<unk> (injection) is a calcium channel blocker that is FDA approved for the treatment of atrial fibrillation, atrial flutter, and paroxysmal supraventricular tachycardias (PSVT).   Common adverse reactions include bradyarrhythmia, peripheral edema, dizziness, headache, cough, and fatigue.
Diltiazem 
Bisoprolol
Carvedilol
Digitoxin
Endralazine
Amiodarone 
Metoprolol succinate 
Digoxin