Domestic and imported tamsulosin hydrochloride have the same efficacy and the same chemical composition, it is the price that is different. Tamsulosin hydrochloride can act on the bladder neck and the prostate part of the urethral smooth muscle, can relax this part of the urethral smooth muscle, reduce urethral resistance, so as to alleviate urinary difficulties, urinary frequency symptoms, in the clinic is mainly used for prostate hyperplasia with urinary obstruction patients. Domestic tamsulosin hydrochloride is through the consistency assessment of efficacy, in principle, the efficacy is the same as imported drugs. Both may have certain side effects, which may lead to postural hypotension or discomfort such as dizziness, rapid heart rate and nausea. It is contraindicated for those with a history of allergy to the product and patients with renal dysfunction; it should be used with caution in patients with postural hypotension. Liver function should be checked regularly when using the drug for a long time. When you need to use the drug should go to the hospital, under the guidance of the doctor to use the drug.