Cardura is a medication that contains the active ingredient doxazosin, which belongs to a class of drugs called alpha-blockers. This medication works by relaxing the muscles in your prostate and bladder neck, making it easier for you to urinate. It is commonly used to treat symptoms of an enlarged prostate (benign prostatic hyperplasia) and high blood pressure. Cardura is suitable for men who have difficulty urinating due to prostate enlargement or need to manage their blood pressure effectively.