I had one a few years ago. It's kind of a scary experience that tends to stick with you. So, if your dad seems not quite himself for awhile, don't worry. It's an adjustment. Lipitor, better eating habits, some exercise and a few good checkups, does wonders for your outlook. I'm lighter, stronger, have more stamina and energy now, than 10 years ago. When you get into your 60s, you just have to work harder at being fit.