One of the top selling drugs of all time is Lipitor. Lipitor is the chemical compound of Atorvastatin calcium marketed by Viatris currently and was originally sold by Pfizer. Lipitor sales peaked at nearly $13 Billion during 2006 and sold $2 Billion during 2019. The Lipitor patent rolled off in 2011 when sales were $10 Billion.
The science behind Atorvastatin calcium is that it lowers your LDL-cholesterol by inhibiting HMG-CoA reductase. It lowers total cholesterol, low-density lipoprotein-cholesterol (LDL-C), apolipoprotein B (apo B), non-high density lipoprotein-cholesterol (non-HDL-C), and triglyceride (TG) plasma concentrations while increasing HDL-C concentrations.