White Xanax bar is a benzodiazepine medication used to treat anxiety disorders and panic attacks. It is a brand name for Alprazolam, which works by increasing the levels of gamma-aminobutyric acid (GABA) in the brain, reducing stress and anxiety. Some individuals use white Xanax bars to relax or treat insomnia, as it has a calming effect. Xanax is available over the counter in the United States without a prescription. It is important to be cautious when purchasing Xanax, as there are counterfeit versions on the market. Fake Xanax pills may have generic packaging, variations in logo design, or no markings on the pills. It is recommended to use a pill identifier to ensure the authenticity of the medication. Always buy Xanax from a reputable pharmacy to ensure quality control.