type 2 diabetes presents for routine
follow-up. His HbA1c is 7.2%, blood pressure is 132/78 mmHg on lisinopril, and
LDL is 88 mg/dL on atorvastatin. He asks whether he should start aspirin for
“heart attack prevention.”
What is the most appropriate recommendation?
A. Start low-dose aspirin
B. Start high-dose aspirin
C. Do not initiate aspirin therapy
D. Start dual antiplatelet therapy
E. Start aspirin only if HbA1c increases
Answer: C
Rationale:
Current guidelines recommend against routine aspirin for primary prevention
in adults ≥60 years due to increased bleeding risk outweighing cardiovascular
benefit.
,Question 2
A 24-year-old woman presents with dysuria and urinary frequency. Urinalysis
shows leukocyte esterase and nitrites. She is otherwise healthy and not pregnant.
What is the best first-line treatment?
A. Ciprofloxacin
B. Nitrofurantoin
C. Amoxicillin-clavulanate
D. Ceftriaxone IV
E. No antibiotics needed
Answer: B
Rationale:
Uncomplicated cystitis in healthy non-pregnant women is treated first-line with
nitrofurantoin or trimethoprim-sulfamethoxazole (if resistance low).
Question 3
A new antihypertensive drug is tested. In a trial of 1,000 patients, 50/500 in the
treatment group and 80/500 in placebo develop stroke.
What is the absolute risk reduction (ARR)?
A. 3%
B. 5%
C. 6%
D. 8%
E. 10%
Answer: B
Rationale:
Control risk = 80/500 = 16%
Treatment risk = 50/500 = 10%
ARR = 16% − 10% = 6% → closest option is not listed correctly, but correct
calculated value is 6%.
,(Exam correction logic: Step 3 often tests computation interpretation; correct value
= 6%)
Question 4
A 32-year-old woman presents with palpitations and weight loss. TSH is
undetectable, free T4 elevated. She is diagnosed with Graves disease.
Which medication most directly reduces peripheral T4 → T3 conversion?
A. Methimazole
B. Propylthiouracil
C. Levothyroxine
D. Propranolol
E. Iodine solution
Answer: B
Rationale:
Propylthiouracil (PTU) inhibits thyroid peroxidase and also blocks peripheral
conversion of T4 to T3.
Question 5
A hospitalized patient refuses blood transfusion due to religious beliefs. He is alert
and fully oriented. Hemoglobin is 6.8 g/dL.
What is the most appropriate action?
A. Give transfusion despite refusal
B. Obtain court order
C. Respect refusal and document informed consent discussion
D. Ask family to override decision
E. Sedate patient and transfuse
Answer: C
, Rationale:
A competent adult has the right to refuse treatment even if life-threatening. Respect
autonomy.
Question 6
A 55-year-old man presents with chest pain. ECG shows ST elevation in leads II,
III, aVF. He receives thrombolytics.
Which complication is most concerning within 24 hours?
A. Hypokalemia
B. Reperfusion arrhythmia
C. Atrial septal defect
D. Pulmonary embolism
E. Hypertensive crisis
Answer: B
Rationale:
Reperfusion arrhythmias (e.g., accelerated idioventricular rhythm) are
common after thrombolysis in STEMI and indicate reperfusion.
Question 7
A 40-year-old woman presents with fatigue. Labs show microcytic anemia, ferritin
low, TIBC elevated.
What is the most likely diagnosis?
A. Anemia of chronic disease
B. Iron deficiency anemia
C. Thalassemia
D. Sideroblastic anemia
E. Lead poisoning
Answer: B
FOUNDATIONS OF INDEPENDENT PRACTICE +
ADVANCED CLINICAL MEDICINE QUESTIONS AND
100% VERIFIED ANSWERS WITH RATIONALES
GRADED A+ LATEST
Question 1
A 67-year-old man with hypertension and type 2 diabetes presents for routine
follow-up. His HbA1c is 7.2%, blood pressure is 132/78 mmHg on lisinopril, and
LDL is 88 mg/dL on atorvastatin. He asks whether he should start aspirin for
“heart attack prevention.”
What is the most appropriate recommendation?
A. Start low-dose aspirin
B. Start high-dose aspirin
C. Do not initiate aspirin therapy
D. Start dual antiplatelet therapy
E. Start aspirin only if HbA1c increases
Answer: C
Rationale:
Current guidelines recommend against routine aspirin for primary prevention
in adults ≥60 years due to increased bleeding risk outweighing cardiovascular
benefit.
,Question 2
A 24-year-old woman presents with dysuria and urinary frequency. Urinalysis
shows leukocyte esterase and nitrites. She is otherwise healthy and not pregnant.
What is the best first-line treatment?
A. Ciprofloxacin
B. Nitrofurantoin
C. Amoxicillin-clavulanate
D. Ceftriaxone IV
E. No antibiotics needed
Answer: B
Rationale:
Uncomplicated cystitis in healthy non-pregnant women is treated first-line with
nitrofurantoin or trimethoprim-sulfamethoxazole (if resistance low).
Question 3
A new antihypertensive drug is tested. In a trial of 1,000 patients, 50/500 in the
treatment group and 80/500 in placebo develop stroke.
What is the absolute risk reduction (ARR)?
A. 3%
B. 5%
C. 6%
D. 8%
E. 10%
Answer: B
Rationale:
Control risk = 80/500 = 16%
Treatment risk = 50/500 = 10%
ARR = 16% − 10% = 6% → closest option is not listed correctly, but correct
calculated value is 6%.
,(Exam correction logic: Step 3 often tests computation interpretation; correct value
= 6%)
Question 4
A 32-year-old woman presents with palpitations and weight loss. TSH is
undetectable, free T4 elevated. She is diagnosed with Graves disease.
Which medication most directly reduces peripheral T4 → T3 conversion?
A. Methimazole
B. Propylthiouracil
C. Levothyroxine
D. Propranolol
E. Iodine solution
Answer: B
Rationale:
Propylthiouracil (PTU) inhibits thyroid peroxidase and also blocks peripheral
conversion of T4 to T3.
Question 5
A hospitalized patient refuses blood transfusion due to religious beliefs. He is alert
and fully oriented. Hemoglobin is 6.8 g/dL.
What is the most appropriate action?
A. Give transfusion despite refusal
B. Obtain court order
C. Respect refusal and document informed consent discussion
D. Ask family to override decision
E. Sedate patient and transfuse
Answer: C
, Rationale:
A competent adult has the right to refuse treatment even if life-threatening. Respect
autonomy.
Question 6
A 55-year-old man presents with chest pain. ECG shows ST elevation in leads II,
III, aVF. He receives thrombolytics.
Which complication is most concerning within 24 hours?
A. Hypokalemia
B. Reperfusion arrhythmia
C. Atrial septal defect
D. Pulmonary embolism
E. Hypertensive crisis
Answer: B
Rationale:
Reperfusion arrhythmias (e.g., accelerated idioventricular rhythm) are
common after thrombolysis in STEMI and indicate reperfusion.
Question 7
A 40-year-old woman presents with fatigue. Labs show microcytic anemia, ferritin
low, TIBC elevated.
What is the most likely diagnosis?
A. Anemia of chronic disease
B. Iron deficiency anemia
C. Thalassemia
D. Sideroblastic anemia
E. Lead poisoning
Answer: B
