,HESI RN Pharmacology V2 Advanced Prep:
Master NGN-Style Case Scenarios &
Pharmacology Practice Questions
Subject: HESI RN Pharmacology V2 | High-Stakes Clinical Pharmacology &
Pharmacokinetics
Question 1: A client with severe rheumatoid arthritis is prescribed methotrexate. The nurse is
preparing to administer the medication and reviews the client's laboratory results: WBC
3,500/mm³, platelet count 90,000/mm³, and ALT 120 IU/L. What is the nurse's priority action?
A) Administer the dose and notify the provider of the results for follow-up.
B) Hold the dose, notify the healthcare provider, and anticipate a dose reduction or
discontinuation.
C) Administer the dose with a folic acid supplement to mitigate side effects.
D) Instruct the client to increase fluid intake and recheck labs in 24 hours.
Correct Answer: B) Hold the dose, notify the healthcare provider, and anticipate a dose
reduction or discontinuation.
Explanation: Methotrexate is a potent immunosuppressant that can cause bone marrow
suppression (leukopenia, thrombocytopenia) and hepatotoxicity. The lab values provided
indicate significant marrow suppression and elevated liver enzymes. Administering the
medication in this state could be life-threatening. Folic acid (Option C) helps prevent minor side
effects but does not address active organ toxicity or myelosuppression. Immediate intervention is
required to avoid severe complications.
Question 2: A client receiving an intravenous infusion of amiodarone for refractory ventricular
tachycardia suddenly develops symptoms of pulmonary toxicity. Which assessment finding is
most indicative of this severe adverse effect?
A) A new onset of a dry, hacking cough and exertional dyspnea.
B) Peripheral edema and weight gain of 1 kg.
C) A decrease in heart rate from 88 to 72 beats per minute.
D) Reports of metallic taste and mild photosensitivity.
Correct Answer: A) A new onset of a dry, hacking cough and exertional dyspnea.
,Explanation: Pulmonary toxicity is a rare but potentially fatal adverse effect of long-term or
high-dose amiodarone therapy. Clinical manifestations include a dry cough, dyspnea, and
pleuritic chest pain. Peripheral edema (Option B) is a sign of heart failure. A decrease in heart
rate (Option C) is an expected pharmacologic effect. Metallic taste and photosensitivity (Option
D) are common, benign side effects.
Question 3: A 65-year-old client with chronic obstructive pulmonary disease (COPD) is
prescribed theophylline. The client calls the clinic reporting nausea, vomiting, and palpitations.
What is the nurse's best response?
A) Instruct the client to take the medication with a meal to reduce GI upset.
B) Advise the client to stop the medication and come to the clinic for a serum theophylline level.
C) Suggest taking an antacid to relieve the nausea.
D) Reassure the client that these are expected initial side effects that will subside.
Correct Answer: B) Advise the client to stop the medication and come to the clinic for a
serum theophylline level.
Explanation: Theophylline has a very narrow therapeutic index. Nausea, vomiting, tachycardia,
and arrhythmias are classic signs of theophylline toxicity. Because these symptoms can rapidly
progress to seizures or life-threatening arrhythmias, the nurse must advise the client to stop the
drug and obtain a serum level to prevent toxicity.
Question 4: A client is receiving a continuous infusion of heparin for a pulmonary embolism.
The nurse notes the client has developed a new ecchymotic area on the abdomen and the aPTT is
120 seconds. What is the priority intervention?
A) Decrease the infusion rate by 2 units/kg/hr.
B) Discontinue the heparin infusion and notify the healthcare provider.
C) Administer a dose of vitamin K.
D) Obtain a baseline hemoglobin and hematocrit.
Correct Answer: B) Discontinue the heparin infusion and notify the healthcare provider.
