Which of the following is NOT a use for amlodipine?

Amlodipine is primarily a calcium channel blocker used for managing high blood pressure and treating angina, as it functions by relaxing blood vessels to improve blood flow. It's effective in reducing both systolic and diastolic blood pressure and decreasing the frequency of angina attacks through its vasodilatory effects.

While it can have indirect benefits on heart strain by improving blood flow and reducing the workload on the heart, its primary uses do not include the direct treatment of arrhythmias. Arrhythmias are typically managed with antiarrhythmic medications, which are specifically designed to regulate heart rhythm. Therefore, it is accurate to identify that treating arrhythmia is not a recognized or approved use for amlodipine.