The Ultimate RN Pharmacology 2026
Proctored Study Guide: Essential
Q&As with Detailed Nursing
Rationales—From ACE Inhibitors to
Warfarin, Toxicity Antidotes, and
Patient Teaching Priorities
1. A patient is prescribed an ACE inhibitor for hypertension. What
adverse effect requires immediate patient education regarding a
change in taste or swollen tongue?
Answer: Angioedema. Rationale: ACE inhibitors can cause angioedema
(swelling of the face, lips, tongue, or throat) which is a medical emergency
due to airway compromise. Patients must be instructed to stop the
medication and seek emergency care immediately if this occurs.
2. A nurse is administering digoxin to a patient with heart failure.
What lab value is most critical to assess prior to administration?
Answer: Serum potassium level. Rationale: Hypokalemia (low potassium)
increases the risk of digoxin toxicity. The therapeutic range for digoxin is
narrow, and low potassium potentiates its effect on the heart, leading to
dysrhythmias.
3. A patient is started on warfarin. What dietary instruction is most
important regarding vitamin K?
,Answer: Maintain a consistent intake of vitamin K-rich foods (green leafy
vegetables). Rationale: Warfarin works by antagonizing vitamin K. Sudden
increases in vitamin K intake can decrease the drug's effectiveness, while
sudden decreases can increase bleeding risk. Consistency is key.
4. A patient receiving heparin therapy develops bleeding. What is the
antidote?
Answer: Protamine sulfate. Rationale: Protamine sulfate is a specific
antidote that binds to heparin, forming a stable complex and neutralizing
its anticoagulant effects.
5. A patient is prescribed nitroglycerin sublingual tablets for angina.
How should the nurse instruct the patient to take the medication when
chest pain occurs?
Answer: Take one tablet, place it under the tongue, and allow it to dissolve.
If pain is not relieved in 5 minutes, call 911 and take a second tablet. Take a
third tablet in another 5 minutes if pain persists. Rationale: Sublingual
nitroglycerin is rapidly absorbed. The standard protocol is to take up to
three tablets at 5-minute intervals. If the pain is unrelieved after the first
tablet, it may be a myocardial infarction, requiring emergency services.
6. What is the priority nursing action when administering a loop
diuretic like furosemide?
Answer: Assess for orthostatic hypotension and check serum potassium
levels. Rationale: Loop diuretics cause rapid fluid loss and potassium
depletion. Orthostatic hypotension is a common adverse effect due to
decreased blood volume.
7. A patient is prescribed an SSRI for depression. What key patient
teaching should be provided regarding the onset of therapeutic
action?
Answer: It may take 2 to 4 weeks to feel the full therapeutic effects.
,Rationale: SSRIs do not work immediately. Patients need to understand this
to prevent non-adherence due to perceived lack of effectiveness early in
treatment.
8. A patient is taking lithium for bipolar disorder. What are the early
signs of lithium toxicity that the nurse should teach the patient to
report?
Answer: Nausea, vomiting, diarrhea, drowsiness, and fine hand tremors.
Rationale: These are early signs of toxicity. The therapeutic range is narrow,
and levels must be monitored regularly. Dehydration or low sodium intake
can precipitate toxicity.
9. A patient is prescribed metformin for type 2 diabetes. What serious
complication is associated with this medication, especially in patients
with renal impairment?
Answer: Lactic acidosis. Rationale: Metformin can increase the risk of lactic
acidosis, a rare but fatal condition. It is contraindicated in patients with
renal dysfunction, liver disease, or conditions predisposing to hypoxia.
10. A patient is using an albuterol inhaler. What is the most common
side effect the nurse should monitor for?
Answer: Tachycardia and palpitations. Rationale: Albuterol is a beta-2
adrenergic agonist, but it also has beta-1 effects, which can stimulate the
heart, leading to tachycardia and palpitations.
11. A patient with a history of asthma is prescribed a beta-blocker for
hypertension. Why should the nurse question this order?
Answer: Beta-blockers can cause bronchoconstriction. Rationale: Non-
selective beta-blockers block beta-2 receptors in the lungs, which can
precipitate or exacerbate asthma attacks. Cardioselective beta-blockers are
preferred but should still be used with caution.
, 12. A patient is receiving IV morphine. What is the most serious
adverse effect that requires close monitoring?
Answer: Respiratory depression. Rationale: Opioids bind to receptors in the
brainstem, reducing the respiratory rate. The nurse must monitor the rate
and depth of respirations.
13. What is the antidote for a narcotic (opioid) overdose?
Answer: Naloxone. Rationale: Naloxone is a competitive antagonist that
binds to opioid receptors and reverses the effects of opioids, including
respiratory depression.
14. A patient is prescribed amoxicillin. What is the most important
assessment regarding allergies?
Answer: History of allergy to penicillin or cephalosporins. Rationale: There is
a significant cross-sensitivity between penicillins and cephalosporins. An
allergic reaction can range from a rash to anaphylaxis.
15. What instruction should be given to a female patient taking an
antibiotic like doxycycline?
Answer: Use an alternate form of birth control. Rationale: Tetracyclines can
decrease the effectiveness of oral contraceptives. A backup method, such as
condoms, should be used during the course of antibiotics.
16. A patient is prescribed isoniazid for tuberculosis. What side effect
should the nurse teach the patient to report immediately?
Answer: Numbness and tingling of the hands and feet (peripheral
neuropathy). Rationale: INH can cause peripheral neuropathy due to
pyridoxine (vitamin B6) depletion. This can be prevented with vitamin B6
supplementation.
17. A patient is started on atorvastatin. Which lab value should be
monitored to detect a serious adverse effect?
