A Green Xanax Bar contains a 2mg dose, which is slightly higher than other Xanax medications, and it is prescribed to patients suffering from anxiety and panic attacks. It is more cost-effective for people who require a lower dose because the bar can be easily broken into portions, and you can Buy Green Xanax Bars Online. On either side of a green Xanax bar, the inscription "S 90 3" or "X ANA X" is likely. The bar is shaped like a cuboid and, as the name implies, is green in color, making it easier to distinguish from other doses.