Doxazosin, primarily for the treatment of essential hypertension as well as prostatic hyperplasia, is an alpha 1 receptor blocker. It selectively acts on postganglionic alpha1-adrenergic receptors to lower blood pressure by causing peripheral vasodilation and lowering the resistance of peripheral vessels. It has essentially no effect on cardiac output, unlike other alpha1 receptor blockers. Doxazosin has a greater effect on postural blood pressure and heart rate, so it is important for people with essential hypertension, especially elderly patients, to be aware of low blood pressure while taking doxazosin. In addition, it can be used for alpha1 adrenergic receptors in smooth muscle and can reduce symptoms such as prostate enlargement. Therefore, doxazosin has two main efficacious effects, the first is the treatment of primary hypertension, and the second is the treatment of prostatic hyperplasia. The above is for reference only, the specific medication and treatment should be based on the doctor’s face-to-face guidance.