I started taking Bisoprolol a few weeks ago. I have my first appointment with the cardiologist in a few weeks time. I started on half a tablet of 1.25mg once a day so (0.62mg) which brought my heart rate down to 40-44 beats. (i'm very sensitive to this drug). I now take half a tablet in the morning and half at night. Anyway I was sitting at the dining room table the other day watching some Netflix and suddenly became very breathless. Now I feel quite breathless most of the time. I had an episode the other night and was taken to hospital with 170 bpm. I asked the doctor in A&E about my breathlessness but they put it down to anxiety which I know it is NOT. Dose anyone else suffer with breathlessness on such a low dose of Bisoprolol ?