Improve the smooth muscle around the prostate, including tamsulosin hydrochloride extended-release capsules, doxazosin tablets, terazosin tablets, naftopidil tablets and other drugs, mainly α-receptor blockers, the drug blocking α-receptor after the smooth muscle around the prostate, to achieve diastolic urethra, to restore urination purpose. The application of these drugs have the effect of vasodilatation, so patients with reduced blood pressure can not be used, after taking the drug may cause hypotension, so patients need to dynamically monitor blood pressure changes. And they and antihypertensive drugs can play a synergistic role in lowering blood pressure, for patients with hypertension, taking antihypertensive drugs at the same time to monitor blood pressure, if necessary, to reduce the amount of antihypertensive drugs taken, so as not to cause the time of hypotension. After using the drug patients may also produce dizziness as a side effect, so engaged in aerial work or driving drivers and other occupations, need to take with caution.