I have been diagnosed with paroxysmal AF and next week see my GP for (I hope) reassurance and a 'script for bisoprolol 2.5mg. I feel extremely anxious about the medication. How well will I tolerate it, is it enough, too much? I guess all here had the same concerns and have been answered, but when it comes out of the blue, it is a shock. I am the main earner in our home now, I must carry on working, but dread any side effects, especially any involving lethargy and tiredness - not great my employers. I do have other health issues, but somehow this heart thing has left me unfocussed and worried. Any help would be much appreciated. Thanks.