atrial fibrillation
"I have had intermittent Atrial Fibrillation on and off for 30  years.  Tried cardiac ablation in 2007, but didn't seem to help.  I now take 120mg twice a day and it keeps it in check without side effects.  Does not slow me down and I work out frequently and have great fitness. Tried lowering it to 60 or 80mg but then the AF came back.  First tried Atenolol but did not like the side effects, it slowed me down and affected sex life.  Sotalol slows my heart rate down to 50 beats resting, but does not slow me down in general.  Have not had an AF episode in 18 months since going to 120mgs twice per day."