Primary information associated with Xanax It is an anti-anxiety agent famous for its calming effects on the human central nervous system. Basically, it is one of the different types of benzodiazepine medications prescribed for several medical conditions. This drug is used to prevent anxiety disorder and panic disorder, as it is a brand name version for Alprazolam. Yellow Xanax Bars Several manufacturers are manufacturing this kind of anti-anxiety medication, and each producer wishes to make his medicine different from others. Therefore, they manufacture their products in different colors, shapes, and quantities. Yellow Xanax bars are one of them. It is a high strength of the drug and works to reduce symptoms of anxiety and panic disorder. They may also be prescribed for the treatment of generalized anxiety disorder or GAD