Antihypertensives are drugs used to treat high blood pressure. Antihypertensives are drugs used to treat high blood pressure .
Diuretics work to remove excess salts and water from the body in the form of urine.
The removal of excess water decreases blood volume. The removal of excess salt helps to flush sodium from the walls of the blood vessels, allowing the blood vessels to dilate. Beta blockers slow heart rate and decrease force of contraction of the heart. Alpha blockers dilate blood vessels. Alpha-beta blockers relax blood vessels and slow heart rate.