I've noticed that a lot of pts are sometimes on both a calcium channel blocker and a beta blocker P.O. Why is this? What are the main differences between these two med groups (metoprolol vs cardizem, for example) that would lead a practitioner to prescribe either/or?Are CCBs are used more for rate control and BBs are more for BP control? But then, some ppl take verapamil (CCB) for BP control. And I'm not necessarily talking about the MI core measure either. I know those pts always get a BB.I guess my question is, against what criteria would a practitioner evaluate a pt to receive either or both a CCB or a BB?