Xanax is a benzodiazepine that improves the activities of certain neurotransmitters in the brain. Xanax is the brand name for alprazolam, and you can buy Yellow Xanax bars online. Xanax helps in treating anxiety disorders and Anxiety caused by depression. It can also be used to treat panic disorders (including agoraphobia). It is helpful in the short-term management of Anxiety, especially panic disorders or GAD (generalised anxiety disorder). Some other uses are the treatment of chemotherapy-induced nausea, and it is taken orally.