Xanax is the brand name for alprazolam, a prescription medication in the benzodiazepine class. Healthcare professionals commonly purchase Xanax online for the treatment of anxiety disorders and panic disorder. Because Xanax has the potential for dependence and misuse, it is regulated in many countries. It is available in three different dosages, Xanax 1mg, Xanax 2mg, Xanax XR 3mg.