I took betablockers for about a year for hypertension and it was the most effective drug I ever tried for that problem. No one took into account that I was asthmatic as a child - I ended up having severe asthma complicated by a severe exacerbaton of my MG. Between the 2 problems I could barely move because I was so short of breath. A briliiant allergist figured out what the problem was & I quit taking the drugs - the asthma subsided but the MG kept going into a downward spiral that I could not pull out of. Be careful - the neurologist and Dr. treating the hypertension need to work closely together on this one as hypertension like you describe MUST get under control for your safety. Best of luck.