Blue Xanax (a 17 pill blue Xanax) is one of seven different versions of alprazolam that is a prescription medication and schedule IV controlled substance. Xanax pills are often called Xanax bars due to their long, thin shape. These are the most common forms of Xanax bars: - Blue Xanax bar - Yellow Xanax bar - Peach Xanax tablet - Purple Xanax pill - Green Xanax bar - Pink Xanax bar -White Xanax bar Anxiety pills Xanax is a branded version of alprazolam, a benzodiazepine from the same family as Ativan, Valium, and Klonopin. It is also commonly known as the a 17 pill.