Should a patient with a history of intermittent arial fib be started on norvasc (amlodipine). Already on beta blocker. Is there a better choice?

Possibly. The usual problem with atrial fibrillation is tachycardia, or a rapid heart rate. A beta blocker will help control the heart rate response to you tachycardia, while Norvasc (amlodipine) will not. A fib is usually caused by hypertension, and adequate blood pressure control is important . Maybe a combination of the 2 is what you need. Check with your doctor.