Antihypertensive combinations have agents that control blood pressure. One pill or dose form contains more than one class of drug, which is indicated to treat hypertension. Having a combination of drugs in one pill may better control hypertension by improving compliance. Classes of antihypertensive combinations include ACE inhibitors with calcium channel blocking agents, ACE inhibitors with thiazides, angiotensin II inhibitors with calcium channel blockers, angiotensin II inhibitors with thiazide, antiadrenergic agents (central) with thiazide, antiadrenergic agents (peripheral) with thiazide, beta blockers with calcium channel blockers, beta blockers with thiazides and potassium sparing diuretics with thiazides. Antihypertensive combinations that do not fall into these classes are classified as miscellaneous antihypertensive combinations.