Have been on Norvasc for about 10 years and now they want to change me to Caduet, Why?

They are two different Meds, at least partially. Lipitor is atorvastatin and Caduet contains atorvastatin and amlodipine, a medicine used to lower blood pressure. So if you have both hyperlipidemia and hypertension then that may be the med for you, however, if you have hyperlipidemia then use atorvastatin.