I would suggest that you schedule an appointment with a cardiologist
to discuss this issue. Atorvastatin is one of the most common medications to be prescribed for cholesterol issues. It is also sold in the trade name Lipitor. The cholesterol level that you are quoting at 7.8 is an odd number and I am not sure how to interpret that without the units included. 40 mg is a fairly typical dose of atorvastatin and half of the maximum dose. Your doctor
is probably rightfully placing you on this medication especially if you had a mini stroke at some point. This means that you probably have some type of vascular disease and atorvastatin is often used for this, especially when cholesterol levels are slightly high. Weight loss
and exercise do help bring cholesterol down, but they can only work so much. After you get your cholesterol levels down, some people do try to come off the medication, but usually the cholesterol levels rise again. If you tolerate the medication and do not have significant side effects, then your doctor will probably want to keep you on it. Again, I would suggest that you schedule an appointment with a cardiologist to further discuss this issue. Cardiologists have the most experience with lipid lowering drugs such as atorvastatin and would be would help you with your question.