Tamsulosin causes dizziness mainly due to the side effects of the drug on the nervous system, which can cause a brief decrease in blood pressure. This causes symptoms of dizziness and headache. Tamsulosin belongs to the alpha receptor blocker, by improving the smooth muscle function of the urethra bladder neck or prostate, and achieve certain therapeutic purposes, clinically used in the treatment of prostate inflammation, prostate hyperplasia. Tamsulosin in addition to neurological adverse reactions, there will be gastrointestinal symptoms, such as nausea, vomiting, a small number of patients will have constipation, diarrhea; may also be allergic reactions, such as itching, skin rash. Patients with upright hypotension, patients with coronary artery disease, renal insufficiency, and those who are allergic to the components of tamsulosin hydrochloride are prohibited from using it, and it is not advisable to drive, maneuver machinery, or perform hazardous operations while taking the drug. Before using Tamsulosin, patients are recommended to visit the hospital in time and use it under the guidance of the doctor, and blood routine, liver function, blood pressure and heart rate should be monitored regularly during the use of the drug to avoid adverse reactions.