Key takeaways
Quinidine and Amiodarone (Pacerone) are both antiarrhythmic medications used to treat abnormal heart rhythms, but they have some key differences. Quinidine, available only in generic form, works by blocking sodium channels in the heart, while Amiodarone (Pacerone) blocks various receptors and channels. Quinidine is used for atrial fibrillation, flutter, and ventricular arrhythmias, but it is less commonly used today due to its many side effects and higher risk of death compared to alternatives. Amiodarone (Pacerone), available as both a brand and generic, is used for life-threatening ventricular arrhythmias and can take weeks to work. It must be started in the hospital and has several serious side effects, including lung and liver damage, and long-term effects like blue skin. Both medications require close monitoring, but Amiodarone (Pacerone) stays in the body for many weeks, making its side effects potentially long-lasting.
