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Chapter 25 – Antidysrhythmic Drugs | NCLEX-Style Pharmacology Questions with Answers & R, Exams of Pharmacology

Chapman UniversityPharmacology

Chapter 25 – Antidysrhythmic Drugs | NCLEX-Style Pharmacology Questions with Answers & Rationales | A-Graded Nursing Exam Resource

Typology: Exams

2024/2025

Available from 07/05/2025

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Chapter 25 – Antidysrhythmic Drugs |
NCLEX-Style Pharmacology Questions
with Answers & Rationales | A-Graded
Nursing Exam Resource
Lidocaine (Class 1 B)
✔✔✔answer✔✔✔
used for VENTRICULAR DYSRHYTHMIAS ONLY
- if PT has liver disease, reduce dose by 50% (lido is metabolized by the liver)
- works by raisiing ventricular fibrillation threshold, which helps prevent the dysrhythmia
Loading dose adverse effect of Lidocaine
✔✔✔answer✔✔✔
convulsions
Cordarone (amiodarone) (class lll)
✔✔✔answer✔✔✔
prolongs action potential duration
during phase 3
- used for dysrhythmias difficult to treat
- used for life threatening V tach or V fib
-DRUG OF CHOICE for Ventricular dysrrhythmias
- Drug given after MI
NCLEX-Style Questions: Chapter 25 – Antidysrhythmic Drugs
1. A patient with atrial fibrillation is prescribed amiodarone. Which of the following assessments is
most important for the nurse to monitor?
A. Liver function tests
B. Blood glucose
C. Hemoglobin levels
D. Urine ketones
✅
✔✔✔answer✔✔✔
: A
Rationale: Amiodarone can cause hepatotoxicity and requires regular monitoring of liver enzymes.
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Download Chapter 25 – Antidysrhythmic Drugs | NCLEX-Style Pharmacology Questions with Answers & R and more Exams Pharmacology in PDF only on Docsity!

Chapter 25 – Antidysrhythmic Drugs |

NCLEX-Style Pharmacology Questions

with Answers & Rationales | A-Graded

Nursing Exam Resource

Lidocaine (Class 1 B) ✔✔✔answer✔✔✔used for VENTRICULAR DYSRHYTHMIAS ONLY

  • if PT has liver disease, reduce dose by 50% (lido is metabolized by the liver)
  • works by raisiing ventricular fibrillation threshold, which helps prevent the dysrhythmia

Loading dose adverse effect of Lidocaine ✔✔✔answer✔✔✔convulsions

Cordarone (amiodarone) (class lll) ✔✔✔answer✔✔✔prolongs action potential duration

during phase 3

  • used for dysrhythmias difficult to treat
  • used for life threatening V tach or V fib
  • DRUG OF CHOICE for Ventricular dysrrhythmias
  • Drug given after MI NCLEX-Style Questions: Chapter 25 – Antidysrhythmic Drugs
  1. A patient with atrial fibrillation is prescribed amiodarone. Which of the following assessments is most important for the nurse to monitor? A. Liver function tests B. Blood glucose C. Hemoglobin levels D. Urine ketones

✅ ✔✔✔answer✔✔✔: A

Rationale: Amiodarone can cause hepatotoxicity and requires regular monitoring of liver enzymes.

  1. Which antidysrhythmic drug is commonly used to treat supraventricular tachycardia (SVT) and has an ultra-short half-life? A. Lidocaine B. Adenosine C. Diltiazem D. Quinidine

✅ ✔✔✔answer✔✔✔: B

Rationale: Adenosine is the drug of choice for SVT due to its rapid action and extremely short half-life (less than 10 seconds).

  1. A nurse is preparing to administer lidocaine IV for a patient with ventricular dysrhythmias. What condition is a contraindication to lidocaine use? A. Sinus tachycardia B. Second-degree heart block C. Hypertension D. Atrial flutter

✅ ✔✔✔answer✔✔✔: B

Rationale: Lidocaine is contraindicated in patients with certain types of heart block unless a pacemaker is in place.

  1. A nurse knows that Class III antidysrhythmic drugs work primarily by: A. Blocking beta-adrenergic receptors B. Slowing calcium influx in the SA and AV nodes C. Prolonging repolarization D. Increasing vagal tone

✅ ✔✔✔answer✔✔✔: C

Rationale: Class III drugs, like amiodarone, prolong repolarization by blocking potassium channels, helping to stabilize abnormal rhythms.

  1. What is a major side effect associated with chronic use of amiodarone? A. Hyperkalemia B. Pulmonary toxicity C. Bradypsychia D. Hearing loss

A. Constipation B. Rash C. Widened QRS complex on ECG D. Dry mouth

✅ ✔✔✔answer✔✔✔: C

Rationale: A widened QRS complex may indicate toxicity or excessive effect and requires prompt evaluation.

  1. Which teaching point is essential for a patient taking sotalol? A. “Take this medication with an antacid to reduce stomach upset.” B. “It is safe to take over-the- counter decongestants.” C. “Check your pulse daily and report a rate less than 60.” D. “You can drink alcohol freely while taking this medication.”

✅ ✔✔✔answer✔✔✔: C

Rationale: Sotalol is a beta-blocker that can cause bradycardia; patients should monitor heart rate and report abnormalities.

Diltiazem (Class IV) ✔✔✔answer✔✔✔temporary control of new onset patients with rapid

rate atrial fibrillation or flutter and PSVT.

  • used for rapid onset of A fib

Adenosine (Adenocard) ✔✔✔answer✔✔✔-very short 1/2 life (10 sec)

  • only adminstered as fast IV push
  • may cause asystole for a few seconds

Antidysrhythmics adverse effects ✔✔✔answer✔✔✔ALL antidysrhythmics can cause

dysrhythmias! Hypersensitivity reactions Nausea Vomiting Diarrhea Dizziness Blurred vision Headache