My dad just switched to a new PCP. She did blood work etc. and is now switching all his meds. Dad has been on atenolol for several years. He was started on it for a-fib, and has been doing great. When he went in to Dr, his BP was elevated (not extreme). Mind you he monitors at home weekly and has been good. Anyway the Dr said that he needed to start carvedilol right away.
When his labs came back his A1c was high, and so she also increased his Metformin to 1000mgs.
My concern is that in reading up on carvedilol, that it can really mess with blood sugars. Dad is 80 years old, and I live 800 miles away. I'm not sure he would be able to get himself help in time if something happens.