Xanax is the brand name of the drug Alprazolam and belongs to a class of drugs called benzodiazepines, which act as central nervous system (CNS) depressant. When people buy Xanax online, it is prescribed to be taken for the treatment of anxiety and panic disorders, specifically generalized anxiety disorder (GAD). The drug taken to treat ADHD and Narcolepsy costs in the range of $1 to $6 on the street but don’t go on the price because there is no method to prove whether the drug being sold on the street is real or not.