What condition does Mevacor primarily treat?

Mevacor, known generically as lovastatin, is primarily prescribed to manage high cholesterol levels in patients. It belongs to a class of medications called statins, which work by inhibiting an enzyme involved in the production of cholesterol in the liver. By lowering levels of low-density lipoprotein (LDL) cholesterol, often referred to as "bad" cholesterol, Mevacor helps reduce the risk of cardiovascular diseases such as heart attacks and strokes.

In the context of other conditions listed, high blood pressure, diabetes, and schizophrenia are not primarily treated with Mevacor. High blood pressure is typically managed with different classes of medications such as ACE inhibitors or beta-blockers. Diabetes is controlled through insulin therapy or oral hypoglycemic agents. Schizophrenia treatment usually involves antipsychotic medications. Therefore, the use of Mevacor is specifically tailored to target high cholesterol, making it the correct choice for this question.