I had some symptoms, like rapid heart beat, (but I also have panic and anxiety attacks, but this was different but maybe a contributor), out of breath, being tired, coughing
... went to see him and I am now on metoprolol
to prevent heart failure. He has also changed my levothyroxine (which I have been taking for over 20 years). I have had some side effects like dizziness but I suffer from vertigo, which I so wonderfully acquired years ago, (I'm my own amusement ride)!