Update.  I've been pretty lightheaded still and sorta brain foggy too.  I've checked my bp at home and its 98/74.  Of course at the docs it was 140/88!  The doc is lowering my meds back down to 25mg per day.  I hope that helps.  I originally was only taking 12.5 mg per day and felt break thru palps.  However the docs notices too many pvc's and said I need to increase my meds. So, don't know what is going to happen to me.  It seems I don't tolerate the higher doses of toprol since it lowers my bp too much, BUT without it I have way too many pvc's.  I go back to the docs in 6 weeks for another check up.  Of course, I'm a bit worried about how this is all going to play out.  It stinks because my pvc's are better on the higher doses but I feel so out of it and lightheaded that I can hardly move without feeling woozy.