Mom is 93 and was switched from 80 mg of Sotalol per day to 180 mg Cardia 5 days ago. The first 2 days she felt fine. The last 3 days she has felt lousy (light headed, slightly dizzy and groggy). She takes her Cardia after evening dinner. She is also on 125mcg digoxin, 10 mg Lipitor, 200 mg Elmiron and 244 mg asprin per day. Her BP has been normal and her pulse rate has ranged from 60 to 89 bpm.