Darob works by changing the way your body responds to some nerve impulses, especially in the heart.
It slows down your heart rate and makes it easier for your heart to pump blood around your body.
Sotalol, sold under the brand name Betapace among others, is a medication used to treat and prevent abnormal heart rhythms. Evidence does not support a decreased risk of death with long term use. It is taken by mouth or given by injection into a vein.