An example of a class III antiarrhythmic drug that interferes with potassium outflow is

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Class III antiarrhythmic drugs interfere with potassium outflow, prolonging the action potential duration and refractory period. Amiodarone is a class III antiarrhythmic drug. Lidocaine (A) is a class IB antiarrhythmic drug that interferes with sodium influx, reducing depolarization. Acebutolol (C) is a class II antiarrhythmic drug that blocks beta receptors, reducing sympathetic activation. Verapamil (D) is a class IV antiarrhythmic drug that blocks calcium channels, reducing conduction velocity in the AV node.

An Example of a Class III Antiarrhythmic Drug That Interferes