Doxazosin Mesylate Extended-Release Tablets belong to the selective alpha adrenergic receptor blockers, which can be used for the symptomatic treatment of benign prostatic hyperplasia, as well as the treatment of hypertension.When taking the drug, the tablets should be swallowed intact and should not be chewed, broken or crushed. Doxazosin Mesylate Extended-Release Tablets can block alpha 1 adrenergic receptors located in the stroma, perineurium, and smooth muscle of the bladder neck, and therefore can relieve the symptoms of straining to urinate and dribbling after urination. Doxazosin Mesylate Extended-Release Tablets block alpha 1-adrenergic receptors in the peripheral vasculature, resulting in a decrease in peripheral vascular resistance, which in turn can lower blood pressure. This drug is not affected by eating or not eating, the drug should be taken with enough water to take the tablets intact, not chewed, broken or crushed after taking, the most commonly used dose of this drug is 4mg once a day. After taking this drug, patients may experience adverse reactions such as dizziness, weakness, edema, rapid heartbeat, panic, nausea, abdominal pain, dyspepsia, hepatitis, jaundice, cough, respiratory tract infections, urinary tract infections, back pain, myalgia, dizziness, and headache. This drug is prohibited for those who are allergic to quinazolines, doxazosin or this drug, for patients who have had myocardial infarction after previous use of doxazosin, and for patients with a history of gastrointestinal obstruction, esophageal obstruction, and other histories of gastrointestinal luminal narrowing. If you need to use doxazosin mesylate extended-release tablets, please under the supervision of a physician.