CPJE CLINICAL EXAM FREQUENTLY TESTED QUESTIONS WITH CORRECT
ANSWERS — BRAND NEW! CALIFORNIA PRACTICE STANDARDS AND
JURISPRUDENCE EXAM |COMPREHENSIVE CLINICAL EXAM PREP |
DETAILED QUESTIONS WITH RATIONALES
UNIT 1: CARDIOVASCULAR AND ANTICOAGULATION (1–20)
1. A 72-year-old male with atrial fibrillation has been stable on warfarin for
two years. His INR today is 3.8, and he is completely asymptomatic. What is
the most appropriate action?
a) Continue current warfarin dose
b) Hold warfarin and administer vitamin K 10 mg PO
c) Hold warfarin for 1–2 days, then resume at a lower dose
d) Increase warfarin dose to achieve INR 4.0
Answer: c
Rationale: An INR of 3.8 without bleeding is above the therapeutic range
(typically 2–3 for atrial fibrillation). The appropriate action is to hold
warfarin for 1–2 days and resume at a lower dose, with close INR monitoring.
Vitamin K is reserved for serious bleeding or very high INR (typically >10 or
with bleeding). Continuing or increasing the dose would elevate bleeding risk.
Option (b) is too aggressive for an asymptomatic patient.
2. A patient taking warfarin is prescribed trimethoprim-sulfamethoxazole
(TMP-SMX) for a urinary tract infection. What should the pharmacist do?
a) Dispense normally and counsel on bleeding signs
b) Alert the prescriber due to a significant drug interaction
c) Increase the warfarin dose empirically
d) Stop the antibiotic immediately
Answer: b
Rationale: TMP-SMX inhibits CYP2C9, which metabolizes warfarin, leading to
increased INR and bleeding risk. The pharmacist should alert the prescriber
and recommend either an alternative antibiotic or close INR monitoring with
possible warfarin dose reduction. Simply dispensing with counseling is
insufficient. Increasing the warfarin dose would worsen the interaction, and
the pharmacist cannot unilaterally stop the antibiotic.
1
,3. Which medication is contraindicated in pregnancy due to teratogenicity?
a) Amoxicillin
b) Acetaminophen
c) Isotretinoin
d) Metformin
Answer: c
Rationale: Isotretinoin is a Category X teratogen and is absolutely
contraindicated in pregnancy. It causes severe craniofacial, cardiac, and CNS
defects. The iPLEDGE program is required to prevent fetal exposure.
Amoxicillin, acetaminophen, and metformin are generally considered safe in
pregnancy.
4. A patient on an ACE inhibitor develops a persistent dry cough. What is the
most appropriate alternative?
a) Beta-blocker
b) ARB such as losartan
c) Diuretic
d) Calcium channel blocker
Answer: b
Rationale: ACE inhibitors cause cough in 5–20% of patients due to bradykinin
accumulation. ARBs (e.g., losartan) do not affect bradykinin metabolism and are
the preferred alternative. Beta-blockers, diuretics, and calcium channel
blockers are not direct substitutes for ACE inhibitors in this context.
5. Which statin has the highest potency for LDL reduction?
a) Simvastatin
b) Pravastatin
c) Atorvastatin
d) Lovastatin
Answer: c
Rationale: Atorvastatin (and rosuvastatin) provides the highest potency among
statins, with LDL reduction of 50–60% at high doses. Simvastatin, pravastatin,
and lovastatin are less potent. This is frequently tested in CPJE questions
about high-intensity statin therapy.
2
,6. A patient with atrial fibrillation needs stroke prevention. Which is most
appropriate?
a) Aspirin only
b) Anticoagulant such as apixaban
c) Beta-blocker
d) Calcium channel blocker
Answer: b
Rationale: Atrial fibrillation significantly increases stroke risk. Anticoagulation
with a DOAC (e.g., apixaban) or warfarin is indicated based on CHA₂DS₂-VASc
score. Aspirin alone is insufficient. Beta-blockers and calcium channel blockers
control rate but do not prevent stroke.
7. What lab value must be monitored with warfarin therapy?
a) CBC
b) Platelets
c) INR
d) Serum sodium
Answer: c
Rationale: INR measures clotting time and ensures warfarin is within
therapeutic range. Regular monitoring prevents bleeding or thrombotic
complications. CBC and platelets are important but not the primary monitoring
parameter for warfarin efficacy.
