Shawnzig,
I was on Lipitor 20mg and Toprol XL 50mg for almost two years, and gradually came to the point where I felt like bird poop on a fence post. I was taking the Toprol for chest pains, and it did help, however I faced ever increasing problems with shortness of breath, extreme tiredness (like falling asleep while eating), and inability to maintain erections. Two months ago my Dr dropped the Toprol to 25mg and I felt 100% better in a matter of days as far as sob and being tired.
I would suggest that your dad talk to his doctor about the side effects he is having, and hopefully they can get in straightened out, or at least show some improvement in his general well being. Good luck.