Terazosin is effective for male patients with prostate enlargement. Terazosin can relax the smooth muscles of the bladder neck and prostate gland, which can quickly relieve the symptoms of bladder urinary obstruction and improve the quality of life of patients. In addition, it can relieve the obstruction of bladder neck in women and treat urinary retention after childbirth. Terazosin has almost no effect on normal blood pressure. Terazosin not only relieves symptoms in patients with mild to moderate prostate enlargement, but is also effective in severe cases, saving patients with severe cases from surgery. Terazosin works on the same day, the symptoms of obstruction are relieved within 3-15 days, and the peak urinary flow rate is significantly increased. Terazosin can also treat non-bacterial prostatitis due to urinary reflux, prostate pain, and in combination with antibiotics for bacterial prostatitis, it can significantly increase the antibiotic blood concentration in the prostate tissue, improve the efficacy and shorten the course of treatment. These are the effects of Terazosin.