Statins raise blood glucose levels. Statins have been prescribed to diabetics because with diabetes you have a higher risk of heart disease, so they are prescribed as a preventative. However, if (as seems likely) the increased risk of heart disease is actually linked to the increased inflamation resulting from high blood glucose, this move (of taking statins) could actually harm not help.
I have been a Statin sceptic for many years. I got my first high cholesterol reading (I think it was about 8.6) several years ago and had a couple of weeks before the doctor's appointment when statins were to be prescribed. I read all that I could read and decided that statins were not for me.
Thankfully, my doctor respected my decision and they don't bother me about it.
If you want to look into the 'downside' of statin medication, a good starting point is 'The Great Cholesterol Con' by Malcolm Kendrick. Only the early statin trials, prior to 2005, when research was much less controlled and monitored, revealed benefits for statins versus placebo, and in Primary prevention (when you have no pre-existing heart disease) their benefits are minuscule with a a large 'number needed to treat' to produce a potential benefit for one person. Only today, the BMJ has published an update on its endeavours to get the original statin trials to release their raw data for independent scientists to interrogate, 2 years down the line from this endeavour, they have still not got responses from the vast majority of trials.
http://www.bmj.com/campaign/statins-open-data
Personally, I would be far more interested in lowering blood glucose as a primary aim than lowering cholesterol, which, for people with no history of heart disease, has virtually no benefit. My total cholesterol (now, I think, about 7.6) does not worry me in the slightest!