Tamsulosin hydrochloride is primarily used in the treatment of benign prostatic hyperplasia (BPH), a condition where the prostate gland enlarges and causes urinary difficulties. It works by relaxing the muscles in the prostate and bladder neck, making it easier to urinate. This medication helps alleviate symptoms such as weak urine flow, difficulty starting urination, and frequent urination, especially at night. It is often prescribed to improve quality of life for men experiencing these issues. Additionally, it may be used off-label to assist in the passage of kidney stones by relaxing the ureter muscles. It is typically taken orally, once daily, and is most effective when used consistently.