Explanation: The normal aPTT range is typically 25-35 seconds, with a therapeutic goal of 1.5
to 2.5 times the control. An aPTT of 120 seconds is significantly elevated and indicates a high
risk for spontaneous hemorrhage. Discontinuing the infusion is the priority to allow the
anticoagulation effect to dissipate. Vitamin K (Option C) is the antidote for warfarin, not heparin
(which uses protamine sulfate). Adjusting the rate (Option A) is insufficient for this degree of
anticoagulation.
, Question 5: A client is taking lithium carbonate for bipolar disorder. The client presents with
lethargy, coarse tremors, and confusion. The nurse suspects lithium toxicity. Which concurrent
medication interaction is most likely responsible?
A) Fluoxetine.
B) Ibuprofen.
C) Levothyroxine.
D) Metoprolol.
Correct Answer: B) Ibuprofen.
Explanation: Non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen reduce renal blood
flow and can decrease lithium clearance, leading to toxic serum lithium levels. Fluoxetine,
levothyroxine, and metoprolol do not typically cause this significant pharmacokinetic
interaction. Clients on lithium should be advised to use acetaminophen instead of NSAIDs for
pain management.
Question 6: A nurse is caring for a client who is prescribed clozapine for treatment-resistant
schizophrenia. Which monitoring requirement is most critical to prevent a life-threatening
complication?
A) Monthly fasting blood glucose levels.
B) Weekly white blood cell (WBC) count and absolute neutrophil count (ANC).
C) Daily blood pressure monitoring.
D) Periodic weight and BMI calculations.
Correct Answer: B) Weekly white blood cell (WBC) count and absolute neutrophil count
(ANC).
Explanation: Clozapine carries a black box warning for agranulocytosis, a severe and
potentially fatal reduction in white blood cells. Close monitoring of the CBC with differential
(specifically the ANC) is mandatory to catch this reaction early. While hyperglycemia and
metabolic syndrome (Options A and D) are concerns, they are not the immediate, acute risks that
agranulocytosis presents.
Question 7: A client with chronic heart failure is started on spironolactone. The nurse knows to
monitor for which electrolyte imbalance?
A) Hyperkalemia.
Master NGN-Style Case Scenarios &
Pharmacology Practice Questions
Subject: HESI RN Pharmacology V2 | High-Stakes Clinical Pharmacology &
Pharmacokinetics
Question 1: A client with severe rheumatoid arthritis is prescribed methotrexate. The nurse is
preparing to administer the medication and reviews the client's laboratory results: WBC
3,500/mm³, platelet count 90,000/mm³, and ALT 120 IU/L. What is the nurse's priority action?
A) Administer the dose and notify the provider of the results for follow-up.
B) Hold the dose, notify the healthcare provider, and anticipate a dose reduction or
discontinuation.
C) Administer the dose with a folic acid supplement to mitigate side effects.
D) Instruct the client to increase fluid intake and recheck labs in 24 hours.
Correct Answer: B) Hold the dose, notify the healthcare provider, and anticipate a dose
reduction or discontinuation.
Explanation: Methotrexate is a potent immunosuppressant that can cause bone marrow
suppression (leukopenia, thrombocytopenia) and hepatotoxicity. The lab values provided
indicate significant marrow suppression and elevated liver enzymes. Administering the
medication in this state could be life-threatening. Folic acid (Option C) helps prevent minor side
effects but does not address active organ toxicity or myelosuppression. Immediate intervention is
required to avoid severe complications.
Question 2: A client receiving an intravenous infusion of amiodarone for refractory ventricular
tachycardia suddenly develops symptoms of pulmonary toxicity. Which assessment finding is
most indicative of this severe adverse effect?
A) A new onset of a dry, hacking cough and exertional dyspnea.
B) Peripheral edema and weight gain of 1 kg.
C) A decrease in heart rate from 88 to 72 beats per minute.
D) Reports of metallic taste and mild photosensitivity.
Correct Answer: A) A new onset of a dry, hacking cough and exertional dyspnea.
