hi,i am 49 years old and have had open heart bypass surgury about 8 months ago.currently i am taking carvidelol tablets twice a day 6.25 mg each and 10 mg artrovastatin and 80 mg asprin and zanax every day.recently my doctor added digoxin to my medicines after one week of taking that i noticed that i get tired faster and sweat alot more and sooner than normal when i exercise .i started excercise 2 months after my operation about 3 hours daily.istopped taking digoxin and my vision got better and i dont get tired as fast any more but i still sweat too much.please help me