What is the primary use of the medication atorvastatin?

Atorvastatin is primarily used to lower cholesterol levels in the blood. It belongs to a class of medications known as statins, which work by inhibiting an enzyme in the liver responsible for producing cholesterol. By reducing the levels of low-density lipoprotein (LDL) cholesterol, commonly referred to as "bad" cholesterol, atorvastatin helps decrease the risk of cardiovascular diseases such as heart attacks and strokes. This medication is particularly important for individuals with high cholesterol or those at risk of heart disease, as it can significantly improve lipid profiles and promote heart health.

In contrast, the other options refer to different therapeutic uses: regulating blood pressure involves medications like antihypertensives, treating diabetes usually requires insulin or oral hypoglycemics, and increasing heart rate typically involves medications like stimulants or certain cardiac agents. Therefore, atorvastatin's role as a cholesterol-lowering agent distinguishes it distinctly from these other functions.