Yes excellent point, you're doctor shouldn't be even prescribing it if you're asthmatic but not all doctors are thorough. That aside, I have taken propranolol for anxiety before and it was very effective for physical symptoms. my body is very sensitive to adrenaline surges and it's great for that. I only took it as needed and have not needed it in months.

If you participate in vigorous exercise, reduce or delay your dose if it's clouse to a workout. Because it slows the heartrate you may not be able to effectively exercise intensely. for light activity, a walk or such it should not be a problem