I am in a similar, but more befuddling situation. I am 60. I have been n Lipitor for some time. No big eal I think. But I have recently had stents put in due to coronary artery disease (mostly hereditary). So now I am on statins, anti-clotting medicine, beta blockers, and blood pressure medicine. At first I hit a brick wall at 15 mi after the intervention ands medication. I stopped taking the blood pressure and beta blocker medicine in the morning ad took it at dinner. That helped a lot. That got me past the distance hurdle. But now I am at a speed hurdle. I had my beta blocker dose reduced to half, but it is still there. I wonder now if it is an interaction between all the drugs, including Lipitor, which I have been on for years. So the only medicine I have to take is the anti-clotting. I may experiment around with the blood pressure meds now.