Canadian Pharmacist Qualifying Exam Practice · Question
Which antiarrhythmic drug works by blocking potassium channels, prolonging repolarization, and exhibiting effects on sodium and calcium channels?
Amiodarone is a Class III antiarrhythmic that primarily blocks potassium channels but also has effects on sodium and calcium channels, making it effective for v
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Question: Which antiarrhythmic drug works by blocking potassium channels, prolonging repolarization, and exhibiting effects on sodium and calcium channels?
Answer options: ✅ Amiodarone
- Lidocaine
- Diltiazem
- Adenosine
Correct answer: Amiodarone
Explanation: Amiodarone is a Class III antiarrhythmic that primarily blocks potassium channels but also has effects on sodium and calcium channels, making it effective for various arrhythmias.
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