Alpha blockers are used to treat high blood pressure and benign prostatic hyperplasia (BPH). They also have other uses, such as managing pheochromocytoma. Alpha blockers work by relaxing the blood vessels throughout the body, including the prostate. They help to improve blood flow and also to reduce BPH symptoms like difficulty urinating. These medications are usually taken as oral pills. Examples include tamsulosin (Flomax), prazosin (Minipress), and doxazosin (Cardura). You can discuss with your healthcare provider to find the best option for you.