Green Xanax bar is an antinaxiety medication; its color indicates it is a Green pill. It is a high-potency formulation of Alprazolam that helps to treat anxiety disorder, panic disorder, and phobia with or without agoraphobia. Green Xanax Bars 2Mg is a 2Mg of alprazolam pill that has the imprint of S903 at one side of the bar and XANAX 2Mg. In addition, green xanax bars are rectangular in shape and green in color, with the imprint "SO93" on one side of the bar. It belongs to the benzodizepine group of medications; thereby, it acts as CNS, calms the brain and nerve cells, and reduces hyperactivity of the brain cells.