How quickly can you lower cholesterol with medications?

3 months. With appropriate treatment and good life style modification you can start to see results in the 3 months period.
Fast, as in 1 week. Most cholesterol medications will maximally lower cholesterol levels in about a week, however other cardiac benefits such as plaque stabilization may occur even sooner. I typically retest lipids 6 to 12 weeks after starting therapy as this allows time for all laboratory indices to stablize.