Half a tablet of alprazolam per day is not harmful, but long-term use should be avoided. Alprazolam is a kind of medication for treating psychiatric disorders, such as anxiety, depression and insomnia, which can be a good treatment for the disease and relieve some of the symptoms during the acute attack of the disease. Adverse reactions such as drowsiness, fatigue, dizziness, dry mouth and constipation may occur depending on individual constitution. In addition, Alprazolam should not be taken by people who are allergic to the product and the ingredients contained in it, patients with acute or susceptible closed-angle glaucoma attacks, patients with hepatic or renal impairment, patients with myasthenia gravis, respiratory insufficiency, pregnant or breastfeeding women, and so on. Overuse of Alprazolam can cause patients to become dependent and addicted, which leads to bad withdrawal from the drug. When there is a withdrawal reaction from the use of Alprazolam tablets, the withdrawal reaction itself is painful, and the withdrawal is accompanied by increased anxiety and depressive symptoms in the patient. Long-term use of alprazolam may lead to pharmacologic depression, because the main mechanism of alprazolam is to elevate the Y-aminobutyric acidergic transmitter in the brain, long-term use of alprazolam anxiety may be reduced, but may lead to pharmacologic depression. If you need to take alprazolam, it is recommended to take under the guidance of a doctor to avoid adverse reactions.