Which of the following is a primary treatment for hypertension?

Calcium channel blockers are a primary treatment for hypertension because they work by inhibiting the influx of calcium ions into the vascular smooth muscle cells and cardiac muscle cells, resulting in vasodilation and decreased contractility. This leads to a reduction in both systemic vascular resistance and blood pressure. They are effective in lowering blood pressure and are often prescribed as first-line therapy for managing hypertension, especially in certain populations such as older adults or those with specific coexisting conditions.

Other treatment options such as statins, antidepressants, and antipyretics do not primarily address hypertension. Statins are primarily used to manage cholesterol levels and reduce cardiovascular risk, antidepressants are used to treat depression and anxiety disorders, and antipyretics are designed to reduce fever. While each of these may play a role in a patient's overall health management, they are not first-line treatments for hypertension.