Sotalol
Sotalol is a methanesulfonanilide developed in 1960. It was the first of the class III anti arrhythmic drugs. Sotalol was first approved as an oral tablet on 30 October 1992. A racemic mixture of sotalol is currently formulated as a tablet, oral solution, and intravenous injection indicated for life threatening ventricular arrhythmias and maintaining normal sinus rhythm in atrial fibrillation or flutter.