Calcium scan zero. Cholesterol over 300 without meds. Taking 80 Lipitor (atorvastatin) 20 Zetia. Dr. wants me stop Zetia half Lipitor (atorvastatin). Should I?

I'm not too sure. Unless your HDL is really really really high or unless you were experiencing some side effect of one of those medications, a total of 300 sounds just too high, especially at your age (no offense). I would continue the medications in a preventive sense.