Buy Xanax Online for the treatment of anxiety Xanax exists as the short-term-acting benzodiazepine that contains the active element known as alprazolam. It comes in three primary forms: immediate release, extended-release, and oral solution. Each of the forms functions differently, and their properties duration in the system may vary. Xanax is prescribed to treat the symptoms of anxiety and its related disorders such as panic attacks. The Xanax dosage varies from one person to another due to the disorder's different health characteristics and intensity.