Which medication is primarily focused on lowering cholesterol levels?

Zocor is primarily focused on lowering cholesterol levels because it belongs to a class of medications known as statins. Statins work by inhibiting an enzyme involved in the production of cholesterol in the liver, which leads to a decrease in overall cholesterol levels in the blood. This mechanism can help reduce the risk of heart disease and improve cardiovascular health by lowering low-density lipoprotein (LDL), commonly referred to as "bad" cholesterol."

The other medications listed serve different purposes: Zyprexa is an antipsychotic used to treat schizophrenia and bipolar disorder, Zantac was historically used to reduce stomach acid (a histamine 2 blocker), and Zoloft is an antidepressant in the selective serotonin reuptake inhibitor (SSRI) class, employed mainly for managing depression and anxiety disorders. None of these medications have the primary function of lowering cholesterol levels.