Answer: Liver function tests (AST, ALT). Rationale: Statins can cause
Proctored Study Guide: Essential
Q&As with Detailed Nursing
Rationales—From ACE Inhibitors to
Warfarin, Toxicity Antidotes, and
Patient Teaching Priorities
1. A patient is prescribed an ACE inhibitor for hypertension. What
adverse effect requires immediate patient education regarding a
change in taste or swollen tongue?
Answer: Angioedema. Rationale: ACE inhibitors can cause angioedema
(swelling of the face, lips, tongue, or throat) which is a medical emergency
due to airway compromise. Patients must be instructed to stop the
medication and seek emergency care immediately if this occurs.
2. A nurse is administering digoxin to a patient with heart failure.
What lab value is most critical to assess prior to administration?
Answer: Serum potassium level. Rationale: Hypokalemia (low potassium)
increases the risk of digoxin toxicity. The therapeutic range for digoxin is
narrow, and low potassium potentiates its effect on the heart, leading to
dysrhythmias.
3. A patient is started on warfarin. What dietary instruction is most
important regarding vitamin K?
,Answer: Maintain a consistent intake of vitamin K-rich foods (green leafy
vegetables). Rationale: Warfarin works by antagonizing vitamin K. Sudden
increases in vitamin K intake can decrease the drug's effectiveness, while
sudden decreases can increase bleeding risk. Consistency is key.
4. A patient receiving heparin therapy develops bleeding. What is the
antidote?
Answer: Protamine sulfate. Rationale: Protamine sulfate is a specific
antidote that binds to heparin, forming a stable complex and neutralizing
its anticoagulant effects.
5. A patient is prescribed nitroglycerin sublingual tablets for angina.
How should the nurse instruct the patient to take the medication when
chest pain occurs?
Answer: Take one tablet, place it under the tongue, and allow it to dissolve.
If pain is not relieved in 5 minutes, call 911 and take a second tablet. Take a
third tablet in another 5 minutes if pain persists. Rationale: Sublingual
nitroglycerin is rapidly absorbed. The standard protocol is to take up to
three tablets at 5-minute intervals. If the pain is unrelieved after the first
tablet, it may be a myocardial infarction, requiring emergency services.
6. What is the priority nursing action when administering a loop
diuretic like furosemide?
Answer: Assess for orthostatic hypotension and check serum potassium
levels. Rationale: Loop diuretics cause rapid fluid loss and potassium
depletion. Orthostatic hypotension is a common adverse effect due to
decreased blood volume.
7. A patient is prescribed an SSRI for depression. What key patient
teaching should be provided regarding the onset of therapeutic
action?
Answer: It may take 2 to 4 weeks to feel the full therapeutic effects.
,Rationale: SSRIs do not work immediately. Patients need to understand this
to prevent non-adherence due to perceived lack of effectiveness early in
treatment.
8. A patient is taking lithium for bipolar disorder. What are the early
signs of lithium toxicity that the nurse should teach the patient to
report?
Answer: Nausea, vomiting, diarrhea, drowsiness, and fine hand tremors.
Rationale: These are early signs of toxicity. The therapeutic range is narrow,
and levels must be monitored regularly. Dehydration or low sodium intake
can precipitate toxicity.
9. A patient is prescribed metformin for type 2 diabetes. What serious
complication is associated with this medication, especially in patients
with renal impairment?
Answer: Lactic acidosis. Rationale: Metformin can increase the risk of lactic
acidosis, a rare but fatal condition. It is contraindicated in patients with
renal dysfunction, liver disease, or conditions predisposing to hypoxia.
10. A patient is using an albuterol inhaler. What is the most common
side effect the nurse should monitor for?
Answer: Tachycardia and palpitations. Rationale: Albuterol is a beta-2
adrenergic agonist, but it also has beta-1 effects, which can stimulate the
heart, leading to tachycardia and palpitations.
11. A patient with a history of asthma is prescribed a beta-blocker for
hypertension. Why should the nurse question this order?
Answer: Beta-blockers can cause bronchoconstriction. Rationale: Non-
selective beta-blockers block beta-2 receptors in the lungs, which can
precipitate or exacerbate asthma attacks. Cardioselective beta-blockers are
preferred but should still be used with caution.
, 12. A patient is receiving IV morphine. What is the most serious
adverse effect that requires close monitoring?
Answer: Respiratory depression. Rationale: Opioids bind to receptors in the
brainstem, reducing the respiratory rate. The nurse must monitor the rate
and depth of respirations.
13. What is the antidote for a narcotic (opioid) overdose?
Answer: Naloxone. Rationale: Naloxone is a competitive antagonist that
binds to opioid receptors and reverses the effects of opioids, including
respiratory depression.
14. A patient is prescribed amoxicillin. What is the most important
assessment regarding allergies?
Answer: History of allergy to penicillin or cephalosporins. Rationale: There is
a significant cross-sensitivity between penicillins and cephalosporins. An
allergic reaction can range from a rash to anaphylaxis.
15. What instruction should be given to a female patient taking an
antibiotic like doxycycline?
Answer: Use an alternate form of birth control. Rationale: Tetracyclines can
decrease the effectiveness of oral contraceptives. A backup method, such as
condoms, should be used during the course of antibiotics.
16. A patient is prescribed isoniazid for tuberculosis. What side effect
should the nurse teach the patient to report immediately?
Answer: Numbness and tingling of the hands and feet (peripheral
neuropathy). Rationale: INH can cause peripheral neuropathy due to
pyridoxine (vitamin B6) depletion. This can be prevented with vitamin B6
supplementation.
17. A patient is started on atorvastatin. Which lab value should be
monitored to detect a serious adverse effect?
Answer: Liver function tests (AST, ALT). Rationale: Statins can cause
