The patient with prostate enlargement can take doxazosin extended-release tablets orally, which can improve the contraction of smooth muscle around the prostate, so that smooth muscle diastole and urethral resistance is reduced, and the patient will experience a smooth urination after taking it. However, doxazosin not only acts on the smooth muscle around the prostate, but also on the vascular smooth muscle tissue, so after taking it, the vascular smooth muscle is relaxed and the blood pressure is lowered, so for patients with low blood pressure, they should not take doxazosin tablets. It is recommended that patients taking doxazosin tablets for prostate enlargement need to monitor their blood pressure regularly. During the medication period, postural hypotension or double black eyes, or even fainting and dizziness may occur. And it should not be taken for work at height or professional drivers, etc., because it can increase the risk of occupation after taking it. In addition, for patients with high blood pressure, if they are taking antihypertensive drugs, they need to follow medical advice to choose the right dose. Because doxazosin extended-release tablets have a synergistic effect with daily antihypertensive drugs, it may lead to a risk of hypotension.