Buy Xanax Online is a prescription medication used mainly to treat anxiety and panic disorders. It belongs to a class of drugs called benzodiazepines, which act on the brain and nerves (central nervous system) to produce a calming effect. Xanax works by boosting the effects of a natural chemical in the body called GABA (gamma-aminobutyric acid), helping to relieve feelings of anxiety, nervousness, and tension.