Alpha blockers are medications used to treat high blood pressure and other conditions, according to Mayo Clinic. They keep noraderenaline from tightening veins and arteries, thereby keeping blood vessels relaxed and open to improve the flow of blood and effectively lowering blood pressure.
Alpha blockers are sometimes called alpha-adrenergic blocking agents or alpha-blocking agents. Examples of this drug include Cardura, or Doazosin, and Minipress, or Prazosin. Both short-acting and longer-acting formulas are available depending on the needs of the patient.
Additionally, alpha blockers are also sometimes prescribed for treating enlargement of the prostate, notes RxList. Because they relax muscles as well, they can help with urine flow.