,Explanation: Pulmonary toxicity is a rare but potentially fatal adverse effect of long-term or
high-dose amiodarone therapy. Clinical manifestations include a dry cough, dyspnea, and
pleuritic chest pain. Peripheral edema (Option B) is a sign of heart failure. A decrease in heart
rate (Option C) is an expected pharmacologic effect. Metallic taste and photosensitivity (Option
D) are common, benign side effects.
Question 3: A 65-year-old client with chronic obstructive pulmonary disease (COPD) is
prescribed theophylline. The client calls the clinic reporting nausea, vomiting, and palpitations.
What is the nurse's best response?
A) Instruct the client to take the medication with a meal to reduce GI upset.
B) Advise the client to stop the medication and come to the clinic for a serum theophylline level.
C) Suggest taking an antacid to relieve the nausea.
D) Reassure the client that these are expected initial side effects that will subside.
Correct Answer: B) Advise the client to stop the medication and come to the clinic for a
serum theophylline level.
Explanation: Theophylline has a very narrow therapeutic index. Nausea, vomiting, tachycardia,
and arrhythmias are classic signs of theophylline toxicity. Because these symptoms can rapidly
progress to seizures or life-threatening arrhythmias, the nurse must advise the client to stop the
drug and obtain a serum level to prevent toxicity.
Question 4: A client is receiving a continuous infusion of heparin for a pulmonary embolism.
The nurse notes the client has developed a new ecchymotic area on the abdomen and the aPTT is
120 seconds. What is the priority intervention?
A) Decrease the infusion rate by 2 units/kg/hr.
B) Discontinue the heparin infusion and notify the healthcare provider.
C) Administer a dose of vitamin K.
D) Obtain a baseline hemoglobin and hematocrit.
Correct Answer: B) Discontinue the heparin infusion and notify the healthcare provider.
Explanation: The normal aPTT range is typically 25-35 seconds, with a therapeutic goal of 1.5
to 2.5 times the control. An aPTT of 120 seconds is significantly elevated and indicates a high
risk for spontaneous hemorrhage. Discontinuing the infusion is the priority to allow the
anticoagulation effect to dissipate. Vitamin K (Option C) is the antidote for warfarin, not heparin
(which uses protamine sulfate). Adjusting the rate (Option A) is insufficient for this degree of
anticoagulation.
, Question 5: A client is taking lithium carbonate for bipolar disorder. The client presents with
lethargy, coarse tremors, and confusion. The nurse suspects lithium toxicity. Which concurrent
medication interaction is most likely responsible?
A) Fluoxetine.
B) Ibuprofen.
C) Levothyroxine.
D) Metoprolol.
Correct Answer: B) Ibuprofen.
Explanation: Non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen reduce renal blood
flow and can decrease lithium clearance, leading to toxic serum lithium levels. Fluoxetine,
levothyroxine, and metoprolol do not typically cause this significant pharmacokinetic
interaction. Clients on lithium should be advised to use acetaminophen instead of NSAIDs for
pain management.
Question 6: A nurse is caring for a client who is prescribed clozapine for treatment-resistant
schizophrenia. Which monitoring requirement is most critical to prevent a life-threatening
complication?
A) Monthly fasting blood glucose levels.
B) Weekly white blood cell (WBC) count and absolute neutrophil count (ANC).
C) Daily blood pressure monitoring.
D) Periodic weight and BMI calculations.
Correct Answer: B) Weekly white blood cell (WBC) count and absolute neutrophil count
(ANC).
Explanation: Clozapine carries a black box warning for agranulocytosis, a severe and
potentially fatal reduction in white blood cells. Close monitoring of the CBC with differential
(specifically the ANC) is mandatory to catch this reaction early. While hyperglycemia and
metabolic syndrome (Options A and D) are concerns, they are not the immediate, acute risks that
agranulocytosis presents.
Question 7: A client with chronic heart failure is started on spironolactone. The nurse knows to
monitor for which electrolyte imbalance?
A) Hyperkalemia.
