Cardura tablets to treat high blood pressure, Cardura tablets are used to treat high blood pressure, as it works by dilating the vessels and arteries, reducing total peripheral resistance, and lowering blood pressure. It also helps in treating prostatic hyperplasia and reduces the narrowing of the urethra, which is one of the symptoms of benign prostatic hyperplasia, by inhibiting beta-adrenergic receptors in the tissues of the prostate and bladder neck, and thus improves the process of urination.