You have opened an issue that I would like to discuss. I take one tenormin each mnoring which controls my heart rate and blood pressure very well. However, a symptom of PD is Hypotension and sometimes I get very dizzy due to the low blood preseure developed by PD and my beta blocker. When I go to the fitness center 3 days a week I have problems reaching the target heart rate on the treadmilll due to the Beta Blocker. If I don't take the Tenormin before I go I get to the heart rate just walking into the center. My cardiologist has recomended that I take the beta blocker well before going to the fitness center and don't attempt to get my heart rate any higher than the low end of my target range. Ciao David [log in to unmask]