Xanax is a brand name for the drug Alprazolam, which belongs to a class of medications known as benzodiazepines. It is commonly prescribed to treat anxiety and panic disorders. Xanax works by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain, which helps to calm excessive brain activity and reduce feelings of anxiety and panic.

It's important to note that Xanax should only be used under the guidance and prescription of a qualified healthcare professional. Misuse or abuse of Xanax can lead to dependence, addiction, and other adverse effects. It is essential to follow the prescribed dosage and not to exceed it or take it for a longer duration than recommended.