8. A patient taking warfarin is started on amiodarone. What adjustment is most
appropriate?
a) Increase warfarin dose by 25%
b) Decrease warfarin dose by 30–50%
c) No change needed
d) Discontinue warfarin
Answer: b
Rationale: Amiodarone inhibits CYP2C9 and CYP3A4, significantly increasing
warfarin levels and INR. The warfarin dose should be empirically reduced by
30–50% with close INR monitoring. Increasing or not changing the dose risks
bleeding.
3
, 9. Which herb or dietary supplement is most likely to potentiate warfarin?
a) Ginkgo
b) St. John's wort
c) Vitamin K
d) Fish oil
Answer: a
Rationale: Ginkgo inhibits platelet aggregation and can potentiate warfarin's
anticoagulant effect, increasing bleeding risk. St. John's wort induces CYP
enzymes and decreases warfarin. Vitamin K antagonizes warfarin. Fish oil may
have mild antiplatelet effects but is less significant than ginkgo.
10. A patient on warfarin has an INR of 4.5 without bleeding. What is the most
appropriate management?
a) Hold warfarin for 1–2 days, no vitamin K
b) Hold warfarin and give vitamin K 10 mg PO
c) Continue current dose
d) Increase warfarin dose
Answer: a
Rationale: For INR 4.5–10 without bleeding, guidelines recommend holding
warfarin for 1–2 days without vitamin K, then resuming at a lower dose.
Vitamin K is reserved for serious bleeding or very high INR. Continuing or
increasing the dose risks bleeding.
11. Which DOAC is contraindicated in patients with mechanical heart valves?
a) Apixaban
b) Rivaroxaban
c) Dabigatran
d) All DOACs
Answer: d
Rationale: All DOACs (apixaban, rivaroxaban, dabigatran, edoxaban) are
contraindicated in patients with mechanical heart valves. Warfarin remains the
standard of care for these patients. This is a critical safety point.
12. A patient with heart failure should be started on which beta-blocker?
a) Atenolol
4
ANSWERS — BRAND NEW! CALIFORNIA PRACTICE STANDARDS AND
JURISPRUDENCE EXAM |COMPREHENSIVE CLINICAL EXAM PREP |
DETAILED QUESTIONS WITH RATIONALES
UNIT 1: CARDIOVASCULAR AND ANTICOAGULATION (1–20)
1. A 72-year-old male with atrial fibrillation has been stable on warfarin for
two years. His INR today is 3.8, and he is completely asymptomatic. What is
the most appropriate action?
a) Continue current warfarin dose
b) Hold warfarin and administer vitamin K 10 mg PO
c) Hold warfarin for 1–2 days, then resume at a lower dose
d) Increase warfarin dose to achieve INR 4.0
Answer: c
Rationale: An INR of 3.8 without bleeding is above the therapeutic range
(typically 2–3 for atrial fibrillation). The appropriate action is to hold
warfarin for 1–2 days and resume at a lower dose, with close INR monitoring.
Vitamin K is reserved for serious bleeding or very high INR (typically >10 or
with bleeding). Continuing or increasing the dose would elevate bleeding risk.
Option (b) is too aggressive for an asymptomatic patient.
2. A patient taking warfarin is prescribed trimethoprim-sulfamethoxazole
(TMP-SMX) for a urinary tract infection. What should the pharmacist do?
a) Dispense normally and counsel on bleeding signs
b) Alert the prescriber due to a significant drug interaction
c) Increase the warfarin dose empirically
d) Stop the antibiotic immediately
Answer: b
Rationale: TMP-SMX inhibits CYP2C9, which metabolizes warfarin, leading to
increased INR and bleeding risk. The pharmacist should alert the prescriber
and recommend either an alternative antibiotic or close INR monitoring with
possible warfarin dose reduction. Simply dispensing with counseling is
insufficient. Increasing the warfarin dose would worsen the interaction, and
the pharmacist cannot unilaterally stop the antibiotic.
