Key takeaways
Disopyramide (Norpace) and Amiodarone (Pacerone) are both antiarrhythmic medications used to treat irregular heart rhythms, but they have some key differences. Disopyramide (Norpace) is available in both immediate-release and extended-release forms, while Amiodarone (Pacerone) is available as tablets and injections. Disopyramide (Norpace) is primarily used for ventricular arrhythmias and is sometimes used off-label for atrial fibrillation and hypertrophic cardiomyopathy, though it is not a first-choice treatment. Amiodarone (Pacerone) is used for life-threatening ventricular arrhythmias and can take a few weeks to work. It is also used off-label for atrial fibrillation. Disopyramide (Norpace) can cause serious side effects like heart failure, while Amiodarone (Pacerone) can cause serious side effects such as lung damage, liver damage, and vision problems. Both medications require close monitoring by a healthcare provider, but Amiodarone (Pacerone) has a longer duration in the body, leading to prolonged side effects. Additionally, Amiodarone (Pacerone) can interact with many other medications and requires regular follow-up tests to monitor for side effects.
