Tamsulosin hydrochloride is a drug for the treatment of the urinary system, the main efficacy and action is to relieve symptoms such as difficulty in urination caused by prostate enlargement. It acts selectively on the relevant receptors of the prostate gland and acts to relax the smooth muscle of the prostate gland, thus improving symptoms such as difficulty in urination and dysuria. The drug is usually taken 6-8 hours after the drug is taken, when the blood concentration reaches a peak can play a better role, can be taken on the fourth day after the drug to achieve a more stable state of efficacy. The main indication of the drug in the clinic is the difficulty in urination caused by prostate enlargement, and the improvement of the difficulty in urination is still relatively obvious. The drug is relatively safe, and common adverse effects may include such symptoms as dizziness. In addition, the drug also has a certain effect on this cardiovascular system, and some patients with the drug may experience a drop in blood pressure or postural hypotension, as well as accelerated heart rate and other performance. Therefore, if patients have similar symptoms, we should promptly go to the hospital. In conclusion, tamsulosin hydrochloride is a drug for the treatment of prostate system diseases and is mainly indicated for the treatment of difficulty in urination caused by prostate enlargement, which can effectively improve the symptoms of prostate enlargement.