1
,3. Which medication is contraindicated in pregnancy due to teratogenicity?
a) Amoxicillin
b) Acetaminophen
c) Isotretinoin
d) Metformin
Answer: c
Rationale: Isotretinoin is a Category X teratogen and is absolutely
contraindicated in pregnancy. It causes severe craniofacial, cardiac, and CNS
defects. The iPLEDGE program is required to prevent fetal exposure.
Amoxicillin, acetaminophen, and metformin are generally considered safe in
pregnancy.
4. A patient on an ACE inhibitor develops a persistent dry cough. What is the
most appropriate alternative?
a) Beta-blocker
b) ARB such as losartan
c) Diuretic
d) Calcium channel blocker
Answer: b
Rationale: ACE inhibitors cause cough in 5–20% of patients due to bradykinin
accumulation. ARBs (e.g., losartan) do not affect bradykinin metabolism and are
the preferred alternative. Beta-blockers, diuretics, and calcium channel
blockers are not direct substitutes for ACE inhibitors in this context.
5. Which statin has the highest potency for LDL reduction?
a) Simvastatin
b) Pravastatin
c) Atorvastatin
d) Lovastatin
Answer: c
Rationale: Atorvastatin (and rosuvastatin) provides the highest potency among
statins, with LDL reduction of 50–60% at high doses. Simvastatin, pravastatin,
and lovastatin are less potent. This is frequently tested in CPJE questions
about high-intensity statin therapy.
2
,6. A patient with atrial fibrillation needs stroke prevention. Which is most
appropriate?
a) Aspirin only
b) Anticoagulant such as apixaban
c) Beta-blocker
d) Calcium channel blocker
Answer: b
Rationale: Atrial fibrillation significantly increases stroke risk. Anticoagulation
with a DOAC (e.g., apixaban) or warfarin is indicated based on CHA₂DS₂-VASc
score. Aspirin alone is insufficient. Beta-blockers and calcium channel blockers
control rate but do not prevent stroke.
7. What lab value must be monitored with warfarin therapy?
a) CBC
b) Platelets
c) INR
d) Serum sodium
Answer: c
Rationale: INR measures clotting time and ensures warfarin is within
therapeutic range. Regular monitoring prevents bleeding or thrombotic
complications. CBC and platelets are important but not the primary monitoring
parameter for warfarin efficacy.
8. A patient taking warfarin is started on amiodarone. What adjustment is most
appropriate?
a) Increase warfarin dose by 25%
b) Decrease warfarin dose by 30–50%
c) No change needed
d) Discontinue warfarin
Answer: b
Rationale: Amiodarone inhibits CYP2C9 and CYP3A4, significantly increasing
warfarin levels and INR. The warfarin dose should be empirically reduced by
30–50% with close INR monitoring. Increasing or not changing the dose risks
bleeding.
3
, 9. Which herb or dietary supplement is most likely to potentiate warfarin?
a) Ginkgo
b) St. John's wort
c) Vitamin K
d) Fish oil
Answer: a
Rationale: Ginkgo inhibits platelet aggregation and can potentiate warfarin's
anticoagulant effect, increasing bleeding risk. St. John's wort induces CYP
enzymes and decreases warfarin. Vitamin K antagonizes warfarin. Fish oil may
have mild antiplatelet effects but is less significant than ginkgo.
10. A patient on warfarin has an INR of 4.5 without bleeding. What is the most
appropriate management?
a) Hold warfarin for 1–2 days, no vitamin K
b) Hold warfarin and give vitamin K 10 mg PO
c) Continue current dose
d) Increase warfarin dose
Answer: a
Rationale: For INR 4.5–10 without bleeding, guidelines recommend holding
warfarin for 1–2 days without vitamin K, then resuming at a lower dose.
Vitamin K is reserved for serious bleeding or very high INR. Continuing or
increasing the dose risks bleeding.
11. Which DOAC is contraindicated in patients with mechanical heart valves?
a) Apixaban
b) Rivaroxaban
c) Dabigatran
d) All DOACs
Answer: d
Rationale: All DOACs (apixaban, rivaroxaban, dabigatran, edoxaban) are
contraindicated in patients with mechanical heart valves. Warfarin remains the
standard of care for these patients. This is a critical safety point.
12. A patient with heart failure should be started on which beta-blocker?
a) Atenolol
4
