BMJ Group Medical Reference
This is a type of drug called a beta-blocker. It may be used to make your heart beat normally. But there's no good research to show whether or not it works.
Sotalol (Beta-Cardone, Sotacor) can be given as injections or tablets.
In the UK, sotalol tablets are sometimes used for people who have permanent atrial fibrillation.  But this treatment isn't usually recommended to get your heartbeat back to normal if you've got atrial fibrillation that has started recently.
For references related to Atrial fibrillation click here