Calcium Channel Blockers. These drugs work by relaxing the blood vessels and reducing the heart rate. These drugs cause the vessel walls to dilate, thus relaxing their walls and lowering blood pressure. Central Nervous System Agents . These drugs prevent the brain from sending impulses that stimulate blood vessels to constrict.
Constriction raises blood pressure.
Angiotensin II Inhibitors. These drugs block the angiotensin receptor found in many tissues, primarily in vascular smooth muscle. It is important to remember that medication is an ongoing treatment, not a cure, for hypertension. Many people mistakenly believe that they can discontinue their medication once their blood pressure reaches a normal level. It is important to get regular check-ups if you are taking blood pressure medicines.