Yes, I have asthma and my cardiologist did not put me on a beta-blocker at first. My asthma had been great for 2 years so he put me on beta-blocker and then I had a flare-up 6 mths later and he lowered the amount of beta-blocker but I still had a second asthma flare-up. I have bad allergies too and they have been worse than ever this year. I am going to wait and see if I have another flare-up after a heavy frost when the pollen is done till spring. If I have another flare-up I am going to tell my cardiologist I do not want to take beta-blocker any more even though it works better for atrial fib than a calcium channel blocker. Hope this helps you because I am wondering if the flare-ups were caused from the light winter last year and bad allergies or what.View Thread