Xanax is a prescription medication primarily used for the management of anxiety disorders, panic disorders, and anxiety caused by depression. It is a central nervous system (CNS) depressant that acts on the GABA receptors in the brain, promoting a calming effect and reducing excessive brain activity associated with anxiety. ​People who buy Xanax online get a medication that affects the chemicals present in the patient’s brain, which could be uneven and cause anxiety.