The green Xanax bars are popularly sold in the United States as the brand name medicine for the treatment of anxiety disorder. The generic name of green Xanax is Alprazolam. There are different types of Xanax bars available in the market, namely white Xanax bars, green Xanax bars, blue Xanax bars, and yellow Xanax bars. However, green Xanax bars are the most common type of Xanax bars and are also available in an extended-release 3mg triangle-shaped pill.