<unk>  is an antiarrhythmic that is FDA approved for the {{{indicationType}}} of symptomatic atrial fibrillation/flutter and life-threatening ventricular arrhythmias. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include chest pain, palpitations, rash, diarrhea, esophagitis, heartburn, nausea, vomiting, lightheadedness, visual disturbance, and fatigue.
Quinidine sulfate
Tilidine
Boldenone
Etidocaine
Lidocaine 
Triprolidine
Chloroprocaine
Quinidine gluconate 