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Antihypertensive drugs are specifically designed to lower blood pressure and manage hypertension. These medications work through various mechanisms, such as relaxing blood vessels, reducing heart rate, or decreasing blood volume, which collectively help maintain optimal blood pressure levels.

The importance of using antihypertensive drugs lies in their targeted action against high blood pressure, which is a major risk factor for cardiovascular diseases such as heart attack and stroke. They include various classes, such as diuretics, ACE inhibitors, calcium channel blockers, and beta-blockers, each with specific indications based on the patient's overall health and response to treatment.

Other medication classes mentioned in the options do not serve this purpose. Antidepressants are used to treat depression and anxiety disorders; antibiotics are used for bacterial infections; and analgesics alleviate pain. None of these have a direct impact on managing hypertension, which solidifies the role of antihypertensive drugs as the appropriate choice for addressing high blood pressure.