Am I being over prescribed?

I have not discussed concern with my GP since I just came across this web site. I would like to get some feedback before approaching the subject, since I'm not certain about the credibility of the information on here. My main concern is that in the interest of playing it safe, my Dr. might be overly cautious (if there can be such a thing in this day and age) and prescribing a higher dosage than I need, which could have a negative affect on my health which I wouldn't be aware of.

Any replies would be greatly appreciated, especially if I'm misreading this information or not understanding the relationship between preventitive treatment and the actual treatment of high cholesterol.