Xanax is a brand name for the medication alprazolam, which belongs to a class of drugs called benzodiazepines. It's primarily prescribed to treat anxiety disorders, panic disorder, and sometimes used for the short-term relief of symptoms of anxiety.

Xanax works by enhancing the effects of gamma-aminobutyric acid (GABA), a neurotransmitter in the brain that helps to calm nerve activity. This results in a calming effect on the central nervous system, which can help reduce feelings of anxiety and panic.