👉 Antiarrhythmic (also known as an "anti-Patent Medicinal Substance") is a type of medication used to treat arrhythmias, which are irregular heartbeats. These arrhythmias can be caused by various factors such as congenital or acquired abnormalities in the heartbeat. Antiarrhythmic drugs work by preventing the electrical signals that cause the heart's rhythm to change, thus reducing the frequency and intensity of those changes. Antiarrhythmic drugs are generally prescribed for a specific