Harle is the trade name, generic name of tamsulosin hydrochloride extended-release capsules, suitable for patients with dysuria caused by prostate hyperplasia. The main ingredient of tamsulosin hydrochloride extended-release capsules is tamsulosin hydrochloride, which is an α1-adrenoceptor blocker; it has a highly selective blocking effect on the smooth muscle of the urethra, the neck of the bladder and the prostate, which results in the relaxation of the smooth muscle and the reduction of urethral compression; it can also reduce the prostate pressure in the internal urethral pressure curve to improve the urinary obstruction. It is clinically used for the treatment of patients with urinary obstruction caused by prostatic hyperplasia. For this product allergy, renal insufficiency and children, pregnant women, lactating women are prohibited to take. Some patients taking Tamsulosin Hydrochloride Extended-Release Capsules may experience adverse reactions such as loss of consciousness, dizziness, headache, accelerated heart rate, urticaria, nausea and vomiting, loss of appetite, constipation, abnormal erectile dysfunction of the penis, and blurred vision, etc. In case of any abnormality, the medication should be discontinued immediately and the doctor should be consulted promptly. Overdose of this product may also cause a drop in blood pressure, so be careful with the dosage. It is recommended that patients take Tamsulosin Hydrochloride Extended-Release Capsules in strict accordance with medical advice, to avoid blind use of medication resulting in adverse consequences.