Terazosin hydrochloride tablets are not antibiotics. 1. Terazosin Hydrochloride is a selective α1 receptor antagonist, which can dilate small arteries and veins, thus playing a role in lowering blood pressure. It is mainly applied to mild-moderate essential hypertension, renal hypertension and pheochromocytoma. In addition, it can reduce the cardiac load, and is also suitable for patients with heart failure. 2. Terazosin hydrochloride tablets have a shorter maintenance time and relatively more side effects, such as: headache, nausea, vomiting, etc. Therefore, in clinical practice, the drug has rarely been used solely to control blood pressure, and is sometimes used in conjunction with other antihypertensive drugs for better results. The use of drugs should be carried out under the guidance of a doctor, do not blindly use drugs, so as not to cause adverse consequences.