I'm asking this question for a friend who is having trouble with the sign up procedure on dinet. Due to her asthma she cannot tolerate beta blockers AT ALL, she has tried several, and gets shortness of breath. She is not willing to continue living if she doesn't get some relief. She's on Florinef, midodrine, salt & H2O. BB's she has tried. Corgard Coreg Lopressor Toprol XL Bystolic Pinodolol Ace-buterolol