Benign Prostatic Hyperplasia (BPH) is the most common cause of urinary disorders in middle-aged and elderly men. Tamsulosin hydrochloride is a highly selective α-adrenergic receptor inhibitor, with an affinity for α1 receptors that is 5,400 to 24,000 times stronger than its affinity for α2 receptors. It is 13 times more effective in inhibiting increased urethral pressure than it is in inhibiting vascular dilatation pressure. It is suitable for moderate to severe lower urinary tract obstruction. The short-term goal is to relieve the patient's lower urinary tract symptoms, while the long-term goal is to delay the clinical progression of the disease.