I must assume you have chronic (permanent) atrial fibrillation. This being the case, there is no magic medication, but here is a list of some of the currently available.
Amiodarone, also Class III I think, but the strongest in this group.
Sotalol (trade names Betapace)
TIKOSYN® (Dofetilide Capsules)
Antidysrhythmic (Class IC)
There are others, and some other brand names. All are by prescription only, and the Class III, and for some the Class IC, require hospitalization for a couple of days to start. They can have life threatening side-effects (such as ventricle fibrillation) which can be immediately addressed/stopped when in the hospital, intensive-care, I believe.
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