White Xanax Bar is Pfizer’s most popular Xanax Bar. The color is white, and XANAX is printed on the tablet’s surface. Three lines divide the beam into four sections.​ Some street vendors call these bars “sticks.” They contain 2 mg of active alprazolam. They are standard prescription bars made by most pharmaceutical companies. With the white Xanax bar, you can feel a powerful soothing effect within minutes. This is because the dose is high enough. It is better to take it under strict medical supervision to avoid abuse.